Rewrite gameserver slot filter system (#763)

* Initial implementation of new slot sorting and filtering system

* Initial implementation of filtering for lbp3 community tab

* Add support for organization on lbp3

* Add playlist and user categories

* Implement unit tests for all filters
Refactor more systems to use PaginationData

* Fix PlayerCountFilter test

* Add more unit tests and integration tests for the filter system

* Fix LBP2 move filter and gameFilterType

* Fix sort by likes in LBP3 category

* Add sort for total plays

* Remove extra whitespace and make styling more consistent

* Order hearted and queued levels by primary key ID

* Fix query without order warnings

ProjectLighthouse.Servers.API/Controllers/StatisticsEndpoints.cs

@@ -1,4 +1,6 @@
 using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
 using LBPUnion.ProjectLighthouse.Helpers;
 using LBPUnion.ProjectLighthouse.Servers.API.Responses;
 using LBPUnion.ProjectLighthouse.Types.Users;
@@ -31,10 +33,10 @@ public class StatisticsEndpoints : ApiEndpointController
             new StatisticsResponse
             {
                 Photos = await StatisticsHelper.PhotoCount(this.database),
-                Slots = await StatisticsHelper.SlotCount(this.database),
+                Slots = await StatisticsHelper.SlotCount(this.database, new SlotQueryBuilder()),
                 Users = await StatisticsHelper.UserCount(this.database),
                 RecentMatches = await StatisticsHelper.RecentMatches(this.database),
-                TeamPicks = await StatisticsHelper.TeamPickCount(this.database),
+                TeamPicks = await StatisticsHelper.SlotCount(this.database, new SlotQueryBuilder().AddFilter(new TeamPickFilter())),
             }
         );
 

ProjectLighthouse.Servers.GameServer/Controllers/CommentController.cs

@@ -4,6 +4,7 @@ using LBPUnion.ProjectLighthouse.Extensions;
 using LBPUnion.ProjectLighthouse.Helpers;
 using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
 using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
 using LBPUnion.ProjectLighthouse.Types.Levels;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
 using LBPUnion.ProjectLighthouse.Types.Users;
@@ -42,12 +43,10 @@ public class CommentController : ControllerBase
 
     [HttpGet("comments/{slotType}/{slotId:int}")]
     [HttpGet("userComments/{username}")]
-    public async Task<IActionResult> GetComments([FromQuery] int pageStart, [FromQuery] int pageSize, string? username, string? slotType, int slotId)
+    public async Task<IActionResult> GetComments(string? username, string? slotType, int slotId)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0 || pageStart < 0) return this.BadRequest();
-
         if ((slotId == 0 || SlotHelper.IsTypeInvalid(slotType)) == (username == null)) return this.BadRequest();
 
         if (slotType == "developer") slotId = await SlotHelper.GetPlaceholderSlotId(this.database, slotId, SlotType.Developer);
@@ -55,6 +54,8 @@ public class CommentController : ControllerBase
         int targetId;
         CommentType type = username == null ? CommentType.Level : CommentType.Profile;
 
+        PaginationData pageData = this.Request.GetPaginationData();
+
         if (type == CommentType.Level)
         {
             targetId = await this.database.Slots.Where(s => s.SlotId == slotId)
@@ -82,8 +83,7 @@ public class CommentController : ControllerBase
             .Where(p => !blockedUsers.Contains(p.PosterUserId))
             .Include(c => c.Poster)
             .Where(p => p.Poster.PermissionLevel != PermissionLevel.Banned)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(c => GameComment.CreateFromEntity(c, token.UserId));
 
         return this.Ok(new CommentListResponse(comments));

ProjectLighthouse.Servers.GameServer/Controllers/Login/ClientConfigurationController.cs

@@ -10,7 +10,7 @@ using LBPUnion.ProjectLighthouse.Types.Users;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 
-namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Login;
 
 [ApiController]
 [Authorize]

ProjectLighthouse.Servers.GameServer/Controllers/Login/LoginController.cs

@@ -13,7 +13,7 @@ using LBPUnion.ProjectLighthouse.Types.Users;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 
-namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Login;
 
 [ApiController]
 [Route("LITTLEBIGPLANETPS3_XML/login")]

ProjectLighthouse.Servers.GameServer/Controllers/Login/LogoutController.cs

@@ -6,7 +6,7 @@ using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 
-namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Login;
 
 [ApiController]
 [Authorize]

ProjectLighthouse.Servers.GameServer/Controllers/ReportController.cs

@@ -64,5 +64,4 @@ public class ReportController : ControllerBase
 
         return this.Ok();
     }
-
 }

ProjectLighthouse.Servers.GameServer/Controllers/Resources/PhotosController.cs

@@ -8,6 +8,7 @@ using LBPUnion.ProjectLighthouse.Logging;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
 using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
 using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
 using LBPUnion.ProjectLighthouse.Types.Levels;
 using LBPUnion.ProjectLighthouse.Types.Logging;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
@@ -159,54 +160,53 @@ public class PhotosController : ControllerBase
     }
 
     [HttpGet("photos/{slotType}/{id:int}")]
-    public async Task<IActionResult> SlotPhotos([FromQuery] int pageStart, [FromQuery] int pageSize, string slotType, int id)
+    public async Task<IActionResult> SlotPhotos(string slotType, int id)
     {
-        if (pageSize <= 0) return this.BadRequest();
 
         if (SlotHelper.IsTypeInvalid(slotType)) return this.BadRequest();
 
         if (slotType == "developer") id = await SlotHelper.GetPlaceholderSlotId(this.database, id, SlotType.Developer);
 
+        PaginationData pageData = this.Request.GetPaginationData();
+
         List<GamePhoto> photos = (await this.database.Photos.Include(p => p.PhotoSubjects)
             .Where(p => p.SlotId == id)
             .OrderByDescending(s => s.Timestamp)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(GamePhoto.CreateFromEntity);
 
         return this.Ok(new PhotoListResponse(photos));
     }
 
     [HttpGet("photos/by")]
-    public async Task<IActionResult> UserPhotosBy([FromQuery] string user, [FromQuery] int pageStart, [FromQuery] int pageSize)
+    public async Task<IActionResult> UserPhotosBy(string user)
     {
-        if (pageSize <= 0) return this.BadRequest();
 
         int targetUserId = await this.database.UserIdFromUsername(user);
         if (targetUserId == 0) return this.NotFound();
 
+        PaginationData pageData = this.Request.GetPaginationData();
+
         List<GamePhoto> photos = (await this.database.Photos.Include(p => p.PhotoSubjects)
             .Where(p => p.CreatorId == targetUserId)
             .OrderByDescending(s => s.Timestamp)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(GamePhoto.CreateFromEntity);
         return this.Ok(new PhotoListResponse(photos));
     }
 
     [HttpGet("photos/with")]
-    public async Task<IActionResult> UserPhotosWith([FromQuery] string user, [FromQuery] int pageStart, [FromQuery] int pageSize)
+    public async Task<IActionResult> UserPhotosWith(string user)
     {
-        if (pageSize <= 0) return this.BadRequest();
-
         int targetUserId = await this.database.UserIdFromUsername(user);
         if (targetUserId == 0) return this.NotFound();
 
+        PaginationData pageData = this.Request.GetPaginationData();
+
         List<GamePhoto> photos = (await this.database.Photos.Include(p => p.PhotoSubjects)
             .Where(p => p.PhotoSubjects.Any(ps => ps.UserId == targetUserId))
             .OrderByDescending(s => s.Timestamp)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(GamePhoto.CreateFromEntity);
 
         return this.Ok(new PhotoListResponse(photos));

ProjectLighthouse.Servers.GameServer/Controllers/Slots/CategoryController.cs

@@ -0,0 +1,169 @@
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Logging;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Logging;
+using LBPUnion.ProjectLighthouse.Types.Misc;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Slots;
+
+[ApiController]
+[Authorize]
+[Route("LITTLEBIGPLANETPS3_XML/")]
+[Produces("text/xml")]
+public class CategoryController : ControllerBase
+{
+    private readonly DatabaseContext database;
+
+    public CategoryController(DatabaseContext database)
+    {
+        this.database = database;
+    }
+
+    [HttpGet("searches")]
+    [HttpGet("genres")]
+    public async Task<IActionResult> GenresAndSearches()
+    {
+        GameTokenEntity token = this.GetToken();
+
+        UserEntity? user = await this.database.UserFromGameToken(token);
+        if (user == null) return this.Forbid();
+
+        PaginationData pageData = this.Request.GetPaginationData();
+
+        pageData.TotalElements = CategoryHelper.Categories.Count;
+
+        if (!int.TryParse(this.Request.Query["num_categories_with_results"], out int results)) results = 5;
+
+        List<GameCategory> categories = new();
+
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
+
+        foreach (Category category in CategoryHelper.Categories.Skip(Math.Max(0, pageData.PageStart - 1))
+                     .Take(Math.Min(pageData.PageSize, pageData.MaxElements))
+                     .ToList())
+        {
+            int numResults = results > 0 ? 1 : 0;
+            categories.Add(await category.Serialize(this.database, token, queryBuilder, numResults));
+            results--;
+        }
+
+        return this.Ok(new CategoryListResponse(categories, pageData.TotalElements, "", pageData.HintStart));
+    }
+
+    [HttpGet("searches/{endpointName}")]
+    public async Task<IActionResult> GetCategorySlots(string endpointName)
+    {
+        GameTokenEntity token = this.GetToken();
+
+        UserEntity? user = await this.database.UserFromGameToken(token);
+        if (user == null) return this.Forbid();
+
+        Category? category = CategoryHelper.Categories.FirstOrDefault(c => c.Endpoint == endpointName);
+        if (category == null) return this.NotFound();
+
+        PaginationData pageData = this.Request.GetPaginationData();
+
+        Logger.Debug("Found category " + category, LogArea.Category);
+
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
+
+        GenericSerializableList returnList = category switch
+        {
+            SlotCategory gc => await this.GetSlotCategory(gc, token, queryBuilder, pageData),
+            PlaylistCategory pc => await this.GetPlaylistCategory(pc, token, pageData),
+            UserCategory uc => await this.GetUserCategory(uc, token, pageData),
+            _ => new GenericSerializableList(),
+        };
+
+        return this.Ok(returnList);
+    }
+
+    private async Task<GenericSerializableList> GetUserCategory(UserCategory userCategory, GameTokenEntity token, PaginationData pageData)
+    {
+        int totalUsers = await userCategory.GetItems(this.database, token).CountAsync();
+        pageData.TotalElements = totalUsers;
+        IQueryable<UserEntity> userQuery = userCategory.GetItems(this.database, token).ApplyPagination(pageData);
+
+        List<ILbpSerializable> users =
+            (await userQuery.ToListAsync()).ToSerializableList<UserEntity, ILbpSerializable>(GameUser
+                .CreateFromEntity);
+        return new GenericSerializableList(users, pageData);
+    }
+
+    private async Task<GenericSerializableList> GetPlaylistCategory(PlaylistCategory playlistCategory, GameTokenEntity token, PaginationData pageData)
+    {
+        int totalPlaylists = await playlistCategory.GetItems(this.database, token).CountAsync();
+        pageData.TotalElements = totalPlaylists;
+        IQueryable<PlaylistEntity> playlistQuery = playlistCategory.GetItems(this.database, token).ApplyPagination(pageData);
+
+        List<ILbpSerializable> playlists =
+            (await playlistQuery.ToListAsync()).ToSerializableList<PlaylistEntity, ILbpSerializable>(GamePlaylist
+                .CreateFromEntity);
+        return new GenericSerializableList(playlists, pageData);
+    }
+
+    private async Task<GenericSerializableList> GetSlotCategory(SlotCategory slotCategory, GameTokenEntity token, SlotQueryBuilder queryBuilder, PaginationData pageData)
+    {
+        int totalSlots = await slotCategory.GetItems(this.database, token, queryBuilder).CountAsync();
+        pageData.TotalElements = totalSlots;
+        IQueryable<SlotEntity> slotQuery = slotCategory.GetItems(this.database, token, queryBuilder).ApplyPagination(pageData);
+
+        if (bool.TryParse(this.Request.Query["includePlayed"], out bool includePlayed) && !includePlayed)
+        {
+            slotQuery = slotQuery.Select(s => new SlotMetadata
+                {
+                    Slot = s,
+                    Played = this.database.VisitedLevels.Any(v => v.SlotId == s.SlotId && v.UserId == token.UserId),
+                })
+                .Where(s => !s.Played)
+                .Select(s => s.Slot);
+        }
+
+        if (this.Request.Query.ContainsKey("sort"))
+        {
+            string sort = (string?)this.Request.Query["sort"] ?? "";
+            slotQuery = sort switch
+            {
+                "relevance" => slotQuery.ApplyOrdering(new SlotSortBuilder<SlotEntity>()
+                    .AddSort(new UniquePlaysTotalSort())
+                    .AddSort(new LastUpdatedSort())),
+                "likes" => slotQuery.Select(s => new SlotMetadata
+                    {
+                        Slot = s,
+                        ThumbsUp = this.database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),
+                    })
+                    .OrderByDescending(s => s.ThumbsUp)
+                    .Select(s => s.Slot),
+                "hearts" => slotQuery.Select(s => new SlotMetadata
+                    {
+                        Slot = s,
+                        Hearts = this.database.HeartedLevels.Count(h => h.SlotId == s.SlotId),
+                    })
+                    .OrderByDescending(s => s.Hearts)
+                    .Select(s => s.Slot),
+                "date" => slotQuery.ApplyOrdering(new SlotSortBuilder<SlotEntity>().AddSort(new FirstUploadedSort())),
+                "plays" => slotQuery.ApplyOrdering(
+                    new SlotSortBuilder<SlotEntity>().AddSort(new UniquePlaysTotalSort()).AddSort(new TotalPlaysSort())),
+                _ => slotQuery,
+            };
+        }
+
+        List<ILbpSerializable> slots =
+            (await slotQuery.ToListAsync()).ToSerializableList<SlotEntity, ILbpSerializable>(s =>
+                SlotBase.CreateFromEntity(s, token));
+        return new GenericSerializableList(slots, pageData);
+    }
+}

ProjectLighthouse.Servers.GameServer/Controllers/Slots/CollectionController.cs

@@ -2,13 +2,8 @@
 using LBPUnion.ProjectLighthouse.Configuration;
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
-using LBPUnion.ProjectLighthouse.Logging;
-using LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
 using LBPUnion.ProjectLighthouse.Types.Entities.Token;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Logging;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
@@ -148,95 +143,4 @@ public class CollectionController : ControllerBase
 
         return this.Ok(await this.GetUserPlaylists(targetUserId));
     }
-
-    [HttpGet("searches")]
-    [HttpGet("genres")]
-    public async Task<IActionResult> GenresAndSearches()
-    {
-        GameTokenEntity token = this.GetToken();
-
-        UserEntity? user = await this.database.UserFromGameToken(token);
-        if (user == null) return this.Forbid();
-
-        List<GameCategory> categories = new();
-
-        foreach (Category category in CategoryHelper.Categories.ToList())
-        {
-            if(category is CategoryWithUser categoryWithUser) categories.Add(categoryWithUser.Serialize(this.database, user));
-            else categories.Add(category.Serialize(this.database));
-        }
-
-        return this.Ok(new CategoryListResponse(categories, CategoryHelper.Categories.Count, 0, 1));
-    }
-
-    [HttpGet("searches/{endpointName}")]
-    public async Task<IActionResult> GetCategorySlots(string endpointName, [FromQuery] int pageStart, [FromQuery] int pageSize,
-        [FromQuery] int players = 0,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? labelFilter3 = null,
-        [FromQuery] string? labelFilter4 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] string? adventure = null
-    )
-    {
-        GameTokenEntity token = this.GetToken();
-
-        UserEntity? user = await this.database.UserFromGameToken(token);
-        if (user == null) return this.Forbid();
-
-        Category? category = CategoryHelper.Categories.FirstOrDefault(c => c.Endpoint == endpointName);
-        if (category == null) return this.NotFound();
-
-        Logger.Debug("Found category " + category, LogArea.Category);
-
-        List<SlotEntity> slots;
-        int totalSlots;
-
-        if (category is CategoryWithUser categoryWithUser)
-        {
-            slots = (await categoryWithUser.GetSlots(this.database, user, pageStart, pageSize)
-                .ToListAsync());
-            totalSlots = categoryWithUser.GetTotalSlots(this.database, user);
-        }
-        else
-        {
-            slots = category.GetSlots(this.database, pageStart, pageSize)
-                .ToList();
-            totalSlots = category.GetTotalSlots(this.database);
-        }
-
-        slots = this.filterSlots(slots, players + 1, labelFilter0, labelFilter1, labelFilter2, labelFilter3, labelFilter4, move, adventure);
-
-        return this.Ok(new GenericSlotResponse("results", slots.ToSerializableList(s => SlotBase.CreateFromEntity(s, token)), totalSlots, pageStart + pageSize));
-    }
-
-    private List<SlotEntity> filterSlots(List<SlotEntity> slots, int players, string? labelFilter0 = null, string? labelFilter1 = null, string? labelFilter2 = null, string? labelFilter3 = null, string? labelFilter4 = null, string? move = null, string? adventure = null)
-    {
-        slots.RemoveAll(s => s.MinimumPlayers != players);
-
-        if (labelFilter0 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter0));
-        if (labelFilter1 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter1));
-        if (labelFilter2 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter2));
-        if (labelFilter3 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter3));
-        if (labelFilter4 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter4));
-
-        if (move == "noneCan")
-            slots.RemoveAll(s => s.MoveRequired);
-        if (move == "allMust")
-            slots.RemoveAll(s => !s.MoveRequired);
-
-        if (adventure == "noneCan")
-            slots.RemoveAll(s => s.IsAdventurePlanet);
-        if (adventure == "allMust")
-            slots.RemoveAll(s => !s.IsAdventurePlanet);
-
-        return slots;
-    }
 }

ProjectLighthouse.Servers.GameServer/Controllers/Slots/ListController.cs

@@ -1,11 +1,13 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
 using LBPUnion.ProjectLighthouse.Helpers;
-using LBPUnion.ProjectLighthouse.Types.Entities.Interaction;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
 using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
 using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
 using LBPUnion.ProjectLighthouse.Types.Levels;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
 using LBPUnion.ProjectLighthouse.Types.Users;
@@ -22,6 +24,7 @@ namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Slots;
 public class ListController : ControllerBase
 {
     private readonly DatabaseContext database;
+
     public ListController(DatabaseContext database)
     {
         this.database = database;
@@ -32,31 +35,30 @@ public class ListController : ControllerBase
     #region Level Queue (lolcatftw)
 
     [HttpGet("slots/lolcatftw/{username}")]
-    public async Task<IActionResult> GetQueuedLevels
-    (
-        string username,
-        [FromQuery] int pageStart,
-        [FromQuery] int pageSize,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] int? players = null,
-        [FromQuery] bool? move = null,
-        [FromQuery] string? dateFilterType = null
-    )
+    public async Task<IActionResult> GetQueuedLevels(string username)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        List<SlotBase> queuedLevels = (await this.filterListByRequest(gameFilterType, dateFilterType, token.GameVersion, username, ListFilterType.Queue)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync())
-            .ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        int targetUserId = await this.database.Users.Where(u => u.Username == username)
+            .Select(u => u.UserId)
+            .FirstOrDefaultAsync();
+        if (targetUserId == 0) return this.BadRequest();
 
-        int total = await this.database.QueuedLevels.CountAsync(q => q.UserId == token.UserId);
-        int start = pageStart + Math.Min(pageSize, 30);
+        pageData.TotalElements = await this.database.QueuedLevels.CountAsync(q => q.UserId == targetUserId);
 
-        return this.Ok(new GenericSlotResponse(queuedLevels, total, start));
+        IQueryable<SlotEntity> baseQuery = this.database.QueuedLevels.Where(h => h.UserId == targetUserId)
+            .OrderByDescending(q => q.QueuedLevelId)
+            .Include(q => q.Slot)
+            .Select(q => q.Slot);
+
+        List<SlotBase> queuedLevels = await baseQuery.GetSlots(token,
+            this.FilterFromRequest(token),
+            pageData,
+            new SlotSortBuilder<SlotEntity>());
+
+        return this.Ok(new GenericSlotResponse(queuedLevels, pageData));
     }
 
     [HttpPost("lolcatftw/add/user/{id:int}")]
@@ -102,37 +104,33 @@ public class ListController : ControllerBase
     #region Hearted Levels
 
     [HttpGet("favouriteSlots/{username}")]
-    public async Task<IActionResult> GetFavouriteSlots
-    (
-        string username,
-        [FromQuery] int pageStart,
-        [FromQuery] int pageSize,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] int? players = null,
-        [FromQuery] bool? move = null,
-        [FromQuery] string? dateFilterType = null
-    )
+    public async Task<IActionResult> GetFavouriteSlots(string username)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        UserEntity? targetUser = await this.database.Users.FirstOrDefaultAsync(u => u.Username == username);
-        if (targetUser == null) return this.Forbid();
+        int targetUserId = await this.database.Users.Where(u => u.Username == username)
+            .Select(u => u.UserId)
+            .FirstOrDefaultAsync();
+        if (targetUserId == 0) return this.BadRequest();
 
-        List<SlotBase> heartedLevels = (await this.filterListByRequest(gameFilterType, dateFilterType, token.GameVersion, username, ListFilterType.FavouriteSlots)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        pageData.TotalElements = await this.database.HeartedLevels.CountAsync(h => h.UserId == targetUserId);
 
+        IQueryable<SlotEntity> baseQuery = this.database.HeartedLevels.Where(h => h.UserId == targetUserId)
+            .OrderByDescending(h => h.HeartedLevelId)
+            .Include(h => h.Slot)
+            .Select(h => h.Slot);
 
-        int total = await this.database.HeartedLevels.CountAsync(q => q.UserId == targetUser.UserId);
-        int start = pageStart + Math.Min(pageSize, 30);
+        List<SlotBase> heartedLevels = await baseQuery.GetSlots(token,
+            this.FilterFromRequest(token),
+            pageData,
+            new SlotSortBuilder<SlotEntity>());
 
-        return this.Ok(new GenericSlotResponse("favouriteSlots", heartedLevels, total, start));
+        return this.Ok(new GenericSlotResponse("favouriteSlots", heartedLevels, pageData));
     }
 
-    private const int FirstLbp2DeveloperSlotId = 124806; // This is the first known level slot GUID in LBP2. Feel free to change it if a lower one is found.
+    private const int firstLbp2DeveloperSlotId = 124806; // This is the first known level slot GUID in LBP2. Feel free to change it if a lower one is found.
 
