Prevent ajax race conditions when using routes by offering a callback that is...

Prevent ajax race conditions when using routes by offering a callback that is run after the the routes have finished loading

core/js/router.js

 OC.router_base_url = OC.webroot + '/index.php/',
 OC.Router = {
+	loadedCallback: null,
+	// register your ajax requests to load after the loading of the routes
+	// has finished. otherwise you face problems with race conditions
+	registerLoadedCallback: function(callback){
+		if(this.routes_request.state() === 'resolved'){
+			callback();
+		} else {
+			this.loadedCallback = callback;
+		}
+	},
 	routes_request: $.ajax(OC.router_base_url + 'core/routes.json', {
 		dataType: 'json',
 		success: function(jsondata) {
-			if (jsondata.status == 'success') {
+			if (jsondata.status === 'success') {
 				OC.Router.routes = jsondata.data;
+				if(OC.Router.loadedCallback !== null){
+					OC.Router.loadedCallback();
+				}
 			}
 		}
 	}),
 	generate:function(name, opt_params) {
 		if (!('routes' in this)) {
 			if(this.routes_request.state() != 'resolved') {
-				alert('wait');// wait
+				alert('To avoid race conditions, please register a callback');// wait
 			}
 		}
 		if (!(name in this.routes)) {