[AAE-10556] Admin with HxP - In case the roles API call fails the app crashes (#7895)

* [AAE-10556] Admin with HxP - In case the roles API call fails the app crashes

* Added tests for API error

lib/core/src/lib/services/user-access.service.spec.ts

@@ -20,7 +20,7 @@ import { TestBed } from '@angular/core/testing';
 import { UserAccessService } from './user-access.service';
 import { JwtHelperService } from './jwt-helper.service';
 import { OAuth2Service } from './oauth2.service';
-import { of } from 'rxjs';
+import { of, throwError } from 'rxjs';
 import { userAccessMock } from '../mock/user-access.mock';
 import { AppConfigService } from '../app-config';
 
@@ -161,5 +161,12 @@ describe('UserAccessService', () => {
 
             expect(getAccessFromApiSpy).not.toHaveBeenCalled();
         });
+
+        it('should set empty access list on fething roles error', async () => {
+            getAccessFromApiSpy.and.returnValue(throwError({ status: 503 }));
+            await userAccessService.fetchUserAccess();
+
+            expect(userAccessService.hasGlobalAccess(['MOCKED_ROLES'])).toBe(false);
+        });
     });
 });

lib/core/src/lib/services/user-access.service.ts

@@ -21,6 +21,8 @@ import { ApplicationAccessModel } from '../models/application-access.model';
 import { UserAccessModel } from '../models/user-access.model';
 import { AppConfigService } from '../app-config/app-config.service';
 import { OAuth2Service } from './oauth2.service';
+import { catchError } from 'rxjs/operators';
+import { of } from 'rxjs';
 
 const IDENTITY_MICRO_SERVICE_INGRESS = 'identity-adapter-service';
 
@@ -54,6 +56,14 @@ export class UserAccessService {
     private async fetchAccessFromApi() {
         const url = `${this.identityHost}/${IDENTITY_MICRO_SERVICE_INGRESS}/v1/roles`;
         await this.oAuth2Service.get({ url })
+            .pipe(
+                catchError(() => of({
+                    globalAccess: {
+                        roles: []
+                    },
+                    applicationAccess: []
+                }))
+            )
             .toPromise()
             .then((response: UserAccessModel) => {
                 this.globalAccess = response.globalAccess.roles;