     [HttpPost("favourite/slot/{slotType}/{id:int}")]
     public async Task<IActionResult> AddFavouriteSlot(string slotType, int id)
@@ -148,7 +146,7 @@ public class ListController : ControllerBase
 
         if (slotType == "developer")
         {
-            GameVersion slotGameVersion = (slot.InternalSlotId < FirstLbp2DeveloperSlotId) ? GameVersion.LittleBigPlanet1 : token.GameVersion;
+            GameVersion slotGameVersion = (slot.InternalSlotId < firstLbp2DeveloperSlotId) ? GameVersion.LittleBigPlanet1 : token.GameVersion;
             slot.GameVersion = slotGameVersion;
         }
 
@@ -171,7 +169,7 @@ public class ListController : ControllerBase
 
         if (slotType == "developer")
         {
-            GameVersion slotGameVersion = (slot.InternalSlotId < FirstLbp2DeveloperSlotId) ? GameVersion.LittleBigPlanet1 : token.GameVersion;
+            GameVersion slotGameVersion = (slot.InternalSlotId < firstLbp2DeveloperSlotId) ? GameVersion.LittleBigPlanet1 : token.GameVersion;
             slot.GameVersion = slotGameVersion;
         }
         
@@ -185,26 +183,27 @@ public class ListController : ControllerBase
     #region Hearted Playlists
 
     [HttpGet("favouritePlaylists/{username}")]
-    public async Task<IActionResult> GetFavouritePlaylists(string username, [FromQuery] int pageStart, [FromQuery] int pageSize)
+    public async Task<IActionResult> GetFavouritePlaylists(string username)
     {
-        if (pageSize <= 0) return this.BadRequest();
 
         int targetUserId = await this.database.UserIdFromUsername(username);
         if (targetUserId == 0) return this.Forbid();
 
+        PaginationData pageData = this.Request.GetPaginationData();
+
         List<GamePlaylist> heartedPlaylists = (await this.database.HeartedPlaylists.Where(p => p.UserId == targetUserId)
             .Include(p => p.Playlist)
-            .Include(p => p.Playlist.Creator)
             .OrderByDescending(p => p.HeartedPlaylistId)
             .Select(p => p.Playlist)
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(GamePlaylist.CreateFromEntity);
 
-        int total = await this.database.HeartedPlaylists.CountAsync(p => p.UserId == targetUserId);
+        pageData.TotalElements = await this.database.HeartedPlaylists.CountAsync(p => p.UserId == targetUserId);
 
         return this.Ok(new GenericPlaylistResponse<GamePlaylist>("favouritePlaylists", heartedPlaylists)
         {
-            Total = total,
-            HintStart = pageStart + Math.Min(pageSize, 30),
+            Total = pageData.TotalElements,
+            HintStart = pageData.HintStart,
         });
     }
 
@@ -241,26 +240,27 @@ public class ListController : ControllerBase
     #region Users
 
     [HttpGet("favouriteUsers/{username}")]
-    public async Task<IActionResult> GetFavouriteUsers(string username, [FromQuery] int pageSize, [FromQuery] int pageStart)
+    public async Task<IActionResult> GetFavouriteUsers(string username)
     {
         GameTokenEntity token = this.GetToken();
 
-        UserEntity? targetUser = await this.database.Users.FirstOrDefaultAsync(u => u.Username == username);
-        if (targetUser == null) return this.Forbid();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        if (pageSize <= 0) return this.BadRequest();
+        int targetUserId = await this.database.Users.Where(u => u.Username == username)
+            .Select(u => u.UserId)
+            .FirstOrDefaultAsync();
+        if (targetUserId == 0) return this.BadRequest();
+
+        pageData.TotalElements = await this.database.HeartedProfiles.CountAsync(h => h.UserId == targetUserId);
 
         List<GameUser> heartedProfiles = (await this.database.HeartedProfiles.Include(h => h.HeartedUser)
             .OrderBy(h => h.HeartedProfileId)
-            .Where(h => h.UserId == targetUser.UserId)
+            .Where(h => h.UserId == targetUserId)
             .Select(h => h.HeartedUser)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(u => GameUser.CreateFromEntity(u, token.GameVersion));
 
-        int total = await this.database.HeartedProfiles.CountAsync(h => h.UserId == targetUser.UserId);
-
-        return this.Ok(new GenericUserResponse<GameUser>("favouriteUsers", heartedProfiles, total, pageStart + Math.Min(pageSize, 30)));
+        return this.Ok(new GenericUserResponse<GameUser>("favouriteUsers", heartedProfiles, pageData));
     }
 
     [HttpPost("favourite/user/{username}")]
@@ -288,85 +288,5 @@ public class ListController : ControllerBase
 
         return this.Ok();
     }
-
     #endregion
-
-    #region Filtering
-    internal enum ListFilterType // used to collapse code that would otherwise be two separate functions
-    {
-        Queue,
-        FavouriteSlots,
-    }
-
-    private static GameVersion getGameFilter(string? gameFilterType, GameVersion version)
-    {
-        return version switch
-        {
-            GameVersion.LittleBigPlanetVita => GameVersion.LittleBigPlanetVita,
-            GameVersion.LittleBigPlanetPSP => GameVersion.LittleBigPlanetPSP,
-            _ => gameFilterType switch
-            {
-                "lbp1" => GameVersion.LittleBigPlanet1,
-                "lbp2" => GameVersion.LittleBigPlanet2,
-                "lbp3" => GameVersion.LittleBigPlanet3,
-                "both" => GameVersion.LittleBigPlanet2, // LBP2 default option
-                null => GameVersion.LittleBigPlanet1,
-                _ => GameVersion.Unknown,
-            }
-        };
-    }
-
-    private IQueryable<SlotEntity> filterListByRequest(string? gameFilterType, string? dateFilterType, GameVersion version, string username, ListFilterType filterType)
-    {
-        if (version is GameVersion.LittleBigPlanetPSP or GameVersion.Unknown)
-        {
-            return this.database.Slots.ByGameVersion(version, false, true);
-        }
-
-        long oldestTime = dateFilterType switch
-        {
-            "thisWeek" => DateTimeOffset.Now.AddDays(-7).ToUnixTimeMilliseconds(),
-            "thisMonth" => DateTimeOffset.Now.AddDays(-31).ToUnixTimeMilliseconds(),
-            _ => 0,
-        };
-
-        GameVersion gameVersion = getGameFilter(gameFilterType, version);
-
-        // The filtering only cares if this isn't equal to 'both'
-        if (version == GameVersion.LittleBigPlanetVita) gameFilterType = "lbp2";
-
-        if (filterType == ListFilterType.Queue)
-        {
-            IQueryable<QueuedLevelEntity> whereQueuedLevels;
-
-            // ReSharper disable once ConvertIfStatementToConditionalTernaryExpression
-            if (gameFilterType == "both")
-                // Get game versions less than the current version
-                // Needs support for LBP3 ("both" = LBP1+2)
-                whereQueuedLevels = this.database.QueuedLevels.Where(q => q.User.Username == username)
-                .Where(q => q.Slot.Type == SlotType.User && !q.Slot.Hidden && q.Slot.GameVersion <= gameVersion && q.Slot.FirstUploaded >= oldestTime);
-            else
-                // Get game versions exactly equal to gamefiltertype
-                whereQueuedLevels = this.database.QueuedLevels.Where(q => q.User.Username == username)
-                .Where(q => q.Slot.Type == SlotType.User && !q.Slot.Hidden && q.Slot.GameVersion == gameVersion && q.Slot.FirstUploaded >= oldestTime);
-
-            return whereQueuedLevels.OrderByDescending(q => q.QueuedLevelId).Include(q => q.Slot.Creator).Select(q => q.Slot).ByGameVersion(gameVersion, false, false, true);
-        }
-
-        IQueryable<HeartedLevelEntity> whereHeartedLevels;
-
-        // ReSharper disable once ConvertIfStatementToConditionalTernaryExpression
-        if (gameFilterType == "both")
-            // Get game versions less than the current version
-            // Needs support for LBP3 ("both" = LBP1+2)
-            whereHeartedLevels = this.database.HeartedLevels.Where(h => h.User.Username == username)
-                .Where(h => (h.Slot.Type == SlotType.User || h.Slot.Type == SlotType.Developer) && !h.Slot.Hidden && h.Slot.GameVersion <= gameVersion && h.Slot.FirstUploaded >= oldestTime);
-        else
-            // Get game versions exactly equal to gamefiltertype
-            whereHeartedLevels = this.database.HeartedLevels.Where(h => h.User.Username == username)
-                .Where(h => (h.Slot.Type == SlotType.User || h.Slot.Type == SlotType.Developer) && !h.Slot.Hidden && h.Slot.GameVersion == gameVersion && h.Slot.FirstUploaded >= oldestTime);
-
-        return whereHeartedLevels.OrderByDescending(h => h.HeartedLevelId).Include(h => h.Slot.Creator).Select(h => h.Slot).ByGameVersion(gameVersion, false, false, true);
-    }
-    #endregion Filtering
 }

ProjectLighthouse.Servers.GameServer/Controllers/Slots/ReviewController.cs

@@ -5,8 +5,8 @@ using LBPUnion.ProjectLighthouse.Helpers;
 using LBPUnion.ProjectLighthouse.Types.Entities.Interaction;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
 using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
-using LBPUnion.ProjectLighthouse.Types.Users;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
@@ -28,7 +28,7 @@ public class ReviewController : ControllerBase
 
     // LBP1 rating
     [HttpPost("rate/user/{slotId:int}")]
-    public async Task<IActionResult> Rate(int slotId, [FromQuery] int rating)
+    public async Task<IActionResult> Rate(int slotId, int rating)
     {
         GameTokenEntity token = this.GetToken();
 
@@ -57,7 +57,7 @@ public class ReviewController : ControllerBase
 
     // LBP2 and beyond rating
     [HttpPost("dpadrate/user/{slotId:int}")]
-    public async Task<IActionResult> DPadRate(int slotId, [FromQuery] int rating)
+    public async Task<IActionResult> DPadRate(int slotId, int rating)
     {
         GameTokenEntity token = this.GetToken();
 
@@ -142,54 +142,47 @@ public class ReviewController : ControllerBase
     }
 
     [HttpGet("reviewsFor/user/{slotId:int}")]
-    public async Task<IActionResult> ReviewsFor(int slotId, [FromQuery] int pageStart = 1, [FromQuery] int pageSize = 10)
+    public async Task<IActionResult> ReviewsFor(int slotId)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
-
-        GameVersion gameVersion = token.GameVersion;
+        PaginationData pageData = this.Request.GetPaginationData();
 
         SlotEntity? slot = await this.database.Slots.FirstOrDefaultAsync(s => s.SlotId == slotId);
         if (slot == null) return this.BadRequest();
 
-        List<GameReview> reviews = (await this.database.Reviews.ByGameVersion(gameVersion, true)
+        List<GameReview> reviews = (await this.database.Reviews
             .Where(r => r.SlotId == slotId)
             .OrderByDescending(r => r.ThumbsUp - r.ThumbsDown)
             .ThenByDescending(r => r.Timestamp)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(r => GameReview.CreateFromEntity(r, token));
 
-
-        return this.Ok(new ReviewResponse(reviews, reviews.LastOrDefault()?.Timestamp ?? TimeHelper.TimestampMillis, pageStart + Math.Min(pageSize, 30)));
+        return this.Ok(new ReviewResponse(reviews, reviews.LastOrDefault()?.Timestamp ?? TimeHelper.TimestampMillis, pageData.HintStart));
     }
 
     [HttpGet("reviewsBy/{username}")]
-    public async Task<IActionResult> ReviewsBy(string username, [FromQuery] int pageStart = 1, [FromQuery] int pageSize = 10)
+    public async Task<IActionResult> ReviewsBy(string username)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
-
-        GameVersion gameVersion = token.GameVersion;
+        PaginationData pageData = this.Request.GetPaginationData();
 
         int targetUserId = await this.database.UserIdFromUsername(username);
 
         if (targetUserId == 0) return this.BadRequest();
 
-        List<GameReview> reviews = (await this.database.Reviews.ByGameVersion(gameVersion, true)
+        List<GameReview> reviews = (await this.database.Reviews
             .Where(r => r.ReviewerId == targetUserId)
             .OrderByDescending(r => r.Timestamp)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
+            .ApplyPagination(pageData)
             .ToListAsync()).ToSerializableList(r => GameReview.CreateFromEntity(r, token));
 
-        return this.Ok(new ReviewResponse(reviews, reviews.LastOrDefault()?.Timestamp ?? TimeHelper.TimestampMillis, pageStart));
+        return this.Ok(new ReviewResponse(reviews, reviews.LastOrDefault()?.Timestamp ?? TimeHelper.TimestampMillis, pageData.HintStart));
     }
 
     [HttpPost("rateReview/user/{slotId:int}/{username}")]
-    public async Task<IActionResult> RateReview(int slotId, string username, [FromQuery] int rating = 0)
+    public async Task<IActionResult> RateReview(int slotId, string username, int rating = 0)
     {
         GameTokenEntity token = this.GetToken();
 

ProjectLighthouse.Servers.GameServer/Controllers/Slots/SearchController.cs

@@ -1,14 +1,16 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
 using LBPUnion.ProjectLighthouse.Types.Entities.Token;
-using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Filter;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Query.SqlExpressions;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Slots;
 
@@ -25,102 +27,29 @@ public class SearchController : ControllerBase
     }
 
     [HttpGet("searchLBP3")]
-    public Task<IActionResult> SearchSlotsLBP3([FromQuery] int pageSize, [FromQuery] int pageStart, [FromQuery] string textFilter,
-        [FromQuery] int? players = 0,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? labelFilter3 = null,
-        [FromQuery] string? labelFilter4 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] string? adventure = null) 
-        => this.SearchSlots(textFilter, pageSize, pageStart, "results", false, players+1, labelFilter0, labelFilter1, labelFilter2, labelFilter3, labelFilter4, move, adventure);
+    public Task<IActionResult> SearchSlotsLBP3([FromQuery] string textFilter) 
+        => this.SearchSlots(textFilter, "results");
 
     [HttpGet("search")]
-    public async Task<IActionResult> SearchSlots(
-        [FromQuery] string query,
-        [FromQuery] int pageSize,
-        [FromQuery] int pageStart,
-        string? keyName = "slots",
-        bool crosscontrol = false,
-        [FromQuery] int? players = null,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? labelFilter3 = null,
-        [FromQuery] string? labelFilter4 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] string? adventure = null
-    )
+    public async Task<IActionResult> SearchSlots([FromQuery] string query, string? keyName = "slots")
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
         if (string.IsNullOrWhiteSpace(query)) return this.BadRequest();
 
-        query = query.ToLower();
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
 
-        string[] keywords = query.Split(" ");
+        queryBuilder.AddFilter(new TextFilter(query));
 
-        IQueryable<SlotEntity> dbQuery = this.database.Slots.ByGameVersion(token.GameVersion, false, true)
-            .Where(s => s.Type == SlotType.User && s.CrossControllerRequired == crosscontrol)
-            .OrderBy(s => !s.TeamPick)
-            .ThenByDescending(s => s.FirstUploaded)
-            .Where(s => s.SlotId >= 0); // dumb query to conv into IQueryable
+        pageData.TotalElements = await this.database.Slots.Where(queryBuilder.Build()).CountAsync();
 
-        // ReSharper disable once LoopCanBeConvertedToQuery
-        foreach (string keyword in keywords)
-            dbQuery = dbQuery.Where
-            (
-                s => s.Name.ToLower().Contains(keyword) ||
-                     s.Description.ToLower().Contains(keyword) ||
-                     s.Creator!.Username.ToLower().Contains(keyword) ||
-                     s.SlotId.ToString().Equals(keyword)
-            );
+        List<SlotBase> slots = await this.database.Slots.Include(s => s.Creator)
+            .GetSlots(token, queryBuilder, pageData, new SlotSortBuilder<SlotEntity>());
 
-        List<SlotEntity> slots = (await dbQuery.Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync());
-
-        slots = filterSlots(slots, players, labelFilter0, labelFilter1, labelFilter2, labelFilter3, labelFilter4, move, adventure);
-
-        return this.Ok(new GenericSlotResponse(keyName, slots.ToSerializableList(s => SlotBase.CreateFromEntity(s, token)), await dbQuery.CountAsync(), 0));
+        return this.Ok(new GenericSlotResponse(keyName, slots, pageData));
     }
 
     // /LITTLEBIGPLANETPS3_XML?pageStart=1&pageSize=10&resultTypes[]=slot&resultTypes[]=playlist&resultTypes[]=user&adventure=dontCare&textFilter=qwer
-
-    private List<SlotEntity> filterSlots(List<SlotEntity> slots, int? players = null, string? labelFilter0 = null, string? labelFilter1 = null, string? labelFilter2 = null, string? labelFilter3 = null, string? labelFilter4 = null, string? move = null, string? adventure = null)
-    {
-        if (players != null)
-            slots.RemoveAll(s => s.MinimumPlayers != players);
-
-        if (labelFilter0 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter0));
-        if (labelFilter1 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter1));
-        if (labelFilter2 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter2));
-        if (labelFilter3 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter3));
-        if (labelFilter4 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter4));
-
-        if (move == "false")
-            slots.RemoveAll(s => s.MoveRequired);
-        if (move == "only")
-            slots.RemoveAll(s => !s.MoveRequired);
-
-        if (move == "noneCan")
-            slots.RemoveAll(s => s.MoveRequired);
-        if (move == "allMust")
-            slots.RemoveAll(s => !s.MoveRequired);
-
-        if (adventure == "noneCan")
-            slots.RemoveAll(s => s.IsAdventurePlanet);
-        if (adventure == "allMust")
-            slots.RemoveAll(s => !s.IsAdventurePlanet);
-
-        return slots;
-    }
 }

ProjectLighthouse.Servers.GameServer/Controllers/Slots/SlotsController.cs

@@ -1,10 +1,16 @@
 #nullable enable
-using LBPUnion.ProjectLighthouse.Configuration;
+using System.Linq.Expressions;
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
+using LBPUnion.ProjectLighthouse.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Filter.Sorts.Metadata;
 using LBPUnion.ProjectLighthouse.Helpers;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
 using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
 using LBPUnion.ProjectLighthouse.Types.Levels;
 using LBPUnion.ProjectLighthouse.Types.Matchmaking.Rooms;
 using LBPUnion.ProjectLighthouse.Types.Misc;
@@ -23,34 +29,31 @@ namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Slots;
 public class SlotsController : ControllerBase
 {
     private readonly DatabaseContext database;
+
     public SlotsController(DatabaseContext database)
     {
         this.database = database;
     }
 
     [HttpGet("slots/by")]
-    public async Task<IActionResult> SlotsBy([FromQuery(Name = "u")] string username, [FromQuery] int pageStart, [FromQuery] int pageSize, [FromQuery] bool crosscontrol = false)
+    public async Task<IActionResult> SlotsBy([FromQuery(Name = "u")] string username)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
-
         int targetUserId = await this.database.UserIdFromUsername(username);
         if (targetUserId == 0) return this.NotFound();
 
-        int usedSlots = this.database.Slots.Count(s => s.CreatorId == targetUserId);
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        List<SlotBase> slots = (await this.database.Slots.Where(s => s.CreatorId == targetUserId)
-            .ByGameVersion(token.GameVersion, token.UserId == targetUserId)
-            .Where(match => match.CrossControllerRequired == crosscontrol)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, usedSlots))
-            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        pageData.TotalElements = await this.database.Slots.CountAsync(s => s.CreatorId == targetUserId);
 
-        int start = pageStart + Math.Min(pageSize, usedSlots);
-        int total = await this.database.Slots.CountAsync(s => s.CreatorId == targetUserId && s.CrossControllerRequired == crosscontrol);
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token).AddFilter(new CreatorFilter(targetUserId));
 
-        return this.Ok(new GenericSlotResponse("slots", slots, total, start));
+        SlotSortBuilder<SlotEntity> sortBuilder = new SlotSortBuilder<SlotEntity>().AddSort(new FirstUploadedSort());
+
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder);
+
+        return this.Ok(new GenericSlotResponse("slots", slots, pageData));
     }
 
     [HttpGet("slotList")]
@@ -61,7 +64,7 @@ public class SlotsController : ControllerBase
         List<SlotBase> slots = new();
         foreach (int slotId in slotIds)
         {
-            SlotEntity? slot = await this.database.Slots.Include(t => t.Creator).Where(t => t.SlotId == slotId && t.Type == SlotType.User).FirstOrDefaultAsync();
+            SlotEntity? slot = await this.database.Slots.Where(t => t.SlotId == slotId && t.Type == SlotType.User).FirstOrDefaultAsync();
             if (slot == null)
             {
                 slot = await this.database.Slots.Where(t => t.InternalSlotId == slotId && t.Type == SlotType.Developer).FirstOrDefaultAsync();
@@ -102,7 +105,7 @@ public class SlotsController : ControllerBase
     }
 
     [HttpGet("s/developer/{id:int}")]
-    public async Task<IActionResult> SDev(int id)
+    public async Task<IActionResult> DeveloperSlot(int id)
     {
         GameTokenEntity token = this.GetToken();
 
@@ -113,13 +116,12 @@ public class SlotsController : ControllerBase
     } 
 
     [HttpGet("s/user/{id:int}")]
-    public async Task<IActionResult> SUser(int id)
+    public async Task<IActionResult> UserSlot(int id)
     {
         GameTokenEntity token = this.GetToken();
 
-        GameVersion gameVersion = token.GameVersion;
-
-        SlotEntity? slot = await this.database.Slots.ByGameVersion(gameVersion, true, true).FirstOrDefaultAsync(s => s.SlotId == id);
+        SlotEntity? slot = await this.database.Slots.Where(this.GetDefaultFilters(token).Build())
+            .FirstOrDefaultAsync(s => s.SlotId == id);
 
         if (slot == null) return this.NotFound();
 
@@ -127,66 +129,40 @@ public class SlotsController : ControllerBase
     }
 
     [HttpGet("slots/cool")]
-    public async Task<IActionResult> Lbp1CoolSlots([FromQuery] int page)
-    {
-        const int pageSize = 30;
-        return await this.CoolSlots((page - 1) * pageSize, pageSize);
-    }
+    public async Task<IActionResult> Lbp1CoolSlots() => await this.CoolSlots();
 
     [HttpGet("slots/lbp2cool")]
-    public async Task<IActionResult> CoolSlots
-    (
-        [FromQuery] int pageStart,
-        [FromQuery] int pageSize,
-        [FromQuery] int players = 1,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] int? page = null,
-        [FromQuery] bool crosscontrol = false
-    )
-    {
-        if (page != null) pageStart = (int)page * 30;
-        // bit of a better placeholder until we can track average user interaction with /stream endpoint
-        return await this.ThumbsSlots(pageStart, Math.Min(pageSize, 30), players, gameFilterType, "thisMonth", 
-            labelFilter0, labelFilter1, labelFilter2, move, crosscontrol);
-    }
+    public async Task<IActionResult> CoolSlots() => await this.ThumbsSlots();
 
     [HttpGet("slots")]
-    public async Task<IActionResult> NewestSlots([FromQuery] int pageStart, [FromQuery] int pageSize, [FromQuery] bool crosscontrol = false)
+    public async Task<IActionResult> NewestSlots()
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        GameVersion gameVersion = token.GameVersion;
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
 
-        List<SlotBase> slots = (await this.database.Slots.ByGameVersion(gameVersion, false, true)
-            .Where(s => s.CrossControllerRequired == crosscontrol)
-            .OrderByDescending(s => s.FirstUploaded)
-            .ThenByDescending(s => s.SlotId)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        pageData.TotalElements = await StatisticsHelper.SlotCount(this.database, queryBuilder);
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = await StatisticsHelper.SlotCountForGame(this.database, token.GameVersion);
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        SlotSortBuilder<SlotEntity> sortBuilder = new();
+        sortBuilder.AddSort(new FirstUploadedSort());
+        sortBuilder.AddSort(new SlotIdSort());
+
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/like/{slotType}/{slotId:int}")]
-    public async Task<IActionResult> SimilarSlots([FromRoute] string slotType, [FromRoute] int slotId, [FromQuery] int pageStart, [FromQuery] int pageSize)
+    public async Task<IActionResult> SimilarSlots([FromRoute] string slotType, [FromRoute] int slotId)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
         if (slotType != "user") return this.BadRequest();
 
-        GameVersion gameVersion = token.GameVersion;
-
         SlotEntity? targetSlot = await this.database.Slots.FirstOrDefaultAsync(s => s.SlotId == slotId);
         if (targetSlot == null) return this.BadRequest();
 
@@ -198,275 +174,180 @@ public class SlotsController : ControllerBase
             .Select(r => r.SlotId)
             .ToList();
 
-        List<SlotBase> slots = (await this.database.Slots.ByGameVersion(gameVersion, false, true)
-            .Where(s => slotIdsWithTag.Contains(s.SlotId))
-            .OrderByDescending(s => s.PlaysLBP1)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        pageData.TotalElements = slotIdsWithTag.Count;
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = slotIdsWithTag.Count;
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token).AddFilter(0, new SlotIdFilter(slotIdsWithTag));
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        SlotSortBuilder<SlotEntity> sortBuilder = new();
+        sortBuilder.AddSort(new PlaysForGameSort(GameVersion.LittleBigPlanet1));
+
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/highestRated")]
-    public async Task<IActionResult> HighestRatedSlots([FromQuery] int pageStart, [FromQuery] int pageSize)
+    public async Task<IActionResult> HighestRatedSlots()
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        GameVersion gameVersion = token.GameVersion;
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
 
-        List<SlotBase> slots = (await this.database.Slots.ByGameVersion(gameVersion, false, true)
-            .Select(s => new SlotMetadata
-            {
-                Slot = s,
-                RatingLbp1 = this.database.RatedLevels.Where(r => r.SlotId == s.SlotId).Average(r => (double?)r.RatingLBP1) ?? 3.0,
-            })
-            .OrderByDescending(s => s.RatingLbp1)
-            .Select(s => s.Slot)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        pageData.TotalElements = await StatisticsHelper.SlotCount(this.database, queryBuilder);
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = await StatisticsHelper.SlotCount(this.database); 
+        SlotSortBuilder<SlotMetadata> sortBuilder = new();
+        sortBuilder.AddSort(new RatingLBP1Sort());
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        Expression<Func<SlotEntity, SlotMetadata>> selectorFunc = s => new SlotMetadata
+        {
+            Slot = s,
+            RatingLbp1 = this.database.RatedLevels.Where(r => r.SlotId == s.SlotId)
+                .Average(r => (double?)r.RatingLBP1) ?? 3.0,
+        };
+
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder, selectorFunc);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/tag")]
-    public async Task<IActionResult> SimilarSlots([FromQuery] string tag, [FromQuery] int pageStart, [FromQuery] int pageSize)
+    public async Task<IActionResult> SimilarSlots([FromQuery] string tag)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
         List<int> slotIdsWithTag = await this.database.RatedLevels.Where(r => r.TagLBP1.Length > 0)
             .Where(r => r.TagLBP1 == tag)
             .Select(s => s.SlotId)
             .ToListAsync();
 
