@Override
  protected void formInnerEvent(UserRequest ureq, FormItem source, FormEvent event) {
    super.formInnerEvent(ureq, source, event);
    if (source == cancelButton) {
      fireEvent(ureq, Event.CANCELLED_EVENT);

    } else if (source == importFile) {
      if (importFile.isUploadSuccess()) {
        File tmpJar = importFile.getUploadFile();
        Set<String> importLangKeys =
            I18nManager.getInstance().sarchForAvailableLanguagesInJarFile(tmpJar, true);
        if (importLangKeys.size() == 0) {
          showError("configuration.management.package.import.failure.empty");
          return;
        }
        //
        // enable language key selection
        String[] langKeys = ArrayHelper.toArray(importLangKeys);
        importKeys.setKeysAndValues(langKeys, langKeys);
        importKeys.selectAll();
        importKeys.setVisible(true);
        // In language adaption mode the import is done as a package - can't deselect anything
        importKeys.setEnabled(false);
      }
    }
  }
 private void uploadFiles(FileElement attachmentFileElement) {
   VFSLeaf uploadedItem = new LocalFileImpl(attachmentFileElement.getUploadFile());
   ProjectBrokerManagerFactory.getProjectBrokerManager()
       .saveAttachedFile(
           project,
           attachmentFileElement.getUploadFileName(),
           uploadedItem,
           courseEnv,
           courseNode);
 }
  @Override
  protected void formOK(UserRequest ureq) {
    if (importKeys.isVisible() && importKeys.getSelectedKeys().size() > 0) {
      Collection<String> importLangKeys = importKeys.getSelectedKeys();
      Set<String> alreadyInstalledLangs = new HashSet<String>();
      for (String langKey : importLangKeys) {
        if (I18nModule.getAvailableLanguageKeys().contains(langKey)) {
          alreadyInstalledLangs.add(langKey);
        }
      }
      if (I18nModule.isTransToolEnabled()) {
        // In translation mode importing will copy the language package
        // over an existing language or create a new language
        File tmpJar = importFile.getUploadFile();
        I18nManager.getInstance().copyLanguagesFromJar(tmpJar, importLangKeys);
        logAudit("Uploaded languages from jar::" + importFile.getUploadFileName(), null);
        showInfo("configuration.management.package.import.success", importLangKeys.toString());

      } else {
        // In language adaption mode: import is copied to user managed i18n package space in
        // olatdata
        if (alreadyInstalledLangs.size() == importLangKeys.size()) {
          showError("configuration.management.package.import.failure.installed");
          return;
        }
        // Ok, contains at least one language, copy to lang pack dir
        importFile.moveUploadFileTo(I18nModule.LANG_PACKS_DIRECTORY);
        logAudit("Uploaded language pack::" + importFile.getUploadFileName(), null);

        if (alreadyInstalledLangs.size() > 0) {
          getWindowControl()
              .setWarning(
                  getTranslator()
                      .translate(
                          "configuration.management.package.import.success.with.existing",
                          new String[] {
                            importLangKeys.toString(), alreadyInstalledLangs.toString()
                          }));
        } else {
          showInfo("configuration.management.package.import.success", importLangKeys.toString());
        }
      }
      // Reset i18n system
      I18nModule.reInitializeAndFlushCache();
      fireEvent(ureq, Event.DONE_EVENT);
    }
  }