refactor(@angular/ssr): replace logic to determine the original URL

Using `currentNavigation` might not work in all cases as this will be null when the navigate has already completed.

Author: alan-agius4

packages/angular/ssr/src/utils/ng.ts

@@ -60,12 +60,12 @@ export async function renderAngular(
   serverContext: string,
 ): Promise<{ hasNavigationError: boolean; redirectTo?: string; content: () => Promise<string> }> {
   // A request to `http://www.example.com/page/index.html` will render the Angular route corresponding to `http://www.example.com/page`.
-  const urlToRender = stripIndexHtmlFromURL(url).toString();
+  const urlToRender = stripIndexHtmlFromURL(url);
   const platformRef = platformServer([
     {
       provide: INITIAL_CONFIG,
       useValue: {
-        url: urlToRender,
+        url: urlToRender.toString(),
         document: html,
       },
     },
@@ -96,31 +96,29 @@ export async function renderAngular(
       applicationRef = await bootstrap({ platformRef });
     }
 
-    const envInjector = applicationRef.injector;
-    const router = envInjector.get(Router);
-    const initialUrl = router.currentNavigation()?.initialUrl.toString();
-
     // Block until application is stable.
     await applicationRef.whenStable();
 
     // TODO(alanagius): Find a way to avoid rendering here especially for redirects as any output will be discarded.
+    const envInjector = applicationRef.injector;
     const routerIsProvided = !!envInjector.get(ActivatedRoute, null);
+    const router = envInjector.get(Router);
     const lastSuccessfulNavigation = router.lastSuccessfulNavigation();
 
     if (!routerIsProvided) {
       hasNavigationError = false;
-    } else if (lastSuccessfulNavigation?.finalUrl && initialUrl !== null) {
+    } else if (lastSuccessfulNavigation?.finalUrl) {
       hasNavigationError = false;
 
-      const { finalUrl } = lastSuccessfulNavigation;
-      const finalUrlStringified = finalUrl.toString();
-
-      if (initialUrl !== finalUrlStringified) {
-        const baseHref =
-          envInjector.get(APP_BASE_HREF, null, { optional: true }) ??
-          envInjector.get(PlatformLocation).getBaseHrefFromDOM();
+      const baseHref =
+        envInjector.get(APP_BASE_HREF, null, { optional: true }) ??
+        envInjector.get(PlatformLocation).getBaseHrefFromDOM();
+      const finalUrlStringified = lastSuccessfulNavigation.finalUrl.toString();
+      const finalUrlWithBaseHref = joinUrlParts(baseHref, finalUrlStringified);
+      const initialUrl = `${urlToRender.pathname}${urlToRender.search}${urlToRender.hash}`;
 
-        redirectTo = joinUrlParts(baseHref, finalUrlStringified);
+      if (initialUrl !== finalUrlWithBaseHref) {
+        redirectTo = finalUrlWithBaseHref;
       }
     }