-        List<SlotBase> slots = (await this.database.Slots.Where(s => slotIdsWithTag.Contains(s.SlotId))
-            .ByGameVersion(token.GameVersion, false, true)
-            .OrderByDescending(s => s.PlaysLBP1)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        pageData.TotalElements = slotIdsWithTag.Count;
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = slotIdsWithTag.Count;
+        SlotSortBuilder<SlotEntity> sortBuilder = new();
+        sortBuilder.AddSort(new PlaysForGameSort(GameVersion.LittleBigPlanet1));
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        List<SlotBase> slots = await this.database.GetSlots(token, this.FilterFromRequest(token), pageData, sortBuilder);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/mmpicks")]
-    public async Task<IActionResult> TeamPickedSlots
-    (
-        [FromQuery] int pageStart, 
-        [FromQuery] int pageSize, 
-        [FromQuery] int players,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] string? dateFilterType = null,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] bool crosscontrol = false
-    )
+    public async Task<IActionResult> TeamPickedSlots()
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        List<SlotBase> slots = this.filterSlots((await this.filterByRequest(gameFilterType, dateFilterType, token.GameVersion)
-            .Where(s => s.TeamPick && s.CrossControllerRequired == crosscontrol)
-            .OrderByDescending(s => s.LastUpdated)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()), players, labelFilter0, labelFilter1, labelFilter2, move).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = await StatisticsHelper.TeamPickCountForGame(this.database, token.GameVersion, crosscontrol);
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token).AddFilter(new TeamPickFilter());
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        pageData.TotalElements = await StatisticsHelper.SlotCount(this.database, queryBuilder);
+
+        SlotSortBuilder<SlotEntity> sortBuilder = new();
+        sortBuilder.AddSort(new LastUpdatedSort());
+
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/lbp2luckydip")]
-    public async Task<IActionResult> LuckyDipSlots
-    (
-        [FromQuery] int pageStart, 
-        [FromQuery] int pageSize, 
-        [FromQuery] int seed,
-        [FromQuery] int players = 1,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] string? dateFilterType = null,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] bool crosscontrol = false
-    )
+    public async Task<IActionResult> LuckyDipSlots([FromQuery] int seed)
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        GameVersion gameVersion = token.GameVersion;
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
 
-        const double biasFactor = .8f;
-        List<SlotBase> slots = this.filterSlots((await this.filterByRequest(gameFilterType, dateFilterType, token.GameVersion)
-            .Where(s => s.CrossControllerRequired == crosscontrol)
-            .OrderByDescending(s => EF.Functions.Random() * (s.FirstUploaded * biasFactor))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()), players, labelFilter0, labelFilter1, labelFilter2, move).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        pageData.TotalElements = await StatisticsHelper.SlotCount(this.database, queryBuilder);
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = await StatisticsHelper.SlotCountForGame(this.database, token.GameVersion);
+        SlotSortBuilder<SlotEntity> sortBuilder = new();
+        sortBuilder.AddSort(new RandomFirstUploadedSort());
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/thumbs")]
-    public async Task<IActionResult> ThumbsSlots
-    (
-        [FromQuery] int pageStart,
-        [FromQuery] int pageSize,
-        [FromQuery] int players,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] string? dateFilterType = null,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] bool crosscontrol = false
-    )
+    public async Task<IActionResult> ThumbsSlots()
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        List<SlotBase> slots = this.filterSlots((await this.filterByRequest(gameFilterType, dateFilterType, token.GameVersion)
-            .Where(s => s.CrossControllerRequired == crosscontrol)
-            .Select(s => new SlotMetadata
-            {
-                Slot = s,
-                ThumbsUp = this.database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),
-            })
-            .OrderByDescending(s => s.ThumbsUp)
-            .ThenBy(_ => EF.Functions.Random())
-            .Select(s => s.Slot)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()), players, labelFilter0, labelFilter1, labelFilter2, move).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = await StatisticsHelper.SlotCountForGame(this.database, token.GameVersion);
+        pageData.TotalElements = await StatisticsHelper.SlotCount(this.database, queryBuilder);
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        SlotSortBuilder<SlotMetadata> sortBuilder = new();
+        sortBuilder.AddSort(new ThumbsUpSort());
+
+        Expression<Func<SlotEntity, SlotMetadata>> selectorFunc = s => new SlotMetadata
+        {
+            Slot = s,
+            ThumbsUp = this.database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),
+        };
+
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder, selectorFunc);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/mostUniquePlays")]
-    public async Task<IActionResult> MostUniquePlaysSlots
-    (
-        [FromQuery] int pageStart,
-        [FromQuery] int pageSize,
-        [FromQuery] int players,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] string? dateFilterType = null,
-        [FromQuery] bool crosscontrol = false
-    )
+    public async Task<IActionResult> MostUniquePlaysSlots()
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        string game = getGameFilter(gameFilterType, token.GameVersion) switch
-        {
-            GameVersion.LittleBigPlanet1 => "LBP1",
-            GameVersion.LittleBigPlanet2 => "LBP2",
-            GameVersion.LittleBigPlanet3 => "LBP3",
-            GameVersion.LittleBigPlanetVita => "LBP2",
-            _ => "",
-        };
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
 
-        string colName = $"Plays{game}Unique";
+        pageData.TotalElements = await StatisticsHelper.SlotCount(this.database, queryBuilder);
 
-        List<SlotBase> slots = this.filterSlots((await this.filterByRequest(gameFilterType, dateFilterType, token.GameVersion)
-            .Where(s => s.CrossControllerRequired == crosscontrol)
-            .OrderByDescending(s => EF.Property<int>(s, colName))
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()), players, labelFilter0, labelFilter1, labelFilter2, move).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        SlotSortBuilder<SlotEntity> sortBuilder = new();
+        sortBuilder.AddSort(new UniquePlaysForGameSort(token.GameVersion));
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = await StatisticsHelper.SlotCountForGame(this.database, token.GameVersion);
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder);
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 
     [HttpGet("slots/mostHearted")]
-    public async Task<IActionResult> MostHeartedSlots
-    (
-        [FromQuery] int pageStart,
-        [FromQuery] int pageSize,
-        [FromQuery] int players,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] string? dateFilterType = null,
-        [FromQuery] bool crosscontrol = false
-    )
+    public async Task<IActionResult> MostHeartedSlots()
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
-        List<SlotBase> slots = this.filterSlots((await this.filterByRequest(gameFilterType, dateFilterType, token.GameVersion)
-            .Where(s => s.CrossControllerRequired == crosscontrol)
-            .Select(s => new SlotMetadata
-            {
-                Slot = s,
-                Hearts = this.database.HeartedLevels.Count(r => r.SlotId == s.SlotId),
-            })
-            .OrderByDescending(s => s.Hearts)
-            .Select(s => s.Slot)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .ToListAsync()), players, labelFilter0, labelFilter1, labelFilter2, move).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
 
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = await StatisticsHelper.SlotCountForGame(this.database, token.GameVersion);
+        pageData.TotalElements = await StatisticsHelper.SlotCount(this.database, queryBuilder);
 
-        return this.Ok(new GenericSlotResponse(slots, total, start));
+        SlotSortBuilder<SlotMetadata> sortBuilder = new();
+        sortBuilder.AddSort(new HeartsSort());
+
+        Expression<Func<SlotEntity, SlotMetadata>> selectorFunc = s => new SlotMetadata
+        {
+            Slot = s,
+            Hearts = this.database.HeartedLevels.Count(r => r.SlotId == s.SlotId),
+        };
+
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, sortBuilder, selectorFunc);
+
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
     
     // /slots/busiest?pageStart=1&pageSize=30&gameFilterType=both&players=1&move=true
     [HttpGet("slots/busiest")]
-    public async Task<IActionResult> BusiestLevels
-    (
-        [FromQuery] int pageStart,
-        [FromQuery] int pageSize,
-        [FromQuery] string? gameFilterType = null,
-        [FromQuery] int players = 1,
-        [FromQuery] string? labelFilter0 = null,
-        [FromQuery] string? labelFilter1 = null,
-        [FromQuery] string? labelFilter2 = null,
-        [FromQuery] string? move = null,
-        [FromQuery] bool crosscontrol = false
-    )
+    public async Task<IActionResult> BusiestLevels()
     {
         GameTokenEntity token = this.GetToken();
 
-        if (pageSize <= 0) return this.BadRequest();
+        PaginationData pageData = this.Request.GetPaginationData();
 
         Dictionary<int, int> playersBySlotId = new();
 
@@ -484,98 +365,15 @@ public class SlotsController : ControllerBase
             playersBySlotId.Add(room.Slot.SlotId, playerCount);
         }
 
-        IEnumerable<int> orderedPlayersBySlotId = playersBySlotId
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 30))
-            .OrderByDescending(kvp => kvp.Value)
-            .Select(kvp => kvp.Key);
+        pageData.TotalElements = playersBySlotId.Count;
 
-        List<SlotEntity> slots = new();
+        List<int> orderedPlayersBySlotId = playersBySlotId.OrderByDescending(kvp => kvp.Value).Select(kvp => kvp.Key).ToList();
 
-        foreach (int slotId in orderedPlayersBySlotId)
-        {
-            SlotEntity? slot = await this.database.Slots.ByGameVersion(token.GameVersion, false, true)
-                .Where(s => s.SlotId == slotId && s.CrossControllerRequired == crosscontrol)
-                .FirstOrDefaultAsync();
-            if (slot == null) continue; // shouldn't happen ever unless the room is borked
+        SlotQueryBuilder queryBuilder = this.FilterFromRequest(token);
+        queryBuilder.AddFilter(0, new SlotIdFilter(orderedPlayersBySlotId));
 
-            slots.Add(slot);
-        }
+        List<SlotBase> slots = await this.database.GetSlots(token, queryBuilder, pageData, new SlotSortBuilder<SlotEntity>());
 
-        slots = this.filterSlots(slots, players, labelFilter0, labelFilter1, labelFilter2, move);
-
-        int start = pageStart + Math.Min(pageSize, ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots);
-        int total = playersBySlotId.Count;
-
-        return this.Ok(new GenericSlotResponse(slots.ToSerializableList(s => SlotBase.CreateFromEntity(s, token)), total, start));
-    }
-
-    private List<SlotEntity> filterSlots(List<SlotEntity> slots, int players, string? labelFilter0 = null, string? labelFilter1 = null, string? labelFilter2 = null, string? move = null) 
-    {
-        slots.RemoveAll(s => s.MinimumPlayers != players);
-
-        if (labelFilter0 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter0));
-        if (labelFilter1 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter1));
-        if (labelFilter2 != null)
-            slots.RemoveAll(s => !s.AuthorLabels.Split(',').ToList().Contains(labelFilter2));
-
-        if (move == "false")
-            slots.RemoveAll(s => s.MoveRequired);
-        if (move == "only")
-            slots.RemoveAll(s => !s.MoveRequired);
-
-        return slots;
-    }
-
-    private static GameVersion getGameFilter(string? gameFilterType, GameVersion version)
-    {
-        return version switch
-        {
-            GameVersion.LittleBigPlanetVita => GameVersion.LittleBigPlanetVita,
-            GameVersion.LittleBigPlanetPSP => GameVersion.LittleBigPlanetPSP,
-            _ => gameFilterType switch
-            {
-                "lbp1" => GameVersion.LittleBigPlanet1,
-                "lbp2" => GameVersion.LittleBigPlanet2,
-                "lbp3" => GameVersion.LittleBigPlanet3,
-                "both" => GameVersion.LittleBigPlanet2, // LBP2 default option
-                null => GameVersion.LittleBigPlanet1,
-                _ => GameVersion.Unknown,
-            },
-        };
-    }
-
-    private IQueryable<SlotEntity> filterByRequest(string? gameFilterType, string? dateFilterType, GameVersion version)
-    {
-        if (version == GameVersion.LittleBigPlanetVita || version == GameVersion.LittleBigPlanetPSP || version == GameVersion.Unknown)
-        {
-            return this.database.Slots.ByGameVersion(version, false, true);
-        }
-
-        string _dateFilterType = dateFilterType ?? "";
-
-        long oldestTime = _dateFilterType switch
-        {
-            "thisWeek" => DateTimeOffset.Now.AddDays(-7).ToUnixTimeMilliseconds(),
-            "thisMonth" => DateTimeOffset.Now.AddDays(-31).ToUnixTimeMilliseconds(),
-            _ => 0,
-        };
-
-        GameVersion gameVersion = getGameFilter(gameFilterType, version);
-
-        IQueryable<SlotEntity> whereSlots;
-
-        // ReSharper disable once ConvertIfStatementToConditionalTernaryExpression
-        if (gameFilterType == "both")
-            // Get game versions less than the current version
-            // Needs support for LBP3 ("both" = LBP1+2)
-            whereSlots = this.database.Slots.Where(s => s.Type == SlotType.User && !s.Hidden && s.GameVersion <= gameVersion && s.FirstUploaded >= oldestTime);
-        else
-            // Get game versions exactly equal to gamefiltertype
-            whereSlots = this.database.Slots.Where(s => s.Type == SlotType.User && !s.Hidden && s.GameVersion == gameVersion && s.FirstUploaded >= oldestTime);
-
-        return whereSlots.Include(s => s.Creator);
+        return this.Ok(new GenericSlotResponse(slots, pageData));
     }
 }

ProjectLighthouse.Servers.GameServer/Controllers/StatisticsController.cs

@@ -3,8 +3,10 @@ using LBPUnion.ProjectLighthouse.Helpers;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
-using LBPUnion.ProjectLighthouse.Types.Users;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;
 
@@ -14,7 +16,6 @@ namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;
 [Produces("text/plain")]
 public class StatisticsController : ControllerBase
 {
-
     private readonly DatabaseContext database;
 
     public StatisticsController(DatabaseContext database)
@@ -23,7 +24,7 @@ public class StatisticsController : ControllerBase
     }
 
     [HttpGet("playersInPodCount")]
-public IActionResult PlayersInPodCount() => this.Ok(StatisticsHelper.RoomCountForPlatform(this.GetToken().Platform).ToString());
+    public IActionResult PlayersInPodCount() => this.Ok(StatisticsHelper.RoomCountForPlatform(this.GetToken().Platform).ToString());
 
     [HttpGet("totalPlayerCount")]
     public async Task<IActionResult> TotalPlayerCount() => this.Ok((await StatisticsHelper.RecentMatchesForGame(this.database, this.GetToken().GameVersion)).ToString());
@@ -32,12 +33,19 @@ public IActionResult PlayersInPodCount() => this.Ok(StatisticsHelper.RoomCountFo
     [Produces("text/xml")]
     public async Task<IActionResult> PlanetStats()
     {
-        int totalSlotCount = await StatisticsHelper.SlotCountForGame(this.database, this.GetToken().GameVersion);
-        int mmPicksCount = await StatisticsHelper.TeamPickCountForGame(this.database, this.GetToken().GameVersion);
+        SlotQueryBuilder defaultFilter = this.GetDefaultFilters(this.GetToken());
+        int totalSlotCount = await StatisticsHelper.SlotCount(this.database, defaultFilter);
+        defaultFilter.AddFilter(new TeamPickFilter());
+        int mmPicksCount = await StatisticsHelper.SlotCount(this.database, defaultFilter);
 
         return this.Ok(new PlanetStatsResponse(totalSlotCount, mmPicksCount));
     }
 
     [HttpGet("planetStats/totalLevelCount")]
-    public async Task<IActionResult> TotalLevelCount() => this.Ok((await StatisticsHelper.SlotCountForGame(this.database, this.GetToken().GameVersion)).ToString());
+    public async Task<IActionResult> TotalLevelCount()
+    {
+        SlotQueryBuilder defaultFilter = this.GetDefaultFilters(this.GetToken());
+        int totalSlotCount = await StatisticsHelper.SlotCount(this.database, defaultFilter);
+        return this.Ok(totalSlotCount.ToString());
+    }
 }

ProjectLighthouse.Servers.GameServer/Extensions/ControllerExtensions.cs

@@ -0,0 +1,183 @@
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Users;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Primitives;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
+
+public static class ControllerExtensions
+{
+    private static GameVersion GetGameFilter(string? gameFilterType, GameVersion version)
+    {
+        return version switch
+        {
+            GameVersion.LittleBigPlanetVita => GameVersion.LittleBigPlanetVita,
+            GameVersion.LittleBigPlanetPSP => GameVersion.LittleBigPlanetPSP,
+            _ => gameFilterType switch
+            {
+                "lbp1" => GameVersion.LittleBigPlanet1,
+                "lbp2" => GameVersion.LittleBigPlanet2,
+                "lbp3" => GameVersion.LittleBigPlanet3,
+                "both" => GameVersion.LittleBigPlanet2, // LBP2 default option
+                null => GameVersion.LittleBigPlanet1,
+                _ => GameVersion.Unknown,
+            },
+        };
+    }
+
+    public static SlotQueryBuilder GetDefaultFilters(this ControllerBase controller, GameTokenEntity token) =>
+        new SlotQueryBuilder().AddFilter(new GameVersionFilter(token.GameVersion))
+            .AddFilter(new SubLevelFilter(token.UserId))
+            .AddFilter(new HiddenSlotFilter())
+            .AddFilter(new SlotTypeFilter(SlotType.User));
+
+    public static SlotQueryBuilder FilterFromRequest(this ControllerBase controller, GameTokenEntity token)
+    {
+        SlotQueryBuilder queryBuilder = new();
+
+        List<string> authorLabels = new();
+        for (int i = 0; i < 3; i++)
+        {
+            string? label = controller.Request.Query[$"labelFilter{i}"];
+            if (label == null) continue;
+            authorLabels.Add(label);
+        }
+
+        if (authorLabels.Count > 0) queryBuilder.AddFilter(new AuthorLabelFilter(authorLabels.ToArray()));
+
+        if (int.TryParse(controller.Request.Query["players"], out int minPlayers) && minPlayers >= 1)
+        {
+            // LBP3 starts counting at 0
+            if (token.GameVersion == GameVersion.LittleBigPlanet3) minPlayers++;
+
+            queryBuilder.AddFilter(new PlayerCountFilter(minPlayers));
+        }
+
+        if (controller.Request.Query.ContainsKey("textFilter"))
+        {
+            string textFilter = (string?)controller.Request.Query["textFilter"] ?? "";
+
+            if (!string.IsNullOrWhiteSpace(textFilter)) queryBuilder.AddFilter(new TextFilter(textFilter));
+        }
+
+        if (controller.Request.Query.ContainsKey("dateFilterType"))
+        {
+            string dateFilter = (string?)controller.Request.Query["dateFilterType"] ?? "";
+            long oldestTime = dateFilter switch
+            {
+                "thisWeek" => DateTimeOffset.UtcNow.AddDays(-7).ToUnixTimeMilliseconds(),
+                "thisMonth" => DateTimeOffset.UtcNow.AddDays(-31).ToUnixTimeMilliseconds(),
+                _ => 0,
+            };
+            if (oldestTime != 0) queryBuilder.AddFilter(new FirstUploadedFilter(oldestTime));
+        }
+
+        if (token.GameVersion != GameVersion.LittleBigPlanet3)
+        {
+            if (controller.Request.Query.ContainsKey("move"))
+            {
+                string moveFilter = (string?)controller.Request.Query["move"] ?? "";
+                // By default this will include levels with move so we don't handle true
+                switch (moveFilter)
+                {
+                    case "false": 
+                        queryBuilder.AddFilter(new ExcludeMovePackFilter());
+                        break;
+                    case "only": 
+                        queryBuilder.AddFilter(new MovePackFilter());
+                        break;
+                }
+            }
+
+            if (bool.TryParse(controller.Request.Query["move"], out bool movePack) && !movePack)
+                queryBuilder.AddFilter(new ExcludeMovePackFilter());
+
+            if (bool.TryParse(controller.Request.Query["crosscontrol"], out bool crossControl) && crossControl)
+                queryBuilder.AddFilter(new CrossControlFilter());
+
+            GameVersion targetVersion = token.GameVersion;
+
+            if (controller.Request.Query.ContainsKey("gameFilterType"))
+            {
+                string gameFilter = (string?)controller.Request.Query["gameFilterType"] ?? "";
+                GameVersion filterVersion = GetGameFilter(gameFilter, targetVersion);
+                // Don't serve lbp3 levels to lbp2 just cause of the game filter
+                if (filterVersion <= targetVersion)
+                {
+                    targetVersion = filterVersion;
+                }
+            }
+            queryBuilder.AddFilter(new GameVersionFilter(targetVersion));
+        } 
+        else if (token.GameVersion == GameVersion.LittleBigPlanet3)
+        {
+            void ParseLbp3Query(string key, Action allMust, Action noneCan, Action dontCare)
+            {
+                if (!controller.Request.Query.ContainsKey(key)) return;
+
+                string value = (string?)controller.Request.Query[key] ?? "dontCare";
+                switch (value)
+                {
+                    case "allMust":
+                        allMust();
+                        break;
+                    case "noneCan":
+                        noneCan();
+                        break;
+                    case "dontCare":
+                        dontCare();
+                        break;
+                }
+            }
+
+            ParseLbp3Query("adventure",
+                () => queryBuilder.AddFilter(new AdventureFilter()),
+                () => queryBuilder.AddFilter(new ExcludeAdventureFilter()),
+                () =>
+                { });
+
+            ParseLbp3Query("move",
+                () => queryBuilder.AddFilter(new MovePackFilter()),
+                () => queryBuilder.AddFilter(new ExcludeMovePackFilter()),
+                () =>
+                { });
+
+            string[]? ParseLbp3ArrayQuery(string key)
+            {
+                return !controller.Request.Query.TryGetValue($"{key}[]", out StringValues keys)
+                    ? null
+                    : keys.Where(s => s != null).Select(s => s!).ToArray();
+            }
+
+            string[]? gameFilters = ParseLbp3ArrayQuery("gameFilter");
+            if (gameFilters != null)
+            {
+                queryBuilder.AddFilter(new GameVersionListFilter(gameFilters
+                    .Select(s => GetGameFilter(s, token.GameVersion))
+                    .ToArray()));
+            }
+            else
+            {
+                queryBuilder.AddFilter(new GameVersionFilter(GameVersion.LittleBigPlanet3));
+            }
+
+            string[]? resultFilters = ParseLbp3ArrayQuery("resultType");
+            if (resultFilters != null)
+            {
+                queryBuilder.AddFilter(new ResultTypeFilter(resultFilters));
+            }
+        }
+
+        if (token.GameVersion != GameVersion.LittleBigPlanet1)
+            queryBuilder.AddFilter(new ExcludeLBP1OnlyFilter(token.UserId, token.GameVersion));
+
+        queryBuilder.AddFilter(new SubLevelFilter(token.UserId));
+        queryBuilder.AddFilter(new HiddenSlotFilter());
+        queryBuilder.AddFilter(new SlotTypeFilter(SlotType.User));
+
+        return queryBuilder;
+    }
+}

ProjectLighthouse.Servers.GameServer/Extensions/DatabaseContextExtensions.cs

@@ -0,0 +1,59 @@
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Types.Misc;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
+
+public static class DatabaseContextExtensions
+{
+    public static async Task<List<SlotBase>> GetSlots
+    (
+        this IQueryable<SlotEntity> queryable,
+        GameTokenEntity token,
+        SlotQueryBuilder queryBuilder,
+        PaginationData pageData,
+        ISortBuilder<SlotEntity> sortBuilder
+    ) =>
+        (await queryable.Where(queryBuilder.Build())
+            .ApplyOrdering(sortBuilder)
+            .ApplyPagination(pageData)
+            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+
+    public static async Task<List<SlotBase>> GetSlots
+    (
+        this DatabaseContext database,
+        GameTokenEntity token,
+        SlotQueryBuilder queryBuilder,
+        PaginationData pageData,
+        ISortBuilder<SlotEntity> sortBuilder
+    ) =>
+        (await database.Slots.Where(queryBuilder.Build())
+            .ApplyOrdering(sortBuilder)
+            .ApplyPagination(pageData)
+            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+
+    public static async Task<List<SlotBase>> GetSlots
+    (
+        this DatabaseContext database,
+        GameTokenEntity token,
+        SlotQueryBuilder queryBuilder,
+        PaginationData pageData,
+        ISortBuilder<SlotMetadata> sortBuilder,
+        Expression<Func<SlotEntity, SlotMetadata>> selectorFunction
+    ) =>
+        (await database.Slots.Where(queryBuilder.Build())
+            .AsQueryable()
+            .Select(selectorFunction)
+            .ApplyOrdering(sortBuilder)
+            .Select(s => s.Slot)
+            .ApplyPagination(pageData)
+            .ToListAsync()).ToSerializableList(s => SlotBase.CreateFromEntity(s, token));
+}

ProjectLighthouse.Servers.GameServer/Types/Categories/CategoryHelper.cs

@@ -15,6 +15,8 @@ public static class CategoryHelper
         Categories.Add(new NewestLevelsCategory());
         Categories.Add(new MostPlayedCategory());
         Categories.Add(new HighestRatedCategory());
+        Categories.Add(new MyHeartedCreatorsCategory());
+        Categories.Add(new MyPlaylistsCategory());
         Categories.Add(new QueueCategory());
         Categories.Add(new HeartedCategory());
         Categories.Add(new LuckyDipCategory());

ProjectLighthouse.Servers.GameServer/Types/Categories/CategoryWithUser.cs

@@ -1,62 +0,0 @@
-#nullable enable
-using System.Diagnostics;
-using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Logging;
-using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Logging;
-using LBPUnion.ProjectLighthouse.Types.Serialization;
-using LBPUnion.ProjectLighthouse.Types.Users;
-
-namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
-
-public abstract class CategoryWithUser : Category
-{
-    public abstract SlotEntity? GetPreviewSlot(DatabaseContext database, UserEntity user);
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database)
-    {
-        #if DEBUG
-        Logger.Error("tried to get preview slot without user on CategoryWithUser", LogArea.Category);
-        if (Debugger.IsAttached) Debugger.Break();
-        #endif
-        return null;
-    }
-
-    public abstract int GetTotalSlots(DatabaseContext database, UserEntity user);
-    public override int GetTotalSlots(DatabaseContext database)
-    {
-        #if DEBUG
-        Logger.Error("tried to get total slots without user on CategoryWithUser", LogArea.Category);
-        if (Debugger.IsAttached) Debugger.Break();
-        #endif
-        return -1;
-    }
-
-    public abstract IQueryable<SlotEntity> GetSlots(DatabaseContext database, UserEntity user, int pageStart, int pageSize);
-    public override IList<SlotEntity> GetSlots(DatabaseContext database, int pageStart, int pageSize)
-    {
-        #if DEBUG
-        Logger.Error("tried to get slots without user on CategoryWithUser", LogArea.Category);
-        if (Debugger.IsAttached) Debugger.Break();
-        #endif
-        return new List<SlotEntity>();
-    }
-
-    public new string Serialize(DatabaseContext database)
-    {
-        Logger.Error("tried to serialize without user on CategoryWithUser", LogArea.Category);
-        return string.Empty;
-    }
-
-    public GameCategory Serialize(DatabaseContext database, UserEntity user)
-    {
-        List<SlotBase> slots = new();
-        SlotEntity? previewSlot = this.GetPreviewSlot(database, user);
-        if (previewSlot != null)
-            slots.Add(SlotBase.CreateFromEntity(previewSlot, GameVersion.LittleBigPlanet3, user.UserId));
-        
-        int totalSlots = this.GetTotalSlots(database, user);
-        return GameCategory.CreateFromEntity(this, new GenericSlotResponse(slots, totalSlots, 2));
-    }
-}

