<?php
//namespace NanoMvc;

/**
 * Front controler.
 *
 * Copyright (C) 2008  Nicolas Joseph
 *
 * LICENSE:
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @package    NanoMvc
 * @author     Nicolas Joseph <gege2061@redaction-developpez.com>
 * @copyright  2008 Nicolas Joseph
 * @license    http://www.opensource.org/licenses/gpl-3.0.html GPL v3
 * @filesource
 */

$_path = dirname (__FILE__);
require_once ($_path .'/response.php');
require_once ($_path .'/request.php');
require_once ($_path .'/view.php');

/**
 * @note Classe singleton
 */
class Application
{
  /**
   * @var Response
   */
  private $response;
  /**
   * @var Request
   */
  private $request;
  /**
   * @var Application
   */
  private static $instance = null;

  private function __construct ()
  {
    $this->request = Request::get_instance ();
    $this->response = Response::get_instance ();
  }

  /**
   * Obtenir l'unique instance de la classe.
   *
   * @return Application
   */
  public static function get_instance ()
  {
    if (is_null (self::$instance))
    {
      self::$instance = new self ();
    }
    return self::$instance;
  }

  /**
   * Appel le controleur adequate en fonction de la requete de l'utilisateur.
   *
   * Cette fonction est le coeur de l'application, elle recupere la requete
   * de l'utilisateur, cree le controleur correspondant et demande son rendu
   * via la classe View pour enfin l'afficher.
   */
  public function dispatch ()
  {
    date_default_timezone_set ('Europe/Paris');
    $this->request->parse ();

    $page = $this->request->page;
    $action = $this->request->action;

    if (file_exists ($path = 'pages/'. $page .'.php'))
    {
      require_once ($path);
      $class = $page .'Page';
      $method = $action .'Action';
      $controller = new $class (new View ($page));
      $controller->execute ($action);
      $content = $controller->view->render ($this->request->get_env ());
      $this->response->set_body ($content);
    }
    else
    {
      $this->response->not_found ();
    }
    $this->response->print_out ();
  }
}