feat: signal server tag

toju-app/src/app/domains/authentication/domain/logic/auth-navigation.rules.ts

@@ -0,0 +1,45 @@
+import {
+  filter,
+  map,
+  Observable,
+  take
+} from 'rxjs';
+
+import { UsersActions } from '../../../../store/users/users.actions';
+import type { User } from '../../../../shared-kernel';
+
+export type AuthenticationOutcome =
+  | { kind: 'success'; user: User }
+  | { kind: 'failure'; error: string };
+
+export function waitForAuthenticationOutcome(
+  actions$: Observable<{ type: string; user?: User; error?: string }>
+): Observable<AuthenticationOutcome> {
+  return actions$.pipe(
+    filter((action) =>
+      action.type === UsersActions.setCurrentUser.type
+      || action.type === UsersActions.loadCurrentUserFailure.type
+    ),
+    take(1),
+    map((action) => {
+      if (action.type === UsersActions.loadCurrentUserFailure.type) {
+        return {
+          kind: 'failure' as const,
+          error: action.error || 'Authentication failed'
+        };
+      }
+
+      if (!action.user) {
+        return {
+          kind: 'failure' as const,
+          error: 'Authentication failed'
+        };
+      }
+
+      return {
+        kind: 'success' as const,
+        user: action.user
+      };
+    })
+  );
+}