<?php

/**
 * @file
 * Provides various functions for the expansion of core modules.
 *
 * Implemented:
 * - Alter menu local task links from node to insert destination parameter.
 *   Children tabs supported to level 1.
 * - Alter the confirm form cancel link to display the link as button.
 */

/**
 * Implements hook_menu().
 */
function mb_extra_menu() {
  $items = array();

  $items['admin/config/mb/buttons/more-buttons-extra'] = array(
    'page callback' => 'drupal_get_form',
    'page arguments' => array('mb_extra_admin'),
    'title' => 'Extras',
    'access arguments' => array('administer site configuration'),
    'file' => 'mb_extra.admin.inc',
    'type' => MENU_LOCAL_TASK,
    'weight' => 15
  );
  $items['admin/config/mb/buttons/more-buttons-extra/reset'] = array(
    'page callback' => 'drupal_get_form',
    'page arguments' => array('mb_extra_reset'),
    'access arguments' => array('administer site configuration'),
    'type' => MENU_CALLBACK,
    'file' => 'mb_extra.admin.inc'
  );

  return $items;
}

/**
 * Alter the local tasks to use an destination parameter.
 */
function mb_extra_menu_local_tasks_alter(&$data, $router_item, $root_path) {
  if (module_exists('overlay')) {
    return;
  }

  global $base_url;

  $module = 'mb_extra';

  if ($router_item['tab_root'] == 'node/%') {
    if (variable_get($module . '_destination_tabs', 0) == TRUE && count($data['tabs']) > 0) {
      $destination = drupal_get_destination();

      foreach (element_children($data['tabs'][0]['output']) as $key) {
        if ($data['tabs'][0]['output'][$key]['#link']['tab_root_href'] != $destination['destination'] && !stristr($destination['destination'], $data['tabs'][0]['output'][$key]['#link']['tab_root_href'])) {
          $params = $data['tabs'][0]['output'][$key]['#link'];
          $data['tabs'][0]['output'][$key]['#link']['href'] = $base_url . '/' . $params['href'] . '?destination=' . $destination['destination'];
          //$data['tabs'][0]['output'][$key]['#link']['tab_root_href'] = $base_url . '/' . $params['tab_root_href'] . '?destination=' . $destination['destination'];
          //$data['tabs'][0]['output'][$key]['#link']['tab_parent_href'] = $base_url . '/' . $params['tab_parent_href'] . '?destination=' . $destination['destination'];
        }
      }

      // Children tabs level 1.
      if (isset($data['tabs'][1])) {
        foreach (element_children($data['tabs'][1]['output']) as $key) {
          if ($data['tabs'][1]['output'][$key]['#link']['tab_root_href'] != $destination['destination']) {
            $params = $data['tabs'][1]['output'][$key]['#link'];
            $data['tabs'][1]['output'][$key]['#link']['href'] = $base_url . '/' . $params['href'] . '?destination=' . $destination['destination'];
            //$data['tabs'][0]['output'][$key]['#link']['tab_root_href'] = $base_url . '/' . $params['tab_root_href'] . '?destination=' . $destination['destination'];
            //$data['tabs'][0]['output'][$key]['#link']['tab_parent_href'] = $base_url . '/' . $params['tab_parent_href'] . '?destination=' . $destination['destination'];

            if (isset($data['tabs'][1]['output'][$key]['#active'])) {
              $data['tabs'][1]['output'][$key]['#link']['localized_options'] = array(
                'attributes' => array(
                  'class' => 'active'
                )
              );
            }
          }
        }
      }
    }
  }
}

/**
 * Implements hook_theme().
 */
function mb_extra_theme() {
  return array(
    'mb_extra_admin' => array(
      'variables' => array('form' => NULL),
    )
  );
}

/**
 * Implements hook_form_alter().
 */
function mb_extra_form_alter(&$form, &$form_state, $form_id) {
  $module = 'mb_extra';

  // Alter the confirm form cancel link to display the link as button.
  if (isset($form['confirm']) && variable_get($module . '_confirm_cancel', 0) == TRUE) {
    $form['actions']['cancel']['#attributes']['class'][] = 'button';
  }
}