<?php

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

use Drupal\Core\Language\Language;

/**
 * Implements hook_install().
 *
 * Enable URL language negotiation by default in order to have a basic working
 * system on multilingual sites without needing any preliminary configuration.
 */
function language_install() {
  // Enable URL language detection for each configurable language type.
  require_once DRUPAL_ROOT . '/core/includes/language.inc';
  foreach (language_types_get_configurable() as $type) {
    module_load_include('inc', 'language', 'language.negotiation');
    language_negotiation_set($type, array(LANGUAGE_NEGOTIATION_URL => 0));
  }

  // Update the language count.
  language_update_count();
}

/**
 * Implements hook_uninstall().
 */
function language_uninstall() {
  // Clear variables.
  variable_del('language_default');
  \Drupal::state()->delete('language_count');

  // Clear variables.
  variable_del('language_types');

  foreach (language_types_get_all() as $type) {
    variable_del("language_negotiation_$type");
    variable_del("language_negotiation_methods_weight_$type");
  }

  // Re-initialize the language system so successive calls to t() and other
  // functions will not expect languages to be present.
  drupal_language_initialize();

  // Force the language_count state to be 1, so that when checking if the
  // site is multilingual (for example in language_multilingual()), the result
  // will be FALSE, because the language module is not installed.
  \Drupal::state()->set('language_count', 1);
}

/**
 * Implements hook_requirements().
 */
function language_requirements($phase) {
  if ($phase == 'update') {
    // Load the include files to make constants available for updates.
    language_negotiation_include();
  }
}