/*
 * SonarQube
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
import { translate, translateWithParameters } from '../../helpers/l10n';

module.exports = function (diff) {
  let message = '';
  if (diff.newValue != null) {
    message = translateWithParameters('issue.changelog.changed_to',
        translate('issue.changelog.field', diff.key), diff.newValue);
  } else {
    message = translateWithParameters('issue.changelog.removed',
        translate('issue.changelog.field', diff.key));
  }
  if (diff.oldValue != null) {
    message += ' (';
    message += translateWithParameters('issue.changelog.was', diff.oldValue);
    message += ')';
  }
  return message;
};