function path_nodeapi in Drupal 4

Same name and namespace in other branches

1. 5 modules/path/path.module \path_nodeapi()
2. 6 modules/path/path.module \path_nodeapi()

Implementation of hook_nodeapi().

Allows URL aliases for nodes to be specified at node edit time rather than through the administrative interface.

File

modules/path.module, line 203

Enables users to rename URLs.

Code

function path_nodeapi(&$node, $op, $arg) {
  if (user_access('create url aliases') || user_access('administer url aliases')) {
    switch ($op) {
      case 'validate':
        $node->path = trim($node->path);
        if ($node->path && !valid_url($node->path)) {
          form_set_error('path', t('The path is invalid.'));
        }
        else {
          if (db_result(db_query("SELECT COUNT(dst) FROM {url_alias} WHERE dst = '%s' AND src != '%s'", $node->path, "node/{$node->nid}"))) {
            form_set_error('path', t('The path is already in use.'));
          }
        }
        break;
      case 'load':
        $path = "node/{$node->nid}";

        // We don't use drupal_get_path_alias() to avoid custom rewrite functions.
        // We only care about exact aliases.
        $result = db_query("SELECT dst FROM {url_alias} WHERE src = '%s'", $path);
        if (db_num_rows($result)) {
          $node->path = db_result($result);
        }
        break;
      case 'insert':

        // Don't try to insert if path is NULL.  We may have already set
        // the alias ahead of time.
        if ($node->path) {
          path_set_alias("node/{$node->nid}", $node->path);
        }
        break;
      case 'update':
        path_set_alias("node/{$node->nid}", $node->path, $node->pid);
        break;
      case 'delete':
        $path = "node/{$node->nid}";
        if (drupal_get_path_alias($path) != $path) {
          path_set_alias($path);
        }
        break;
    }
  }
}