<?php
/**
 * Layout components
 * Components that are general to the layout of the 
 * PAE site
 *
 * @package pae
 * @subpackage layout
 * @author Benjamin Ramey <ben.ramey@gmail.com>
 **/
class layoutComponents extends sfComponents
{
  /**
   * Shows a link to the contact page to easily be put
   * on any page after larger blocks of text
   *
   * @return void
   * @author Benjamin Ramey <ben.ramey@gmail.com>
   **/
  public function executeContactUsLink()
  {
  }
  
  /**
   * Logic behind sidebarPicture component
   * Grabs a random picture from the sidebar images folder
   * and gives it to the partial template
   *
   * @return void
   * @author Benjamin Ramey <ben.ramey@gmail.com>
   **/
  public function executeSidebarPicture()
  {
    $imagesDir = implode(DIRECTORY_SEPARATOR, array(sfConfig::get('sf_web_dir'), "images", "sidebar"));
    
    if(!$this->OnHomePage())
    {
      $this->pictureURL = $this->GetRandomImage($imagesDir);
    }
    else
    {
      $this->pictureURL = sfConfig::get("app_home_sidebar_image");
    }
  }
  
  /**
   * Logic behind panoramaPicture component
   * Grabs a random picture from the panorama images folder
   * and gives it to the partial template
   *
   * @return void
   * @author Benjamin Ramey <ben.ramey@gmail.com>
   **/
  public function executePanoramaPicture()
  {
    $imagesDir = implode(DIRECTORY_SEPARATOR, array(sfConfig::get('sf_web_dir'), "images", "panorama"));
    
    if($this->ShowPanorama())
    {
      $this->pictureURL = $this->GetRandomImage($imagesDir);
    }
  }
  
  /**
   * Returns true if we are on the homepage
   *
   * @return boolean
   * @author Benjamin Ramey <ben.ramey@gmail.com>
   **/
  private function OnHomePage()
  {
    $routing = sfRouting::getInstance();
    $homepageRte = $routing->getRouteByName('homepage');
    $homepageMod = $homepageRte[4]["module"];
    $homepageAction = $homepageRte[4]["action"];
    
    if($this->getModuleName() == $homepageMod
        && $this->getActionName() == $homepageAction)
    {
      return true;
    }
    else
    {
      return false;
    }
  }
  
  /**
   * Determines whether the panorama image should be show
   * Some pages do not display it
   *
   * @return boolean
   * @author Benjamin Ramey <ben.ramey@gmail.com>
   **/
  private function ShowPanorama()
  {
    if($this->OnHomePage()
        || $this->getModuleName() == "whoarewe"
        || ($this->getModuleName() == "info"
            && ($this->getActionName() == "events"
                || $this->getActionName() == "film")))
      return false;
      
    return true;
  }
  
  /**
   * Returns a random file name from the 
   * directory that is passed to it
   *
   * @return void
   * @author Benjamin Ramey <ben.ramey@gmail.com>
   **/
  private function GetRandomImage($imagesDir)
  {
	  $images = scandir($imagesDir);
  	$images = $this->GetImagesFromFolder($images,$imagesDir);
	
  	$count = count($images);
  	$randomImage = null;
  	if($count > 0)
  	  $randomImage = $images[floor(rand(0,$count - 1))];
	
  	return($randomImage);
  }
  
  private function GetImagesFromFolder($files)
  {
    $images = array();
    foreach($files as $key => $value)
    {
      if(preg_match("/(png|jpg|gif)$/i", $value) > 0)
      {
        array_push($images, $value);
      }
    }
    
    return($images);
  }
}