rework users repository

Emby.Server.Implementations/Data/SqliteUserRepository.cs

@@ -0,0 +1,160 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Persistence;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.Serialization;
+using SQLitePCL.pretty;
+
+namespace Emby.Server.Implementations.Data
+{
+    /// <summary>
+    /// Class SQLiteUserRepository
+    /// </summary>
+    public class SqliteUserRepository : BaseSqliteRepository, IUserRepository
+    {
+        private readonly IJsonSerializer _jsonSerializer;
+        private readonly IMemoryStreamFactory _memoryStreamProvider;
+
+        public SqliteUserRepository(ILogger logger, IServerApplicationPaths appPaths, IJsonSerializer jsonSerializer, IMemoryStreamFactory memoryStreamProvider)
+            : base(logger)
+        {
+            _jsonSerializer = jsonSerializer;
+            _memoryStreamProvider = memoryStreamProvider;
+
+            DbFilePath = Path.Combine(appPaths.DataPath, "users.db");
+        }
+
+        /// <summary>
+        /// Gets the name of the repository
+        /// </summary>
+        /// <value>The name.</value>
+        public string Name
+        {
+            get
+            {
+                return "SQLite";
+            }
+        }
+
+        /// <summary>
+        /// Opens the connection to the database
+        /// </summary>
+        /// <returns>Task.</returns>
+        public void Initialize()
+        {
+            using (var connection = CreateConnection())
+            {
+                string[] queries = {
+
+                                "create table if not exists users (guid GUID primary key, data BLOB)",
+                                "create index if not exists idx_users on users(guid)",
+                                "create table if not exists schema_version (table_name primary key, version)",
+
+                                "pragma shrink_memory"
+                               };
+
+                connection.RunQueries(queries);
+            }
+        }
+
+        /// <summary>
+        /// Save a user in the repo
+        /// </summary>
+        /// <param name="user">The user.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        /// <exception cref="System.ArgumentNullException">user</exception>
+        public async Task SaveUser(User user, CancellationToken cancellationToken)
+        {
+            if (user == null)
+            {
+                throw new ArgumentNullException("user");
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            var serialized = _jsonSerializer.SerializeToBytes(user, _memoryStreamProvider);
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            lock (WriteLock)
+            {
+                using (var connection = CreateConnection())
+                {
+                    connection.RunInTransaction(db =>
+                    {
+                        var commandText = "replace into users (guid, data) values (?, ?)";
+
+                        db.Execute(commandText,
+                            user.Id.ToGuidParamValue(),
+                            serialized);
+                    });
+                }
+            }
+        }
+
+        /// <summary>
+        /// Retrieve all users from the database
+        /// </summary>
+        /// <returns>IEnumerable{User}.</returns>
+        public IEnumerable<User> RetrieveAllUsers()
+        {
+            var list = new List<User>();
+
+            using (var connection = CreateConnection(true))
+            {
+                foreach (var row in connection.Query("select guid,data from users"))
+                {
+                    var id = row[0].ReadGuid();
+
+                    using (var stream = _memoryStreamProvider.CreateNew(row[1].ToBlob()))
+                    {
+                        stream.Position = 0;
+                        var user = _jsonSerializer.DeserializeFromStream<User>(stream);
+                        user.Id = id;
+                        list.Add(user);
+                    }
+                }
+            }
+
+            return list;
+        }
+
+        /// <summary>
+        /// Deletes the user.
+        /// </summary>
+        /// <param name="user">The user.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        /// <exception cref="System.ArgumentNullException">user</exception>
+        public async Task DeleteUser(User user, CancellationToken cancellationToken)
+        {
+            if (user == null)
+            {
+                throw new ArgumentNullException("user");
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            lock (WriteLock)
+            {
+                using (var connection = CreateConnection())
+                {
+                    connection.RunInTransaction(db =>
+                    {
+                        var commandText = "delete from users where guid=?";
+
+                        db.Execute(commandText,
+                            user.Id.ToGuidParamValue());
+                    });
+                }
+            }
+        }
+    }
+}