feat(challengestandalone): challenge standalone

libs/module-to-standalone/admin/shared/src/lib/authorized.guard.ts

@@ -0,0 +1,23 @@
+import { CanActivate, Router, UrlTree } from '@angular/router';
+
+import { AuthorizationService } from '@angular-challenges/module-to-standalone/core/service';
+import { Injectable } from '@angular/core';
+import { Observable, map } from 'rxjs';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class IsAuthorizedGuard implements CanActivate {
+  constructor(
+    private authorizationService: AuthorizationService,
+    private router: Router
+  ) {}
+
+  canActivate(): Observable<boolean | UrlTree> {
+    return this.authorizationService.isAuthorized$.pipe(
+      map((isAuthorized) =>
+        isAuthorized ? true : this.router.createUrlTree(['forbidden'])
+      )
+    );
+  }
+}