// -- copyright
// OpenProject is an open source project management software.
// Copyright (C) 2012-2020 the OpenProject GmbH
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2013 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// This program 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.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU 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.
//
// See docs/COPYRIGHT.rdoc for more details.
// ++

export class ExpressionService {

  // This is what returned by rails-angular-xss when it discovers double open curly braces
  // See https://github.com/opf/rails-angular-xss for more information.
  public static get UNESCAPED_EXPRESSION() {
    return '{{';
  }

  public static get ESCAPED_EXPRESSION() {
    return '{{ \\$root\\.DOUBLE_LEFT_CURLY_BRACE }}';
  }

  public static escape(input:string) {
    return input.replace(new RegExp(this.UNESCAPED_EXPRESSION, 'g'), this.ESCAPED_EXPRESSION);
  }

  public static unescape(input:string) {
    return input.replace(new RegExp(this.ESCAPED_EXPRESSION, 'g'), this.UNESCAPED_EXPRESSION);
  }
}