Move model configuration to its own classes

Jellyfin.Server.Implementations/ModelConfiguration/UserConfiguration.cs

@@ -0,0 +1,62 @@
+using Jellyfin.Data.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace Jellyfin.Server.Implementations.ModelConfiguration
+{
+    /// <summary>
+    /// FluentAPI configuration for the User entity.
+    /// </summary>
+    public class UserConfiguration : IEntityTypeConfiguration<User>
+    {
+        /// <inheritdoc/>
+        public void Configure(EntityTypeBuilder<User> builder)
+        {
+            // Collations
+
+            builder
+                .Property(user => user.Username)
+                .UseCollation("NOCASE");
+
+            // Delete behavior
+
+            builder
+                .HasOne(u => u.ProfileImage)
+                .WithOne()
+                .OnDelete(DeleteBehavior.Cascade);
+
+            builder
+                .HasMany(u => u.Permissions)
+                .WithOne()
+                .HasForeignKey(p => p.UserId)
+                .OnDelete(DeleteBehavior.Cascade);
+
+            builder
+                .HasMany(u => u.Preferences)
+                .WithOne()
+                .HasForeignKey(p => p.UserId)
+                .OnDelete(DeleteBehavior.Cascade);
+
+            builder
+                .HasMany(u => u.AccessSchedules)
+                .WithOne()
+                .OnDelete(DeleteBehavior.Cascade);
+
+            builder
+                .HasMany(u => u.DisplayPreferences)
+                .WithOne()
+                .OnDelete(DeleteBehavior.Cascade);
+
+            builder
+                .HasMany(u => u.ItemDisplayPreferences)
+                .WithOne()
+                .OnDelete(DeleteBehavior.Cascade);
+
+            // Indexes
+
+            builder
+                .HasIndex(entity => entity.Username)
+                .IsUnique();
+        }
+    }
+}