<?php
class WymeditorController extends PluginController {
  // Plugin information
  const PLUGIN_ID      = "wymeditor";
 
  // Location of the view folder
  const VIEW_FOLDER            = "wymeditor/views/";
  const PLUGIN_REL_VIEW_FOLDER = "../../plugins/wymeditor/views/";
 
  // Error types
  const ERROR_EMPTY = 'empty';
  const ERROR_NOT_EXISTING = 'not_existing';
  const ERROR_NOT_VALID = 'not_valid';
 
  /**
   * Create a new controller instance and apply the sidebar to the backend.
   */
  public function __construct() {
    AuthUser::load();
    if (!(AuthUser::isLoggedIn())) {
        redirect(get_url('login'));            
    }
    
    $this->setLayout('backend');
    $this->assignToLayout('sidebar', $this->create_view('sidebar'));    
  }
 
  /**
   * Settings function to delete the metadata table.
   */
  public function settings() {
    // TODO: There should be a better way to control access rights than copying every time
    if (!AuthUser::hasPermission('administrator') && !AuthUser::hasPermission('developer')) {
      redirect(get_url());
    }
 
    // Show the error in the view
    $error = null;
    // Previous settings
    $stylesheet = Plugin::getSetting('stylesheet', self::PLUGIN_ID);
    
    // Update request
    if (get_request_method() == 'POST' &&
     isset($_POST['stylesheet']) &&
     !empty($_POST['stylesheet'])) {
      // Give the user a second chance and preserve the value in the form
      $stylesheet = $_POST['stylesheet'];
      // Little security by only allowing '.css' files
      if (strrpos($_POST['stylesheet'], '.css') == (strlen($_POST['stylesheet']) - 4)) {
       Plugin::setSetting('stylesheet', $stylesheet, self::PLUGIN_ID);
      }
      else {
        $error = self::ERROR_NOT_VALID;
      }
    }
    
    if (!$error) {
      if (empty($stylesheet)) {
       $error = self::ERROR_EMPTY; 
      }
      elseif (!is_readable(FROG_ROOT.$stylesheet)) {
        $error = self::ERROR_NOT_EXISTING;
      }
    }
    
    $this->display('settings', array(
      'error' => $error,
      'stylesheet' => $stylesheet
    ));
  }
 
  public function stylesheet() {
    $stylesheet = Plugin::getSetting('stylesheet', self::PLUGIN_ID);
    
    if (!empty($stylesheet) && is_readable(FROG_ROOT.$stylesheet)) {
      header('content-type: text/css');
      print file_get_contents(FROG_ROOT.$stylesheet);
    }
    else {
      header("HTTP/1.0 404 Not Found"); 
      exit();
    }
  }
  
  public function environment() {
    header("content-type: text/javascript");
    $this->setLayout(null);
    
    $this->display('environment', array(
      'language'   => I18n::getLocale(),
      'stylesheet' => get_url('plugin/'.self::PLUGIN_ID.'/stylesheet'),
    ));
  }
 
  /**
   * Private function that provide the default values for the view.
   *
   * @return default values
   */
  private function get_default_view_vars() {
    $vars = array();
    
    $vars['plugin_id'] = self::PLUGIN_ID;
    $vars['plugin_url'] = get_url('plugin/'.self::PLUGIN_ID.'/');
    
    return $vars;
  }
 
  /**
   * Overwrite the render function to enforce that some variables are
   * available for the whole view artifacts.
   * Simplify the view file handling by prefixing the file with the
   * plugin directory.
   *
   * @param view the view file
   * @param vars parameter for the views
   * @return the view
   */
  /*@overwrite('render')*/
  public function render($view, $vars=array()) {
    $vars = array_merge($this->get_default_view_vars(), $vars);
 
    /* We only render views for this plugin. So add the prefix of the view folder to every view file. */      
    return parent::render(self::VIEW_FOLDER.$view, $vars);
  }
 
  /**
   * View factory for the controller and the view.
   *
   * @param view the filename without the postfix
   * @param vars the template vars
   * @return a view object
   */
  public function create_view($view, $vars=array()) {
    $vars = array_merge($this->get_default_view_vars(), $vars);
      
    return new View(self::PLUGIN_REL_VIEW_FOLDER.$view, $vars);
  }  
}
?>