feat: add alternative server for purposes of switching to API v1 (#571)

* feat: add alternative server for purposes of switching to API v1

* fix: naming of next version sync server host variable

app/assets/javascripts/app.ts

@@ -88,7 +88,8 @@ function reloadHiddenFirefoxTab(): boolean {
 
 const startApplication: StartApplication = async function startApplication(
   defaultSyncServerHost: string,
-  bridge: Bridge
+  bridge: Bridge,
+  nextVersionSyncServerHost: string,
 ) {
   if (reloadHiddenFirefoxTab()) {
     return;
@@ -105,6 +106,7 @@ const startApplication: StartApplication = async function startApplication(
     .config(configRoutes)
     .constant('bridge', bridge)
     .constant('defaultSyncServerHost', defaultSyncServerHost)
+    .constant('nextVersionSyncServerHost', nextVersionSyncServerHost)
     .constant('appVersion', bridge.appVersion);
 
   // Controllers
@@ -186,7 +188,8 @@ const startApplication: StartApplication = async function startApplication(
 if (__WEB__) {
   startApplication(
     (window as any)._default_sync_server,
-    new BrowserBridge(__VERSION__)
+    new BrowserBridge(__VERSION__),
+    (window as any)._next_version_sync_server
   );
 } else {
   (window as any).startApplication = startApplication;

app/assets/javascripts/startApplication.ts

@@ -2,5 +2,6 @@ import { Bridge } from "./services/bridge";
 
 export type StartApplication = (
   defaultSyncServerHost: string,
-  bridge: Bridge
+  bridge: Bridge,
+  nextVersionSyncServerHost: string
 ) => Promise<void>;

app/assets/javascripts/ui_models/application.ts

@@ -53,6 +53,7 @@ export class WebApplication extends SNApplication {
     scope: angular.IScope,
     defaultSyncServerHost: string,
     public bridge: Bridge,
+    nextVersionSyncServerHost: string,
   ) {
     super(
       bridge.environment,
@@ -62,7 +63,8 @@ export class WebApplication extends SNApplication {
       new AlertService(),
       identifier,
       [],
-      defaultSyncServerHost
+      defaultSyncServerHost,
+      nextVersionSyncServerHost,
     );
     this.$compile = $compile;
     this.scope = scope;

app/assets/javascripts/ui_models/application_group.ts

@@ -28,7 +28,8 @@ export class ApplicationGroup extends SNApplicationGroup {
     $rootScope: ng.IRootScopeService,
     $timeout: ng.ITimeoutService,
     private defaultSyncServerHost: string,
-    private bridge: Bridge
+    private bridge: Bridge,
+    private nextVersionSyncServerHost: string,
   ) {
     super(new WebDeviceInterface($timeout, bridge));
     this.$compile = $compile;
@@ -62,7 +63,8 @@ export class ApplicationGroup extends SNApplicationGroup {
       this.$compile,
       scope,
       this.defaultSyncServerHost,
-      this.bridge
+      this.bridge,
+      this.nextVersionSyncServerHost,
     );
     const appState = new AppState(
       this.$rootScope,