using System ;
using System.Collections.Generic ;
using System.IO ;
using System.Threading ;
using System.Threading.Tasks ;
using MediaBrowser.Controller ;
using MediaBrowser.Controller.Entities ;
using MediaBrowser.Controller.Persistence ;
using MediaBrowser.Model.IO ;
using MediaBrowser.Model.Logging ;
using MediaBrowser.Model.Serialization ;
using SQLitePCL.pretty ;
namespace Emby.Server.Implementations.Data
{
/// <summary>
/// Class SQLiteUserRepository
/// </summary>
public class SqliteUserRepository : BaseSqliteRepository , IUserRepository
{
private readonly IJsonSerializer _jsonSerializer ;
private readonly IMemoryStreamFactory _memoryStreamProvider ;
public SqliteUserRepository ( ILogger logger , IServerApplicationPaths appPaths , IJsonSerializer jsonSerializer , IMemoryStreamFactory memoryStreamProvider )
: base ( logger )
{
_jsonSerializer = jsonSerializer ;
_memoryStreamProvider = memoryStreamProvider ;
DbFilePath = Path . Combine ( appPaths . DataPath , "users.db" ) ;
}
/// <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 void Initialize ( )
{
using ( var connection = CreateConnection ( ) )
{
RunDefaultInitialization ( connection ) ;
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)" ,
"pragma shrink_memory"
} ;
connection . 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" ) ;
}
cancellationToken . ThrowIfCancellationRequested ( ) ;
var serialized = _jsonSerializer . SerializeToBytes ( user , _memoryStreamProvider ) ;
cancellationToken . ThrowIfCancellationRequested ( ) ;
using ( WriteLock . Write ( ) )
{
using ( var connection = CreateConnection ( ) )
{
connection . RunInTransaction ( db = >
{
using ( var statement = db . PrepareStatement ( "replace into users (guid, data) values (@guid, @data)" ) )
{
statement . TryBind ( "@guid" , user . Id . ToGuidParamValue ( ) ) ;
statement . TryBind ( "@data" , serialized ) ;
statement . MoveNext ( ) ;
}
} , TransactionMode ) ;
}
}
}
/// <summary>
/// Retrieve all users from the database
/// </summary>
/// <returns>IEnumerable{User}.</returns>
public IEnumerable < User > RetrieveAllUsers ( )
{
var list = new List < User > ( ) ;
using ( WriteLock . Read ( ) )
{
using ( var connection = CreateConnection ( true ) )
{
foreach ( var row in connection . Query ( "select guid,data from users" ) )
{
var id = row [ 0 ] . ReadGuid ( ) ;
using ( var stream = _memoryStreamProvider . CreateNew ( row [ 1 ] . ToBlob ( ) ) )
{
stream . Position = 0 ;
var user = _jsonSerializer . DeserializeFromStream < User > ( stream ) ;
user . Id = id ;
list . Add ( user ) ;
}
}
}
}
return list ;
}
/// <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 ( ) ;
using ( WriteLock . Write ( ) )
{
using ( var connection = CreateConnection ( ) )
{
connection . RunInTransaction ( db = >
{
using ( var statement = db . PrepareStatement ( "delete from users where guid=@id" ) )
{
statement . TryBind ( "@id" , user . Id . ToGuidParamValue ( ) ) ;
statement . MoveNext ( ) ;
}
} , TransactionMode ) ;
}
}
}
}
}