var assign = require('object-assign');

var GroupConstants = require('../constants/GroupConstants');

module.exports = function(state = {}, action) {
	switch (action.type) {
		case GroupConstants.GROUPS_FETCHED:
			var groups = {};
			for (var i = 0; i < action.groups.length; i++) {
				var group = action.groups[i];
				groups[group.GroupId] = group;
			}
			return groups;
		case GroupConstants.GROUP_CREATED:
		case GroupConstants.GROUP_UPDATED:
			var group = action.group;
			var groups = assign({}, state, {
				[group.GroupId]: group
			});
			return groups;
		default:
			return state;
	}
};