A simple url loading mixin

_URLMixin.js

define([
    'dojo/_base/declare',
    'dojo/_base/lang'
], function (declare, lang) {


    return declare(null, {

        /**
         * wait for previous config loaders then update the config object
         */
        loadConfig: function (wait) {
            if (wait) {
                wait.then(lang.hitch(this, 'checkURLParams'));
            } else {
                this.checkURLParams();
            }

            return wait || this.inherited(arguments);
        },

        /**
         * parse and check for valid url parameters and update the map config accordingly
         */
        checkURLParams: function () {
            var search = location.search.substring(1);
            if (!search) {
                return;
            }
            search = JSON.parse('{"' + decodeURI(search).replace(/"/g, '\\"').replace(/&/g, '","').replace(/=/g, '":"') + '"}');

            if (search.center) {

                // look for coordinates in the center parameter something like 40000,23123.2423
                // here we're assuming the coordinates passed are in lat/lon
                this.config.mapOptions.center = search.center.split(',');
            }

            if (search.zoom) {

                // look for a zoom parameter
                // something like 15
                this.config.mapOptions.zoom = parseInt(search.zoom, 10);
            }
        }
    });

});

app.js

define([
    'dojo/_base/declare',

    // minimal Base Controller
    'viewer/_ControllerBase',

    // *** Controller Mixins
    // Use the core mixins, add custom mixins
    // or replace core mixins with your own
    'viewer/_ConfigMixin', // manage the Configuration
    'viewer/_LayoutMixin', // build and manage the Page Layout and User Interface
    'viewer/_MapMixin', // build and manage the Map
    'viewer/_WidgetsMixin', // build and manage the Widgets
    'config/_URLMixin',

    //include our apps css
    'xstyle/css!./css/main.css'
], function (
    declare,
    _ControllerBase,
    _ConfigMixin,
    _LayoutMixin,
    _MapMixin,
    _WidgetsMixin,
    _URLMixin
    //_MyCustomMixin
) {
    return declare([
        _URLMixin, // add a url mixin!
        _ConfigMixin,
        _LayoutMixin,
        _MapMixin,
        _WidgetsMixin,
        _ControllerBase
    ]);
});