<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2021 Teclib' and contributors.
 *
 * http://glpi-project.org
 *
 * based on GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2003-2014 by the INDEPNET Development Team.
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * GLPI is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GLPI is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GLPI. If not, see <http://www.gnu.org/licenses/>.
 * ---------------------------------------------------------------------
 */

$_GET['donotcheckversion']   = true;
$dont_check_maintenance_mode = true;

include ('../inc/includes.php');

header("Content-Type: application/json; charset=UTF-8");

$is_cacheable = !isset($_GET['debug']);
if (!isset($CFG_GLPI['dbversion']) || trim($CFG_GLPI['dbversion']) != GLPI_SCHEMA_VERSION) {
   // Make sure to not cache if in the middle of a GLPI update
   $is_cacheable = false;
}
if ($is_cacheable) {
   // Makes CSS cacheable by browsers and proxies
   $max_age = WEEK_TIMESTAMP;
   header_remove('Pragma');
   header('Cache-Control: public');
   header('Cache-Control: max-age=' . $max_age);
   header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + $max_age));
}

global $CFG_GLPI, $TRANSLATE;

// Default respoinse to send if locales cannot be loaded.
// Prevent JS error for plugins that does not provide any translation files
$default_response = json_encode(
   [
      '' => [
         'language'     => $CFG_GLPI['languages'][$_SESSION['glpilanguage']][1],
         'plural-forms' => 'nplurals=2; plural=(n != 1);',
      ],
   ]
);

// Get messages from translator component
$messages = $TRANSLATE->getAllMessages($_GET['domain']);
if (!($messages instanceof \Laminas\I18n\Translator\TextDomain)) {
   // No TextDomain found means that there is no translations for given domain.
   // It is mostly related to plugins that does not provide any translations.
   exit($default_response);
}

// Extract headers from main po file
$po_file = GLPI_ROOT . '/locales/' . preg_replace(
   '/\.mo$/',
   '.po',
   $CFG_GLPI['languages'][$_SESSION['glpilanguage']][1]
);
$po_file_handle = fopen(
   $po_file,
   'rb'
);
if (false === $po_file_handle) {
   Toolbox::logError(sprintf('Unable to extract locales data from "%s".', $po_file));
   exit($default_response);
}
$in_headers = false;
$headers = [];
$header_keys = ['language', 'plural-forms'];
while (false !== ($line = fgets($po_file_handle))) {
   if (preg_match('/^msgid\s+""\s*$/', $line)) {
      $in_headers = true;
      continue;
   }
   if ($in_headers && preg_match('/^msgid\s+".*"\s*$/', $line)) {
      break; // new msgid = end of headers parsing
   }
   $header = [];
   if ($in_headers && preg_match('/^"(?P<name>[a-z-]+):\s*(?P<value>.*)\\\n"\s*$/i', $line, $header)) {
      $header_name = strtolower($header['name']);
      $header_value = $header['value'];
      if (in_array($header_name, $header_keys)) {
         $headers[$header_name] = $header_value;
      }
   }
}
if (count(array_diff($header_keys, array_keys($headers))) > 0) {
   Toolbox::logError(sprintf('Missing mandatory locale headers in "%s".', $po_file));
   exit($default_response);
}

// Output messages and headers
$messages[''] = $headers;
$messages->ksort();
echo(json_encode($messages, JSON_PRETTY_PRINT));
