isolated sqlite dependancy

MediaBrowser.Server.Sqlite/SQLiteUserDataRepository.cs

@@ -0,0 +1,140 @@
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Persistence;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.Data;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Server.Sqlite
+{
+    /// <summary>
+    /// Class SQLiteUserDataRepository
+    /// </summary>
+    [Export(typeof(IUserDataRepository))]
+    public class SQLiteUserDataRepository : SqliteRepository, IUserDataRepository
+    {
+        /// <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>
+        /// Opens the connection to the database
+        /// </summary>
+        /// <returns>Task.</returns>
+        public async Task Initialize()
+        {
+            var dbFile = Path.Combine(Kernel.Instance.ApplicationPaths.DataPath, "userdata.db");
+
+            await ConnectToDB(dbFile).ConfigureAwait(false);
+
+            string[] queries = {
+
+                                "create table if not exists user_data (item_id GUID, user_id GUID, data BLOB)",
+                                "create unique index if not exists idx_user_data on user_data (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 user specific data 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 SaveUserData(BaseItem item, CancellationToken cancellationToken)
+        {
+            if (item == null)
+            {
+                throw new ArgumentNullException("item");
+            }
+
+            if (cancellationToken == null)
+            {
+                throw new ArgumentNullException("cancellationToken");
+            }
+            
+            return Task.Run(() =>
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+
+                var cmd = connection.CreateCommand();
+
+                cmd.CommandText = "delete from user_data where item_id = @guid";
+                cmd.AddParam("@guid", item.UserDataId);
+
+                QueueCommand(cmd);
+
+                if (item.UserData != null)
+                {
+                    foreach (var data in item.UserData)
+                    {
+                        cmd = connection.CreateCommand();
+                        cmd.CommandText = "insert into user_data (item_id, user_id, data) values (@1, @2, @3)";
+                        cmd.AddParam("@1", item.UserDataId);
+                        cmd.AddParam("@2", data.UserId);
+
+                        cmd.AddParam("@3", Kernel.Instance.ProtobufSerializer.SerializeToBytes(data));
+
+                        QueueCommand(cmd);
+                    }
+                }
+            });
+        }
+
+        /// <summary>
+        /// Gets user data for an item
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns>IEnumerable{UserItemData}.</returns>
+        /// <exception cref="System.ArgumentNullException"></exception>
+        public IEnumerable<UserItemData> RetrieveUserData(BaseItem item)
+        {
+            if (item == null)
+            {
+                throw new ArgumentNullException("item");
+            }
+
+            var cmd = connection.CreateCommand();
+            cmd.CommandText = "select data from user_data where item_id = @guid";
+            var guidParam = cmd.Parameters.Add("@guid", DbType.Guid);
+            guidParam.Value = item.UserDataId;
+
+            using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
+            {
+                while (reader.Read())
+                {
+                    using (var stream = GetStream(reader, 0))
+                    {
+                        var data = Kernel.Instance.ProtobufSerializer.DeserializeFromStream<UserItemData>(stream);
+                        if (data != null)
+                        {
+                            yield return data;
+                        }
+                    }
+                }
+            }
+        }
+    }
+}