//-- 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;
};