<?php
if (!defined('_PS_VERSION_'))
exit;
class AuthenticationFacebook extends Module
{
	public function __construct()
	{
		$this->name = 'AuthenticationFacebook';
		$this->tab = 'other';
		$this->version = '1.0.0';
		$this->author = 'Roman Stadnyk';
		$this->need_instance = 0;
		$this->ps_versions_compliancy = array('min' => '1.6', 'max' => _PS_VERSION_);
		$this->bootstrap = true;
		parent::__construct();
		$this->displayName = $this->l('AuthenticationFacebook');
		$this->description = $this->l('Fast sign in with Facebook.');
	}
	
	public function install()
	{
		return (parent::install() && $this->registerHook('rightColumn'));
	}
	
	public function hookRightColumn($params)
	{
		$this->context->smarty->assign('textTest', "true" );
		//AuthenticationFacebook::authentication();
		return $this->display(__FILE__, 'authenticationFacebook.tpl');
	}
	
	public static function authentication()
	{	
		$site_url = $_SERVER['HTTP_HOST'];
		$client_id = '********'; // Client ID
		$client_secret = '******'; // Client secret
		$redirect_uri = 'http://'.$site_url.'/....../'; // Redirect URIs

		$url = 'https://www.facebook.com/dialog/oauth';

		$params = array(
			'client_id'     => $client_id,
			'redirect_uri'  => $redirect_uri,
			'response_type' => 'code',
			'scope'         => 'email'
		);
		
		echo $link = '<a href="' . $url . '?' . urldecode(http_build_query($params)) . '"><img src="http://'.$site_url.'/...../modules/authenticationFacebook/img/facebook.png" style="width: 50px;"></a>';

		if (isset($_GET['code'])) {
			$result = false;

			$params = array(
				'client_id'     => $client_id,
				'redirect_uri'  => $redirect_uri,
				'client_secret' => $client_secret,
				'code'          => $_GET['code']
			);

			$url = 'https://graph.facebook.com/v2.9/oauth/access_token';

			$tokenInfo = null;
			$tokenInfo = file_get_contents($url . '?' . http_build_query($params));

			$var = json_decode($tokenInfo, true);

			if (count($tokenInfo) > 0 && isset($var['access_token'])) {
				
				$params = array('access_token' => $var['access_token'], "fields"=>"email,first_name,last_name,locale,gender,birthday,location");

				$userInfo = json_decode(file_get_contents('https://graph.facebook.com/me' . '?' . urldecode(http_build_query($params))), true);

				if (isset($userInfo['id'])) {					
					$sql = "SELECT * FROM `" . _DB_PREFIX_ . "user_facebook` WHERE `id_facebook` = '" . $userInfo['id'] . "'";
					$row_customer = Db::getInstance ()->GetRow ($sql);

					// The user account has been found!
					if (!empty ($row_customer ['id_customer']))
					{
						//var_dump($userInfo);
						$email = Db::getInstance ()->getValue('SELECT `email` FROM `' . _DB_PREFIX_ . 'customer` WHERE `id_customer` = "'.$row_customer ['id_customer'].'"');
						//перевіряємо чи не змінив свою електронну скриньку на фейсбуці наш відвідувач, якщо змінив то ми міняємо її і в себе
						if($email == $userInfo['email'])
						{
							AuthenticationFacebook::login_customer($row_customer ['id_customer']);
						} else {
							Db::getInstance()->Execute("UPDATE `"._DB_PREFIX_."customer` SET `email`='".$userInfo['email']."'");
							AuthenticationFacebook::login_customer($row_customer ['id_customer']);
						}
					} else {
						$pass = md5(rand(10000, 100000));
						$zero = 0;
						$one = 1;
						$two = 2;
						$three = 3;
						
						if($userInfo['locale'] == 'ru_RU') $lang = 1;
						if($userInfo['locale'] == 'uk_UA') $lang = 2;
						if($userInfo['locale'] != 'uk_UA' and $userInfo['locale'] != 'ru_RU') $lang = 3;
						
						if($userInfo['gender'] == 'male') $gender = 0;
						if($userInfo['gender'] == 'female') $gender = 1;
						if($userInfo['gender'] != 'male' and $userInfo['gender'] != 'female') $gender = 0;
						
						$dateDefault = date("Y-m-d H:i:s"); 
						$birthday = date("Y-m-d", strtotime($userInfo['birthday']));						
						$ip_registration = $_SERVER["REMOTE_ADDR"];
						$secure_key = md5(rand(10000, 100000));
						
						Db::getInstance()->autoExecute(_DB_PREFIX_.'customer', array(
							'id_shop_group' =>    (int)$zero,
							'id_shop' =>    (int)$one,
							'id_gender' =>    (int)$gender,
							'id_default_group' =>    (int)$three,
							'id_lang' =>    (int)$lang,
							'id_risk' =>    (int)$zero,
							'firstname' =>    pSQL($userInfo['first_name']),
							'lastname' =>    pSQL($userInfo['last_name']),
							'email' =>    pSQL($userInfo['email']),
							'passwd' =>    pSQL($pass),
							'last_passwd_gen' =>    pSQL($dateDefault),
							'birthday' =>    pSQL($birthday),
							'newsletter' =>    (int)($one),
							'ip_registration_newsletter' =>    pSQL($ip_registration),
							'newsletter_date_add' =>    pSQL($dateDefault),
							'optin' =>    (int)($one),
							'outstanding_allow_amount' =>    (int)($zero),
							'show_public_prices' =>    (int)($zero),
							'max_payment_days' =>    (int)($zero),
							'secure_key' =>    pSQL($secure_key),
							'active' =>    (int)$one,
							'is_guest' =>    (int)$zero,
							'deleted' =>    (int)$zero,
							'date_add' =>    pSQL($dateDefault),
							'date_upd' =>    pSQL($dateDefault),
							'id_organization' =>    (int)($zero),
							'sms_requests' =>    (int)($zero),
							'email_requests' =>    (int)($zero)
						), 'INSERT');
						//echo Db::getInstance()->Insert_ID();// - id останього запису в базу
						// Add new user in  table user_facebook.
						Db::getInstance()->autoExecute(_DB_PREFIX_.'user_facebook', array(
							'id_customer' =>    (int)Db::getInstance()->Insert_ID(),
							'id_facebook' =>    $userInfo['id']
							), 'INSERT');
							
						$id = Db::getInstance ()->getValue('SELECT `id_customer` FROM `' . _DB_PREFIX_ . 'user_facebook` WHERE `id_facebook` = "'.$userInfo['id'].'"');
						
						AuthenticationFacebook::login_customer($id);
					}
					
				}
			}

		}
	}
	
	
	public static function login_customer($id_customer)
	{
			$id = Db::getInstance ()->getValue('SELECT `id_customer` FROM `' . _DB_PREFIX_ . 'customer` WHERE `id_customer` = "'.(int)$id_customer.'"');
			
			$customer = new Customer($id);
			//var_dump($customer);
			if (Validate::isLoadedObject($customer))
			{
				$context = Context::getContext();
				$context->cookie->id_customer = (int)$customer->id;
				$context->cookie->customer_firstname = $customer->firstname;
				$context->cookie->customer_lastname = $customer->lastname;
				$context->cookie->is_guest = $customer->isGuest();
				$context->cookie->passwd = $customer->passwd;
				$context->cookie->email = $customer->email;
				$context->cookie->logged = true;
				$context->cookie->write();
			}
			header("Location: http://......."); /* Redirect browser */

	}
}
?>