ProjectLighthouse.Servers.GameServer/Types/Categories/CustomCategory.cs

@@ -1,16 +1,15 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class CustomCategory : Category
+public class CustomCategory : SlotCategory
 {
-
-    public List<int> SlotIds;
+    private readonly List<int> slotIds;
     public CustomCategory(string name, string description, string endpoint, string icon, IEnumerable<int> slotIds)
     {
         this.Name = name;
@@ -18,7 +17,7 @@ public class CustomCategory : Category
         this.IconHash = icon;
         this.Endpoint = endpoint;
 
-        this.SlotIds = slotIds.ToList();
+        this.slotIds = slotIds.ToList();
     }
 
     public CustomCategory(DatabaseCategoryEntity category)
@@ -28,16 +27,19 @@ public class CustomCategory : Category
         this.IconHash = category.IconHash;
         this.Endpoint = category.Endpoint;
 
-        this.SlotIds = category.SlotIds.ToList();
+        this.slotIds = category.SlotIds.ToList();
     }
 
     public sealed override string Name { get; set; }
     public sealed override string Description { get; set; }
     public sealed override string IconHash { get; set; }
     public sealed override string Endpoint { get; set; }
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database) => database.Slots.FirstOrDefault(s => s.SlotId == this.SlotIds[0] && !s.CrossControllerRequired);
-    public override IQueryable<SlotEntity> GetSlots
-        (DatabaseContext database, int pageStart, int pageSize)
-        => database.Slots.ByGameVersion(GameVersion.LittleBigPlanet3).Where(s => this.SlotIds.Contains(s.SlotId) && !s.CrossControllerRequired);
-    public override int GetTotalSlots(DatabaseContext database) => this.SlotIds.Count;
+
+    public override string Tag => "custom_category";
+
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity entity, SlotQueryBuilder queryBuilder)
+    {
+        queryBuilder.Clone().AddFilter(new SlotIdFilter(this.slotIds));
+        return database.Slots.Where(queryBuilder.Build());
+    }
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/HeartedCategory.cs

@@ -1,38 +1,22 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
-using Microsoft.EntityFrameworkCore;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class HeartedCategory : CategoryWithUser
+public class HeartedCategory : SlotCategory
 {
     public override string Name { get; set; } = "My Hearted Content";
     public override string Description { get; set; } = "Content you've hearted";
     public override string IconHash { get; set; } = "g820611";
-    public override string Endpoint { get; set; } = "hearted";
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database, UserEntity user) // note: developer slots act up in LBP3 when listed here, so I omitted it
-        => database.HeartedLevels.Where(h => h.UserId == user.UserId)
-            .Where(h => h.Slot.Type == SlotType.User && !h.Slot.Hidden && h.Slot.GameVersion <= GameVersion.LittleBigPlanet3 && !h.Slot.CrossControllerRequired)
-            .OrderByDescending(h => h.HeartedLevelId)
-            .Include(h => h.Slot.Creator)
-            .Select(h => h.Slot)
-            .ByGameVersion(GameVersion.LittleBigPlanet3, false, false, true)
-            .FirstOrDefault();
+    public override string Endpoint { get; set; } = "hearted_levels";
+    public override string Tag => "my_hearted_levels";
 
-    public override IQueryable<SlotEntity> GetSlots(DatabaseContext database, UserEntity user, int pageStart, int pageSize)
-        => database.HeartedLevels.Where(h => h.UserId == user.UserId)
-            .Where(h => h.Slot.Type == SlotType.User && !h.Slot.Hidden && h.Slot.GameVersion <= GameVersion.LittleBigPlanet3 && !h.Slot.CrossControllerRequired)
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.HeartedLevels.Where(h => h.UserId == token.UserId)
             .OrderByDescending(h => h.HeartedLevelId)
-            .Include(h => h.Slot.Creator)
             .Select(h => h.Slot)
-            .ByGameVersion(GameVersion.LittleBigPlanet3, false, false, true)
-            .Skip(Math.Max(0, pageStart))
-            .Take(Math.Min(pageSize, 20));
-
-    public override int GetTotalSlots(DatabaseContext database, UserEntity user) => database.HeartedLevels.Count(h => h.UserId == user.UserId);
+            .Where(queryBuilder.Build());
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/HighestRatedCategory.cs

@@ -1,43 +1,27 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 using LBPUnion.ProjectLighthouse.Types.Misc;
-using LBPUnion.ProjectLighthouse.Types.Users;
-using Microsoft.EntityFrameworkCore;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class HighestRatedCategory : Category
+public class HighestRatedCategory : SlotCategory
 {
     public override string Name { get; set; } = "Highest Rated";
     public override string Description { get; set; } = "Community Highest Rated content";
     public override string IconHash { get; set; } = "g820603";
     public override string Endpoint { get; set; } = "thumbs";
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database) =>
-        database.Slots.Where(s => s.Type == SlotType.User && !s.CrossControllerRequired)
-            .Select(s => new SlotMetadata
-            {
-                Slot = s,
-                ThumbsUp = database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),
-            })
-            .OrderByDescending(s => s.ThumbsUp)
-            .Select(s => s.Slot)
-            .FirstOrDefault();
+    public override string Tag => "highest_rated";
 
-    public override IEnumerable<SlotEntity> GetSlots(DatabaseContext database, int pageStart, int pageSize) =>
-        database.Slots.ByGameVersion(GameVersion.LittleBigPlanet3, false, true)
-            .Where(s => !s.CrossControllerRequired)
-            .Select(s => new SlotMetadata
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.Slots.Select(s => new SlotMetadata
             {
                 Slot = s,
                 ThumbsUp = database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),
             })
             .OrderByDescending(s => s.ThumbsUp)
-            .ThenBy(_ => EF.Functions.Random())
             .Select(s => s.Slot)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 20));
-    public override int GetTotalSlots(DatabaseContext database) => database.Slots.Count(s => s.Type == SlotType.User);
+            .Where(queryBuilder.Build());
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/LuckyDipCategory.cs

@@ -1,26 +1,22 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Sorts;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
-using Microsoft.EntityFrameworkCore;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class LuckyDipCategory : Category
+public class LuckyDipCategory : SlotCategory
 {
     public override string Name { get; set; } = "Lucky Dip";
     public override string Description { get; set; } = "A random selection of content";
     public override string IconHash { get; set; } = "g820605";
-    public override string Endpoint { get; set; } = "lbp2luckydip";
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database) => database.Slots.Where(s => s.Type == SlotType.User && !s.CrossControllerRequired).OrderByDescending(_ => EF.Functions.Random()).FirstOrDefault();
-    public override IQueryable<SlotEntity> GetSlots
-        (DatabaseContext database, int pageStart, int pageSize)
-        => database.Slots.ByGameVersion(GameVersion.LittleBigPlanet3, false, true)
-            .Where(s => !s.CrossControllerRequired)
-            .OrderByDescending(_ => EF.Functions.Random())
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 20));
-    public override int GetTotalSlots(DatabaseContext database) => database.Slots.Count(s => s.Type == SlotType.User);
+    public override string Endpoint { get; set; } = "lucky_dip";
+    public override string Tag => "lucky_dip";
+
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.Slots.Where(queryBuilder.Build())
+            .ApplyOrdering(new SlotSortBuilder<SlotEntity>().AddSort(new FirstUploadedSort()));
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/MostHeartedCategory.cs

@@ -1,42 +1,29 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Sorts.Metadata;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 using LBPUnion.ProjectLighthouse.Types.Misc;
-using LBPUnion.ProjectLighthouse.Types.Users;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class MostHeartedCategory : Category
+public class MostHeartedCategory : SlotCategory
 {
     public override string Name { get; set; } = "Most Hearted";
     public override string Description { get; set; } = "The Most Hearted Content";
     public override string IconHash { get; set; } = "g820607";
-    public override string Endpoint { get; set; } = "mostHearted";
+    public override string Endpoint { get; set; } = "most_hearted";
+    public override string Tag => "most_hearted";
 
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database) =>
-        database.Slots.Where(s => s.Type == SlotType.User && !s.CrossControllerRequired)
-            .Select(s => new SlotMetadata
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.Slots.Select(s => new SlotMetadata
             {
                 Slot = s,
                 Hearts = database.HeartedLevels.Count(r => r.SlotId == s.SlotId),
             })
-            .OrderByDescending(s => s.Hearts)
+            .ApplyOrdering(new SlotSortBuilder<SlotMetadata>().AddSort(new HeartsSort()))
             .Select(s => s.Slot)
-            .FirstOrDefault();
-
-    public override IEnumerable<SlotEntity> GetSlots(DatabaseContext database, int pageStart, int pageSize) =>
-        database.Slots.ByGameVersion(GameVersion.LittleBigPlanet3, false, true)
-            .Where(s => !s.CrossControllerRequired)
-            .Select(s => new SlotMetadata
-            {
-                Slot = s,
-                Hearts = database.HeartedLevels.Count(r => r.SlotId == s.SlotId),
-            })
-            .OrderByDescending(s => s.Hearts)
-            .Select(s => s.Slot)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 20));
-    public override int GetTotalSlots(DatabaseContext database) => database.Slots.Count(s => s.Type == SlotType.User);
+            .Where(queryBuilder.Build());
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/MostPlayedCategory.cs

@@ -1,30 +1,21 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class MostPlayedCategory : Category
+public class MostPlayedCategory : SlotCategory
 {
     public override string Name { get; set; } = "Most Played";
     public override string Description { get; set; } = "The most played content";
     public override string IconHash { get; set; } = "g820608";
-    public override string Endpoint { get; set; } = "mostUniquePlays";
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database) => database.Slots
-        .Where(s => s.Type == SlotType.User && !s.CrossControllerRequired)
-        .OrderByDescending(s => s.PlaysLBP1Unique + s.PlaysLBP2Unique + s.PlaysLBP3Unique)
-        .ThenByDescending(s => s.PlaysLBP1 + s.PlaysLBP2 + s.PlaysLBP3)
-        .FirstOrDefault();
-    public override IQueryable<SlotEntity> GetSlots
-        (DatabaseContext database, int pageStart, int pageSize)
-        => database.Slots.ByGameVersion(GameVersion.LittleBigPlanet3, false, true)
-            .Where(s => !s.CrossControllerRequired)
+    public override string Endpoint { get; set; } = "most_played";
+    public override string Tag => "most_played";
+
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.Slots.Where(queryBuilder.Build())
             .OrderByDescending(s => s.PlaysLBP1Unique + s.PlaysLBP2Unique + s.PlaysLBP3Unique)
-            .ThenByDescending(s => s.PlaysLBP1 + s.PlaysLBP2 + s.PlaysLBP3)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 20));
-    public override int GetTotalSlots(DatabaseContext database) => database.Slots.Count(s => s.Type == SlotType.User);
+            .ThenByDescending(s => s.PlaysLBP1 + s.PlaysLBP2 + s.PlaysLBP3);
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/MyHeartedCreatorsCategory.cs

@@ -0,0 +1,21 @@
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
+
+public class MyHeartedCreatorsCategory : UserCategory
+{
+    public override string Name { get; set; } = "My Hearted Creators";
+    public override string Description { get; set; } = "Creators you've hearted";
+    public override string IconHash { get; set; } = "g820612";
+    public override string Endpoint { get; set; } = "favourite_creators";
+    public override string Tag => "favourite_creators";
+
+    public override IQueryable<UserEntity> GetItems(DatabaseContext database, GameTokenEntity token) =>
+        database.HeartedProfiles.Where(h => h.UserId == token.UserId)
+            .OrderByDescending(h => h.UserId)
+            .Include(h => h.HeartedUser)
+            .Select(h => h.HeartedUser);
+}

ProjectLighthouse.Servers.GameServer/Types/Categories/NewestLevelsCategory.cs

@@ -1,25 +1,22 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Sorts;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class NewestLevelsCategory : Category
+public class NewestLevelsCategory : SlotCategory
 {
     public override string Name { get; set; } = "Newest Levels";
     public override string Description { get; set; } = "The most recently published content";
     public override string IconHash { get; set; } = "g820623";
     public override string Endpoint { get; set; } = "newest";
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database) => database.Slots.Where(s => s.Type == SlotType.User && !s.CrossControllerRequired).OrderByDescending(s => s.FirstUploaded).FirstOrDefault();
-    public override IQueryable<SlotEntity> GetSlots
-        (DatabaseContext database, int pageStart, int pageSize)
-        => database.Slots.ByGameVersion(GameVersion.LittleBigPlanet3, false, true)
-            .Where(s => !s.CrossControllerRequired)
-            .OrderByDescending(s => s.FirstUploaded)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 20));
-    public override int GetTotalSlots(DatabaseContext database) => database.Slots.Count(s => s.Type == SlotType.User);
+    public override string Tag => "newest";
+
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.Slots.Where(queryBuilder.Build())
+            .ApplyOrdering(new SlotSortBuilder<SlotEntity>().AddSort(new FirstUploadedSort()));
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/PlaylistCategory.cs

@@ -0,0 +1,27 @@
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
+
+public abstract class PlaylistCategory : Category
+{
+    public override string[] Types { get; } = { "playlist", };
+
+    public abstract IQueryable<PlaylistEntity> GetItems(DatabaseContext database, GameTokenEntity token);
+
+    public override async Task<GameCategory> Serialize(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder, int numResults = 1)
+    {
+        List<ILbpSerializable> playlists =
+            (await this.GetItems(database, token).Take(numResults).ToListAsync())
+            .ToSerializableList<PlaylistEntity, ILbpSerializable>(GamePlaylist.CreateFromEntity);
+
+        int totalPlaylists = await this.GetItems(database, token).CountAsync();
+        return GameCategory.CreateFromEntity(this, new GenericSerializableList(playlists, totalPlaylists, numResults + 1));
+    }
+}

ProjectLighthouse.Servers.GameServer/Types/Categories/QueueCategory.cs

@@ -1,38 +1,22 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
-using Microsoft.EntityFrameworkCore;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class QueueCategory : CategoryWithUser
+public class QueueCategory : SlotCategory
 {
     public override string Name { get; set; } = "My Queue";
     public override string Description { get; set; } = "Your queued content";
     public override string IconHash { get; set; } = "g820614";
     public override string Endpoint { get; set; } = "queue";
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database, UserEntity user)
-        => database.QueuedLevels.Where(q => q.UserId == user.UserId)
-            .Where(q => q.Slot.Type == SlotType.User && !q.Slot.Hidden && q.Slot.GameVersion <= GameVersion.LittleBigPlanet3)
-            .OrderByDescending(q => q.QueuedLevelId)
-            .Include(q => q.Slot.Creator)
-            .Select(q => q.Slot)
-            .ByGameVersion(GameVersion.LittleBigPlanet3, false, false, true)
-            .FirstOrDefault();
+    public override string Tag => "my_queue";
 
-    public override IQueryable<SlotEntity> GetSlots(DatabaseContext database, UserEntity user, int pageStart, int pageSize)
-        => database.QueuedLevels.Where(q => q.UserId == user.UserId)
-            .Where(q => q.Slot.Type == SlotType.User && !q.Slot.Hidden && q.Slot.GameVersion <= GameVersion.LittleBigPlanet3)
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.QueuedLevels.Where(q => q.UserId == token.UserId)
             .OrderByDescending(q => q.QueuedLevelId)
-            .Include(q => q.Slot.Creator)
             .Select(q => q.Slot)
-            .ByGameVersion(GameVersion.LittleBigPlanet3, false, false, true)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 20));
-
-    public override int GetTotalSlots(DatabaseContext database, UserEntity user) => database.QueuedLevels.Count(q => q.UserId == user.UserId);
+            .Where(queryBuilder.Build());
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/SlotCategory.cs

@@ -0,0 +1,27 @@
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
+
+public abstract class SlotCategory : Category
+{
+    public override string[] Types { get; } = { "slot", "adventure", };
+
+    public abstract IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder);
+
+    public override async Task<GameCategory> Serialize(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder, int numResults = 1)
+    {
+        List<ILbpSerializable> slots =
+            (await this.GetItems(database, token, queryBuilder).Take(numResults).ToListAsync())
+            .ToSerializableList<SlotEntity, ILbpSerializable>(s => SlotBase.CreateFromEntity(s, token));
+
+        int totalSlots = await this.GetItems(database, token, queryBuilder).CountAsync();
+        return GameCategory.CreateFromEntity(this, new GenericSerializableList(slots, totalSlots, numResults+1));
+    }
+}

ProjectLighthouse.Servers.GameServer/Types/Categories/TeamPicksCategory.cs

@@ -1,25 +1,23 @@
 #nullable enable
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
+using LBPUnion.ProjectLighthouse.Filter.Sorts;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 
 namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
 
-public class TeamPicksCategory : Category
+public class TeamPicksCategory : SlotCategory
 {
     public override string Name { get; set; } = "Team Picks";
     public override string Description { get; set; } = "Community Team Picks";
     public override string IconHash { get; set; } = "g820626";
     public override string Endpoint { get; set; } = "team_picks";
-    public override SlotEntity? GetPreviewSlot(DatabaseContext database) => database.Slots.OrderByDescending(s => s.FirstUploaded).FirstOrDefault(s => s.TeamPick && !s.CrossControllerRequired);
-    public override IQueryable<SlotEntity> GetSlots
-        (DatabaseContext database, int pageStart, int pageSize)
-        => database.Slots.ByGameVersion(GameVersion.LittleBigPlanet3, false, true)
-            .OrderByDescending(s => s.FirstUploaded)
-            .Where(s => s.TeamPick && !s.CrossControllerRequired)
-            .Skip(Math.Max(0, pageStart - 1))
-            .Take(Math.Min(pageSize, 20));
-    public override int GetTotalSlots(DatabaseContext database) => database.Slots.Count(s => s.TeamPick);
+    public override string Tag => "team_picks";
+
+    public override IQueryable<SlotEntity> GetItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder) =>
+        database.Slots.Where(queryBuilder.Clone().AddFilter(new TeamPickFilter()).Build())
+            .ApplyOrdering(new SlotSortBuilder<SlotEntity>().AddSort(new FirstUploadedSort()));
 }

ProjectLighthouse.Servers.GameServer/Types/Categories/UserCategory.cs

@@ -0,0 +1,27 @@
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
+
+public abstract class UserCategory : Category
+{
+    public override string[] Types { get; } = { "user", };
+
+    public abstract IQueryable<UserEntity> GetItems(DatabaseContext database, GameTokenEntity token);
+
+    public override async Task<GameCategory> Serialize(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder, int numResults = 1)
+    {
+        List<ILbpSerializable> users =
+            (await this.GetItems(database, token).Take(numResults).ToListAsync())
+            .ToSerializableList<UserEntity, ILbpSerializable>(GameUser.CreateFromEntity);
+
+        int totalUsers = await this.GetItems(database, token).CountAsync();
+        return GameCategory.CreateFromEntity(this, new GenericSerializableList(users, totalUsers, numResults + 1));
+    }
+}

ProjectLighthouse.Servers.GameServer/Types/MyPlaylistsCategory.cs

@@ -0,0 +1,19 @@
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Types.Categories;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+
+namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Types;
+
+public class MyPlaylistsCategory : PlaylistCategory
+{
+    public override string Name { get; set; } = "My Playlists";
+    public override string Description { get; set; } = "Your playlists";
+    public override string IconHash { get; set; } = "g820613";
+    public override string Endpoint { get; set; } = "my_playlists";
+    public override string Tag => "my_playlists";
+    public override string[] Types { get; } = { "playlist", };
+
+    public override IQueryable<PlaylistEntity> GetItems(DatabaseContext database, GameTokenEntity token) =>
+        database.Playlists.Where(p => p.CreatorId == token.UserId).OrderByDescending(p => p.PlaylistId);
+}

ProjectLighthouse.Servers.Website/Pages/Admin/AdminPanelPage.cshtml.cs

@@ -2,6 +2,7 @@
 using LBPUnion.ProjectLighthouse.Administration.Maintenance;
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Filter;
 using LBPUnion.ProjectLighthouse.Helpers;
 using LBPUnion.ProjectLighthouse.Servers.Website.Pages.Layouts;
 using LBPUnion.ProjectLighthouse.Servers.Website.Types;
@@ -29,7 +30,7 @@ public class AdminPanelPage : BaseLayout
         if (!user.IsAdmin) return this.NotFound();
 
         this.Statistics.Add(new AdminPanelStatistic("Users", await StatisticsHelper.UserCount(this.Database), "/admin/users"));
-        this.Statistics.Add(new AdminPanelStatistic("Slots", await StatisticsHelper.SlotCount(this.Database)));
+        this.Statistics.Add(new AdminPanelStatistic("Slots", await StatisticsHelper.SlotCount(this.Database, new SlotQueryBuilder())));
         this.Statistics.Add(new AdminPanelStatistic("Photos", await StatisticsHelper.PhotoCount(this.Database)));
         this.Statistics.Add(new AdminPanelStatistic("API Keys", await StatisticsHelper.ApiKeyCount(this.Database), "/admin/keys"));
 

