function state_flow_revisions_node_tab_access in State Machine 7.3

Disable Revisions tab if there are no state flow changes.

From Views, it's not possible for performance reasons. But here, with a lightweight query, we can predict if it would have results or not.

1 string reference to 'state_flow_revisions_node_tab_access'

state_flow_menu_alter in modules/state_flow/state_flow.module

Implements hook_menu_alter().

File

modules/state_flow/state_flow.module, line 128

An implementation of node revision workflow for Drupal based on the State Machine system.

Code

function state_flow_revisions_node_tab_access() {

  // The menu_get_object() would cause infinite recursion.
  $nid = (int) arg(1);
  $count = db_query("SELECT COUNT(*) FROM {state_flow_states} WHERE entity_type = 'node' and entity_id = :nid", array(
    ':nid' => $nid,
  ))
    ->fetchField();
  if ($count > 0) {
    $args = func_get_args();
    $callback = isset($args[0][0]) && is_callable($args[0][0]) ? $args[0][0] : 'views_check_perm';
    $params = isset($args[0][1]) ? $args[0][1] : array(
      'administer nodes',
    );
    return call_user_func_array($callback, $params);
  }
  return FALSE;
}