Migrate Display Preferences to EF Core

MediaBrowser.Controller/IDisplayPreferencesManager.cs

@@ -0,0 +1,25 @@
+using System;
+using Jellyfin.Data.Entities;
+
+namespace MediaBrowser.Controller
+{
+    /// <summary>
+    /// Manages the storage and retrieval of display preferences.
+    /// </summary>
+    public interface IDisplayPreferencesManager
+    {
+        /// <summary>
+        /// Gets the display preferences for the user and client.
+        /// </summary>
+        /// <param name="userId">The user's id.</param>
+        /// <param name="client">The client string.</param>
+        /// <returns>The associated display preferences.</returns>
+        DisplayPreferences GetDisplayPreferences(Guid userId, string client);
+
+        /// <summary>
+        /// Saves changes to the provided display preferences.
+        /// </summary>
+        /// <param name="preferences">The display preferences to save.</param>
+        void SaveChanges(DisplayPreferences preferences);
+    }
+}