<?php

/**
 * @file
 * Cleanup menu_icons variables and menu link options.
 */

/**
 * Implements hook_uninstall().
 */
function menu_icons_uninstall() {
  // Delete variables.
  variable_del('menu_icons_file_validate_image_resolution');
  variable_del('menu_icons_default_icon');
  variable_del('menu_icons_image_folder');
  variable_del('menu_icons_position');
  variable_del('menu_icons_image_style_default');
  variable_del('menu_icons_use_css');
  variable_del('menu_icons_absolute_links');

  // Clean up menu link options.
  // Fetch menu links that we've modified.
  $result = db_query("SELECT mlid, options FROM {menu_links} WHERE options LIKE '%menu_icon%'");
  foreach ($result as $record) {
    $mlid = $record->mlid;
    $options = unserialize($record->options);
    if (isset($options['menu_icon'])) {
      unset($options['menu_icon']);
    }
    for ($i = 0; $i <= count($options['attributes']['class']); $i++) {
      if ($options['attributes']['class'][$i] == 'menu_icon') {
        unset($options['attributes']['class'][$i]);
      }
      elseif ($options['attributes']['class'][$i] == 'menu-' . $mlid) {
        unset($options['attributes']['class'][$i]);
      }
    }
    // Save the updated options.
    db_update('menu_links')
    ->fields(array(
      'options' => serialize($options),
    ))
    ->condition('mlid', $mlid)
    ->execute();
  }

  // Remove the generated CSS file.
  file_unmanaged_delete('public://css/menu_icons.css');
}

/**
 * Keep existing sites using absolute URLS in CSS.
 */
function menu_icons_update_7200() {
  variable_set('menu_icons_absolute_links', TRUE);
}