You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
jellyfin/MediaBrowser.Server.Impleme.../Persistence/SqliteChapterRepository.cs

324 lines
11 KiB

using MediaBrowser.Common.Configuration;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SQLite;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Persistence
{
public class SqliteChapterRepository
{
private SQLiteConnection _connection;
private readonly ILogger _logger;
/// <summary>
/// The _app paths
/// </summary>
private readonly IApplicationPaths _appPaths;
private SQLiteCommand _deleteChaptersCommand;
private SQLiteCommand _saveChapterCommand;
/// <summary>
/// Initializes a new instance of the <see cref="SqliteItemRepository" /> class.
/// </summary>
/// <param name="appPaths">The app paths.</param>
/// <param name="logManager">The log manager.</param>
/// <exception cref="System.ArgumentNullException">appPaths
/// or
/// jsonSerializer</exception>
public SqliteChapterRepository(IApplicationPaths appPaths, ILogManager logManager)
{
if (appPaths == null)
{
throw new ArgumentNullException("appPaths");
}
_appPaths = appPaths;
_logger = logManager.GetLogger(GetType().Name);
}
/// <summary>
/// Opens the connection to the database
/// </summary>
/// <returns>Task.</returns>
public async Task Initialize()
{
var dbFile = Path.Combine(_appPaths.DataPath, "chapters.db");
_connection = await SqliteExtensions.ConnectToDb(dbFile).ConfigureAwait(false);
string[] queries = {
"create table if not exists chapters (ItemId GUID, ChapterIndex INT, StartPositionTicks BIGINT, Name TEXT, ImagePath TEXT, PRIMARY KEY (ItemId, ChapterIndex))",
"create index if not exists idx_chapters on chapters(ItemId, ChapterIndex)",
//pragmas
"pragma temp_store = memory"
};
_connection.RunQueries(queries, _logger);
PrepareStatements();
}
/// <summary>
/// The _write lock
/// </summary>
private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
/// <summary>
/// Prepares the statements.
/// </summary>
private void PrepareStatements()
{
_deleteChaptersCommand = new SQLiteCommand
{
CommandText = "delete from chapters where ItemId=@ItemId"
};
_deleteChaptersCommand.Parameters.Add(new SQLiteParameter("@ItemId"));
_saveChapterCommand = new SQLiteCommand
{
CommandText = "replace into chapters (ItemId, ChapterIndex, StartPositionTicks, Name, ImagePath) values (@ItemId, @ChapterIndex, @StartPositionTicks, @Name, @ImagePath)"
};
_saveChapterCommand.Parameters.Add(new SQLiteParameter("@ItemId"));
_saveChapterCommand.Parameters.Add(new SQLiteParameter("@ChapterIndex"));
_saveChapterCommand.Parameters.Add(new SQLiteParameter("@StartPositionTicks"));
_saveChapterCommand.Parameters.Add(new SQLiteParameter("@Name"));
_saveChapterCommand.Parameters.Add(new SQLiteParameter("@ImagePath"));
}
/// <summary>
/// Gets chapters for an item
/// </summary>
/// <param name="id">The id.</param>
/// <returns>IEnumerable{ChapterInfo}.</returns>
/// <exception cref="System.ArgumentNullException">id</exception>
public IEnumerable<ChapterInfo> GetChapters(Guid id)
{
if (id == Guid.Empty)
{
throw new ArgumentNullException("id");
}
using (var cmd = _connection.CreateCommand())
{
cmd.CommandText = "select StartPositionTicks,Name,ImagePath from Chapters where ItemId = @ItemId order by ChapterIndex asc";
cmd.Parameters.Add("@ItemId", DbType.Guid).Value = id;
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
{
while (reader.Read())
{
var chapter = new ChapterInfo
{
StartPositionTicks = reader.GetInt64(0)
};
if (!reader.IsDBNull(1))
{
chapter.Name = reader.GetString(1);
}
if (!reader.IsDBNull(2))
{
chapter.ImagePath = reader.GetString(2);
}
yield return chapter;
}
}
}
}
/// <summary>
/// Gets a single chapter for an item
/// </summary>
/// <param name="id">The id.</param>
/// <param name="index">The index.</param>
/// <returns>ChapterInfo.</returns>
/// <exception cref="System.ArgumentNullException">id</exception>
public ChapterInfo GetChapter(Guid id, int index)
{
if (id == Guid.Empty)
{
throw new ArgumentNullException("id");
}
using (var cmd = _connection.CreateCommand())
{
cmd.CommandText = "select StartPositionTicks,Name,ImagePath from Chapters where ItemId = @ItemId and ChapterIndex=@ChapterIndex";
cmd.Parameters.Add("@ItemId", DbType.Guid).Value = id;
cmd.Parameters.Add("@ChapterIndex", DbType.Int32).Value = index;
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow))
{
if (reader.Read())
{
return new ChapterInfo
{
StartPositionTicks = reader.GetInt64(0),
Name = reader.GetString(1),
ImagePath = reader.GetString(2)
};
}
}
return null;
}
}
/// <summary>
/// Saves the chapters.
/// </summary>
/// <param name="id">The id.</param>
/// <param name="chapters">The chapters.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">
/// id
/// or
/// chapters
/// or
/// cancellationToken
/// </exception>
public async Task SaveChapters(Guid id, IEnumerable<ChapterInfo> chapters, CancellationToken cancellationToken)
{
if (id == Guid.Empty)
{
throw new ArgumentNullException("id");
}
if (chapters == null)
{
throw new ArgumentNullException("chapters");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
cancellationToken.ThrowIfCancellationRequested();
await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
SQLiteTransaction transaction = null;
try
{
transaction = _connection.BeginTransaction();
// First delete chapters
_deleteChaptersCommand.Parameters[0].Value = id;
_deleteChaptersCommand.Transaction = transaction;
await _deleteChaptersCommand.ExecuteNonQueryAsync(cancellationToken);
var index = 0;
foreach (var chapter in chapters)
{
cancellationToken.ThrowIfCancellationRequested();
_saveChapterCommand.Parameters[0].Value = id;
_saveChapterCommand.Parameters[1].Value = index;
_saveChapterCommand.Parameters[2].Value = chapter.StartPositionTicks;
_saveChapterCommand.Parameters[3].Value = chapter.Name;
_saveChapterCommand.Parameters[4].Value = chapter.ImagePath;
_saveChapterCommand.Transaction = transaction;
await _saveChapterCommand.ExecuteNonQueryAsync(cancellationToken);
index++;
}
transaction.Commit();
}
catch (OperationCanceledException)
{
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
catch (Exception e)
{
_logger.ErrorException("Failed to save chapters:", e);
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
finally
{
if (transaction != null)
{
transaction.Dispose();
}
_writeLock.Release();
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private readonly object _disposeLock = new object();
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool dispose)
{
if (dispose)
{
try
{
lock (_disposeLock)
{
if (_connection != null)
{
if (_connection.IsOpen())
{
_connection.Close();
}
_connection.Dispose();
_connection = null;
}
}
}
catch (Exception ex)
{
_logger.ErrorException("Error disposing database", ex);
}
}
}
}
}