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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 SQLiteUserDataRepository
/// </summary>
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>
/// 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 IProtobufSerializer _protobufSerializer;
/// <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="protobufSerializer">The protobuf serializer.</param>
/// <param name="logManager">The log manager.</param>
/// <exception cref="System.ArgumentNullException">protobufSerializer</exception>
public SQLiteUserDataRepository(IApplicationPaths appPaths, IProtobufSerializer protobufSerializer, ILogManager logManager)
: base(logManager)
{
if (protobufSerializer == null)
{
throw new ArgumentNullException("protobufSerializer");
}
if (appPaths == null)
{
throw new ArgumentNullException("appPaths");
}
_protobufSerializer = protobufSerializer;
_appPaths = appPaths;
}
/// <summary>
/// Opens the connection to the database
/// </summary>
/// <returns>Task.</returns>
public async Task Initialize()
{
var dbFile = Path.Combine(_appPaths.DataPath, "userdata.db");
await ConnectToDB(dbFile).ConfigureAwait(false);
string[] queries = {
"create table if not exists userdata (id GUID, userId GUID, data BLOB)",
"create unique index if not exists userdataindex on userdata (id, userId)",
"create table if not exists schema_version (table_name primary key, version)",
//pragmas
"pragma temp_store = memory"
};
RunQueries(queries);
}
/// <summary>
/// Saves the user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="userDataId">The user data id.</param>
/// <param name="userData">The user data.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">
/// userData
/// or
/// cancellationToken
/// or
/// userId
/// or
/// userDataId
/// </exception>
public async Task SaveUserData(Guid userId, Guid userDataId, UserItemData userData, CancellationToken cancellationToken)
{
if (userData == null)
{
throw new ArgumentNullException("userData");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
if (userId == Guid.Empty)
{
throw new ArgumentNullException("userId");
}
if (userDataId == Guid.Empty)
{
throw new ArgumentNullException("userDataId");
}
cancellationToken.ThrowIfCancellationRequested();
var serialized = _protobufSerializer.SerializeToBytes(userData);
cancellationToken.ThrowIfCancellationRequested();
var cmd = connection.CreateCommand();
cmd.CommandText = "replace into userdata (id, userId, data) values (@1, @2, @3)";
cmd.AddParam("@1", userDataId);
cmd.AddParam("@2", userId);
cmd.AddParam("@3", 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 user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="userDataId">The user data id.</param>
/// <returns>Task{UserItemData}.</returns>
/// <exception cref="System.ArgumentNullException">
/// userId
/// or
/// userDataId
/// </exception>
public async Task<UserItemData> GetUserData(Guid userId, Guid userDataId)
{
if (userId == Guid.Empty)
{
throw new ArgumentNullException("userId");
}
if (userDataId == Guid.Empty)
{
throw new ArgumentNullException("userDataId");
}
var cmd = connection.CreateCommand();
cmd.CommandText = "select data from userdata where id = @id and userId=@userId";
var idParam = cmd.Parameters.Add("@id", DbType.Guid);
idParam.Value = userDataId;
var userIdParam = cmd.Parameters.Add("@userId", DbType.Guid);
userIdParam.Value = userId;
using (var reader = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow).ConfigureAwait(false))
{
if (reader.Read())
{
using (var stream = GetStream(reader, 0))
{
return _protobufSerializer.DeserializeFromStream<UserItemData>(stream);
}
}
}
return null;
}
}
}
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