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Latest 100 public snipts » hongster's snipts » kohana The latest kohana snipts from hongster.

showing 1-1 of 1 snipts for kohana
  • ∞ User authentication class. 
    <?php defined('SYSPATH') or die('No direct script access.');

class Auth_Core {
	const REMEMBER_PERIOD = 1209600; // 2 weeks
	
	/*
		If session is set, check last_login. If last_login is > 5 min ago,
		update the database+cookie.
		If no session, and has remember_code(from cookie), verify
		remember_code. If remember_code is valid, login the user. If 
		remember_code is invalid, preform logout.
	*/
	public static function auto_login() {
		$session = Session::instance();
	
		$id = $session->get('id');
		$remember_code = cookie::get('remember_code', FALSE);
		if ($id) { // Has logged in
			// Update DB every 5 or more minutes
			if ((time() - $session->get('last_login', 0)) > 300) {
				$user = ORM::factory('user', $id);
				if ($user->loaded) {
					self::force_login($user, $remember_code != FALSE);
				}
			}
			
			return; // Impt
		}
		
		// Session expired, but cookie remind us to continue login status
		if ($remember_code) {
			$user = ORM::factory('user')
				->where('remember_code', $remember_code)
				->find();
			if ($user->loaded) { // Valid code
				// Is remember period expired?
				if ((time() - strtotime($user->last_login)) 
						< self::REMEMBER_PERIOD) {
					self::force_login($user, TRUE);
					return; // Impt
				}
			}
			
			// Invalid code or REMEMBER_PERIOD has passed
			self::logout();
		}
	}
	
	/*
		Determine if user is logged in.
		@return boolean
	*/
	public static function is_login() {
		$is_login = Session::instance()->get('id', FALSE);
		return ($is_login != FALSE);
	}
	
	/*
		Force login without authentication.
		@param User_Model $user
		@param boolean $remember Keep login status for 2 week. Default FALSE.
	*/
	private static function force_login($user, $remember=FALSE) {
		$last_login = time();
		
		$session = Session::instance();
		$session->set('id', $user->id);
		$session->set('last_login',time());
		
		$user->last_login = date('Y-m-d H:i:s', $last_login);
		
		if ($remember) {
			// Gen remember_code
			$user->remember_code = self::_rand_code();
			// Set cookie
			cookie::set(
				'remember_code', 
				$user->remember_code, 
				self::REMEMBER_PERIOD);
		}
		else {
			$user->remember_code = '';
			cookie::delete('remember_code');
		}
		
		$user->save();
	}
	
	/*
		Login and create session.
		@param string $username
		@param string $password
		@param boolean $remember Keep login status for 2 week. Default FALSE.
		@return boolean True, if login successful. False, otherwise.
	*/
	public static function login($username, $password, $remember=FALSE) {
		$user = ORM::factory('user')
			->where(array('username'=>$username, 'password'=>md5($password)))
			->find();
			
		if ($user->loaded) {
			self::force_login($user, $remember);
			return TRUE;
		}
		
		return FALSE;
	}
	
	/*
		Logout and destroy session.
	*/
	public static function logout() {
		$session = Session::instance();
						
		$id = $session->get('id');
		if ($id) {
			$user = ORM::factory('user', $id);
			var_dump($user);
			if ($user->loaded) {
				$user->last_login = date('Y-m-d H:i:s', time());
				$user->remember_code = '';
				$user->save();
			}
		}
		
		$session->destroy();
		cookie::delete('remember_code');
	}
	
	/*
		Generate random alphanumeric code. [a-zA-Z0-9]
		@param $length Length of code. Default 16.
		@return string Random alphanumeric code.
	*/
	private static function _rand_code($length=16) {

		$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';

		$code = '';

		for (;$length>0;$length--) {

			$code .= $chars[rand(0, 62)];

		}

		

		return $code;

	}
}

?>

    copy | embed

    0 comments - tagged in  posted by hongster on Aug 02, 2009 at 2:39 a.m. EDT
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