ProjectLighthouse.Tests.GameApiTests/Integration/SlotFilterTests.cs

@@ -0,0 +1,234 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using System.Xml.Serialization;
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Serialization;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Startup;
+using LBPUnion.ProjectLighthouse.Tests.Helpers;
+using LBPUnion.ProjectLighthouse.Tests.Integration;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using LBPUnion.ProjectLighthouse.Types.Users;
+using Xunit;
+
+namespace ProjectLighthouse.Tests.GameApiTests.Integration;
+
+[Trait("Category", "Integration")]
+public class SlotFilterTests : LighthouseServerTest<GameServerTestStartup>
+{
+    [Fact]
+    public async Task GetUserSlot_ShouldReturnOk_WhenSlotExists()
+    {
+        DatabaseContext db = await IntegrationHelper.GetIntegrationDatabase();
+
+        db.Users.Add(new UserEntity
+        {
+            UserId = 23,
+        });
+
+        db.Slots.Add(new SlotEntity
+        {
+            SlotId = 23,
+            CreatorId = 23,
+        });
+        await db.SaveChangesAsync();
+
+        LoginResult loginResult = await this.Authenticate();
+        HttpResponseMessage response = await this.AuthenticatedRequest("/LITTLEBIGPLANETPS3_XML/s/user/23", loginResult.AuthTicket);
+
+        const HttpStatusCode expectedStatusCode = HttpStatusCode.OK;
+
+        Assert.Equal(expectedStatusCode, response.StatusCode);
+        string body = await response.Content.ReadAsStringAsync();
+
+        Assert.Contains("<id>23</id>", body);
+    }
+
+    [Fact]
+    public async Task NewestSlots_ShouldReturnSlotsOrderedByTimestampDescending()
+    {
+        DatabaseContext db = await IntegrationHelper.GetIntegrationDatabase();
+
+        for (int i = 1; i <= 100; i++)
+        {
+            db.Users.Add(new UserEntity
+            {
+                UserId = i,
+                Username = $"user{i}",
+            });
+            db.Slots.Add(new SlotEntity
+            {
+                SlotId = i,
+                CreatorId = i,
+                FirstUploaded = i,
+            });
+        }
+        await db.SaveChangesAsync();
+
+        LoginResult loginResult = await this.Authenticate();
+        HttpResponseMessage response =
+            await this.AuthenticatedRequest("/LITTLEBIGPLANETPS3_XML/slots?pageStart=0&pageSize=10", loginResult.AuthTicket);
+
+        const HttpStatusCode expectedStatusCode = HttpStatusCode.OK;
+
+        Assert.Equal(expectedStatusCode, response.StatusCode);
+        string body = await response.Content.ReadAsStringAsync();
+
+        object? deserialized = LighthouseSerializer
+            .GetSerializer(typeof(GameUserSlotList), new XmlRootAttribute("slots"))
+            .Deserialize(new StringReader(body));
+        Assert.NotNull(deserialized);
+        Assert.IsType<GameUserSlotList>(deserialized);
+
+        GameUserSlotList slotResponse = (GameUserSlotList)deserialized;
+
+        Assert.Equal(100, slotResponse.Total);
+        Assert.Equal(10, slotResponse.Slots.Count);
+
+        Assert.Equal(91, slotResponse.Slots[9].FirstUploaded);
+    }
+
+    [Fact]
+    public async Task NewestSlots_ShouldReturnSlotsWithAuthorLabel()
+    {
+        DatabaseContext db = await IntegrationHelper.GetIntegrationDatabase();
+
+        db.Users.Add(new UserEntity()
+        {
+            UserId = 1,
+        });
+
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 1,
+            AuthorLabels = "LABEL_SinglePlayer,LABEL_Quick,LABEL_Funny",
+            FirstUploaded = 1,
+        });
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 2,
+            AuthorLabels = "LABEL_SinglePlayer",
+            FirstUploaded = 2,
+        });
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 3,
+            AuthorLabels = "LABEL_Quick",
+            FirstUploaded = 3,
+        });
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 4,
+            AuthorLabels = "LABEL_Funny",
+            FirstUploaded = 4,
+        });
+
+        await db.SaveChangesAsync();
+
+        LoginResult loginResult = await this.Authenticate();
+        HttpResponseMessage response =
+            await this.AuthenticatedRequest("/LITTLEBIGPLANETPS3_XML/slots?pageStart=0&pageSize=10&labelFilter0=LABEL_Funny",
+                loginResult.AuthTicket);
+
+        const HttpStatusCode expectedStatusCode = HttpStatusCode.OK;
+
+        Assert.Equal(expectedStatusCode, response.StatusCode);
+        string body = await response.Content.ReadAsStringAsync();
+
+        object? deserialized = LighthouseSerializer
+            .GetSerializer(typeof(GameUserSlotList), new XmlRootAttribute("slots"))
+            .Deserialize(new StringReader(body));
+        Assert.NotNull(deserialized);
+        Assert.IsType<GameUserSlotList>(deserialized);
+
+        GameUserSlotList slotResponse = (GameUserSlotList)deserialized;
+
+        const int expectedCount = 2;
+
+        Assert.Equal(expectedCount, slotResponse.Slots.Count);
+        Assert.True(slotResponse.Slots.TrueForAll(s => s.AuthorLabels.Contains("LABEL_Funny")));
+    }
+
+[Fact]
+    public async Task NewestSlots_ShouldReturnEmpty_WhenAuthorLabelsDontMatch()
+    {
+        DatabaseContext db = await IntegrationHelper.GetIntegrationDatabase();
+
+        db.Users.Add(new UserEntity
+        {
+            UserId = 1,
+        });
+
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 1,
+            AuthorLabels = "LABEL_SinglePlayer,LABEL_Quick,LABEL_Funny",
+            FirstUploaded = 1,
+        });
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 2,
+            AuthorLabels = "LABEL_SinglePlayer",
+            FirstUploaded = 2,
+        });
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 3,
+            AuthorLabels = "LABEL_Quick",
+            FirstUploaded = 3,
+        });
+        db.Slots.Add(new SlotEntity
+        {
+            CreatorId = 1,
+            SlotId = 4,
+            AuthorLabels = "LABEL_Funny",
+            FirstUploaded = 4,
+        });
+
+        await db.SaveChangesAsync();
+
+        LoginResult loginResult = await this.Authenticate();
+        HttpResponseMessage response =
+            await this.AuthenticatedRequest("/LITTLEBIGPLANETPS3_XML/slots?pageStart=0&pageSize=10&labelFilter0=LABEL_Funny&labelFilter1=LABEL_Quick&labelFilter2=LABEL_Gallery",
+                loginResult.AuthTicket);
+
+        const HttpStatusCode expectedStatusCode = HttpStatusCode.OK;
+
+        Assert.Equal(expectedStatusCode, response.StatusCode);
+        string body = await response.Content.ReadAsStringAsync();
+
+        object? deserialized = LighthouseSerializer
+            .GetSerializer(typeof(GameUserSlotList), new XmlRootAttribute("slots"))
+            .Deserialize(new StringReader(body));
+        Assert.NotNull(deserialized);
+        Assert.IsType<GameUserSlotList>(deserialized);
+
+        GameUserSlotList slotResponse = (GameUserSlotList)deserialized;
+
+        Assert.Empty(slotResponse.Slots);
+    }
+
+    [XmlRoot("slots")]
+    public class GameUserSlotList
+    {
+        [XmlElement("slot")]
+        public List<GameUserSlot> Slots { get; set; } = new();
+
+        [XmlAttribute("total")]
+        public int Total { get; set; }
+
+        [XmlAttribute("hint_start")]
+        public int HintStart { get; set; }
+    }
+}

ProjectLighthouse.Tests.GameApiTests/Unit/Controllers/ControllerExtensionTests.cs

@@ -0,0 +1,388 @@
+using System.Collections.Generic;
+using System.Linq;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Slots;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Extensions;
+using LBPUnion.ProjectLighthouse.Tests.Helpers;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Users;
+using Microsoft.AspNetCore.Http;
+using Xunit;
+
+namespace ProjectLighthouse.Tests.GameApiTests.Unit.Controllers;
+
+[Trait("Category", "Unit")]
+public class ControllerExtensionTests
+{
+    [Fact]
+    public void GetDefaultFilters_ShouldReturnFilterBuilder()
+    {
+        SlotQueryBuilder queryBuilder = new SlotsController(null!).GetDefaultFilters(MockHelper.GetUnitTestToken());
+
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(GameVersionFilter)));
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(SubLevelFilter)));
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(HiddenSlotFilter)));
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(SlotTypeFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddExcludeLbp1Filter_WhenTokenNotLbp1()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString(),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(ExcludeLBP1OnlyFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldReturnFilters_WhenQueryEmpty()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString(),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(GameVersionFilter)));
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(ExcludeLBP1OnlyFilter)));
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(SubLevelFilter)));
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(HiddenSlotFilter)));
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(SlotTypeFilter)));
+    }
+
+    private static List<ISlotFilter> GetDefaultFilters
+        (SlotQueryBuilder queryBuilder) =>
+        queryBuilder.GetFilters(typeof(GameVersionFilter))
+            .Union(queryBuilder.GetFilters(typeof(SubLevelFilter))
+                .Union(queryBuilder.GetFilters(typeof(HiddenSlotFilter))
+                    .Union(queryBuilder.GetFilters(typeof(SlotTypeFilter)))))
+            .ToList();
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddLabelFilter_WhenAuthorLabelPresent()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?labelFilter0=LABEL_TEST"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(AuthorLabelFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddPlayerCountFilter_WhenPlayersPresent()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?players=1"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(PlayerCountFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddTextFilter_WhenTextFilterPresent()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?textFilter=test"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(TextFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddFirstUploadedFilter_WhenDateFilterPresent()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?dateFilterType=thisWeek"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(FirstUploadedFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddExcludeMoveFilter_WhenMoveEqualsFalse()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?move=false"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(ExcludeMovePackFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddMoveFilter_WhenMoveEqualsOnly()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?move=only"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(MovePackFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddCrossControlFilter_WhenCrossControlEqualsTrue()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet2;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?crosscontrol=true"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(CrossControlFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddAdventureFilter_WhenAdventureEqualsAllMust()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet3;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?adventure=allMust"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(AdventureFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddExcludeAdventureFilter_WhenAdventureEqualsNoneCan()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet3;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?adventure=noneCan"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(ExcludeAdventureFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddMovePackFilter_WhenMoveEqualsAllMust()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet3;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?move=allMust"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(MovePackFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddExcludeMoveFilter_WhenMoveEqualsNoneCan()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet3;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?move=noneCan"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(ExcludeMovePackFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddGameVersionListFilter_WhenGameFilterIsPresent()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet3;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?gameFilter[]=lbp1&gameFilter[]=lbp3"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(GameVersionListFilter)));
+    }
+
+    [Fact]
+    public void FilterFromRequest_ShouldAddResultTypeFilter_WhenResultTypeIsPresent()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet3;
+        SlotsController controller = new(null!)
+        {
+            ControllerContext =
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    Request =
+                    {
+                        QueryString = new QueryString("?resultType[]=slot&resultType[]=playlist"),
+                    },
+                },
+            },
+        };
+
+        SlotQueryBuilder queryBuilder = controller.FilterFromRequest(token);
+        Assert.NotEmpty(queryBuilder.GetFilters(typeof(ResultTypeFilter)));
+    }
+}

ProjectLighthouse.Tests.GameApiTests/Unit/Controllers/MessageControllerTests.cs

@@ -41,11 +41,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\n";
 
         IActionResult result = messageController.Eula();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObjectResult = result as OkObjectResult;
-        Assert.NotNull(okObjectResult);
-        Assert.NotNull(okObjectResult.Value);
-        Assert.Equal(expected, (string)okObjectResult.Value);
+        string eulaMsg = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expected, eulaMsg);
     }
 
     [Fact]
@@ -72,11 +69,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
 
         IActionResult result = messageController.Eula();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObjectResult = result as OkObjectResult;
-        Assert.NotNull(okObjectResult);
-        Assert.NotNull(okObjectResult.Value);
-        Assert.Equal(expected, (string)okObjectResult.Value);
+        string eulaMsg = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expected, eulaMsg);
     }
 
     [Fact]
@@ -92,11 +86,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
 
         IActionResult result = await messageController.Announce();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObjectResult = result as OkObjectResult;
-        Assert.NotNull(okObjectResult);
-        Assert.NotNull(okObjectResult.Value);
-        Assert.Equal(expected, (string)okObjectResult.Value);
+        string announceMsg = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expected, announceMsg);
     }
 
     [Fact]
@@ -112,11 +103,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
 
         IActionResult result = await messageController.Announce();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObjectResult = result as OkObjectResult;
-        Assert.NotNull(okObjectResult);
-        Assert.NotNull(okObjectResult.Value);
-        Assert.Equal(expected, (string)okObjectResult.Value);
+        string announceMsg = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expected, announceMsg);
     }
 
     [Fact]
@@ -147,11 +135,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
 
         IActionResult result = await messageController.Filter(new NullMailService());
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObjectResult = result as OkObjectResult;
-        Assert.NotNull(okObjectResult);
-        Assert.NotNull(okObjectResult.Value);
-        Assert.Equal(expectedBody, (string)okObjectResult.Value);
+        string filteredMessage = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expectedBody, filteredMessage);
     }
 
     [Fact]
@@ -173,11 +158,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
 
         IActionResult result = await messageController.Filter(new NullMailService());
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObjectResult = result as OkObjectResult;
-        Assert.NotNull(okObjectResult);
-        Assert.NotNull(okObjectResult.Value);
-        Assert.Equal(expectedBody, (string)okObjectResult.Value);
+        string filteredMessage = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expectedBody, filteredMessage);
     }
 
     private static Mock<IMailService> getMailServiceMock()
@@ -189,7 +171,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
     }
 
     [Fact]
-    public async void Filter_ShouldNotSendEmail_WhenMailDisabled()
+    public async Task Filter_ShouldNotSendEmail_WhenMailDisabled()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
         Mock<IMailService> mailMock = getMailServiceMock();
@@ -200,20 +182,16 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
         ServerConfiguration.Instance.Mail.MailEnabled = false;
         CensorConfiguration.Instance.FilteredWordList = new List<string>();
 
-        const int expectedStatus = 200;
         const string expected = "/setemail unittest@unittest.com";
 
         IActionResult result = await messageController.Filter(mailMock.Object);
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObjectResult = result as OkObjectResult;
-        Assert.NotNull(okObjectResult);
-        Assert.Equal(expectedStatus, okObjectResult.StatusCode);
-        Assert.Equal(expected, okObjectResult.Value);
+        string filteredMessage = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expected, filteredMessage);
     }
 
     [Fact]
-    public async void Filter_ShouldSendEmail_WhenMailEnabled_AndEmailNotTaken()
+    public async Task Filter_ShouldSendEmail_WhenMailEnabled_AndEmailNotTaken()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
         
@@ -236,7 +214,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
     }
 
     [Fact]
-    public async void Filter_ShouldNotSendEmail_WhenMailEnabled_AndEmailTaken()
+    public async Task Filter_ShouldNotSendEmail_WhenMailEnabled_AndEmailTaken()
     {
         List<UserEntity> users = new()
         {
@@ -265,7 +243,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
     }
 
     [Fact]
-    public async void Filter_ShouldNotSendEmail_WhenMailEnabled_AndEmailAlreadyVerified()
+    public async Task Filter_ShouldNotSendEmail_WhenMailEnabled_AndEmailAlreadyVerified()
     {
         UserEntity unitTestUser = MockHelper.GetUnitTestUser();
         unitTestUser.EmailAddressVerified = true;
@@ -290,7 +268,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>." + "\nuni
     }
 
     [Fact]
-    public async void Filter_ShouldNotSendEmail_WhenMailEnabled_AndEmailFormatInvalid()
+    public async Task Filter_ShouldNotSendEmail_WhenMailEnabled_AndEmailFormatInvalid()
     {
         UserEntity unitTestUser = MockHelper.GetUnitTestUser();
         unitTestUser.EmailAddressVerified = true;

ProjectLighthouse.Tests.GameApiTests/Unit/Controllers/SlotControllerTests.cs

@@ -0,0 +1,380 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers.Slots;
+using LBPUnion.ProjectLighthouse.Tests.Helpers;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using LBPUnion.ProjectLighthouse.Types.Users;
+using Microsoft.AspNetCore.Mvc;
+using Xunit;
+
+namespace ProjectLighthouse.Tests.GameApiTests.Unit.Controllers;
+
+[Trait("Category", "Unit")]
+public class SlotControllerTests
+{
+    #region SlotsBy
+    [Fact]
+    public async Task SlotsBy_ShouldReturnNotFound_WhenUserInvalid()
+    {
+        DatabaseContext db = await MockHelper.GetTestDatabase();
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.SlotsBy("bytest");
+
+        Assert.IsType<NotFoundResult>(result);
+    }
+
+    [Fact]
+    public async Task SlotsBy_ShouldFetchLevelsByUser()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 1,
+                CreatorId = 2,
+            },
+            new SlotEntity
+            {
+                SlotId = 2,
+                CreatorId = 2,
+            },
+            new SlotEntity
+            {
+                SlotId = 3,
+                CreatorId = 3,
+            },
+        };
+        List<UserEntity> users = new()
+        {
+            MockHelper.GetUnitTestUser(),
+            new UserEntity
+            {
+                Username = "bytest",
+                UserId = 2,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new IList[]
+        {
+            slots, users,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.SlotsBy("bytest");
+
+        const int expectedElements = 2;
+
+        GenericSlotResponse slotResponse = result.CastTo<OkObjectResult, GenericSlotResponse>();
+        Assert.Equal(expectedElements, slotResponse.Slots.Count);
+    }
+
+    [Fact]
+    public async Task SlotsBy_ResultsAreOrderedByFirstUploadedTimestampDescending()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 1,
+                CreatorId = 2,
+                FirstUploaded = 3,
+            },
+            new SlotEntity
+            {
+                SlotId = 2,
+                CreatorId = 2,
+                FirstUploaded = 1,
+            },
+            new SlotEntity
+            {
+                SlotId = 3,
+                CreatorId = 2,
+                FirstUploaded = 2,
+            },
+        };
+        List<UserEntity> users = new()
+        {
+            MockHelper.GetUnitTestUser(),
+            new UserEntity
+            {
+                Username = "bytest",
+                UserId = 2,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new IList[]
+        {
+            slots, users,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.SlotsBy("bytest");
+
+        const int expectedElements = 3;
+        const int expectedFirstSlotId = 1;
+        const int expectedSecondSlotId = 3;
+        const int expectedThirdSlotId = 2;
+
+        GenericSlotResponse slotResponse = result.CastTo<OkObjectResult, GenericSlotResponse>();
+        Assert.Equal(expectedElements, slotResponse.Slots.Count);
+
+        Assert.Equal(expectedFirstSlotId, ((GameUserSlot)slotResponse.Slots[0]).SlotId);
+        Assert.Equal(expectedSecondSlotId, ((GameUserSlot)slotResponse.Slots[1]).SlotId);
+        Assert.Equal(expectedThirdSlotId, ((GameUserSlot)slotResponse.Slots[2]).SlotId);
+    }
+    #endregion
+
+    #region UserSlot
+    [Fact]
+    public async Task UserSlot_ShouldFetch_WhenSlotIsValid()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 2,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new[]
+        {
+            slots,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.UserSlot(2);
+
+        Assert.IsType<OkObjectResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldNotFetch_WhenGameVersionMismatch()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 2,
+                GameVersion = GameVersion.LittleBigPlanet2,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new[]
+        {
+            slots,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.UserSlot(2);
+
+        Assert.IsType<NotFoundResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldFetch_WhenGameVersionEqual()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanetVita;
+        List<GameTokenEntity> tokens = new()
+        {
+            token,
+        };
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 2,
+                GameVersion = GameVersion.LittleBigPlanetVita,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new IList[]
+        {
+            slots, tokens,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController(token);
+
+        IActionResult result = await slotsController.UserSlot(2);
+
+        Assert.IsType<OkObjectResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldFetch_WhenGameVersionIsGreater()
+    {
+        GameTokenEntity token = MockHelper.GetUnitTestToken();
+        token.GameVersion = GameVersion.LittleBigPlanet3;
+        List<GameTokenEntity> tokens = new()
+        {
+            token,
+        };
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 2,
+                GameVersion = GameVersion.LittleBigPlanet1,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new IList[]
+        {
+            slots, tokens,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController(token);
+
+        IActionResult result = await slotsController.UserSlot(2);
+
+        Assert.IsType<OkObjectResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldReturnNotFound_WhenSlotDoesNotExist()
+    {
+        DatabaseContext db = await MockHelper.GetTestDatabase();
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.UserSlot(20);
+
+        Assert.IsType<NotFoundResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldFetch_WhenSlotIsNotSubLevel()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 27,
+                CreatorId = 4,
+                SubLevel = false,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new[]
+        {
+            slots,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.UserSlot(27);
+
+        Assert.IsType<OkObjectResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldNotFetch_WhenSlotIsHidden()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 27,
+                CreatorId = 4,
+                Hidden = true,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new[]
+        {
+            slots,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.UserSlot(27);
+
+        Assert.IsType<NotFoundResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldNotFetch_WhenSlotIsWrongType()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 27,
+                Type = SlotType.Developer,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new[]
+        {
+            slots,
+        });
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.UserSlot(27);
+
+        Assert.IsType<NotFoundResult>(result);
+    }
+
+    [Fact]
+    public async Task UserSlot_ShouldNotFetch_WhenSlotIsSubLevel()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 27,
+                CreatorId = 4,
+                SubLevel = true,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new []{slots,});
+        SlotsController slotsController = new(db);
+        slotsController.SetupTestController();
+
+        IActionResult result = await slotsController.UserSlot(27);
+
+        Assert.IsType<NotFoundResult>(result);
+    }
+    #endregion
+
+    #region DeveloperSlot
+    [Fact]
+    public async Task DeveloperSlot_ShouldFetch_WhenSlotIdIsValid()
+    {
+        List<SlotEntity> slots = new()
+        {
+            new SlotEntity
+            {
+                SlotId = 1,
+                InternalSlotId = 25,
+                Type = SlotType.Developer,
+            },
+        };
+        DatabaseContext db = await MockHelper.GetTestDatabase(new[]
+        {
+            slots,
+        });
+        SlotsController controller = new(db);
+        controller.SetupTestController();
+
+        IActionResult result = await controller.DeveloperSlot(25);
+        Assert.IsType<OkObjectResult>(result);
+    }
+
+    [Fact]
+    public async Task DeveloperSlot_ShouldFetch_WhenSlotIdIsInvalid()
+    {
+        DatabaseContext db = await MockHelper.GetTestDatabase();
+        SlotsController controller = new(db);
+        controller.SetupTestController();
+
+        IActionResult result = await controller.DeveloperSlot(26);
+        Assert.IsType<OkObjectResult>(result);
+    }
+    #endregion
+
+}

ProjectLighthouse.Tests.GameApiTests/Unit/Controllers/StatisticsControllerTests.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Threading.Tasks;
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;
 using LBPUnion.ProjectLighthouse.Tests.Helpers;
@@ -14,7 +15,7 @@ namespace ProjectLighthouse.Tests.GameApiTests.Unit.Controllers;
 public class StatisticsControllerTests
 {
     [Fact]
-    public async void PlanetStats_ShouldReturnCorrectCounts_WhenEmpty()
+    public async Task PlanetStats_ShouldReturnCorrectCounts_WhenEmpty()
     {
         await using DatabaseContext db = await MockHelper.GetTestDatabase();
 
@@ -26,17 +27,13 @@ public class StatisticsControllerTests
 
         IActionResult result = await statsController.PlanetStats();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? objectResult = result as OkObjectResult;
-        Assert.NotNull(objectResult);
-        PlanetStatsResponse? response = objectResult.Value as PlanetStatsResponse;
-        Assert.NotNull(response);
-        Assert.Equal(expectedSlots, response.TotalSlotCount);
-        Assert.Equal(expectedTeamPicks, response.TeamPickCount);
+        PlanetStatsResponse statsResponse = result.CastTo<OkObjectResult, PlanetStatsResponse>();
+        Assert.Equal(expectedSlots, statsResponse.TotalSlotCount);
+        Assert.Equal(expectedTeamPicks, statsResponse.TeamPickCount);
     }
 
     [Fact]
-    public async void PlanetStats_ShouldReturnCorrectCounts_WhenNotEmpty()
+    public async Task PlanetStats_ShouldReturnCorrectCounts_WhenNotEmpty()
     {
         List<SlotEntity> slots = new()
         {
@@ -64,17 +61,13 @@ public class StatisticsControllerTests
 
         IActionResult result = await statsController.PlanetStats();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? objectResult = result as OkObjectResult;
-        Assert.NotNull(objectResult);
-        PlanetStatsResponse? response = objectResult.Value as PlanetStatsResponse;
-        Assert.NotNull(response);
-        Assert.Equal(expectedSlots, response.TotalSlotCount);
-        Assert.Equal(expectedTeamPicks, response.TeamPickCount);
+        PlanetStatsResponse statsResponse = result.CastTo<OkObjectResult, PlanetStatsResponse>();
+        Assert.Equal(expectedSlots, statsResponse.TotalSlotCount);
+        Assert.Equal(expectedTeamPicks, statsResponse.TeamPickCount);
     }
 
     [Fact]
-    public async void PlanetStats_ShouldReturnCorrectCounts_WhenSlotsAreIncompatibleGameVersion()
+    public async Task PlanetStats_ShouldReturnCorrectCounts_WhenSlotsAreIncompatibleGameVersion()
     {
         List<SlotEntity> slots = new()
         {
@@ -105,17 +98,13 @@ public class StatisticsControllerTests
 
         IActionResult result = await statsController.PlanetStats();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? objectResult = result as OkObjectResult;
-        Assert.NotNull(objectResult);
-        PlanetStatsResponse? response = objectResult.Value as PlanetStatsResponse;
-        Assert.NotNull(response);
-        Assert.Equal(expectedSlots, response.TotalSlotCount);
-        Assert.Equal(expectedTeamPicks, response.TeamPickCount);
+        PlanetStatsResponse statsResponse = result.CastTo<OkObjectResult, PlanetStatsResponse>();
+        Assert.Equal(expectedSlots, statsResponse.TotalSlotCount);
+        Assert.Equal(expectedTeamPicks, statsResponse.TeamPickCount);
     }
 
     [Fact]
-    public async void TotalLevelCount_ShouldReturnCorrectCount_WhenSlotsAreCompatible()
+    public async Task TotalLevelCount_ShouldReturnCorrectCount_WhenSlotsAreCompatible()
     {
         List<SlotEntity> slots = new()
         {
@@ -145,14 +134,12 @@ public class StatisticsControllerTests
 
         IActionResult result = await statsController.TotalLevelCount();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? objectResult = result as OkObjectResult;
-        Assert.NotNull(objectResult);
-        Assert.Equal(expectedTotal, objectResult.Value);
+        string totalSlotsResponse = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expectedTotal, totalSlotsResponse);
     }
 
     [Fact]
-    public async void TotalLevelCount_ShouldReturnCorrectCount_WhenSlotsAreNotCompatible()
+    public async Task TotalLevelCount_ShouldReturnCorrectCount_WhenSlotsAreNotCompatible()
     {
         List<SlotEntity> slots = new()
         {
@@ -178,15 +165,11 @@ public class StatisticsControllerTests
         StatisticsController statsController = new(dbMock);
         statsController.SetupTestController();
 
-        const int expectedStatusCode = 200;
         const string expectedTotal = "0";
 
         IActionResult result = await statsController.TotalLevelCount();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? objectResult = result as OkObjectResult;
-        Assert.NotNull(objectResult);
-        Assert.Equal(expectedStatusCode, objectResult.StatusCode);
-        Assert.Equal(expectedTotal, objectResult.Value);
+        string totalSlots = result.CastTo<OkObjectResult, string>();
+        Assert.Equal(expectedTotal, totalSlots);
     }
 }

ProjectLighthouse.Tests.GameApiTests/Unit/Controllers/UserControllerTests.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;
 using LBPUnion.ProjectLighthouse.Tests.Helpers;
@@ -14,7 +15,7 @@ namespace ProjectLighthouse.Tests.GameApiTests.Unit.Controllers;
 public class UserControllerTests
 {
     [Fact]
-    public async void GetUser_WithValidUser_ShouldReturnUser()
+    public async Task GetUser_WithValidUser_ShouldReturnUser()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
 
@@ -25,16 +26,12 @@ public class UserControllerTests
 
         IActionResult result = await userController.GetUser("unittest");
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObject = result as OkObjectResult;
-        Assert.NotNull(okObject);
-        GameUser? gameUser = okObject.Value as GameUser;
-        Assert.NotNull(gameUser);
+        GameUser gameUser = result.CastTo<OkObjectResult, GameUser>();
         Assert.Equal(expectedId, gameUser.UserId);
     }
 
