<?php

/**
 * @file
 * Expand menu items and set active-trail according to current path.
 *
 * By default, Drupal only sets the active-trail for parent menu items if the
 * menu contains a link to the current page. This module sets the active-trail
 * according to the path URL. It works for all pages, even if they are not in
 * the menu.
 *
 * eg. if current page is 'foo/bar/zee',
 * menu items 'foo' and 'foo/bar' will be set as active-trail and expanded.
 */

/**
 * Implements hook_page_delivery_callback_alter().
 * 
 * This is the only hook that occurs after the page callback, but before
 * hook_page_build (when blocks are added). We're using this hook for its
 * timing, not its data.
 */
function menu_trail_by_path_page_delivery_callback_alter() {
  global $language;

  menu_trail_by_path_fix_cache_after_upgrade();

  $urlHelper  = new MenutrailbypathUrlHelper();
  $pathHelper = new MenutrailbypathPathHelper();
  $menuHelper = new MenutrailbypathMenuHelper($language, $urlHelper);

  // Set the active-trail for each menu containing one of the candidates.
  if (menu_trail_by_path_is_active('menu_trail')) {
    $activetrail = new MenutrailbypathActivetrail($pathHelper, $menuHelper, $urlHelper);
    $activetrail->setActivetrails();
  }

  // Set the breadcrumbs according to path URL if it is enabled in the UI.
  if (menu_trail_by_path_is_active('breadcrumb')) {
    $breadcrumb = new MenutrailbypathBreadcrumb($pathHelper, $menuHelper);
    $breadcrumb->setBreadcrumb();
  }
}

/**
 * Prevent fatal error after upgrade
 * @see https://www.drupal.org/node/2793777
 *
 * @deprecated (to be removed in 7.x-4.x)
 */
function menu_trail_by_path_fix_cache_after_upgrade() {
  if (!class_exists('MenutrailbypathUrlHelper') || !class_exists('MenutrailbypathPathHelper') || !class_exists('MenutrailbypathActivetrail') || !class_exists('MenutrailbypathUsortMenulinks')) {
    watchdog('menu_trail_by_path', 'Fixing invalid cache, you probably forgot to clear the cache after menu_trail_by_path upgrade..', array(), WATCHDOG_ERROR);
    drupal_flush_all_caches();
  }
}

/**
 * @param $type
 * @return bool
 */
function menu_trail_by_path_is_active($type) {
  switch ($type) {
    case 'breadcrumb':
      return (
        (MenutrailbypathConfig::get('breadcrumb_handling'))
        && (!path_is_admin(current_path()) || MenutrailbypathConfig::get('breadcrumb_active_on_admin_paths'))
        && (!(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest') || MenutrailbypathConfig::get('breadcrumb_active_on_ajax_requests'))
      );
      break;
    default:
      return (
        (!path_is_admin(current_path()) || MenutrailbypathConfig::get('menu_trail_active_on_admin_paths'))
        && (!(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest') || MenutrailbypathConfig::get('menu_trail_active_on_ajax_requests'))
      );
      break;
  }
}

/**
 * Implements hook_menu()
 */
function menu_trail_by_path_menu() {
  $items = array();
  $items['admin/config/search/menu_trail_by_path'] = array(
    'title' => 'Menu trail by path',
    'description' => 'Configure menu trail by path module.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('menu_trail_by_path_form'),
    'access arguments' => array('administer site configuration'),
    'file' => 'menu_trail_by_path.admin.inc',
    'type' => MENU_NORMAL_ITEM,
  );
  return $items;
}