<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014  Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
 * Website: http://www.espocrm.com
 *
 * EspoCRM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * EspoCRM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
 ************************************************************************/ 

namespace Espo\Core\Utils;

use \Espo\Core\Exceptions\Error;

class Auth 
{
	protected $container;
	
	public function __construct(\Espo\Core\Container $container)
	{
		$this->container = $container;
	}
	
	public function useNoAuth($isAdmin = false)
	{
		$entityManager = $this->container->get('entityManager');	
		
		$user = $entityManager->getRepository('User')->get('system');
		$user->set('isAdmin', $isAdmin);		
		if (!$user) {
			throw new Error('System user is not found');			
		}

		$entityManager->setUser($user);
		$this->container->setUser($user);
	}
	
	public function login($username, $password)
	{
		$GLOBALS['log']->debug('AUTH: Try to authenticate');
		
		$hash = md5($password);
		
		$entityManager = $this->container->get('entityManager');
		
		$authToken = $entityManager->getRepository('AuthToken')->where(array('token' => $password))->findOne();
		if ($authToken) {
			$hash = $authToken->get('hash');
		}
		
		$user = $entityManager->getRepository('User')->findOne(array(
			'whereClause' => array(
				'userName' => $username,
				'password' => $hash
			),
		));
		
		if ($user) {
			$entityManager->setUser($user);
			$this->container->setUser($user);
			$GLOBALS['log']->debug('AUTH: Result of authenticate is [true]');
			
			if (!$authToken) {
				$authToken = $entityManager->getEntity('AuthToken');
				$token = $this->createToken($user);
				$authToken->set('token', $token);
				$authToken->set('hash', $user->get('password'));
				$authToken->set('ipAddress', $_SERVER['REMOTE_ADDR']);
				$authToken->set('userId', $user->id);	
			}
			
			$authToken->set('lastAccess', date('Y-m-d H:i:s'));
			
			$entityManager->saveEntity($authToken);
			$user->set('token', $authToken->get('token'));
			
			return true;
		}
	}
	
	protected function createToken($user)
	{
		return md5(uniqid($user->get('password')));
	}
	
	public function destroyAuthToken($token)
	{	
		$entityManager = $this->container->get('entityManager');
		
		$authToken = $entityManager->getRepository('AuthToken')->where(array('token' => $token))->findOne();
		if ($authToken) {
			$entityManager->removeEntity($authToken);
			return true;			
		}
	}
}