     [Fact]
-    public async void GetUser_WithInvalidUser_ShouldReturnNotFound()
+    public async Task GetUser_WithInvalidUser_ShouldReturnNotFound()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
 
@@ -47,7 +44,7 @@ public class UserControllerTests
     }
 
     [Fact]
-    public async void GetUserAlt_WithInvalidUser_ShouldReturnEmptyList()
+    public async Task GetUserAlt_WithInvalidUser_ShouldReturnEmptyList()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
 
@@ -56,16 +53,12 @@ public class UserControllerTests
 
         IActionResult result = await userController.GetUserAlt(new[]{"notfound",});
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObject = result as OkObjectResult;
-        Assert.NotNull(okObject);
-        MinimalUserListResponse? userList = okObject.Value as MinimalUserListResponse? ?? default;
-        Assert.NotNull(userList);
-        Assert.Empty(userList.Value.Users);
+        MinimalUserListResponse userList = result.CastTo<OkObjectResult, MinimalUserListResponse>();
+        Assert.Empty(userList.Users);
     }
 
     [Fact]
-    public async void GetUserAlt_WithOnlyInvalidUsers_ShouldReturnEmptyList()
+    public async Task GetUserAlt_WithOnlyInvalidUsers_ShouldReturnEmptyList()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
 
@@ -77,16 +70,12 @@ public class UserControllerTests
             "notfound", "notfound2", "notfound3",
         });
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObject = result as OkObjectResult;
-        Assert.NotNull(okObject);
-        MinimalUserListResponse? userList = okObject.Value as MinimalUserListResponse? ?? default;
-        Assert.NotNull(userList);
-        Assert.Empty(userList.Value.Users);
+        MinimalUserListResponse userList = result.CastTo<OkObjectResult, MinimalUserListResponse>();
+        Assert.Empty(userList.Users);
     }
 
     [Fact]
-    public async void GetUserAlt_WithTwoInvalidUsers_AndOneValidUser_ShouldReturnOne()
+    public async Task GetUserAlt_WithTwoInvalidUsers_AndOneValidUser_ShouldReturnOne()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
 
@@ -99,16 +88,12 @@ public class UserControllerTests
             "notfound", "unittest", "notfound3",
         });
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObject = result as OkObjectResult;
-        Assert.NotNull(okObject);
-        MinimalUserListResponse? userList = okObject.Value as MinimalUserListResponse? ?? default;
-        Assert.NotNull(userList);
-        Assert.Single(userList.Value.Users);
+        MinimalUserListResponse userList = result.CastTo<OkObjectResult, MinimalUserListResponse>();
+        Assert.Single(userList.Users);
     }
 
     [Fact]
-    public async void GetUserAlt_WithTwoValidUsers_ShouldReturnTwo()
+    public async Task GetUserAlt_WithTwoValidUsers_ShouldReturnTwo()
     {
         List<UserEntity> users = new()
         {
@@ -132,16 +117,12 @@ public class UserControllerTests
             "unittest2", "unittest",
         });
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObject = result as OkObjectResult;
-        Assert.NotNull(okObject);
-        MinimalUserListResponse? userList = okObject.Value as MinimalUserListResponse? ?? default;
-        Assert.NotNull(userList);
-        Assert.Equal(expectedLength, userList.Value.Users.Count);
+        MinimalUserListResponse userList = result.CastTo<OkObjectResult, MinimalUserListResponse>();
+        Assert.Equal(expectedLength, userList.Users.Count);
     }
 
     [Fact]
-    public async void UpdateMyPins_ShouldReturnBadRequest_WhenBodyIsInvalid()
+    public async Task UpdateMyPins_ShouldReturnBadRequest_WhenBodyIsInvalid()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
 
@@ -155,7 +136,7 @@ public class UserControllerTests
     }
 
     [Fact]
-    public async void UpdateMyPins_ShouldUpdatePins()
+    public async Task UpdateMyPins_ShouldUpdatePins()
     {
         await using DatabaseContext dbMock = await MockHelper.GetTestDatabase();
 
@@ -167,15 +148,13 @@ public class UserControllerTests
 
         IActionResult result = await userController.UpdateMyPins();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObject = result as OkObjectResult;
-        Assert.NotNull(okObject);
+        string pinsResponse = result.CastTo<OkObjectResult, string>();
         Assert.Equal(expectedPins, dbMock.Users.First().Pins);
-        Assert.Equal(expectedResponse, okObject.Value);
+        Assert.Equal(expectedResponse, pinsResponse);
     }
 
     [Fact]
-    public async void UpdateMyPins_ShouldNotSave_WhenPinsAreEqual()
+    public async Task UpdateMyPins_ShouldNotSave_WhenPinsAreEqual()
     {
         UserEntity entity = MockHelper.GetUnitTestUser();
         entity.Pins = "1234";
@@ -193,10 +172,9 @@ public class UserControllerTests
 
         IActionResult result = await userController.UpdateMyPins();
 
-        Assert.IsType<OkObjectResult>(result);
-        OkObjectResult? okObject = result as OkObjectResult;
-        Assert.NotNull(okObject);
+        string pinsResponse = result.CastTo<OkObjectResult, string>();
+
         Assert.Equal(expectedPins, dbMock.Users.First().Pins);
-        Assert.Equal(expectedResponse, okObject.Value);
+        Assert.Equal(expectedResponse, pinsResponse);
     }
 }

ProjectLighthouse.Tests.GameApiTests/Unit/Middlewares/DigestMiddlewareTests.cs

@@ -16,7 +16,7 @@ public class DigestMiddlewareTests
 {
 
     [Fact]
-    public async void DigestMiddleware_ShouldNotComputeDigests_WhenDigestsDisabled()
+    public async Task DigestMiddleware_ShouldNotComputeDigests_WhenDigestsDisabled()
     {
         DefaultHttpContext context = new()
         {
@@ -44,7 +44,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldReject_WhenDigestHeaderIsMissing()
+    public async Task DigestMiddleware_ShouldReject_WhenDigestHeaderIsMissing()
     {
         DefaultHttpContext context = new()
         {
@@ -77,7 +77,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldReject_WhenRequestDigestInvalid()
+    public async Task DigestMiddleware_ShouldReject_WhenRequestDigestInvalid()
     {
         DefaultHttpContext context = new()
         {
@@ -112,7 +112,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldUseAlternateDigest_WhenPrimaryDigestInvalid()
+    public async Task DigestMiddleware_ShouldUseAlternateDigest_WhenPrimaryDigestInvalid()
     {
         DefaultHttpContext context = new()
         {
@@ -150,8 +150,8 @@ public class DigestMiddlewareTests
         Assert.Equal(expectedClientDigest, context.Response.Headers["X-Digest-B"][0]);
     }
 
-[Fact]
-    public async void DigestMiddleware_ShouldNotReject_WhenRequestingAnnounce()
+    [Fact]
+    public async Task DigestMiddleware_ShouldNotReject_WhenRequestingAnnounce()
     {
         DefaultHttpContext context = new()
         {
@@ -188,7 +188,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldCalculate_WhenAuthCookieEmpty()
+    public async Task DigestMiddleware_ShouldCalculate_WhenAuthCookieEmpty()
     {
         DefaultHttpContext context = new()
         {
@@ -225,7 +225,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldComputeDigestsWithNoBody_WhenDigestsEnabled()
+    public async Task DigestMiddleware_ShouldComputeDigestsWithNoBody_WhenDigestsEnabled()
     {
         DefaultHttpContext context = new()
         {
@@ -263,7 +263,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldComputeDigestsWithBody_WhenDigestsEnabled_AndNoResponseBody()
+    public async Task DigestMiddleware_ShouldComputeDigestsWithBody_WhenDigestsEnabled_AndNoResponseBody()
     {
         DefaultHttpContext context = new()
         {
@@ -301,7 +301,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldComputeDigestsWithBody_WhenDigestsEnabled_AndResponseBody()
+    public async Task DigestMiddleware_ShouldComputeDigestsWithBody_WhenDigestsEnabled_AndResponseBody()
     {
         DefaultHttpContext context = new()
         {
@@ -339,7 +339,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldComputeDigestsWithBody_WhenUploading()
+    public async Task DigestMiddleware_ShouldComputeDigestsWithBody_WhenUploading()
     {
         DefaultHttpContext context = new()
         {
@@ -377,7 +377,7 @@ public class DigestMiddlewareTests
     }
 
     [Fact]
-    public async void DigestMiddleware_ShouldCompressResponse_WhenAcceptEncodingHeaderIsPresent()
+    public async Task DigestMiddleware_ShouldCompressResponse_WhenAcceptEncodingHeaderIsPresent()
     {
         DefaultHttpContext context = new()
         {

ProjectLighthouse.Tests.GameApiTests/Unit/Middlewares/SetLastContactMiddlewareTests.cs

@@ -17,9 +17,8 @@ namespace ProjectLighthouse.Tests.GameApiTests.Unit.Middlewares;
 [Trait("Category", "Unit")]
 public class SetLastContactMiddlewareTests
 {
-
     [Fact]
-    public async void SetLastContact_ShouldAddLastContact_WhenTokenIsLBP1()
+    public async Task SetLastContact_ShouldAddLastContact_WhenTokenIsLBP1()
     {
         DefaultHttpContext context = new()
         {
@@ -56,7 +55,7 @@ public class SetLastContactMiddlewareTests
     }
 
     [Fact]
-    public async void SetLastContact_ShouldUpdateLastContact_WhenTokenIsLBP1()
+    public async Task SetLastContact_ShouldUpdateLastContact_WhenTokenIsLBP1()
     {
         DefaultHttpContext context = new()
         {
@@ -106,7 +105,7 @@ public class SetLastContactMiddlewareTests
     }
 
     [Fact]
-    public async void SetLastContact_ShouldNotAddLastContact_WhenTokenIsNotLBP1()
+    public async Task SetLastContact_ShouldNotAddLastContact_WhenTokenIsNotLBP1()
     {
         DefaultHttpContext context = new()
         {
@@ -146,5 +145,4 @@ public class SetLastContactMiddlewareTests
         LastContactEntity? lastContactEntity = dbMock.LastContacts.FirstOrDefault();
         Assert.Null(lastContactEntity);
     }
-
 }

ProjectLighthouse.Tests/Helpers/IntegrationHelper.cs

@@ -8,7 +8,6 @@ namespace LBPUnion.ProjectLighthouse.Tests.Helpers;
 
 public static class IntegrationHelper
 {
-
     private static readonly Lazy<bool> dbConnected = new(IsDbConnected);
 
     private static bool IsDbConnected() => ServerStatics.DbConnected;

ProjectLighthouse.Tests/Helpers/MockHelper.cs

@@ -14,6 +14,7 @@ using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Controllers;
 using Microsoft.EntityFrameworkCore;
+using Xunit;
 
 namespace LBPUnion.ProjectLighthouse.Tests.Helpers;
 
@@ -38,6 +39,18 @@ public static class MockHelper
             UserToken = "unittest",
         };
 
+    public static T2 CastTo<T1, T2>(this IActionResult result) where T1 : ObjectResult
+    {
+        Assert.IsType<T1>(result);
+        T1? typedResult = result as T1;
+        Assert.NotNull(typedResult);
+        Assert.NotNull(typedResult.Value);
+        Assert.IsType<T2?>(typedResult.Value);
+        T2? finalResult = (T2?)typedResult.Value;
+        Assert.NotNull(finalResult);
+        return finalResult;
+    }
+
     public static async Task<DatabaseContext> GetTestDatabase(IEnumerable<IList> sets, [CallerMemberName] string caller = "", [CallerLineNumber] int lineNum = 0)
     {
         Dictionary<Type, IList> setDict = new();
@@ -109,9 +122,14 @@ public static class MockHelper
     }
 
     public static void SetupTestController(this ControllerBase controllerBase, string? body = null)
+    {
+        SetupTestController(controllerBase, GetUnitTestToken(), body);
+    }
+
+    public static void SetupTestController(this ControllerBase controllerBase, GameTokenEntity token, string? body = null)
     {
         controllerBase.ControllerContext = GetMockControllerContext(body);
-        SetupTestGameToken(controllerBase, GetUnitTestToken());
+        SetupTestGameToken(controllerBase, token);
     }
 
     public static ControllerContext GetMockControllerContext() =>

ProjectLighthouse.Tests/Integration/LighthouseServerTest.cs

@@ -88,6 +88,8 @@ public class LighthouseServerTest<TStartup> where TStartup : class
 
     private Task<HttpResponseMessage> AuthenticatedRequest(string endpoint, string mmAuth, HttpMethod method)
     {
+        if (!endpoint.StartsWith("/")) endpoint = $"/{endpoint}";
+
         using HttpRequestMessage requestMessage = new(method, endpoint);
         requestMessage.Headers.Add("Cookie", mmAuth);
         string path = endpoint.Split("?", StringSplitOptions.RemoveEmptyEntries)[0];

ProjectLighthouse.Tests/Unit/FilterTests.cs

@@ -0,0 +1,841 @@
+using System;
+using System.Collections.Generic;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Filter.Filters;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Users;
+using Xunit;
+
+namespace LBPUnion.ProjectLighthouse.Tests.Unit;
+
+[Trait("Category", "Unit")]
+public class FilterTests
+{
+    [Fact]
+    public void QueryBuilder_DoesDeepClone()
+    {
+        SlotQueryBuilder queryBuilder = new();
+        queryBuilder.AddFilter(new CrossControlFilter());
+
+        SlotQueryBuilder clonedBuilder = queryBuilder.Clone();
+
+        Assert.NotEqual(queryBuilder, clonedBuilder);
+    }
+
+    [Fact]
+    public void AdventureFilter_ShouldAccept_WhenAdventure()
+    {
+        AdventureFilter adventureFilter = new();
+        Func<SlotEntity, bool> adventureFunc = adventureFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            IsAdventurePlanet = true,
+        };
+
+        Assert.True(adventureFunc(slot));
+    }
+
+    [Fact]
+    public void AdventureFilter_ShouldReject_WhenNotAdventure()
+    {
+        AdventureFilter adventureFilter = new();
+        Func<SlotEntity, bool> adventureFunc = adventureFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            IsAdventurePlanet = false,
+        };
+
+        Assert.False(adventureFunc(slot));
+    }
+
+    [Fact]
+    public void AuthorLabelFilter_ShouldAccept_WhenExactMatch()
+    {
+        string[] filters =
+        {
+            "LABEL_Test", "LABEL_Unit",
+        };
+        AuthorLabelFilter labelFilter = new(filters);
+        Func<SlotEntity, bool> labelFunc = labelFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            AuthorLabels = "LABEL_Test,LABEL_Unit",
+        };
+
+        Assert.True(labelFunc(slot));
+    }
+
+    [Fact]
+    public void AuthorLabelFilter_ShouldAccept_WhenExactMatch_AndExtraLabelsPresent()
+    {
+        string[] filters =
+        {
+            "LABEL_Test", "LABEL_Unit",
+        };
+        AuthorLabelFilter labelFilter = new(filters);
+        Func<SlotEntity, bool> labelFunc = labelFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            AuthorLabels = "LABEL_Test,LABEL_Unit,LABEL_Lighthouse,LABEL_Bruh",
+        };
+
+        Assert.True(labelFunc(slot));
+    }
+
+    [Fact]
+    public void AuthorLabelFilter_ShouldAccept_WhenFilterEmpty_AndLabelsEmpty()
+    {
+        string[] filters = Array.Empty<string>();
+        AuthorLabelFilter labelFilter = new(filters);
+        Func<SlotEntity, bool> labelFunc = labelFilter.GetPredicate().Compile();
+
+        SlotEntity slotWithNoLabels = new()
+        {
+            AuthorLabels = "",
+        };
+
+        Assert.True(labelFunc(slotWithNoLabels));
+    }
+
+    [Fact]
+    public void AuthorLabelFilter_ShouldReject_WhenNoneMatch()
+    {
+        string[] filters =
+        {
+            "LABEL_Test", "LABEL_Unit",
+        };
+        AuthorLabelFilter labelFilter = new(filters);
+        Func<SlotEntity, bool> labelFunc = labelFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            AuthorLabels = "LABEL_Adventure,LABEL_Versus",
+        };
+
+        Assert.False(labelFunc(slot));
+    }
+
+    [Fact]
+    public void CreatorFilter_ShouldAccept_WhenCreatorIdMatch()
+    {
+        const int creatorId = 27;
+        CreatorFilter creatorFilter = new(creatorId);
+        Func<SlotEntity, bool> creatorFunc = creatorFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CreatorId = creatorId,
+        };
+
+        Assert.True(creatorFunc(slot));
+    }
+
+    [Fact]
+    public void CreatorFilter_ShouldReject_WhenCreatorIdMismatch()
+    {
+        const int filterCreatorId = 27;
+        const int slotCreatorId = 28;
+        CreatorFilter creatorFilter = new(filterCreatorId);
+        Func<SlotEntity, bool> creatorFunc = creatorFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CreatorId = slotCreatorId,
+        };
+
+        Assert.False(creatorFunc(slot));
+    }
+
+    [Fact]
+    public void CrossControlFilter_ShouldAccept_WhenCrossControlRequired()
+    {
+        CrossControlFilter crossControlFilter = new();
+        Func<SlotEntity, bool> ccFunc = crossControlFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CrossControllerRequired = true,
+        };
+
+        Assert.True(ccFunc(slot));
+    }
+
+    [Fact]
+    public void CrossControlFilter_ShouldReject_WhenCrossControlNotRequired()
+    {
+        CrossControlFilter crossControlFilter = new();
+        Func<SlotEntity, bool> ccFunc = crossControlFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CrossControllerRequired = false,
+        };
+
+        Assert.False(ccFunc(slot));
+    }
+
+    [Fact]
+    public void ExcludeAdventureFilter_ShouldReject_WhenAdventure()
+    {
+        ExcludeAdventureFilter excludeAdventureFilter = new();
+        Func<SlotEntity, bool> adventureFunc = excludeAdventureFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            IsAdventurePlanet = true,
+        };
+
+        Assert.False(adventureFunc(slot));
+    }
+
+    [Fact]
+    public void ExcludeAdventureFilter_ShouldAccept_WhenNotAdventure()
+    {
+        ExcludeAdventureFilter excludeAdventureFilter = new();
+        Func<SlotEntity, bool> adventureFunc = excludeAdventureFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            IsAdventurePlanet = false,
+        };
+
+        Assert.True(adventureFunc(slot));
+    }
+
+    [Fact]
+    public void ExcludeLBP1OnlyFilter_ShouldReject_WhenLbp1Only_AndTokenNotLbp1_AndNotCreator()
+    {
+        ExcludeLBP1OnlyFilter excludeLBP1 = new(10, GameVersion.LittleBigPlanet2);
+        Func<SlotEntity, bool> excludeFunc = excludeLBP1.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Lbp1Only = true,
+        };
+
+        Assert.False(excludeFunc(slot));
+    }
+
+    [Fact]
+    public void ExcludeLBP1OnlyFilter_ShouldAccept_WhenLbp1Only_AndTokenLbp1()
+    {
+        ExcludeLBP1OnlyFilter excludeLBP1 = new(10, GameVersion.LittleBigPlanet1);
+        Func<SlotEntity, bool> excludeFunc = excludeLBP1.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Lbp1Only = true,
+        };
+
+        Assert.True(excludeFunc(slot));
+    }
+
+    [Fact]
+    public void ExcludeLBP1OnlyFilter_ShouldAccept_WhenLbp1Only_AndTokenNotLbp1_AndIsCreator()
+    {
+        ExcludeLBP1OnlyFilter excludeLBP1 = new(10, GameVersion.LittleBigPlanet2);
+        Func<SlotEntity, bool> excludeFunc = excludeLBP1.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CreatorId = 10,
+            Lbp1Only = true,
+        };
+
+        Assert.True(excludeFunc(slot));
+    }
+
+    [Fact]
+    public void ExcludeMovePackFilter_ShouldReject_WhenMoveRequired()
+    {
+        ExcludeMovePackFilter excludeMove = new();
+        Func<SlotEntity, bool> excludeFunc = excludeMove.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MoveRequired = true,
+        };
+
+        Assert.False(excludeFunc(slot));
+    }
+
+    [Fact]
+    public void ExcludeMovePackFilter_ShouldAccept_WhenMoveNotRequired()
+    {
+        ExcludeMovePackFilter excludeMove = new();
+        Func<SlotEntity, bool> excludeFunc = excludeMove.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MoveRequired = false,
+        };
+        
+        Assert.True(excludeFunc(slot));
+    }
+
+    [Fact]
+    public void FirstUploadedFilter_ShouldReject_WhenOlderThanStartTime()
+    {
+        FirstUploadedFilter uploadFilter = new(1000);
+        Func<SlotEntity, bool> uploadFunc = uploadFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            FirstUploaded = 999,
+        };
+
+        Assert.False(uploadFunc(slot));
+    }
+
+    [Fact]
+    public void FirstUploadedFilter_ShouldAccept_WhenNewerThanStartTime()
+    {
+        FirstUploadedFilter uploadFilter = new(1000);
+        Func<SlotEntity, bool> uploadFunc = uploadFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            FirstUploaded = 1001,
+        };
+
+        Assert.True(uploadFunc(slot));
+    }
+
+    [Fact]
+    public void FirstUploadedFilter_ShouldReject_WhenOlderThanEndTime()
+    {
+        FirstUploadedFilter uploadFilter = new(0, 1000);
+        Func<SlotEntity, bool> uploadFunc = uploadFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            FirstUploaded = 1001,
+        };
+
+        Assert.False(uploadFunc(slot));
+    }
+
+    [Fact]
+    public void FirstUploadedFilter_ShouldAccept_WhenNewerThanEndTime()
+    {
+        FirstUploadedFilter uploadFilter = new(0, 1000);
+        Func<SlotEntity, bool> uploadFunc = uploadFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            FirstUploaded = 999,
+        };
+
+        Assert.True(uploadFunc(slot));
+    }
+
+    [Fact]
+    public void GameVersionFilter_ShouldAccept_WhenExact_AndEqual()
+    {
+        GameVersionFilter gameVersionFilter = new(GameVersion.LittleBigPlanet1, true);
+        Func<SlotEntity, bool> versionFunc = gameVersionFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            GameVersion = GameVersion.LittleBigPlanet1,
+        };
+
+        Assert.True(versionFunc(slot));
+    }
+
+    [Fact]
+    public void GameVersionFilter_ShouldReject_WhenExact_AndNotEqual()
+    {
+        GameVersionFilter gameVersionFilter = new(GameVersion.LittleBigPlanet2, true);
+        Func<SlotEntity, bool> versionFunc = gameVersionFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            GameVersion = GameVersion.LittleBigPlanet1,
+        };
+
+        Assert.False(versionFunc(slot));
+    }
+
+    [Fact]
+    public void GameVersionFilter_ShouldAccept_WhenNotExact_AndGreaterThan()
+    {
+        GameVersionFilter gameVersionFilter = new(GameVersion.LittleBigPlanet2);
+        Func<SlotEntity, bool> versionFunc = gameVersionFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            GameVersion = GameVersion.LittleBigPlanet1,
+        };
+
+        Assert.True(versionFunc(slot));
+    }
+
+    [Fact]
+    public void GameVersionFilter_ShouldAccept_WhenNotExact_AndEqual()
+    {
+        GameVersionFilter gameVersionFilter = new(GameVersion.LittleBigPlanet2);
+        Func<SlotEntity, bool> versionFunc = gameVersionFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            GameVersion = GameVersion.LittleBigPlanet2,
+        };
+
+        Assert.True(versionFunc(slot));
+    }
+
+    [Fact]
+    public void GameVersionFilter_ShouldReject_WhenNotExact_AndLessThan()
+    {
+        GameVersionFilter gameVersionFilter = new(GameVersion.LittleBigPlanet1);
+        Func<SlotEntity, bool> versionFunc = gameVersionFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            GameVersion = GameVersion.LittleBigPlanet2,
+        };
+
+        Assert.False(versionFunc(slot));
+    }
+
+    [Fact]
+    public void GameVersionFilter_ShouldReject_WhenVersionNotInList()
+    {
+        GameVersionListFilter gameVersionListFilter = new(GameVersion.LittleBigPlanet1, GameVersion.LittleBigPlanet2);
+        Func<SlotEntity, bool> versionFunc = gameVersionListFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            GameVersion = GameVersion.LittleBigPlanet3,
+        };
+
+        Assert.False(versionFunc(slot));
+    }
+
+    [Fact]
+    public void GameVersionFilter_ShouldAccept_WhenVersionIsInList()
+    {
+        GameVersionListFilter gameVersionListFilter = new(GameVersion.LittleBigPlanet1, GameVersion.LittleBigPlanet2);
+        Func<SlotEntity, bool> versionFunc = gameVersionListFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            GameVersion = GameVersion.LittleBigPlanet1,
+        };
+
+        Assert.True(versionFunc(slot));
+    }
+
+    [Fact]
+    public void HiddenSlotFilter_ShouldReject_WhenHidden()
+    {
+        HiddenSlotFilter hiddenSlotFilter = new();
+        Func<SlotEntity, bool> hiddenFunc = hiddenSlotFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Hidden = true,
+        };
+
+        Assert.False(hiddenFunc(slot));
+    }
+
+    [Fact]
+    public void HiddenSlotFilter_ShouldAccept_WhenNotHidden()
+    {
+        HiddenSlotFilter hiddenSlotFilter = new();
+        Func<SlotEntity, bool> hiddenFunc = hiddenSlotFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Hidden = false,
+        };
+
+        Assert.True(hiddenFunc(slot));
+    }
+
+    [Fact]
+    public void MoveFilter_ShouldAccept_WhenMoveRequired()
+    {
+        MovePackFilter movePackFilter = new();
+        Func<SlotEntity, bool> moveFunc = movePackFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MoveRequired = true,
+        };
+
+        Assert.True(moveFunc(slot));
+    }
+
+    [Fact]
+    public void MoveFilter_ShouldReject_WhenMoveNotRequired()
+    {
+        MovePackFilter movePackFilter = new();
+        Func<SlotEntity, bool> moveFunc = movePackFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MoveRequired = false,
+        };
+
+        Assert.False(moveFunc(slot));
+    }
+
+    [Fact]
+    public void PlayerCountFilter_ShouldReject_WhenHigherThanMaxPlayers()
+    {
+        PlayerCountFilter playerCountFilter = new(maxPlayers: 2);
+        Func<SlotEntity, bool> countFunc = playerCountFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MinimumPlayers = 1,
+            MaximumPlayers = 4,
+        };
+
+        Assert.False(countFunc(slot));
+    }
+
+    [Fact]
+    public void PlayerCountFilter_ShouldReject_WhenLowerThanMinPlayers()
+    {
+        PlayerCountFilter playerCountFilter = new(minPlayers: 2);
+        Func<SlotEntity, bool> countFunc = playerCountFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MinimumPlayers = 1,
+            MaximumPlayers = 4,
+        };
+
+        Assert.False(countFunc(slot));
+    }
+
+    [Fact]
+    public void PlayerCountFilter_ShouldAccept_WhenLowerThanMaxPlayers()
+    {
+        PlayerCountFilter playerCountFilter = new(maxPlayers: 3);
+        Func<SlotEntity, bool> countFunc = playerCountFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MinimumPlayers = 1,
+            MaximumPlayers = 2,
+        };
+
+        Assert.True(countFunc(slot));
+    }
+
+    [Fact]
+    public void PlayerCountFilter_ShouldAccept_WhenHigherThanMinPlayers()
+    {
+        PlayerCountFilter playerCountFilter = new(minPlayers: 2);
+        Func<SlotEntity, bool> countFunc = playerCountFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            MinimumPlayers = 3,
+            MaximumPlayers = 4,
+        };
+
+        Assert.True(countFunc(slot));
+    }
+
+    [Fact]
+    public void ResultTypeFilter_ShouldReject_WhenSlotNotPresent()
+    {
+        ResultTypeFilter resultFilter = new();
+        Func<SlotEntity, bool> resultFunc = resultFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new();
+
+        Assert.False(resultFunc(slot));
+    }
+
+    [Fact]
+    public void ResultTypeFilter_ShouldAccept_WhenSlotPresent()
+    {
+        ResultTypeFilter resultFilter = new("slot");
+        Func<SlotEntity, bool> resultFunc = resultFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new();
+
+        Assert.True(resultFunc(slot));
+    }
+
+    [Fact]
+    public void SlotIdFilter_ShouldReject_WhenSlotIdNotPresent()
+    {
+        SlotIdFilter idFilter = new(new List<int>
+        {
+            2,
+        });
+        Func<SlotEntity, bool> idFunc = idFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            SlotId = 1,
+        };
+
+        Assert.False(idFunc(slot));
+    }
+
+    [Fact]
+    public void SlotIdFilter_ShouldAccept_WhenSlotIdPresent()
+    {
+        SlotIdFilter idFilter = new(new List<int>
+        {
+            2,
+        });
+        Func<SlotEntity, bool> idFunc = idFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            SlotId = 2,
+        };
+
+        Assert.True(idFunc(slot));
+    }
+
+    [Fact]
+    public void SlotTypeFilter_ShouldAccept_WhenSlotTypeMatches()
+    {
+        SlotTypeFilter slotTypeFilter = new(SlotType.User);
+        Func<SlotEntity, bool> typeFunc = slotTypeFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Type = SlotType.User,
+        };
+
+        Assert.True(typeFunc(slot));
+    }
+
+    [Fact]
+    public void SlotTypeFilter_ShouldAccept_WhenSlotTypeDoesNotMatch()
+    {
+        SlotTypeFilter slotTypeFilter = new(SlotType.User);
+        Func<SlotEntity, bool> typeFunc = slotTypeFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Type = SlotType.Developer,
+        };
+
+        Assert.False(typeFunc(slot));
+    }
+
+    [Fact]
+    public void SubLevelFilter_ShouldAccept_WhenUserIsCreator_AndNotSubLevel()
+    {
+        SubLevelFilter subLevelFilter = new(2);
+        Func<SlotEntity, bool> subLevelFunc = subLevelFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CreatorId = 2,
+            SubLevel = false,
+        };
+
+        Assert.True(subLevelFunc(slot));
+    }
+
+    [Fact]
+    public void SubLevelFilter_ShouldAccept_WhenUserIsCreator_AndSubLevel()
+    {
+        SubLevelFilter subLevelFilter = new(2);
+        Func<SlotEntity, bool> subLevelFunc = subLevelFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CreatorId = 2,
+            SubLevel = true,
+        };
+
+        Assert.True(subLevelFunc(slot));
+    }
+
+    [Fact]
+    public void SubLevelFilter_ShouldReject_WhenUserIsNotCreator_AndSubLevel()
+    {
+        SubLevelFilter subLevelFilter = new(2);
+        Func<SlotEntity, bool> subLevelFunc = subLevelFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CreatorId = 1,
+            SubLevel = true,
+        };
+
+        Assert.False(subLevelFunc(slot));
+    }
+
+    [Fact]
+    public void SubLevelFilter_ShouldAccept_WhenUserIsNotCreator_AndNotSubLevel()
+    {
+        SubLevelFilter subLevelFilter = new(2);
+        Func<SlotEntity, bool> subLevelFunc = subLevelFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            CreatorId = 1,
+            SubLevel = false,
+        };
+
+        Assert.True(subLevelFunc(slot));
+    }
+
+    [Fact]
+    public void TeamPickFilter_ShouldAccept_WhenTeamPick()
+    {
+        TeamPickFilter teamPickFilter = new();
+        Func<SlotEntity, bool> teamPickFunc = teamPickFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            TeamPick = true,
+        };
+
+        Assert.True(teamPickFunc(slot));
+    }
+
+    [Fact]
+    public void TeamPickFilter_ShouldReject_WhenNotTeamPick()
+    {
+        TeamPickFilter teamPickFilter = new();
+        Func<SlotEntity, bool> teamPickFunc = teamPickFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            TeamPick = false,
+        };
+
+        Assert.False(teamPickFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldAccept_WhenDescriptionContainsText()
+    {
+        TextFilter textFilter = new("test");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Description = "unit test",
+        };
+
+        Assert.True(textFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldReject_WhenDescriptionDoesNotContainText()
+    {
+        TextFilter textFilter = new("test");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Description = "fraction exam",
+        };
+
+        Assert.False(textFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldAccept_WhenNameContainsText()
+    {
+        TextFilter textFilter = new("test");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Name = "unit test",
+        };
+
+        Assert.True(textFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldReject_WhenNameDoesNotContainText()
+    {
+        TextFilter textFilter = new("test");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Name = "fraction exam",
+        };
+
+        Assert.False(textFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldAccept_WhenIdContainsText()
+    {
+        TextFilter textFilter = new("21");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            SlotId = 21,
+        };
+
+        Assert.True(textFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldReject_WhenIdDoesNotContainText()
+    {
+        TextFilter textFilter = new("21");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            SlotId = 19,
+        };
+
+        Assert.False(textFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldAccept_WhenCreatorUsernameContainsText()
+    {
+        TextFilter textFilter = new("test");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Creator = new UserEntity
+            {
+                Username = "test",
+            },
+        };
+
+        Assert.True(textFunc(slot));
+    }
+
+    [Fact]
+    public void TextFilter_ShouldReject_WhenCreatorUsernameDoesNotContainText()
+    {
+        TextFilter textFilter = new("test");
+        Func<SlotEntity, bool> textFunc = textFilter.GetPredicate().Compile();
+
+        SlotEntity slot = new()
+        {
+            Creator = new UserEntity
+            {
+                Username = "bruh",
+            },
+        };
+
+        Assert.False(textFunc(slot));
+    }
+}

