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using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using System;
using System.Data;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Sqlite
{
/// <summary>
/// Class SQLiteDisplayPreferencesRepository
/// </summary>
public 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>
/// 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>
/// The _protobuf serializer
/// </summary>
private readonly IJsonSerializer _jsonSerializer;
/// <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="jsonSerializer">The json serializer.</param>
/// <param name="logManager">The log manager.</param>
/// <exception cref="System.ArgumentNullException">protobufSerializer</exception>
public SQLiteDisplayPreferencesRepository(IApplicationPaths appPaths, IJsonSerializer jsonSerializer, ILogManager logManager)
: base(logManager)
{
if (jsonSerializer == null)
{
throw new ArgumentNullException("jsonSerializer");
}
if (appPaths == null)
{
throw new ArgumentNullException("appPaths");
}
_jsonSerializer = jsonSerializer;
_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 displaypreferences (id GUID, data BLOB)",
"create unique index if not exists displaypreferencesindex on displaypreferences (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="displayPreferences">The display preferences.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">item</exception>
public async Task SaveDisplayPreferences(DisplayPreferences displayPreferences, CancellationToken cancellationToken)
{
if (displayPreferences == null)
{
throw new ArgumentNullException("displayPreferences");
}
if (displayPreferences.Id == Guid.Empty)
{
throw new ArgumentNullException("displayPreferences.Id");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
cancellationToken.ThrowIfCancellationRequested();
var serialized = _jsonSerializer.SerializeToBytes(displayPreferences);
cancellationToken.ThrowIfCancellationRequested();
var cmd = connection.CreateCommand();
cmd.CommandText = "replace into displaypreferences (id, data) values (@1, @2)";
cmd.AddParam("@1", displayPreferences.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>
/// Gets the display preferences.
/// </summary>
/// <param name="displayPreferencesId">The display preferences id.</param>
/// <returns>Task{DisplayPreferences}.</returns>
/// <exception cref="System.ArgumentNullException">item</exception>
public async Task<DisplayPreferences> GetDisplayPreferences(Guid displayPreferencesId)
{
if (displayPreferencesId == Guid.Empty)
{
throw new ArgumentNullException("displayPreferencesId");
}
var cmd = connection.CreateCommand();
cmd.CommandText = "select data from displaypreferences where id = @id";
var idParam = cmd.Parameters.Add("@id", DbType.Guid);
idParam.Value = displayPreferencesId;
using (var reader = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow).ConfigureAwait(false))
{
if (reader.Read())
{
using (var stream = GetStream(reader, 0))
{
return _jsonSerializer.DeserializeFromStream<DisplayPreferences>(stream);
}
}
}
return null;
}
}
}
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