Configure keycloak (#4)

Co-authored-by: Phan Huy Tran <p.tran@neusta.de>
Reviewed-on: #4
Co-authored-by: ptran <huydw@proton.me>
Co-committed-by: ptran <huydw@proton.me>

src/app/app.config.ts

@@ -1,10 +1,50 @@
-import { ApplicationConfig } from '@angular/core';
-import { provideRouter } from '@angular/router';
+import {APP_INITIALIZER, ApplicationConfig} from '@angular/core';
+import {provideRouter} from '@angular/router';
+import {KeycloakAngularModule, KeycloakBearerInterceptor, KeycloakService} from "keycloak-angular";
+import {routes} from './app.routes';
+import {HTTP_INTERCEPTORS, provideHttpClient, withInterceptorsFromDi} from "@angular/common/http";
+import {provideAnimationsAsync} from '@angular/platform-browser/animations/async';
 
-import { routes } from './app.routes';
-import {provideHttpClient, withInterceptorsFromDi} from "@angular/common/http";
-import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
+export const initializeKeycloak = (keycloak: KeycloakService) => async () =>
+  keycloak.init({
+    config: {
+      url: 'https://keycloak.szut.dev/auth',
+      realm: 'szut',
+      clientId: 'employee-management-service-frontend',
+    },
+    loadUserProfileAtStartUp: true,
+    initOptions: {
+      onLoad: 'check-sso',
+      silentCheckSsoRedirectUri:
+        window.location.origin + '/silent-check-sso.html',
+      checkLoginIframe: false,
+      redirectUri: 'http://localhost:4200',
+    },
+  });
+
+
+function initializeApp(keycloak: KeycloakService): () => Promise<boolean> {
+  return () => initializeKeycloak(keycloak)();
+}
 
 export const appConfig: ApplicationConfig = {
-  providers: [provideRouter(routes), provideHttpClient(withInterceptorsFromDi()), provideAnimationsAsync()]
+  providers: [
+    provideRouter(routes),
+    provideHttpClient(withInterceptorsFromDi()),
+    provideAnimationsAsync(),
+    KeycloakAngularModule,
+    {
+      provide: APP_INITIALIZER,
+      useFactory: initializeApp,
+      multi: true,
+      deps: [KeycloakService]
+    },
+    KeycloakService,
+    provideHttpClient(withInterceptorsFromDi()),
+    {
+      provide: HTTP_INTERCEPTORS,
+      useClass: KeycloakBearerInterceptor,
+      multi: true
+    }
+  ]
 };