text: //-- copyright
  // OpenProject is a project management system.
  // Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
  //
  // 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 doc/COPYRIGHT.rdoc for more details.
  //++
  
  module.exports = function() {
    var ApiHelper = {
      handleError: function(scope, error) {
        scope.$emit('flashMessage', {
          isError: true,
          text: ApiHelper.getErrorMessage(error)
        });
      },
  
      getErrorMessage: function(error) {
        if(error.status == 500) {
          return error.statusText;
        } else {
          var response = JSON.parse(error.responseText);
          var messages = [];
          var message;
  
          if (ApiHelper.isMultiErrorMessage(response)) {
            angular.forEach(response._embedded.errors, function(error) {
              this.push(error.message);
            }, messages);
          } else {
            messages.push(response.message);
          }
  
          message = messages.join(' ');
  
          return message;
        }
      },
  
      isMultiErrorMessage: function(error) {
        return error.errorIdentifier == 'urn:openproject-org:api:v3:errors:MultipleErrors';
      }
    };
  
    return ApiHelper;
  };
  