More DI

MediaBrowser.Server.Implementations/Sqlite/SQLiteDisplayPreferencesRepository.cs

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+using MediaBrowser.Common.Kernel;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Persistence;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.Serialization;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Server.Implementations.Sqlite
+{
+    /// <summary>
+    /// Class SQLiteDisplayPreferencesRepository
+    /// </summary>
+    class SQLiteDisplayPreferencesRepository : SqliteRepository, IDisplayPreferencesRepository
+    {
+        /// <summary>
+        /// The repository name
+        /// </summary>
+        public const string RepositoryName = "SQLite";
+
+        /// <summary>
+        /// Gets the name of the repository
+        /// </summary>
+        /// <value>The name.</value>
+        public string Name
+        {
+            get
+            {
+                return RepositoryName;
+            }
+        }
+
+        /// <summary>
+        /// The _protobuf serializer
+        /// </summary>
+        private readonly IProtobufSerializer _protobufSerializer;
+
+        /// <summary>
+        /// The _app paths
+        /// </summary>
+        private readonly IApplicationPaths _appPaths;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SQLiteUserDataRepository" /> class.
+        /// </summary>
+        /// <param name="appPaths">The app paths.</param>
+        /// <param name="protobufSerializer">The protobuf serializer.</param>
+        /// <param name="logger">The logger.</param>
+        /// <exception cref="System.ArgumentNullException">protobufSerializer</exception>
+        public SQLiteDisplayPreferencesRepository(IApplicationPaths appPaths, IProtobufSerializer protobufSerializer, ILogger logger)
+            : base(logger)
+        {
+            if (protobufSerializer == null)
+            {
+                throw new ArgumentNullException("protobufSerializer");
+            }
+            if (appPaths == null)
+            {
+                throw new ArgumentNullException("appPaths");
+            }
+
+            _protobufSerializer = protobufSerializer;
+            _appPaths = appPaths;
+        }
+
+        /// <summary>
+        /// Opens the connection to the database
+        /// </summary>
+        /// <returns>Task.</returns>
+        public async Task Initialize()
+        {
+            var dbFile = Path.Combine(_appPaths.DataPath, "displaypreferences.db");
+
+            await ConnectToDB(dbFile).ConfigureAwait(false);
+
+            string[] queries = {
+
+                                "create table if not exists display_prefs (item_id GUID, user_id GUID, data BLOB)",
+                                "create unique index if not exists idx_display_prefs on display_prefs (item_id, user_id)",
+                                "create table if not exists schema_version (table_name primary key, version)",
+                                //pragmas
+                                "pragma temp_store = memory"
+                               };
+
+            RunQueries(queries);
+        }
+
+        /// <summary>
+        /// Save the display preferences associated with an item in the repo
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        /// <exception cref="System.ArgumentNullException">item</exception>
+        public Task SaveDisplayPrefs(Folder item, CancellationToken cancellationToken)
+        {
+            if (item == null)
+            {
+                throw new ArgumentNullException("item");
+            }
+
+            if (cancellationToken == null)
+            {
+                throw new ArgumentNullException("cancellationToken");
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            return Task.Run(() =>
+            {
+                var cmd = connection.CreateCommand();
+
+                cmd.CommandText = "delete from display_prefs where item_id = @guid";
+                cmd.AddParam("@guid", item.DisplayPrefsId);
+
+                QueueCommand(cmd);
+
+                if (item.DisplayPrefs != null)
+                {
+                    foreach (var data in item.DisplayPrefs)
+                    {
+                        cmd = connection.CreateCommand();
+                        cmd.CommandText = "insert into display_prefs (item_id, user_id, data) values (@1, @2, @3)";
+                        cmd.AddParam("@1", item.DisplayPrefsId);
+                        cmd.AddParam("@2", data.UserId);
+
+                        cmd.AddParam("@3", _protobufSerializer.SerializeToBytes(data));
+
+                        QueueCommand(cmd);
+                    }
+                }
+            });
+        }
+
+        /// <summary>
+        /// Gets display preferences for an item
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns>IEnumerable{DisplayPreferences}.</returns>
+        /// <exception cref="System.ArgumentNullException"></exception>
+        public IEnumerable<DisplayPreferences> RetrieveDisplayPrefs(Folder item)
+        {
+            if (item == null)
+            {
+                throw new ArgumentNullException("item");
+            }
+
+            var cmd = connection.CreateCommand();
+            cmd.CommandText = "select data from display_prefs where item_id = @guid";
+            var guidParam = cmd.Parameters.Add("@guid", DbType.Guid);
+            guidParam.Value = item.DisplayPrefsId;
+
+            using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
+            {
+                while (reader.Read())
+                {
+                    using (var stream = GetStream(reader, 0))
+                    {
+                        var data = _protobufSerializer.DeserializeFromStream<DisplayPreferences>(stream);
+                        if (data != null)
+                        {
+                            yield return data;
+                        }
+                    }
+                }
+            }
+        }
+    }
+}