Send email on account creation

ProjectLighthouse/Database.cs

@@ -45,7 +45,8 @@ public class Database : DbContext
     protected override void OnConfiguring(DbContextOptionsBuilder options)
         => options.UseMySql(ServerSettings.Instance.DbConnectionString, MySqlServerVersion.LatestSupportedServerVersion);
 
-    public async Task<User> CreateUser(string username, string password)
+    #nullable enable
+    public async Task<User> CreateUser(string username, string password, string? emailAddress = null)
     {
         if (!password.StartsWith('$')) throw new ArgumentException(nameof(password) + " is not a BCrypt hash");
 
@@ -59,8 +60,8 @@ public class Database : DbContext
             if (!regex.IsMatch(username)) throw new ArgumentException(nameof(username) + " does not match the username regex");
         }
 
-        User user;
-        if ((user = await this.Users.Where(u => u.Username == username).FirstOrDefaultAsync()) != null) return user;
+        User? user = await this.Users.Where(u => u.Username == username).FirstOrDefaultAsync();
+        if (user != null) return user;
 
         Location l = new(); // store to get id after submitting
         this.Locations.Add(l); // add to table
@@ -77,10 +78,17 @@ public class Database : DbContext
 
         await this.SaveChangesAsync();
 
+        if (emailAddress != null && ServerSettings.Instance.SMTPEnabled)
+        {
+            string body = "An account for Project Lighthouse has been registered with this email address.\n\n" +
+                          $"You can login at {ServerSettings.Instance.ExternalUrl}.";
+
+            SMTPHelper.SendEmail(emailAddress, "Account Created: " + username, body);
+        }
+
         return user;
     }
 
-    #nullable enable
     public async Task<GameToken?> AuthenticateUser(NPTicket npTicket, string userLocation)
     {
         User? user = await this.Users.FirstOrDefaultAsync(u => u.Username == npTicket.Username);

ProjectLighthouse/Migrations/20220301195426_AddEmailAddressToUser.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ProjectLighthouse.Migrations
+{
+    public partial class AddEmailAddressToUser : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "EmailAddress",
+                table: "Users",
+                type: "longtext",
+                nullable: true)
+                .Annotation("MySql:CharSet", "utf8mb4");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "EmailAddress",
+                table: "Users");
+        }
+    }
+}

ProjectLighthouse/Migrations/DatabaseModelSnapshot.cs

@@ -669,6 +669,9 @@ namespace ProjectLighthouse.Migrations
                     b.Property<string>("BooHash")
                         .HasColumnType("longtext");
 
+                    b.Property<string>("EmailAddress")
+                        .HasColumnType("longtext");
+
                     b.Property<int>("Game")
                         .HasColumnType("int");
 

ProjectLighthouse/Pages/RegisterForm.cshtml

@@ -43,6 +43,14 @@
         </div>
     </div>
 
+    <div class="field">
+        <label>Email address</label>
+        <div class="ui left icon input">
+            <input type="email" name="emailAddress" id="emailAddress" placeholder="Email Address">
+            <i class="mail icon"></i>
+        </div>
+    </div>
+
     <div class="field">
         <label>Password</label>
         <div class="ui left icon input">

ProjectLighthouse/Pages/RegisterForm.cshtml.cs

@@ -21,7 +21,7 @@ public class RegisterForm : BaseLayout
 
     [UsedImplicitly]
     [SuppressMessage("ReSharper", "SpecifyStringComparison")]
-    public async Task<IActionResult> OnPost(string username, string password, string confirmPassword)
+    public async Task<IActionResult> OnPost(string username, string password, string confirmPassword, string emailAddress)
     {
         if (!ServerSettings.Instance.RegistrationEnabled) return this.NotFound();
 
@@ -37,6 +37,12 @@ public class RegisterForm : BaseLayout
             return this.Page();
         }
 
+        if (string.IsNullOrWhiteSpace(emailAddress))
+        {
+            this.Error = "Email address field is required.";
+            return this.Page();
+        }
+
         if (password != confirmPassword)
         {
             this.Error = "Passwords do not match!";
@@ -55,7 +61,7 @@ public class RegisterForm : BaseLayout
             return this.Page();
         }
 
-        User user = await this.Database.CreateUser(username, HashHelper.BCryptHash(password));
+        User user = await this.Database.CreateUser(username, HashHelper.BCryptHash(password), emailAddress);
 
         WebToken webToken = new()
         {

ProjectLighthouse/Types/User.cs

@@ -13,6 +13,11 @@ public class User
     public int UserId { get; set; }
     public string Username { get; set; }
 
+    #nullable enable
+    [JsonIgnore]
+    public string? EmailAddress { get; set; } = null;
+    #nullable disable
+
     [JsonIgnore]
     public string Password { get; set; }