function _locale_rebuild_js

(Re-)Creates the JavaScript translation file for a language.

Parameters

string $langcode: The language code for which the translation file should be (re)created.

Return value

bool: TRUE if the translation file was created successfully, FALSE otherwise.

File

core/includes/locale.inc, line 753

Administration functions for locale.module.

Code

function _locale_rebuild_js($langcode = NULL) {
  if (!isset($langcode)) {
    $language = $GLOBALS['language'];
  }
  else {
    // Get information about the locale.
    $languages = language_list();
    $language = $languages[$langcode];
  }

  // Construct the array for JavaScript translations.
  // Only add strings with a translation to the translations array.
  $result = db_query("SELECT s.lid, s.source, s.context, t.translation FROM {locales_source} s INNER JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.location LIKE '%.js%'", array(':language' => $language->langcode));

  $translations = array();
  foreach ($result as $data) {
    $translations[$data->context][$data->source] = $data->translation;
  }

  // Construct the JavaScript file, if there are translations.
  $data_hash = NULL;
  $data = $status = '';
  if (!empty($translations)) {

    $data = "Backdrop.locale = { ";

    $locale_plurals = state_get('locale_translation_plurals', array());
    if (!empty($locale_plurals[$language->langcode])) {
      $data .= "'pluralFormula': function (\$n) { return Number({$locale_plurals[$language->langcode]['formula']}); }, ";
    }

    $data .= "'strings': " . backdrop_json_encode($translations) . " };";
    $data_hash = backdrop_hash_base64($data);
  }

  // Construct the filepath where JS translation files are stored.
  $dir = 'public://' . settings_get('locale_js_directory', 'languages');

  // Delete old file, if we have no translations anymore, or a different file to be saved.
  $locale_javascripts = state_get('locale_translation_javascript', array());
  $changed_hash = !isset($locale_javascripts[$language->langcode]) || ($locale_javascripts[$language->langcode] != $data_hash);
  if (!empty($locale_javascripts[$language->langcode]) && (!$data || $changed_hash)) {
    file_unmanaged_delete($dir . '/' . $language->langcode . '_' . $locale_javascripts[$language->langcode] . '.js');
    $locale_javascripts[$language->langcode] = '';
    $status = 'deleted';
  }

  // Only create a new file if the content has changed or the original file got
  // lost.
  $dest = $dir . '/' . $language->langcode . '_' . $data_hash . '.js';
  if ($data && ($changed_hash || !file_exists($dest))) {
    // Ensure that the directory exists and is writable, if possible.
    file_prepare_directory($dir, FILE_CREATE_DIRECTORY);

    // Save the file.
    if (file_unmanaged_save_data($data, $dest)) {
      $locale_javascripts[$language->langcode] = $data_hash;
      // If we deleted a previous version of the file and we replace it with a
      // new one we have an update.
      if ($status == 'deleted') {
        $status = 'updated';
      }
      // If the file did not exist previously and the data has changed we have
      // a fresh creation.
      elseif ($changed_hash) {
        $status = 'created';
      }
      // If the data hash is unchanged the translation was lost and has to be
      // rebuilt.
      else {
        $status = 'rebuilt';
      }
    }
    else {
      $locale_javascripts[$language->langcode] = '';
      $status = 'error';
    }
  }

  // Save the new JavaScript hash (or an empty value if the file just got
  // deleted). Act only if some operation was executed that changed the hash
  // code.
  if ($status && $changed_hash) {
    state_set('locale_translation_javascript', $locale_javascripts);
  }

  // Log the operation and return success flag.
  switch ($status) {
    case 'updated':
      watchdog('locale', 'Updated JavaScript translation file for the language %language.', array('%language' => $language->name));
      return TRUE;
    case 'rebuilt':
      watchdog('locale', 'JavaScript translation file %file.js was lost.', array('%file' => $locale_javascripts[$language->langcode]), WATCHDOG_WARNING);
      // Proceed to the 'created' case as the JavaScript translation file has
      // been created again.
    case 'created':
      watchdog('locale', 'Created JavaScript translation file for the language %language.', array('%language' => $language->name));
      return TRUE;
    case 'deleted':
      watchdog('locale', 'Removed JavaScript translation file for the language %language because no translations currently exist for that language.', array('%language' => $language->name));
      return TRUE;
    case 'error':
      watchdog('locale', 'An error occurred during creation of the JavaScript translation file for the language %language.', array('%language' => $language->name), WATCHDOG_ERROR);
      return FALSE;
    default:
      // No operation needed.
      return TRUE;
  }
}