materio-base-d7/sites/all/modules/contrib/seo/metatag/metatag_hreflang/metatag_hreflang.install

<?php

/**
 * @file
 * Various update scripts for Metatag:hrelang.
 */

/**
 * Implements hook_requirements().
 */
function metatag_hreflang_requirements($phase) {
  $requirements = array();
  // Ensure translations don't break during installation.
  $t = get_t();

  if ($phase == 'runtime') {
    // Check if the Alternative Hreflang module is present.
    if (module_exists('hreflang')) {
      $requirements['metatag_hreflang'] = array(
        'severity' => REQUIREMENT_ERROR,
        'title' => 'Metatag',
        'value' => $t('The Metatag:hreflang module should not be used at the same time as the hreflang module.'),
        'description' => $t('If both the Metatag:hreflang module and the Alternative Hreflang (hreflang) module are used at the same time it is likely that they will output duplicate meta tags. As a result, it is recommended to only use one at a time.'),
      );
    }
  }

  return $requirements;
}

/**
 * Implements hook_uninstall().
 */
function metatag_hreflang_uninstall() {
  // Delete any custom variables that are used.
  variable_del('metatag_hreflang_allow_dupe');
}

/**
 * Implementations of hook_update_N().
 */

/**
 * Clear the Metatag cache so the updated hreflang default is caught.
 */
function metatag_hreflang_update_7101() {
  cache_clear_all('*', 'cache_metatag', TRUE);
  return t('All Metatag caches cleared.');
}

/**
 * Fix hreflang=xdefault for config definitions.
 */
function metatag_hreflang_update_7102() {
  module_load_include('install', 'metatag');
  $meta_tag = 'hreflang_xdefault';
  $old_value = '[node:source:url]';
  $new_value = '[node:url-original]';
  return metatag_update_replace_config_value($meta_tag, $old_value, $new_value);
}

/**
 * Fix hreflang=xdefault for all entities.
 */
function metatag_hreflang_update_7103() {
  module_load_include('install', 'metatag');
  $meta_tag = 'hreflang_xdefault';
  $old_value = '[node:source:url]';
  $new_value = '[node:url-original]';
  return metatag_update_replace_entity_value($sandbox, $meta_tag, $old_value, $new_value);
}