<?php

/**
 * @file
 * Install, update and uninstall functions for the menu_attributes module.
 */

/**
 * Implements hook_install().
 */
function menu_attributes_install() {
  db_update('system')
    ->fields(array(
      'weight' => 10,
    ))
    ->condition('type', 'module')
    ->condition('name', 'menu_attributes')
    ->execute();
}

/**
 * Implements hook_uninstall().
 */
function menu_attributes_uninstall() {
  drupal_load('module', 'menu_attributes');
  $attributes = menu_attributes_menu_attribute_info();
  foreach (array_keys($attributes) as $attribute) {
    variable_del("menu_attributes_{$attribute}_enable");
    variable_del("menu_attributes_{$attribute}_default");
  }
}

/**
 * Update the module weight.
 */
function menu_attributes_update_1() {
  db_update('system')
    ->fields(array(
      'weight' => 10,
    ))
    ->condition('type', 'module')
    ->condition('name', 'menu_attributes')
    ->execute();
}

/**
 * Fix any menu links that had the class attribute saved as an string.
 */
function menu_attributes_update_7000(&$sandbox) {
  if (!isset($sandbox['progress'])) {
    $sandbox['progress'] = 0;
    $sandbox['current_mlid'] = 0;
    // Only count links that possibly have a key class with a string value in
    // its serialized options array.
    $sandbox['max'] = db_query("SELECT COUNT(DISTINCT mlid) FROM {menu_links} WHERE options LIKE '%s:5:\"class\";s:%'")->fetchField();
  }

  // Process twenty links at a time.
  $limit = 20;

  $links = db_query_range("SELECT mlid, options FROM {menu_links} WHERE mlid > :mlid AND options LIKE '%s:5:\"class\";s:%' ORDER BY mlid", 0, $limit, array(':mlid' => $sandbox['current_mlid']))->fetchAllKeyed();
  foreach ($links as $mlid => $options) {
    $options = unserialize($options);

    if (isset($options['attributes']['class']) && is_string($options['attributes']['class'])) {
      // Convert classes to an array.
      $options['attributes']['class'] = explode(' ', $options['attributes']['class']);
      db_update('menu_links')
        ->fields(array(
          'options' => serialize($options),
        ))
        ->condition('mlid', $mlid)
        ->execute();
    }

    $sandbox['progress']++;
    $sandbox['current_mlid'] = $mlid;
  }

  $sandbox['#finished'] = empty($sandbox['max']) ? 1 : ($sandbox['progress'] / $sandbox['max']);

  // To display a message to the user when the update is completed, return it.
  // If you do not want to display a completion message, simply return nothing.
  return t('All menu links with non-array value for class attribute have been fixed.');
}

/**
 * Grant the 'administer menu attributes' permission to roles that currently
 * have the 'administer menu' permission.
 */
function menu_attributes_update_7001() {
  $roles = user_roles(FALSE, 'administer menu');
  foreach ($roles as $rid => $role) {
    user_role_grant_permissions($rid, array('administer menu attributes'));
  }

  return t("Every role with the 'administer menu' permission has also received the 'administer menu attributes' permission.");
}