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   1  <?php
   2  // $Id: upload.inc,v 1.1.2.2 2010/08/12 16:34:08 yhahn Exp $
   3  
   4  /**
   5   * @file
   6   * Implementation of hook_diff() for file attachments.
   7   */
   8  
   9  /**
  10   * Implementation of hook_diff() for file attachments.
  11   */
  12  function upload_diff($old_node, $new_node) {
  13    $result = array();
  14    $old_files = array();
  15    if (isset($old_node->files)) {
  16      foreach ($old_node->files as $file) {
  17        $old_files[] = $file->filename;
  18      }
  19    }
  20    $new_files = array();
  21    if (isset($new_node->files)) {
  22      foreach ($new_node->files as $key => $file) {
  23        if (is_array($file)) {
  24          // During editing the files are stored as arrays, not objects.
  25          if ($file['remove']) {
  26            // It looks better if a blank line is inserted for removed files.
  27            $new_files[] = '';
  28          }
  29          else {
  30            $new_files[] = $file['filename'];
  31          }
  32        }
  33        else {
  34          $new_files[] = $file->filename;
  35        }
  36      }
  37    }
  38    $result['attachments'] = array(
  39      '#name' => t('Attachments'),
  40      '#old' => $old_files,
  41      '#new' => $new_files,
  42      '#weight' => 30,
  43      '#format' => array(
  44        'show_header' => FALSE,
  45      )
  46    );
  47    return $result;
  48  }