function menu_nodeapi in Drupal 6

Same name and namespace in other branches

1. 4 modules/menu.module \menu_nodeapi()
2. 5 modules/menu/menu.module \menu_nodeapi()

Implementation of hook_nodeapi().

File

modules/menu/menu.module, line 293

Allows administrators to customize the site navigation menu.

Code

function menu_nodeapi(&$node, $op) {
  switch ($op) {
    case 'insert':
    case 'update':
      if (isset($node->menu)) {
        $item =& $node->menu;
        if (!empty($item['delete'])) {
          menu_link_delete($item['mlid']);
        }
        elseif (trim($item['link_title'])) {
          $item['link_title'] = trim($item['link_title']);
          $item['link_path'] = "node/{$node->nid}";
          if (!$item['customized']) {
            $item['options']['attributes']['title'] = trim($node->title);
          }
          if (!menu_link_save($item)) {
            drupal_set_message(t('There was an error saving the menu link.'), 'error');
          }
        }
      }
      break;
    case 'delete':

      // Delete all menu module links that point to this node.
      $result = db_query("SELECT mlid FROM {menu_links} WHERE link_path = 'node/%d' AND module = 'menu'", $node->nid);
      while ($m = db_fetch_array($result)) {
        menu_link_delete($m['mlid']);
      }
      break;
    case 'prepare':
      if (empty($node->menu)) {

        // Prepare the node for the edit form so that $node->menu always exists.
        $menu_name = variable_get('menu_default_node_menu', 'primary-links');
        $item = array();
        if (isset($node->nid)) {

          // Give priority to the default menu
          $mlid = db_result(db_query_range("SELECT mlid FROM {menu_links} WHERE link_path = 'node/%d' AND menu_name = '%s' AND module = 'menu' ORDER BY mlid ASC", $node->nid, $menu_name, 0, 1));

          // Check all menus if a link does not exist in the default menu.
          if (!$mlid) {
            $mlid = db_result(db_query_range("SELECT mlid FROM {menu_links} WHERE link_path = 'node/%d' AND module = 'menu' ORDER BY mlid ASC", $node->nid, 0, 1));
          }
          if ($mlid) {
            $item = menu_link_load($mlid);
          }
        }

        // Set default values.
        $node->menu = $item + array(
          'link_title' => '',
          'mlid' => 0,
          'plid' => 0,
          'menu_name' => $menu_name,
          'weight' => 0,
          'options' => array(),
          'module' => 'menu',
          'expanded' => 0,
          'hidden' => 0,
          'has_children' => 0,
          'customized' => 0,
        );
      }

      // Find the depth limit for the parent select.
      if (!isset($node->menu['parent_depth_limit'])) {
        $node->menu['parent_depth_limit'] = _menu_parent_depth_limit($node->menu);
      }
      break;
  }
}