<?php
/*
 * (c) 2006-2007 Jon Todd <jtodd@adventexdesign.com>
 * 
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * This plugin allows you to easily include icons in your app. 
 * Assuming you have a master repository of icons, sfIcon will 
 * resize and cache your thumbnails using sfThumbnailCache.
 *
 * @package    sfIcon
 * @author     Jon Todd <jtodd@adventexdesign.com>
 */
class sfIcon
{
  /**
   * Width of the icon thumbnail in pixels
   * @access private
   * @var int
   */
   private $width;

   /**
   * Height of the icon thumbnail in pixels
   * @access private
   * @var int
   */
   private $height;

   /**
   * Name of master image
   * @access private
   * @var string
   */
   private $masterImage;
 
   /**
   * Thumbnail constructor
   * @param string  Master image name
   * @param int     (optional) width
   * @param int     (optional) height
   * @access public
   */
  public function __construct($img,$w = null ,$h = null)
  {
    $this->masterImage  = $img;
    $this->width        = $w;
    $this->height       = $h;
  }
  
  /**
   * Return url of the icon thumbnail relative to the web root
   * 
   * @author     Jon Todd <jtodd@adventexdesign.com>
   */
  public function getIcon()
  {
    // Get the full path to the base dir, by default this is the web root
    $baseDir = sfConfig::get('sf_icon_base_dir');
    
    // Get icon paths relative to webroot
    $thumb = sfConfig::get('sf_icon_thumbnail_dir').'/'.$this->masterImage;
    $master = $baseDir.sfConfig::get('sf_icon_master_dir').'/'.$this->masterImage;
    
    $type = $this->getType();
    
    return sfThumbnailCache::getNewInstance($master,
      $this->width,$this->height,true,true,
      $type['mime'],$this->stripExt($thumb).$type['ext'])->getURL();

  }
  
  /**
   * If browser doesn't support default type then use gif
   */
  private function getType()
  {
    $brows = sfBrowserDetect::getBrowser();

    if(strtolower($brows['browser']) == 'ie' && 
       $brows['majorver'] != '7')
    {
      return array('mime' => 'image/gif','ext' => '.gif');
    }
    
    return array('mime' => sfConfig::get('sf_icon_thumb_mime'),
                 'ext' => sfConfig::get('sf_icon_thumb_ext'));     
  }
  
  /**
   * Remove file extension from filename
   */
  private function stripExt($f)
  {
    return substr($f, 0, strrpos($f, '.'));
  }
}
?>