//-- 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() {

  return {
    restrict: 'A',
    scope: true,
    compile: function(tElement) {
      return {
        pre: function(scope, iElement, iAttrs, controller) {
          scope.currentGroup = scope.row.groupName;

          function setSums() {
            if(scope.groupSums == null) return;
            scope.sums = scope.groupSums.map(function(groupSum){
              return groupSum[scope.currentGroup];
            });
          }

          scope.$watch('groupSums.length', function(newVal, oldVal) {
            if(newVal != oldVal) {
              // map columns to sums if the column data is a number
              setSums();
            }
          });
        }
      };
    }
  };
};