<?php

// singleton
class Auth extends Controller {
	
	private static $instance;
	
	private $service, $user;
	
	static public function get ( Service $service = null ) {
		
		if ( self::$instance )
			return self::$instance;
		
		return self::$instance = new self($service);
		
	}
	
	protected function __construct ( Service $service ) {
		
		parent::__construct();
		
		$this->service = $service;
		
		$this->user = $this->restore('user');
		
	}
	
	public function getUser () {
		
		return $this->user;
		
	}
	
	// Action Interface
	public function login ( $user ) {
		
		// query for ( login, pass )
		$users = $this->service;
		
		// no match ( login, pass )
		if ( empty($users[$user['login']]) )
			throw new Exception('Wrong user !');
		
		if ( $users[$user['login']]['password'] !== $user['password'] )
			throw new Exception('Wrong password !');
		
		$this->user = $users[$user['login']];
		
		$this->store('user', $this->user);
		
	}
	
	public function logout () {
		
		$this->user = null;
		$this->store('user', null);
		
		$_SESSION = array();
		
	}
	
}

?>