<?php

/**
 * @file
 * Internationalization (i18n) module.
 *
 * Redirect to language path when we have a translation
 * for the current language.
 */

/**
 * Implements hook_help().
 */
function i18n_redirect_help($path, $arg) {
  switch ($path) {
    case 'admin/config/regional/i18n':
      if (!module_exists('i18n_node')) {
        $output = '<p>' . t('To have <em>Translation redirect</em> working with your content you should <a href="@admin_modules">enable the <em>Multilingual content</em> module</a>.', array('@admin_modules' => url('admin/modules'))) . '</p>';
        return $output;
      }
  }
}

/**
 * Implements hook_init().
 */
function i18n_redirect_init() {
  $path = $_GET['q'];
  $language = i18n_language_interface();
  // Not for logged in users nor for home page.
  if (!$path || drupal_is_front_page() || !empty($GLOBALS['user']->uid)) {
    return;
  }
  elseif ($translations = i18n_get_path_translations($path)) {
    if (isset($translations[$language->language]) && $translations[$language->language]['href'] != $path) {
      drupal_goto($translations[$language->language]['href'], array('language' => $language), 301);
    }
  }
}
