// {{{ICINGA_LICENSE_CODE}}}
// -----------------------------------------------------------------------------
// This file is part of icinga-web.
//
// Copyright (c) 2009-2015 Icinga Developer Team.
// All rights reserved.
//
// icinga-web 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 3 of the License, or
// (at your option) any later version.
//
// icinga-web 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 icinga-web.  If not, see <http://www.gnu.org/licenses/>.
// -----------------------------------------------------------------------------
// {{{ICINGA_LICENSE_CODE}}}
(function () {
    "use strict";

    // Object.keys
    // see https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Object/keys
    // JS 1.8.5 / ECMA 5
    if (!Object.keys) {
        Object.keys = (function () {
            var hasOwnProperty = Object.prototype.hasOwnProperty,
                hasDontEnumBug = !({
                    toString: null
                }).propertyIsEnumerable('toString'),
                dontEnums = [
                    'toString',
                    'toLocaleString',
                    'valueOf',
                    'hasOwnProperty',
                    'isPrototypeOf',
                    'propertyIsEnumerable',
                    'constructor'
                ],
                dontEnumsLength = dontEnums.length;

            return function (obj) {
                if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) {
                    throw new TypeError('Object.keys called on non-object');
                }

                var result = [];

                for (var prop in obj) {
                    if (hasOwnProperty.call(obj, prop)) {
                        result.push(prop);
                    }
                }

                if (hasDontEnumBug) {
                    for (var i = 0; i < dontEnumsLength; i++) {
                        if (hasOwnProperty.call(obj, dontEnums[i])) {
                            result.push(dontEnums[i]);
                        }
                    }
                }
                return result;
            };
        })();
    }
})();
