<?php


/* Настройки сайта
-----------------------------------------------------------------------------*/
define( 'TEST_MODE', true );
define( 'SITE_ADDRESS', 'soc.tt' );
define( 'SITE_NAME', 'Social network' );
define( 'SITE_EMAIL', 'mail@soc.tt' );
define( 'EXPIRE_COOKIE', 3600*24*32 );


/* Установки
-----------------------------------------------------------------------------*/
session_start();
ini_set( "display_errors", TEST_MODE );
date_default_timezone_set( "Asia/Yekaterinburg" );


/* Автозагрузка классов
-----------------------------------------------------------------------------*/
function __autoload($name) {
    include_once('classes/' . $name . '.php');
}


/* База Данных
-----------------------------------------------------------------------------*/
class DataBase {
    const host = 'localhost';
    const dbName = 'soc';
    const user = 'root';
    const password = '';
    public $db;
    private $attr = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8');
    private static $instance;
    private function __construct(){
	$this->db = new PDO('mysql:host='.self::host.';dbname='.self::dbName,  self::user,  self::password,  $this->attr);
    }
    private function __clone(){}
    private function __wakeup(){}
    private function __destruct(){
	$this->db = null;
    }
    public static function getInstance() {
	if ( is_null(self::$instance) ) {
	    self::$instance = new self();
	}
	return self::$instance;
    }
}


/* Сессия и куки
-----------------------------------------------------------------------------*/
class Session {
    public $data;
    public $auth = false;
    public function __construct(){
	if(!empty($_SESSION['key0']) || !empty($_SESSION['key1']) || !empty($_SESSION['save']))
	    if(!empty($_SESSION['key0']) && !empty($_SESSION['key1']) && !empty($_SESSION['save'])){
		$this->data=DataBase::getInstance()->db->query('SELECT * FROM `users` WHERE `id`=\''.$_SESSION['key0'].'\' AND `key`=\''.$_SESSION['key1'].'\'');
		$this->data=$this->data->fetch();
		if(!empty($this->data[0])){
		    $_SESSION['save']==1?$this->createCookie():$this->deleteCookie();
		    $this->auth = true;
		}
		else {
		    $this->deleteSession();
		    $this->deleteCookie();
		}
	    }
	    else {
		$this->deleteSession();
		$this->deleteCookie();
	    }
	else
	    if(!empty($_COOKIE['key0']) || !empty($_COOKIE['key1']))
		if(!empty($_COOKIE['key0']) && !empty($_COOKIE['key1'])){
		    $this->data=DataBase::getInstance()->db->query('SELECT * FROM `users` WHERE `id`=\''.$_COOKIE['key0'].'\' AND `key`=\''.$_COOKIE['key1'].'\'');
		    $this->data=$this->data->fetch();
		    if(!empty($this->data[0])){
			$this->createSession(1);
			$this->createCookie();
			$this->auth = true;
		    }
		    else
			$this->delete();
		}
		else
		    $this->delete();
	    else
		$this->delete();
    }
    public function login($login, $password, $save){
	$this->data=DataBase::getInstance()->db->query('SELECT * FROM users WHERE (nick=\''.$login.'\' OR email=\''.$login.'\') AND password=\''.$password.'\'');
	$this->data=$this->data->fetch();
	if(!empty($this->data[0])){
	    if($save){
		$this->createCookie();
		$this->createSession(1);
	    }
	    else
		$this->delete();
	    $this->auth = true;
	}
	else
	    $this->delete();
    }
    private function createSession($save=0) {
	$_SESSION['key0'] = $this->data['id'];
	$_SESSION['key1'] = $this->data['key'];
	$_SESSION['save'] = $save;
    }
    private function deleteSession() {
	$_SESSION['key0'] = '';
	$_SESSION['key1'] = '';
	$_SESSION['save'] = '';
    }
    private function createCookie() {
	$key0=$this->data['id'];
	$key1=$this->data['key'];
	$_COOKIE['key0']=$key0;
	$_COOKIE['key1']=$key1;
	setcookie("key0",$key0,time()+EXPIRE_COOKIE,'/');
	setcookie("key1",$key1,time()+EXPIRE_COOKIE,'/');
    }
    private function deleteCookie() {
	$key0='';
	$key1='';
	$_COOKIE['key0']=$key0;
	$_COOKIE['key1']=$key1;
	setcookie("key0",$key0,time()+EXPIRE_COOKIE,'/');
	setcookie("key1",$key1,time()+EXPIRE_COOKIE,'/');
    }
    public function delete() {
	$this->deleteSession();
	$this->deleteCookie();
    }
}
$u = new Session();
?>