ProjectLighthouse.Tests/Unit/PaginationTests.cs

@@ -0,0 +1,238 @@
+using System.Collections.Generic;
+using System.Linq;
+using LBPUnion.ProjectLighthouse.Configuration;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Serialization;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Primitives;
+using Xunit;
+
+namespace LBPUnion.ProjectLighthouse.Tests.Unit;
+
+[Trait("Category", "Unit")]
+public class PaginationTests
+{
+    [Fact]
+    public void GetPaginationData_IsReadFromQuery()
+    {
+        DefaultHttpContext defaultHttpContext = new()
+        {
+            Request =
+            {
+                Query = new QueryCollection(new Dictionary<string, StringValues>
+                {
+                    {
+                        "pageStart", new StringValues("10")
+                    },
+                    {
+                        "pageSize", new StringValues("15")
+                    },
+                }),
+            },
+        };
+
+        PaginationData pageData = defaultHttpContext.Request.GetPaginationData();
+
+        const int expectedPageStart = 10;
+        const int expectedPageSize = 15;
+
+        Assert.Equal(expectedPageStart, pageData.PageStart);
+        Assert.Equal(expectedPageSize, pageData.PageSize);
+    }
+
+    [Fact]
+    public void GetPaginationData_IsPageStartSetToDefault_WhenMissing()
+    {
+        DefaultHttpContext defaultHttpContext = new()
+        {
+            Request =
+            {
+                Query = new QueryCollection(new Dictionary<string, StringValues>
+                {
+                    {
+                        "pageSize", new StringValues("15")
+                    },
+                }),
+            },
+        };
+        PaginationData pageData = defaultHttpContext.Request.GetPaginationData();
+
+        const int expectedPageStart = 0;
+        const int expectedPageSize = 15;
+
+        Assert.Equal(expectedPageStart, pageData.PageStart);
+        Assert.Equal(expectedPageSize, pageData.PageSize);
+    }
+
+    [Fact]
+    public void GetPaginationData_IsPageSizeSetToDefault_WhenMissing()
+    {
+        ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots = 50;
+
+        DefaultHttpContext defaultHttpContext = new()
+        {
+            Request =
+            {
+                Query = new QueryCollection(new Dictionary<string, StringValues>
+                {
+                    {
+                        "pageStart", new StringValues("10")
+                    },
+                }),
+            },
+        };
+        PaginationData pageData = defaultHttpContext.Request.GetPaginationData();
+
+        const int expectedPageStart = 10;
+        const int expectedPageSize = 50;
+
+        Assert.Equal(expectedPageStart, pageData.PageStart);
+        Assert.Equal(expectedPageSize, pageData.PageSize);
+    }
+
+    [Fact]
+    public void GetPaginationData_NegativeValuesAreSetToZero()
+    {
+        ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots = 50;
+
+        DefaultHttpContext defaultHttpContext = new()
+        {
+            Request =
+            {
+                Query = new QueryCollection(new Dictionary<string, StringValues>
+                {
+                    {
+                        "pageStart", new StringValues("-10")
+                    },
+                    {
+                        "pageSize", new StringValues("-10")
+                    },
+                }),
+            },
+        };
+        PaginationData pageData = defaultHttpContext.Request.GetPaginationData();
+
+        const int expectedPageStart = 0;
+        const int expectedPageSize = 10;
+
+        Assert.Equal(expectedPageStart, pageData.PageStart);
+        Assert.Equal(expectedPageSize, pageData.PageSize);
+    }
+
+    [Fact]
+    public void ApplyPagination_ShouldApplyCorrectPagination()
+    {
+        List<GameUser> users = new();
+        for (int i = 0; i < 30; i++)
+        {
+            users.Add(new GameUser
+            {
+                UserId = i+1,
+            });
+        }
+
+        PaginationData pageData = new()
+        {
+            PageSize = 5,
+            PageStart = 6,
+        };
+        List<GameUser> pagedUsers = users.AsQueryable().ApplyPagination(pageData).ToList();
+
+        Assert.Equal(pageData.PageSize, pagedUsers.Count);
+        Assert.Equal(6, pagedUsers[0].UserId);
+        Assert.Equal(10, pagedUsers[4].UserId);
+    }
+
+    [Fact]
+    public void ApplyPagination_ShouldClampPageStart_WhenNegative()
+    {
+        List<GameUser> users = new();
+        for (int i = 0; i < 30; i++)
+        {
+            users.Add(new GameUser
+            {
+                UserId = i + 1,
+            });
+        }
+
+        PaginationData pageData = new()
+        {
+            PageSize = 5,
+            PageStart = -5,
+        };
+        List<GameUser> pagedUsers = users.AsQueryable().ApplyPagination(pageData).ToList();
+
+        Assert.Equal(pageData.PageSize, pagedUsers.Count);
+        Assert.Equal(1, pagedUsers[0].UserId);
+        Assert.Equal(5, pagedUsers[4].UserId);
+    }
+
+    [Fact]
+    public void ApplyPagination_ShouldReturnEmpty_WhenPageSizeNegative()
+    {
+        List<GameUser> users = new();
+        for (int i = 0; i < 30; i++)
+        {
+            users.Add(new GameUser
+            {
+                UserId = i + 1,
+            });
+        }
+
+        PaginationData pageData = new()
+        {
+            PageSize = -5,
+            PageStart = 0,
+        };
+        List<GameUser> pagedUsers = users.AsQueryable().ApplyPagination(pageData).ToList();
+
+        Assert.Empty(pagedUsers);
+    }
+
+    [Fact]
+    public void ApplyPagination_ShouldClampPageSize_WhenSizeExceedsMaxElements()
+    {
+        List<GameUser> users = new();
+        for (int i = 0; i < 30; i++)
+        {
+            users.Add(new GameUser
+            {
+                UserId = i + 1,
+            });
+        }
+
+        PaginationData pageData = new()
+        {
+            PageSize = 10,
+            PageStart = 0,
+            MaxElements = 1,
+        };
+        List<GameUser> pagedUsers = users.AsQueryable().ApplyPagination(pageData).ToList();
+
+        Assert.Single(pagedUsers);
+    }
+
+    [Fact]
+    public void ApplyPagination_ShouldClampPageSize_WhenSizeExceedsInternalLimit()
+    {
+        List<GameUser> users = new();
+        for (int i = 0; i < 1001; i++)
+        {
+            users.Add(new GameUser
+            {
+                UserId = i + 1,
+            });
+        }
+
+        PaginationData pageData = new()
+        {
+            PageSize = int.MaxValue,
+            PageStart = 0,
+            MaxElements = int.MaxValue,
+        };
+        List<GameUser> pagedUsers = users.AsQueryable().ApplyPagination(pageData).ToList();
+
+        Assert.Equal(1000, pagedUsers.Count);
+    }
+}

ProjectLighthouse.Tests/Unit/ResourceTests.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Threading.Tasks;
 using LBPUnion.ProjectLighthouse.Files;
 using LBPUnion.ProjectLighthouse.Types.Resources;
 using Xunit;
@@ -44,7 +45,7 @@ public class ResourceTests
     }
 
     [Fact]
-    public async void ShouldDeleteResourceAndImage()
+    public async Task ShouldDeleteResourceAndImage()
     {
         FileHelper.EnsureDirectoryCreated(FileHelper.ResourcePath);
         FileHelper.EnsureDirectoryCreated(FileHelper.ImagePath);

ProjectLighthouse/Extensions/DatabaseExtensions.cs

@@ -2,56 +2,12 @@ using System;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
-using LBPUnion.ProjectLighthouse.Types.Entities.Level;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Users;
 using Microsoft.EntityFrameworkCore;
 
 namespace LBPUnion.ProjectLighthouse.Extensions;
 
 public static class DatabaseExtensions
 {
-    public static IQueryable<SlotEntity> ByGameVersion
-        (this DbSet<SlotEntity> set, GameVersion gameVersion, bool includeSublevels = false, bool includeCreator = false)
-        => set.AsQueryable().ByGameVersion(gameVersion, includeSublevels, includeCreator);
-
-    public static IQueryable<SlotEntity> ByGameVersion
-        (this IQueryable<SlotEntity> query, GameVersion gameVersion, bool includeSublevels = false, bool includeCreator = false, bool includeDeveloperLevels = false)
-    {
-        query = query.Where(s => s.Type == SlotType.User || (s.Type == SlotType.Developer && includeDeveloperLevels));
-
-        if (gameVersion == GameVersion.LittleBigPlanetVita || gameVersion == GameVersion.LittleBigPlanetPSP || gameVersion == GameVersion.Unknown)
-        {
-            query = query.Where(s => s.GameVersion == gameVersion);
-        }
-        else
-        {
-            query = query.Where(s => s.GameVersion <= gameVersion);
-        }
-
-        if (!includeSublevels) query = query.Where(s => !s.SubLevel);
-
-        return query;
-    }
-
-    public static IQueryable<ReviewEntity> ByGameVersion(this IQueryable<ReviewEntity> queryable, GameVersion gameVersion, bool includeSublevels = false)
-    {
-        IQueryable<ReviewEntity> query = queryable;
-
-        if (gameVersion == GameVersion.LittleBigPlanetVita || gameVersion == GameVersion.LittleBigPlanetPSP || gameVersion == GameVersion.Unknown)
-        {
-            query = query.Where(r => r.Slot.GameVersion == gameVersion);
-        }
-        else
-        {
-            query = query.Where(r => r.Slot.GameVersion <= gameVersion);
-        }
-
-        if (!includeSublevels) query = query.Where(r => !r.Slot.SubLevel);
-
-        return query;
-    }
-
     public static async Task<bool> Has<T>(this IQueryable<T> queryable, Expression<Func<T, bool>> predicate) 
         => await queryable.FirstOrDefaultAsync(predicate) != null;
 

ProjectLighthouse/Extensions/PredicateExtensions.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Linq.Expressions;
+
+namespace LBPUnion.ProjectLighthouse.Extensions;
+
+public static class PredicateExtensions
+{
+    public static Expression<Func<T, bool>> True<T>()
+    {
+        return f => true;
+    }
+
+    public static Expression<Func<T, bool>> False<T>()
+    {
+        return f => false;
+    }
+
+    public static Expression<Func<T, bool>> Or<T>(this Expression<Func<T, bool>> expr1, Expression<Func<T, bool>> expr2)
+    {
+        InvocationExpression invokedExpr = Expression.Invoke(expr2, expr1.Parameters);
+        return Expression.Lambda<Func<T, bool>>(Expression.OrElse(expr1.Body, invokedExpr), expr1.Parameters);
+    }
+
+    public static Expression<Func<T, bool>> And<T>
+        (this Expression<Func<T, bool>> expr1, Expression<Func<T, bool>> expr2)
+    {
+        InvocationExpression invokedExpr = Expression.Invoke(expr2, expr1.Parameters);
+        return Expression.Lambda<Func<T, bool>>(Expression.AndAlso(expr1.Body, invokedExpr), expr1.Parameters);
+    }
+}

ProjectLighthouse/Extensions/QueryExtensions.cs

@@ -1,6 +1,11 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using LBPUnion.ProjectLighthouse.Logging;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Types.Logging;
+using Microsoft.EntityFrameworkCore;
 
 namespace LBPUnion.ProjectLighthouse.Extensions;
 
@@ -8,4 +13,19 @@ public static class QueryExtensions
 {
     public static List<T2> ToSerializableList<T, T2>(this IEnumerable<T> enumerable, Func<T, T2> selector)
         => enumerable.Select(selector).ToList();
+
+    public static IQueryable<T> ApplyPagination<T>(this IQueryable<T> queryable, PaginationData pagination)
+    {
+        if (pagination.MaxElements <= 0)
+        {
+            Logger.Warn($"ApplyPagination() called with MaxElements of {pagination.MaxElements}\n{queryable.ToQueryString()}", LogArea.Database);
+            pagination.MaxElements = pagination.PageSize;
+        }
+        queryable = queryable.Skip(Math.Max(0, pagination.PageStart - 1));
+        return queryable.Take(Math.Min(pagination.PageSize, Math.Min(1000, pagination.MaxElements)));
+    }
+
+    public static IOrderedQueryable<T> ApplyOrdering<T>
+        (this IQueryable<T> queryable, ISortBuilder<T> sortBuilder) =>
+        sortBuilder.Build(queryable);
 }

ProjectLighthouse/Extensions/RequestExtensions.cs

@@ -1,5 +1,7 @@
 #nullable enable
 using System.Text.RegularExpressions;
+using LBPUnion.ProjectLighthouse.Configuration;
+using LBPUnion.ProjectLighthouse.Types.Filter;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Net.Http.Headers;
 
@@ -7,6 +9,25 @@ namespace LBPUnion.ProjectLighthouse.Extensions;
 
 public static partial class RequestExtensions
 {
+
+    public static PaginationData GetPaginationData(this HttpRequest request)
+    {
+        int start = int.TryParse(request.Query["pageStart"], out int pageStart) ? pageStart : 0;
+        int size = int.TryParse(request.Query["pageSize"], out int pageSize)
+            ? pageSize
+            : ServerConfiguration.Instance.UserGeneratedContentLimits.EntitledSlots;
+
+        if (start < 0) start = 0;
+        if (size <= 0) size = 10;
+
+        PaginationData paginationData = new()
+        {
+            PageStart = start,
+            PageSize = size,
+        };
+        return paginationData;
+    }
+
     #region Mobile Checking
 
     // yoinked and adapted from https://stackoverflow.com/a/68641796

ProjectLighthouse/Filter/Filters/AdventureFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class AdventureFilter : ISlotFilter
+{
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => s.IsAdventurePlanet);
+}

ProjectLighthouse/Filter/Filters/AuthorLabelFilter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Linq;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class AuthorLabelFilter : ISlotFilter
+{
+    private readonly string[] labels;
+
+    public AuthorLabelFilter(params string[] labels)
+    {
+        this.labels = labels;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.True<SlotEntity>();
+        predicate = this.labels.Aggregate(predicate,
+            (current, label) => current.And(s => s.AuthorLabels.Contains(label)));
+        return predicate;
+    }
+}

ProjectLighthouse/Filter/Filters/CreatorFilter.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class CreatorFilter : ISlotFilter
+{
+    private readonly int creatorId;
+
+    public CreatorFilter(int creatorId)
+    {
+        this.creatorId = creatorId;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => s.CreatorId == this.creatorId);
+}

ProjectLighthouse/Filter/Filters/CrossControlFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class CrossControlFilter : ISlotFilter
+{
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => s.CrossControllerRequired);
+}

ProjectLighthouse/Filter/Filters/ExcludeAdventureFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class ExcludeAdventureFilter : ISlotFilter
+{
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => !s.IsAdventurePlanet);
+}

ProjectLighthouse/Filter/Filters/ExcludeLBP1OnlyFilter.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Users;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class ExcludeLBP1OnlyFilter : ISlotFilter
+{
+    private readonly int userId;
+    private readonly GameVersion targetGameVersion;
+
+    public ExcludeLBP1OnlyFilter(int userId, GameVersion targetGameVersion)
+    {
+        this.userId = userId;
+        this.targetGameVersion = targetGameVersion;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.True<SlotEntity>();
+        predicate = predicate.And(s => !s.Lbp1Only || s.CreatorId == this.userId || this.targetGameVersion == GameVersion.LittleBigPlanet1);
+        return predicate;
+    }
+}

ProjectLighthouse/Filter/Filters/ExcludeMovePackFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class ExcludeMovePackFilter : ISlotFilter
+{
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => !s.MoveRequired);
+}

ProjectLighthouse/Filter/Filters/FirstUploadedFilter.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class FirstUploadedFilter : ISlotFilter
+{
+    private readonly long start;
+    private readonly long end;
+
+    public FirstUploadedFilter(long start, long end = long.MaxValue)
+    {
+        this.start = start;
+        this.end = end;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.True<SlotEntity>();
+        predicate = predicate.And(s => s.FirstUploaded > this.start);
+
+        // Exclude to optimize query
+        if (this.end != long.MaxValue) predicate = predicate.And(s => s.FirstUploaded < this.end);
+
+        return predicate;
+    }
+}

ProjectLighthouse/Filter/Filters/GameVersionFilter.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Users;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class GameVersionFilter : ISlotFilter
+{
+    private readonly GameVersion targetVersion;
+    private readonly bool matchExactly;
+
+    public GameVersionFilter(GameVersion targetVersion, bool matchExactly = false)
+    {
+        this.targetVersion = targetVersion;
+        this.matchExactly = matchExactly;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.True<SlotEntity>();
+        predicate = this.matchExactly || this.targetVersion is GameVersion.LittleBigPlanetVita or GameVersion.LittleBigPlanetPSP or GameVersion.Unknown
+                ? predicate.And(s => s.GameVersion == this.targetVersion)
+                : predicate.And(s => s.GameVersion <= this.targetVersion);
+        return predicate;
+    }
+}

ProjectLighthouse/Filter/Filters/GameVersionListFilter.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Linq;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Users;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class GameVersionListFilter : ISlotFilter
+{
+    private readonly GameVersion[] versions;
+
+    public GameVersionListFilter(params GameVersion[] versions)
+    {
+        this.versions = versions;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        this.versions.Aggregate(PredicateExtensions.False<SlotEntity>(),
+            (current, version) => current.Or(s => s.GameVersion == version));
+}

