ExtendedImageHelper.php

<?php

/*
 * Helper per la gestione delle immagini
 */

/**
 * Helper per il rendering delle immagini associate ad elementi del model
 * 
 * <b>Options:</b>
 * - 'absolute' - to output absolute file paths, useful for embedded images in emails
 * - 'alt'  - defaults to the file name part of the asset (capitalized and without the extension)
 * - 'size' - Supplied as "XxY", so "30x45" becomes width="30" and height="45"
 * - 'upload_dir_name' - default to "uploads"
 * 
 * @see image_tag
 * @param string $source
 * @param array $options
 * @return string 
 */
function model_image_tag($source, $options = array())
{
  if (!$source)
  {
    return '';
  }

  $options = _parse_attributes($options);

  $absolute = false;
  if (isset($options['absolute']))
  {
    unset($options['absolute']);
    $absolute = true;
  }

  if (!isset($options['upload_dir_name']))
  {
    $uploadDirName = ltrim(str_replace(sfConfig::get('sf_web_dir'), '', sfConfig::get('sf_upload_dir')), '/');
  }
  else
  {
    $uploadDirName = $options['upload_dir_name'];
    unset($options['upload_dir_name']);
  }
  
  if (!isset($options['raw_name']))
  {
    $options['src'] = _compute_public_path($source, $uploadDirName, 'png', $absolute);
  }
  else
  {
    $options['src'] = $source;
    unset($options['raw_name']);
  }

  if (isset($options['alt_title']))
  {
    // set as alt and title but do not overwrite explicitly set
    if (!isset($options['alt']))
    {
      $options['alt'] = $options['alt_title'];
    }
    if (!isset($options['title']))
    {
      $options['title'] = $options['alt_title'];
    }
    unset($options['alt_title']);
  }

  if (isset($options['size']))
  {
    list($options['width'], $options['height']) = explode('x', $options['size'], 2);
    unset($options['size']);
  }

  return tag('img', $options);
}