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using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Persistence;
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 SQLiteUserRepository
/// </summary>
public class SQLiteUserRepository : SqliteRepository, IUserRepository
{
/// <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>
/// Gets the json serializer.
/// </summary>
/// <value>The json serializer.</value>
private readonly IJsonSerializer _jsonSerializer;
/// <summary>
/// The _app paths
/// </summary>
private readonly IApplicationPaths _appPaths;
/// <summary>
/// Gets a value indicating whether [enable delayed commands].
/// </summary>
/// <value><c>true</c> if [enable delayed commands]; otherwise, <c>false</c>.</value>
protected override bool EnableDelayedCommands
{
get
{
return false;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SQLiteUserDataRepository" /> class.
/// </summary>
/// <param name="appPaths">The app paths.</param>
/// <param name="jsonSerializer">The json serializer.</param>
/// <param name="logManager">The log manager.</param>
/// <exception cref="System.ArgumentNullException">appPaths</exception>
public SQLiteUserRepository(IApplicationPaths appPaths, IJsonSerializer jsonSerializer, ILogManager logManager)
: base(logManager)
{
if (appPaths == null)
{
throw new ArgumentNullException("appPaths");
}
if (jsonSerializer == null)
{
throw new ArgumentNullException("jsonSerializer");
}
_appPaths = appPaths;
_jsonSerializer = jsonSerializer;
}
/// <summary>
/// Opens the connection to the database
/// </summary>
/// <returns>Task.</returns>
public async Task Initialize()
{
var dbFile = Path.Combine(_appPaths.DataPath, "users.db");
await ConnectToDb(dbFile).ConfigureAwait(false);
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)",
//pragmas
"pragma temp_store = memory"
};
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");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
cancellationToken.ThrowIfCancellationRequested();
var serialized = _jsonSerializer.SerializeToBytes(user);
cancellationToken.ThrowIfCancellationRequested();
using (var cmd = connection.CreateCommand())
{
cmd.CommandText = "replace into users (guid, data) values (@1, @2)";
cmd.AddParam("@1", user.Id);
cmd.AddParam("@2", serialized);
using (var tran = connection.BeginTransaction())
{
try
{
cmd.Transaction = tran;
await cmd.ExecuteNonQueryAsync(cancellationToken);
tran.Commit();
}
catch (OperationCanceledException)
{
tran.Rollback();
}
catch (Exception e)
{
Logger.ErrorException("Failed to commit transaction.", e);
tran.Rollback();
}
}
}
}
/// <summary>
/// Retrieve all users from the database
/// </summary>
/// <returns>IEnumerable{User}.</returns>
public IEnumerable<User> RetrieveAllUsers()
{
using (var cmd = connection.CreateCommand())
{
cmd.CommandText = "select data from users";
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
{
while (reader.Read())
{
using (var stream = GetStream(reader, 0))
{
var user = _jsonSerializer.DeserializeFromStream<User>(stream);
yield return user;
}
}
}
}
}
/// <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 Task DeleteUser(User user, CancellationToken cancellationToken)
{
if (user == null)
{
throw new ArgumentNullException("user");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
cancellationToken.ThrowIfCancellationRequested();
using (var cmd = connection.CreateCommand())
{
cmd.CommandText = "delete from users where guid=@guid";
var guidParam = cmd.Parameters.Add("@guid", DbType.Guid);
guidParam.Value = user.Id;
return ExecuteCommand(cmd);
}
}
}
}
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