ProjectLighthouse/Filter/Filters/HiddenSlotFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class HiddenSlotFilter : ISlotFilter
+{
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => !s.Hidden);
+}

ProjectLighthouse/Filter/Filters/MovePackFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class MovePackFilter : ISlotFilter
+{
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => s.MoveRequired);
+}

ProjectLighthouse/Filter/Filters/PlayerCountFilter.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class PlayerCountFilter : ISlotFilter
+{
+    private readonly int minPlayers;
+    private readonly int maxPlayers;
+
+    public PlayerCountFilter(int minPlayers = 1, int maxPlayers = 4)
+    {
+        this.minPlayers = minPlayers;
+        this.maxPlayers = maxPlayers;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.True<SlotEntity>();
+        predicate = predicate.And(s => s.MinimumPlayers >= this.minPlayers);
+        predicate = predicate.And(s => s.MaximumPlayers <= this.maxPlayers);
+
+        return predicate;
+    }
+}

ProjectLighthouse/Filter/Filters/ResultTypeFilter.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Linq;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class ResultTypeFilter : ISlotFilter
+{
+    private readonly string[] results;
+
+    public ResultTypeFilter(params string[] results)
+    {
+        this.results = results;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        this.results.Contains("slot")
+            ? PredicateExtensions.True<SlotEntity>()
+            : PredicateExtensions.False<SlotEntity>();
+}

ProjectLighthouse/Filter/Filters/SlotIdFilter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class SlotIdFilter : ISlotFilter
+{
+    private readonly List<int> slotIds;
+
+    public SlotIdFilter(List<int> slotIds)
+    {
+        this.slotIds = slotIds;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.False<SlotEntity>();
+        predicate = this.slotIds.Aggregate(predicate, (current, slotId) => current.Or(s => s.SlotId == slotId));
+        return predicate;
+    }
+}

ProjectLighthouse/Filter/Filters/SlotTypeFilter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+using LBPUnion.ProjectLighthouse.Types.Levels;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class SlotTypeFilter : ISlotFilter
+{
+    private readonly SlotType slotType;
+
+    public SlotTypeFilter(SlotType slotType)
+    {
+        this.slotType = slotType;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => s.Type == this.slotType);
+}

ProjectLighthouse/Filter/Filters/SubLevelFilter.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class SubLevelFilter : ISlotFilter
+{
+    private readonly int userId;
+
+    public SubLevelFilter(int userId)
+    {
+        this.userId = userId;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => !s.SubLevel || s.CreatorId == this.userId);
+}

ProjectLighthouse/Filter/Filters/TeamPickFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class TeamPickFilter : ISlotFilter
+{
+    public Expression<Func<SlotEntity, bool>> GetPredicate() =>
+        PredicateExtensions.True<SlotEntity>().And(s => s.TeamPick);
+}

ProjectLighthouse/Filter/Filters/TextFilter.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Filters;
+
+public class TextFilter : ISlotFilter
+{
+    private readonly string filter;
+
+    public TextFilter(string filter)
+    {
+        this.filter = filter;
+    }
+
+    public Expression<Func<SlotEntity, bool>> GetPredicate()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.False<SlotEntity>();
+        string[] keywords = this.filter.Split(" ", StringSplitOptions.RemoveEmptyEntries);
+        foreach (string keyword in keywords)
+        {
+            predicate = predicate.Or(s =>
+                s.Name.Contains(keyword) ||
+                s.Description.ToLower().Contains(keyword) ||
+                s.SlotId.ToString().Equals(keyword));
+            predicate = predicate.Or(s => s.Creator != null && s.Creator.Username.Contains(keyword));
+        }
+        return predicate;
+    }
+}

ProjectLighthouse/Filter/SlotQueryBuilder.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Extensions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter;
+
+namespace LBPUnion.ProjectLighthouse.Filter;
+
+public class SlotQueryBuilder : IQueryBuilder<SlotEntity>
+{
+    private readonly List<ISlotFilter> filters;
+
+    public SlotQueryBuilder()
+    {
+        this.filters = new List<ISlotFilter>();
+    }
+
+    public Expression<Func<SlotEntity, bool>> Build()
+    {
+        Expression<Func<SlotEntity, bool>> predicate = PredicateExtensions.True<SlotEntity>();
+        predicate = this.filters.Aggregate(predicate, (current, filter) => current.And(filter.GetPredicate()));
+        return predicate;
+    }
+
+    public SlotQueryBuilder RemoveFilter(Type type)
+    {
+        this.filters.RemoveAll(f => f.GetType() == type);
+        return this;
+    }
+
+    #nullable enable
+    public IEnumerable<ISlotFilter> GetFilters(Type type) => this.filters.Where(f => f.GetType() == type).ToList();
+    #nullable disable
+
+    public SlotQueryBuilder AddFilter(int index, ISlotFilter filter)
+    {
+        this.filters.Insert(index, filter);
+        return this;
+    }
+
+    public SlotQueryBuilder Clone()
+    {
+        SlotQueryBuilder clone = new();
+        clone.filters.AddRange(this.filters);
+        return clone;
+    }
+
+    public SlotQueryBuilder AddFilter(ISlotFilter filter)
+    {
+        this.filters.Add(filter);
+        return this;
+    }
+}

ProjectLighthouse/Filter/SlotSortBuilder.cs

@@ -0,0 +1,56 @@
+using System.Collections.Generic;
+using System.Linq;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+namespace LBPUnion.ProjectLighthouse.Filter;
+
+public class SlotSortBuilder<T> : ISortBuilder<T>
+{
+    private readonly List<ISort<T>> sorts;
+    private bool sortDescending;
+
+    public SlotSortBuilder()
+    {
+        this.sorts = new List<ISort<T>>();
+        this.sortDescending = true;
+    }
+
+    public SlotSortBuilder<T> AddSort(ISort<T> sort)
+    {
+        this.sorts.Add(sort);
+        return this;
+    }
+
+    public SlotSortBuilder<T> SortDescending(bool descending)
+    {
+        this.sortDescending = descending;
+        return this;
+    }
+
+    public IOrderedQueryable<T> Build(IQueryable<T> queryable)
+    {
+        IOrderedQueryable<T> orderedQueryable = (IOrderedQueryable<T>)queryable;
+        // Probably not the best way to do this but to convert from IQueryable to IOrderedQueryable you have to 
+        // OrderBy some field before you can call ThenBy. One way to do this is call OrderBy(s => 0) but this
+        // generates some extra SQL so I've settled on this
+        bool usedFirstOrder = false;
+        foreach (ISort<T> sort in this.sorts)
+        {
+            if (this.sortDescending)
+            {
+                orderedQueryable = !usedFirstOrder
+                    ? orderedQueryable.OrderByDescending(sort.GetExpression())
+                    : orderedQueryable.ThenByDescending(sort.GetExpression());
+            }
+            else
+            {
+                orderedQueryable = !usedFirstOrder
+                    ? orderedQueryable.OrderBy(sort.GetExpression())
+                    : orderedQueryable.ThenBy(sort.GetExpression());
+            }
+
+            usedFirstOrder = true;
+        }
+        return orderedQueryable;
+    }
+}

ProjectLighthouse/Filter/Sorts/FirstUploadedSort.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class FirstUploadedSort : ISlotSort
+{
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() => s => s.FirstUploaded;
+}

ProjectLighthouse/Filter/Sorts/LastUpdatedSort.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class LastUpdatedSort : ISlotSort
+{
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() => s => s.LastUpdated;
+}

ProjectLighthouse/Filter/Sorts/Metadata/HeartsSort.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Types.Misc;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts.Metadata;
+
+public class HeartsSort : ISort<SlotMetadata>
+{
+    public Expression<Func<SlotMetadata, dynamic>> GetExpression() => s => s.Hearts;
+}

ProjectLighthouse/Filter/Sorts/Metadata/RatingLBP1Sort.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Types.Misc;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts.Metadata;
+
+public class RatingLBP1Sort : ISort<SlotMetadata>
+{
+    public Expression<Func<SlotMetadata, dynamic>> GetExpression() => s => s.RatingLbp1;
+}

ProjectLighthouse/Filter/Sorts/Metadata/ThumbsUpSort.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Types.Misc;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts.Metadata;
+
+public class ThumbsUpSort : ISort<SlotMetadata>
+{
+    public Expression<Func<SlotMetadata, dynamic>> GetExpression() => s => s.ThumbsUp;
+}

ProjectLighthouse/Filter/Sorts/PlaysForGameSort.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Types.Users;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class PlaysForGameSort : ISlotSort
+{
+    private readonly GameVersion targetVersion;
+
+    public PlaysForGameSort(GameVersion targetVersion)
+    {
+        this.targetVersion = targetVersion;
+    }
+
+    private string GetColName() =>
+        this.targetVersion switch
+        {
+            GameVersion.LittleBigPlanet1 => "LBP1",
+            GameVersion.LittleBigPlanet2 => "LBP2",
+            GameVersion.LittleBigPlanet3 => "LBP3",
+            GameVersion.LittleBigPlanetVita => "LBP2",
+            _ => "",
+        };
+
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() => s => EF.Property<dynamic>(s, $"Plays{this.GetColName()}");
+}

ProjectLighthouse/Filter/Sorts/RandomFirstUploadedSort.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class RandomFirstUploadedSort : ISlotSort
+{
+    private const double biasFactor = .8f;
+
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() =>
+        s => EF.Functions.Random() * (s.FirstUploaded * biasFactor);
+}

ProjectLighthouse/Filter/Sorts/RandomSort.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class RandomSort : ISlotSort
+{
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() => _ => EF.Functions.Random();
+}

ProjectLighthouse/Filter/Sorts/SlotIdSort.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class SlotIdSort : ISlotSort
+{
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() => s => s.SlotId;
+}

ProjectLighthouse/Filter/Sorts/TotalPlaysSort.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class TotalPlaysSort : ISlotSort
+{
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() => s => s.PlaysLBP1 + s.PlaysLBP2 + s.PlaysLBP3;
+}

ProjectLighthouse/Filter/Sorts/UniquePlaysForGameSort.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+using LBPUnion.ProjectLighthouse.Types.Users;
+using Microsoft.EntityFrameworkCore;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class UniquePlaysForGameSort : ISlotSort
+{
+    private readonly GameVersion targetVersion;
+
+    public UniquePlaysForGameSort(GameVersion targetVersion)
+    {
+        this.targetVersion = targetVersion;
+    }
+
+    private string GetColName() =>
+        this.targetVersion switch
+        {
+            GameVersion.LittleBigPlanet1 => "LBP1",
+            GameVersion.LittleBigPlanet2 => "LBP2",
+            GameVersion.LittleBigPlanet3 => "LBP3",
+            GameVersion.LittleBigPlanetVita => "LBP2",
+            _ => "",
+        };
+
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() => s => EF.Property<dynamic>(s, $"Plays{this.GetColName()}Unique");
+}

ProjectLighthouse/Filter/Sorts/UniquePlaysTotalSort.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Linq.Expressions;
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+namespace LBPUnion.ProjectLighthouse.Filter.Sorts;
+
+public class UniquePlaysTotalSort : ISlotSort
+{
+    public Expression<Func<SlotEntity, dynamic>> GetExpression() =>
+        s => s.PlaysLBP1Unique + s.PlaysLBP2Unique + s.PlaysLBP3Unique;
+}

ProjectLighthouse/Helpers/SlotHelper.cs

@@ -4,9 +4,11 @@ using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Logging;
 using LBPUnion.ProjectLighthouse.Types.Entities.Level;
 using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
 using LBPUnion.ProjectLighthouse.Types.Levels;
+using LBPUnion.ProjectLighthouse.Types.Logging;
 using LBPUnion.ProjectLighthouse.Types.Users;
 using Microsoft.EntityFrameworkCore;
 
@@ -14,7 +16,6 @@ namespace LBPUnion.ProjectLighthouse.Helpers;
 
 public static class SlotHelper
 {
-
     public static SlotType ParseType(string? slotType)
     {
         if (slotType == null) return SlotType.Unknown;
@@ -41,7 +42,8 @@ public static class SlotHelper
         };
     }
 
-    private static readonly SemaphoreSlim semaphore = new(1, 1);
+    private static readonly SemaphoreSlim slotSemaphore = new(1, 1);
+    private static readonly SemaphoreSlim userSemaphore = new(1, 1);
 
     public static async Task<int> GetPlaceholderUserId(DatabaseContext database)
     {
@@ -50,7 +52,13 @@ public static class SlotHelper
             .FirstOrDefaultAsync();
         if (devCreatorId != 0) return devCreatorId;
 
-        await semaphore.WaitAsync(TimeSpan.FromSeconds(5));
+        bool acquired = await userSemaphore.WaitAsync(TimeSpan.FromSeconds(5));
+        if (!acquired)
+        {
+            Logger.Warn($"Failed to acquire lock for placeholder user, semaphoreCount={userSemaphore.CurrentCount}",
+                LogArea.Synchronization);
+            return 0;
+        }
         try
         {
             UserEntity devCreator = new()
@@ -66,7 +74,7 @@ public static class SlotHelper
         }
         finally
         {
-            semaphore.Release();
+            if (acquired) userSemaphore.Release();
         }
     }
 
@@ -75,7 +83,14 @@ public static class SlotHelper
         int slotId = await database.Slots.Where(s => s.Type == slotType && s.InternalSlotId == guid).Select(s => s.SlotId).FirstOrDefaultAsync();
         if (slotId != 0) return slotId;
 
-        await semaphore.WaitAsync(TimeSpan.FromSeconds(5));
+        bool acquired = await slotSemaphore.WaitAsync(TimeSpan.FromSeconds(5));
+        if (!acquired)
+        {
+            Logger.Warn(
+                $"Failed to acquire lock for placeholder slot, guid={guid}, slotType={slotType}, semaphoreCount={slotSemaphore.CurrentCount}",
+                LogArea.Synchronization);
+            return 0;
+        }
         try
         {
             // if two requests come in at the same time for the same story level which hasn't been generated
@@ -104,7 +119,7 @@ public static class SlotHelper
         }
         finally
         {
-            semaphore.Release();
+            if(acquired) slotSemaphore.Release();
         }
     }
 }

ProjectLighthouse/Helpers/StatisticsHelper.cs

@@ -1,9 +1,7 @@
 using System.Linq;
 using System.Threading.Tasks;
 using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Extensions;
-using LBPUnion.ProjectLighthouse.Types.Levels;
-using LBPUnion.ProjectLighthouse.Types.Matchmaking.Rooms;
+using LBPUnion.ProjectLighthouse.Filter;
 using LBPUnion.ProjectLighthouse.Types.Users;
 using Microsoft.EntityFrameworkCore;
 
@@ -17,18 +15,12 @@ public static class StatisticsHelper
     public static async Task<int> RecentMatchesForGame(DatabaseContext database, GameVersion gameVersion)
         => await database.LastContacts.Where(l => TimeHelper.Timestamp - l.Timestamp < 300 && l.GameVersion == gameVersion).CountAsync();
 
-    public static async Task<int> SlotCount(DatabaseContext database) => await database.Slots.Where(s => s.Type == SlotType.User).CountAsync();
-
-    public static async Task<int> SlotCountForGame(DatabaseContext database, GameVersion gameVersion, bool includeSublevels = false) => await database.Slots.ByGameVersion(gameVersion, includeSublevels).CountAsync();
+    public static async Task<int> SlotCount(DatabaseContext database, SlotQueryBuilder queryBuilder) => await database.Slots.Where(queryBuilder.Build()).CountAsync();
 
     public static async Task<int> UserCount(DatabaseContext database) => await database.Users.CountAsync(u => u.PermissionLevel != PermissionLevel.Banned);
 
     public static int RoomCountForPlatform(Platform targetPlatform) => RoomHelper.Rooms.Count(r => r.IsLookingForPlayers && r.RoomPlatform == targetPlatform);
 
-    public static async Task<int> TeamPickCount(DatabaseContext database) => await database.Slots.CountAsync(s => s.TeamPick);
-
-    public static async Task<int> TeamPickCountForGame(DatabaseContext database, GameVersion gameVersion, bool? crosscontrol = null) => await database.Slots.ByGameVersion(gameVersion).CountAsync(s => s.TeamPick && (crosscontrol == null || s.CrossControllerRequired == crosscontrol));
-
     public static async Task<int> PhotoCount(DatabaseContext database) => await database.Photos.CountAsync();
     
     #region Moderator/Admin specific

ProjectLighthouse/Mail/MailQueueService.cs

@@ -34,7 +34,7 @@ public class MailQueueService : IMailService, IDisposable
         this.emailThread = Task.Factory.StartNew(this.EmailQueue);
     }
 
-    private async void EmailQueue()
+    private async Task EmailQueue()
     {
         while (!this.stopSignal)
         {

ProjectLighthouse/Types/Filter/IFilter.cs

@@ -0,0 +1,9 @@
+using System;
+using System.Linq.Expressions;
+
+namespace LBPUnion.ProjectLighthouse.Types.Filter;
+
+public interface IFilter<T>
+{
+    public Expression<Func<T, bool>> GetPredicate();
+}

ProjectLighthouse/Types/Filter/IQueryBuilder.cs

@@ -0,0 +1,9 @@
+using System;
+using System.Linq.Expressions;
+
+namespace LBPUnion.ProjectLighthouse.Types.Filter;
+
+public interface IQueryBuilder<T>
+{
+    public Expression<Func<T, bool>> Build();
+}

ProjectLighthouse/Types/Filter/ISlotFilter.cs

@@ -0,0 +1,6 @@
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+
+namespace LBPUnion.ProjectLighthouse.Types.Filter;
+
+public interface ISlotFilter : IFilter<SlotEntity>
+{ }

ProjectLighthouse/Types/Filter/PaginationData.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace LBPUnion.ProjectLighthouse.Types.Filter;
+
+public struct PaginationData
+{
+    public PaginationData()
+    { }
+
+    public int PageStart { get; init; } = 0;
+    public int PageSize { get; init; } = 0;
+    public int TotalElements { get; set; } = 0;
+    public int MaxElements { get; set; } = 30;
+
+    public int HintStart => this.PageStart + Math.Min(this.PageSize, this.MaxElements);
+}

ProjectLighthouse/Types/Filter/Sorts/ISlotSort.cs

@@ -0,0 +1,6 @@
+using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+
+namespace LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+public interface ISlotSort : ISort<SlotEntity>
+{ }

ProjectLighthouse/Types/Filter/Sorts/ISort.cs

@@ -0,0 +1,9 @@
+using System;
+using System.Linq.Expressions;
+
+namespace LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+public interface ISort<T>
+{
+    public Expression<Func<T, dynamic>> GetExpression();
+}

ProjectLighthouse/Types/Filter/Sorts/ISortBuilder.cs

@@ -0,0 +1,8 @@
+using System.Linq;
+
+namespace LBPUnion.ProjectLighthouse.Types.Filter.Sorts;
+
+public interface ISortBuilder<T>
+{
+    public IOrderedQueryable<T> Build(IQueryable<T> queryable);
+}

ProjectLighthouse/Types/Levels/Category.cs

@@ -1,49 +1,31 @@
 #nullable enable
 using System.Collections.Generic;
-using System.Xml.Serialization;
+using System.Threading.Tasks;
 using LBPUnion.ProjectLighthouse.Database;
-using LBPUnion.ProjectLighthouse.Types.Entities.Level;
+using LBPUnion.ProjectLighthouse.Filter;
+using LBPUnion.ProjectLighthouse.Types.Entities.Token;
 using LBPUnion.ProjectLighthouse.Types.Serialization;
-using LBPUnion.ProjectLighthouse.Types.Users;
 
 namespace LBPUnion.ProjectLighthouse.Types.Levels;
 
-[XmlType("category")]
-[XmlRoot("category")]
 public abstract class Category
 {
-    [XmlElement("name")]
     public abstract string Name { get; set; }
 
-    [XmlElement("description")]
     public abstract string Description { get; set; }
 
-    [XmlElement("icon")]
     public abstract string IconHash { get; set; }
 
-    [XmlIgnore]
     public abstract string Endpoint { get; set; }
 
-    [XmlElement("url")]
-    public string IngameEndpoint {
-        get => $"/searches/{this.Endpoint}";
-        set => this.Endpoint = value.Replace("/searches/", "");
-    }
+    public string[] Sorts { get; } = { "relevance", "likes", "plays", "hearts", "date", };
 
-    public abstract SlotEntity? GetPreviewSlot(DatabaseContext database);
+    public abstract string[] Types { get; }
 
-    public abstract IEnumerable<SlotEntity> GetSlots(DatabaseContext database, int pageStart, int pageSize);
+    public abstract string Tag { get; }
 
-    public abstract int GetTotalSlots(DatabaseContext database);
+    public string IngameEndpoint => $"/searches/{this.Endpoint}";
 
-    public GameCategory Serialize(DatabaseContext database)
-    {
-        List<SlotBase> slots = new();
-        SlotEntity? previewSlot = this.GetPreviewSlot(database);
-        if (previewSlot != null)
-            slots.Add(SlotBase.CreateFromEntity(previewSlot, GameVersion.LittleBigPlanet3, -1));
-        
-        int totalSlots = this.GetTotalSlots(database);
-        return GameCategory.CreateFromEntity(this, new GenericSlotResponse(slots, totalSlots, 2));
-    }
+    public virtual Task<GameCategory> Serialize(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder, int numResults = 1) =>
+        Task.FromResult(GameCategory.CreateFromEntity(this, new GenericSerializableList(new List<ILbpSerializable>(), 0, 0)));
 }

ProjectLighthouse/Types/Logging/LogArea.cs

@@ -27,4 +27,5 @@ public enum LogArea
     Deserialization,
     Email,
     Serialization,
+    Synchronization,
 }

ProjectLighthouse/Types/Misc/SlotMetadata.cs

@@ -8,4 +8,5 @@ public class SlotMetadata
     public double RatingLbp1 { get; init; }
     public int ThumbsUp { get; init; }
     public int Hearts { get; init; }
+    public bool Played { get; set; }
 }

ProjectLighthouse/Types/Serialization/CategoryListResponse.cs

@@ -8,7 +8,7 @@ public class CategoryListResponse : ILbpSerializable
 {
     public CategoryListResponse() { }
 
-    public CategoryListResponse(List<GameCategory> categories, int total, int hint, int hintStart)
+    public CategoryListResponse(List<GameCategory> categories, int total, string hint, int hintStart)
     {
         this.Categories = categories;
         this.Total = total;
@@ -20,7 +20,7 @@ public class CategoryListResponse : ILbpSerializable
     public int Total { get; set; }
 
     [XmlAttribute("hint")]
-    public int Hint { get; set; }
+    public string Hint { get; set; } = "";
 
     [XmlAttribute("hint_start")]
     public int HintStart { get; set; }

ProjectLighthouse/Types/Serialization/GameCategory.cs

@@ -1,4 +1,5 @@
-using System.Xml.Serialization;
+using System.ComponentModel;
+using System.Xml.Serialization;
 using LBPUnion.ProjectLighthouse.Types.Levels;
 
 namespace LBPUnion.ProjectLighthouse.Types.Serialization;
@@ -18,19 +19,32 @@ public class GameCategory : ILbpSerializable
     [XmlElement("icon")]
     public string Icon { get; set; }
 
-    [XmlElement("results")]
-    public GenericSlotResponse Results { get; set; }
+    [DefaultValue("")]
+    [XmlArray("sorts")]
+    [XmlArrayItem("sort")]
+    public string[] Sorts { get; set; }
 
-    public static GameCategory CreateFromEntity(Category category, GenericSlotResponse results) =>
+    [DefaultValue("")]
+    [XmlArray("types")]
+    [XmlArrayItem("type")]
+    public string[] Types { get; set; }
+
+    [XmlElement("tag")]
+    public string Tag { get; set; }
+
+    [XmlElement("results")]
+    public GenericSerializableList Results { get; set; }
+
+    public static GameCategory CreateFromEntity(Category category, GenericSerializableList results) =>
         new()
         {
             Name = category.Name,
             Description = category.Description,
             Icon = category.IconHash,
             Url = category.IngameEndpoint,
+            Sorts = category.Sorts,
+            Types = category.Types,
+            Tag = category.Tag,
             Results = results,
         };
-
-
-
 }

ProjectLighthouse/Types/Serialization/GameDeveloperSlot.cs

@@ -33,10 +33,12 @@ public class GameDeveloperSlot : SlotBase, INeedsPreparationForSerialization
     public async Task PrepareSerialization(DatabaseContext database)
     {
         var stats = await database.Slots.Select(_ => new
-        {
-            CommentCount = database.Comments.Count(c => c.TargetId == this.SlotId && c.Type == CommentType.Level),
-            PhotoCount = database.Photos.Count(p => p.SlotId == this.SlotId),
-        }).FirstAsync();
+            {
+                CommentCount = database.Comments.Count(c => c.TargetId == this.SlotId && c.Type == CommentType.Level),
+                PhotoCount = database.Photos.Count(p => p.SlotId == this.SlotId),
+            })
+            .OrderBy(_ => 1)
+            .FirstAsync();
         ReflectionHelper.CopyAllFields(stats, this);
         this.PlayerCount = RoomHelper.Rooms
             .Where(r => r.Slot.SlotType == SlotType.Developer && r.Slot.SlotId == this.InternalSlotId)