function menu_position_enable in Menu Position 6

Same name and namespace in other branches

1. 7.2 menu_position.install \menu_position_enable()
2. 7 menu_position.install \menu_position_enable()

Implements hook_enable().

When the module is disabled, the menu links it owns are deleted. When re-enabling this module, we need to ensure that any menu links are re-created and to re-configure any old rules existing in the database.

File

./menu_position.install, line 86

Provides install, update and un-install functions for menu_position.

Code

function menu_position_enable() {
  $enabled_rules = db_result(db_query('SELECT count(*) AS rule_count FROM {menu_position_rules} WHERE enabled = 1'));
  if ($enabled_rules) {
    drupal_set_message(t('Existing menu position rules were discovered. To ensure they continue to work, visit the <a href="!url">menu position rules admin page</a>.', array(
      '!url' => url('admin/build/menu-position'),
    )), 'error');

    // If we were to attempt menu_position_add_menu_link() here it would fail
    // because the module's router item isn't in the system yet. Instead we flag
    // the rule with a zero-value mlid and fix it in
    // menu_position_rules_form_callback().
    db_query('UPDATE {menu_position_rules} SET mlid = 0 WHERE enabled = 1');
  }
}