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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;
using MediaBrowser.Common.IO;
using MediaBrowser.Model.IO;
namespace MediaBrowser.Server.Implementations.Persistence
{
/// <summary>
/// Class SQLiteUserRepository
/// </summary>
public class SqliteUserRepository : BaseSqliteRepository, IUserRepository
{
private readonly IJsonSerializer _jsonSerializer;
private readonly IMemoryStreamFactory _memoryStreamProvider;
public SqliteUserRepository(ILogManager logManager, IServerApplicationPaths appPaths, IJsonSerializer jsonSerializer, IDbConnector dbConnector, IMemoryStreamFactory memoryStreamProvider) : base(logManager, dbConnector)
{
_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 async Task Initialize()
{
using (var connection = await CreateConnection().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)",
"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, _memoryStreamProvider);
cancellationToken.ThrowIfCancellationRequested();
using (var connection = await CreateConnection().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();
}
}
}
}
/// <summary>
/// Retrieve all users from the database
/// </summary>
/// <returns>IEnumerable{User}.</returns>
public IEnumerable<User> RetrieveAllUsers()
{
var list = new List<User>();
using (var connection = CreateConnection(true).Result)
{
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, _memoryStreamProvider))
{
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 (var connection = await CreateConnection().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();
}
}
}
}
}
}
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