Merged PR 2001: fix(auth): handle empty user state on login

fix(auth): handle empty user state on login

Resolves error when user state is empty during login process.

Refs #5431

Related work items: #5431

libs/core/storage/src/lib/storage-providers/user.storage-provider.ts

@@ -1,15 +1,34 @@
 import { inject, Injectable } from '@angular/core';
 import { toObservable } from '@angular/core/rxjs-interop';
 import { StorageProvider } from './storage-provider';
-import { UserStateService } from '@generated/swagger/isa-api';
-import { filter, firstValueFrom, retry, switchMap, tap, timer } from 'rxjs';
+import {
+  ResponseArgsOfUserState,
+  UserStateService,
+} from '@generated/swagger/isa-api';
+import {
+  catchError,
+  filter,
+  firstValueFrom,
+  retry,
+  switchMap,
+  tap,
+  throwError,
+  timer,
+} from 'rxjs';
 import { USER_SUB } from '../tokens';
 import { Debounce, ValidateParam } from '@isa/common/decorators';
 import z from 'zod';
 import { logger } from '@isa/core/logging';
+import { HttpErrorResponse } from '@angular/common/http';
 
 type UserState = Record<string, unknown>;
 
+const DEFAULT_USER_STATE_RESPONSE: ResponseArgsOfUserState = {
+  result: { content: '{}' },
+  error: false,
+  message: 'User state not found',
+};
+
 @Injectable({ providedIn: 'root' })
 export class UserStorageProvider implements StorageProvider {
   #logger = logger(() => ({
@@ -22,6 +41,12 @@ export class UserStorageProvider implements StorageProvider {
     filter((sub) => sub !== 'anonymous'),
     switchMap(() =>
       this.#userStateService.UserStateGetUserState().pipe(
+        catchError((error) => {
+          if (error instanceof HttpErrorResponse && error.status === 404) {
+            return [DEFAULT_USER_STATE_RESPONSE];
+          }
+          return throwError(() => error);
+        }),
         retry({
           count: 3,
           delay: (error, retryCount) => {