<?php

/*

  Belokan Micro Framework

  Licensed under GNU GPL

  http://gitorious.org/belokan

  ---

  Belokan/Belokan.php:

  Belokan core class

*/

class Belokan {

  private

    $_config;

  public function __construct ($config_file=null)

  {

    spl_autoload_register('Belokan::autoloader');

    $this->_config = Belokan_Config::getInstance();

    if ($config_file != null) $this->_config->loadFile($config_file);

  }

  public function run ()

  {

    $logBelokan = $this->_config->get('log', 'belokan');

    $log = Belokan_Log::getInstance();

    $req = Belokan_Request::getInstance();

    $ctrl = $req->getController();

    $action = $req->getAction();

    $ctrlClass = $ctrl.'Controller';

    $actionMethod = $action.'Action';

    $RESTCtrl = false;

    if (!class_exists($ctrlClass)) {

      if ($logBelokan)

        $log->add('Belokan', 'Request unknown controller ('.$ctrl.'). HTTP 404 error generated.');

      $actionMethod = 'e404';

      $ctrlInstance = new HttpErrorsController('HttpErrors', 'e404');

    } else {

      $ctrlInstance = new $ctrlClass($ctrl, $action);

      $RESTCtrl = $ctrlInstance instanceof Belokan_REST_Controller;

      if (!$RESTCtrl && !method_exists($ctrlClass, $actionMethod)) {

        if ($logBelokan)

          $log->add('Belokan', 'Request unknown action ('.$action.') for controller '.$ctrl.'. HTTP 404 error generated.');

        $actionMethod = 'e404';

        $ctrlInstance = new HttpErrorsController('HttpErrors', 'e404');

      }

    }

    if ($RESTCtrl) $ctrlInstance->setView('default');

    if ($ctrlInstance->_pre_action() !== false) {

      $actionReturnValue = ($RESTCtrl) ?

        call_user_func(array($ctrlInstance, strtolower($req->getMethod())), $action)

        : call_user_func(array($ctrlInstance, $actionMethod));

      if ($actionReturnValue !== false)

        $ctrlInstance->_post_action();

    }

    $ctrlInstance->_view->renderLayoutBefore($layout = $ctrlInstance->getLayout());

    $ctrlInstance->_pre_view();

    $ctrlInstance->_view->renderView($ctrlInstance->getView());

    $ctrlInstance->_post_view();

    $ctrlInstance->_view->renderLayoutAfter($layout);

    $ctrlInstance->_post_render();

  }

  public static function autoloader ($class_name)

  {

    if (substr($class_name, 0, 8) == 'Belokan_')

      $classPath = dirname(__FILE__).str_replace('_', '/', substr($class_name, 7)).'.php';

    else if (substr($class_name, -10) == 'Controller')

      $classPath = Belokan_Config::getInstance()->get('dir', 'controllers').substr($class_name, 0, -10).'.php';

    else {

      $classPath = Belokan_Config::getInstance()->get('dir', 'models').str_replace('_', '/', $class_name).'.php';

      if (!file_exists($classPath) && Belokan_Config::getInstance()->exists('dir', 'lib'))

        $classPath = Belokan_Config::getInstance()->get('dir', 'lib').str_replace('_', '/', $class_name).'.php';

    }

    if (file_exists($classPath)) {

      require_once $classPath;

      return true;

    } else {

      if (Belokan_Config::getInstance()->get('log', 'belokan'))

        Belokan_Log::getInstance()->add('Belokan', 'ERROR: Trying to load an inexistant class ('.$class_name.').');

      return false;

    }

  }

}