<?php
/**
 * @file
 * Install file for the menu_breadcrumb module.
 */

/**
 * Implementation of hook_uninstall().
 */
function menu_breadcrumb_uninstall() {
  variable_del('menu_breadcrumb_append_node_title');
  variable_del('menu_breadcrumb_append_node_url');
  variable_del('menu_breadcrumb_determine_menu');
  variable_del('menu_breadcrumb_hide_on_single_item');
  variable_del('menu_breadcrumb_menu_patterns');
  variable_del('menu_breadcrumb_menus');
  variable_del('menu_breadcrumb_pattern_matches');
  variable_del('menu_breadcrumb_pattern_matches_rebuild');
}

/**
 * If people are upgrading from a patched version based on drupal.org/node/303247
 * we'll try to catch it here. Will just notify and clear the variables for now.
 */
function menu_breadcrumb_update_6100() {
  // Remove deprecated filter variable, if it exists.
  if (!is_null(variable_get('menu_breadcrumb_menus_filter', NULL))) {
    variable_del('menu_breadcrumb_menus_filter');
  }

  // Require re-configuration of the menu list, if an incompatible
  // menu_breadcrumb_default_menu variable exists.
  $menus = variable_get('menu_breadcrumb_menus', array());
  $incompatible = empty($menus['menu_breadcrumb_default_menu']);
  if ($incompatible) {
    drupal_set_message(t("Menu Breadcrumb's menu selection settings have changed recently. Please review the !settings and check that the correct menus are selected.", array('!settings' => l('Menu Breadcrumb settings', 'admin/settings/menu_breadcrumb'))), 'warning');
    variable_del('menu_breadcrumb_menus');
  }
  return array();
}