<?php

function i18n($i18n)
{
  return [
    'translate' => function ($id) use ($i18n) {
      return $i18n[$_GET['lang'] ?? 'de'][$id] ?? $i18n['de'][$id];
    },

    'link_page' => function ($page) {
      $locale = $_GET['lang'] ?? 'de';
      $page = trim($page, '/');
      $link = "/$locale/$page";

      return $link;
    },

    'link_language' => function ($locale) {
      $page = trim($_GET['page'], '/');
      $link = "/$locale/$page";

      return $link;
    },

    'inactive_languages' => function () {
      return array_values(array_diff(['de', 'en', 'jp'], [$_GET['lang'] ?? 'de']));
    },
  ];
}