Club Drupal

<?php

/**

 * @file

 * Builds placeholder replacement tokens for diff-related data.

 */

/**

 * Implements hook_token_info().

 */

function diff_token_info() {

  $node['diff'] = array(

    'name' => t('Latest differences'),

    'description' => t('The differences between the current revision and the previous revision of this node.'),

  );

  $node['diff-markdown'] = array(

    'name' => t('Latest differences (marked down)'),

    'description' => t('The differences between the current revision and the previous revision of this node, but with a marked-down form of each revision used for comparison.'),

  );

  return array(

    'tokens' => array('node' => $node),

  );

}

/**

 * Implements hook_tokens().

 */

function diff_tokens($type, $tokens, array $data = array(), array $options = array()) {

  $sanitize = !empty($options['sanitize']);

  $replacements = array();

  if ($type == 'node' && !empty($data['node'])) {

    $node = $data['node'];

    foreach ($tokens as $name => $original) {

      switch ($name) {

        // Basic diff standard comparison information.

        case 'diff':

        case 'diff-markdown':

          $revisons = node_revision_list($node);

          if (count($revisons) == 1) {

            $replacements[$original] = t('(No previous revision available.)');

          }

          else {

            module_load_include('inc', 'diff', 'diff.pages');

            $old_vid = _diff_get_previous_vid($revisons, $node->vid);

            $state = $name == 'diff' ? 'raw' : 'raw_plain';

            $build = diff_diffs_show($node, $old_vid, $node->vid, $state);

            unset($build['diff_table']['#rows']['states']);

            unset($build['diff_table']['#rows']['navigation']);

            unset($build['diff_preview']);

            $output = drupal_render_children($build);

            $replacements[$original] = $sanitize ? check_plain($output) : $output;

          }

          break;

      }

    }

  }

  return $replacements;

}