Add proper implementation of fetching the level queue

DatabaseMigrations/7.sql

@@ -0,0 +1,17 @@
+create table QueuedLevels
+(
+    QueuedLevelId int,
+    UserId        int not null,
+    SlotId        int not null
+);
+
+create unique index QueuedLevels_QueuedLevelId_uindex
+    on QueuedLevels (QueuedLevelId);
+
+alter table QueuedLevels
+    add constraint QueuedLevels_pk
+        primary key (QueuedLevelId);
+
+alter table QueuedLevels
+    modify QueuedLevelId int auto_increment;
+

ProjectLighthouse/Controllers/LevelQueueController.cs

@@ -0,0 +1,27 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using ProjectLighthouse.Serialization;
+using ProjectLighthouse.Types;
+
+namespace ProjectLighthouse.Controllers {
+    [ApiController]
+    [Route("LITTLEBIGPLANETPS3_XML/")]
+    [Produces("text/xml")]
+    public class LevelQueueController : ControllerBase {
+        [HttpGet("slots/lolcatftw/{username}")]
+        public IActionResult GetLevelQueue(string username) {
+            IEnumerable<QueuedLevel> queuedLevels = new Database().QueuedLevels
+                .Include(q => q.User)
+                .Include(q => q.Slot)
+                .Where(q => q.User.Username == username)
+                .AsEnumerable();
+
+            string response = queuedLevels.Aggregate(string.Empty, (current, q) => current + q.Slot.Serialize());
+
+            return this.Ok(LbpSerializer.TaggedStringElement("slots", response, "total", 1));
+        }
+    }
+}

ProjectLighthouse/Database.cs

@@ -1,4 +1,4 @@
-#nullable enable
+//#nullable enable
 using System;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
@@ -11,6 +11,8 @@ namespace ProjectLighthouse {
         public DbSet<User> Users { get; set; }
         public DbSet<Location> Locations { get; set; }
         public DbSet<Slot> Slots { get; set; }
+        
+        public DbSet<QueuedLevel> QueuedLevels { get; set; }
         public DbSet<Comment> Comments { get; set; }
         public DbSet<Token> Tokens { get; set; }
         
@@ -39,6 +41,7 @@ namespace ProjectLighthouse {
 
         }
         
+        #nullable enable
         public async Task<Token?> AuthenticateUser(LoginData loginData) {
             // TODO: don't use psn name to authenticate
             User user = await this.Users.FirstOrDefaultAsync(u => u.Username == loginData.Username) 
@@ -70,5 +73,6 @@ namespace ProjectLighthouse {
             
             return await UserFromAuthToken(mmAuth);
         }
+        #nullable disable
     }
 }

ProjectLighthouse/Types/QueuedLevel.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+
+namespace ProjectLighthouse.Types {
+    public class QueuedLevel {
+        [Key] public int QueuedLevelId { get; set; }
+        
+        public int UserId { get; set; }
+
+        [ForeignKey(nameof(UserId))]
+        public User User { get; set; }
+        
+        public int SlotId { get; set; }
+
+        [ForeignKey(nameof(SlotId))]
+        public Slot Slot { get; set; }
+    }
+}