using MediaBrowser.Controller ;
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.Persistence
{
/// <summary>
/// Class SQLiteUserRepository
/// </summary>
public class SqliteUserRepository : BaseSqliteRepository , IUserRepository
{
private IDbConnection _connection ;
private readonly IServerApplicationPaths _appPaths ;
private readonly IJsonSerializer _jsonSerializer ;
public SqliteUserRepository ( ILogManager logManager , IServerApplicationPaths appPaths , IJsonSerializer jsonSerializer ) : base ( logManager )
{
_appPaths = appPaths ;
_jsonSerializer = jsonSerializer ;
}
/// <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 async Task Initialize ( IDbConnector dbConnector )
{
var dbFile = Path . Combine ( _appPaths . DataPath , "users.db" ) ;
_connection = await dbConnector . Connect ( 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" ,
"pragma shrink_memory"
} ;
_connection . RunQueries ( queries , Logger ) ;
}
/// <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 ) ;
cancellationToken . ThrowIfCancellationRequested ( ) ;
await WriteLock . WaitAsync ( cancellationToken ) . ConfigureAwait ( false ) ;
IDbTransaction transaction = null ;
try
{
transaction = _connection . BeginTransaction ( ) ;
using ( var cmd = _connection . CreateCommand ( ) )
{
cmd . CommandText = "replace into users (guid, data) values (@1, @2)" ;
cmd . Parameters . Add ( cmd , "@1" , DbType . Guid ) . Value = user . Id ;
cmd . Parameters . Add ( cmd , "@2" , DbType . Binary ) . Value = serialized ;
cmd . Transaction = transaction ;
cmd . ExecuteNonQuery ( ) ;
}
transaction . Commit ( ) ;
}
catch ( OperationCanceledException )
{
if ( transaction ! = null )
{
transaction . Rollback ( ) ;
}
throw ;
}
catch ( Exception e )
{
Logger . ErrorException ( "Failed to save user:" , e ) ;
if ( transaction ! = null )
{
transaction . Rollback ( ) ;
}
throw ;
}
finally
{
if ( transaction ! = null )
{
transaction . Dispose ( ) ;
}
WriteLock . Release ( ) ;
}
}
/// <summary>
/// Retrieve all users from the database
/// </summary>
/// <returns>IEnumerable{User}.</returns>
public IEnumerable < User > RetrieveAllUsers ( )
{
using ( var cmd = _connection . CreateCommand ( ) )
{
cmd . CommandText = "select guid,data from users" ;
using ( var reader = cmd . ExecuteReader ( CommandBehavior . SequentialAccess | CommandBehavior . SingleResult ) )
{
while ( reader . Read ( ) )
{
var id = reader . GetGuid ( 0 ) ;
using ( var stream = reader . GetMemoryStream ( 1 ) )
{
var user = _jsonSerializer . DeserializeFromStream < User > ( stream ) ;
user . Id = id ;
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 async Task DeleteUser ( User user , CancellationToken cancellationToken )
{
if ( user = = null )
{
throw new ArgumentNullException ( "user" ) ;
}
cancellationToken . ThrowIfCancellationRequested ( ) ;
await WriteLock . WaitAsync ( cancellationToken ) . ConfigureAwait ( false ) ;
IDbTransaction transaction = null ;
try
{
transaction = _connection . BeginTransaction ( ) ;
using ( var cmd = _connection . CreateCommand ( ) )
{
cmd . CommandText = "delete from users where guid=@guid" ;
cmd . Parameters . Add ( cmd , "@guid" , DbType . Guid ) . Value = user . Id ;
cmd . Transaction = transaction ;
cmd . ExecuteNonQuery ( ) ;
}
transaction . Commit ( ) ;
}
catch ( OperationCanceledException )
{
if ( transaction ! = null )
{
transaction . Rollback ( ) ;
}
throw ;
}
catch ( Exception e )
{
Logger . ErrorException ( "Failed to delete user:" , e ) ;
if ( transaction ! = null )
{
transaction . Rollback ( ) ;
}
throw ;
}
finally
{
if ( transaction ! = null )
{
transaction . Dispose ( ) ;
}
WriteLock . Release ( ) ;
}
}
protected override void CloseConnection ( )
{
if ( _connection ! = null )
{
if ( _connection . IsOpen ( ) )
{
_connection . Close ( ) ;
}
_connection . Dispose ( ) ;
_connection = null ;
}
}
}
}