[accelerator] refresh auth state when logging out

frontend/src/app/services/auth.service.ts

@@ -0,0 +1,71 @@
+import { Injectable } from '@angular/core';
+import { Router } from '@angular/router';
+import { map, Observable, ReplaySubject, switchMap, tap } from 'rxjs';
+import { ServicesApiServices } from './services-api.service';
+
+export interface IAuth {
+  token: string;
+  user: {
+    userId: number;
+    username: string;
+  }
+}
+
+@Injectable({
+  providedIn: 'root'
+})
+export class AuthServiceMempool {
+  private auth$: ReplaySubject<IAuth | null> = new ReplaySubject(1);
+
+  constructor(
+    private servicesApiService: ServicesApiServices,
+    private router: Router,
+  ) {
+    const localStorageAuth = localStorage.getItem('auth');
+    if (!localStorageAuth || localStorageAuth.length === 0) {
+      this.setAuth(null);
+    } else {
+      try {
+        this.setAuth(JSON.parse(localStorageAuth));
+      } catch (e) {
+        console.error(`Unable to parse 'auth' from localStorage`, e);
+        localStorage.removeItem('auth');
+        this.setAuth(null);
+      }
+    }
+  }
+
+  refreshAuth$(): Observable<IAuth | null> {
+    return this.servicesApiService.getJWT$()
+      .pipe(
+        tap((user) => {
+          this.setAuth(user);
+        }),
+        map((user) => {
+          return user;
+        })
+      );
+  }
+
+  logout() {
+    this.setAuth(null);
+  }
+
+  setAuth(auth: any) {
+    if (!auth) {
+      localStorage.removeItem('auth');
+    } else {
+      localStorage.setItem('auth', JSON.stringify(auth));
+    }
+    this.auth$.next(auth);
+  }
+
+  getAuth$(): Observable<IAuth | null> {
+    if (!localStorage.getItem('auth')) {
+      return this.refreshAuth$().pipe(
+        switchMap(() => this.auth$.asObservable())
+      );
+    }
+    return this.auth$.asObservable();
+  }
+}

frontend/src/app/services/services-api.service.ts

@@ -120,6 +120,10 @@ export class ServicesApiServices {
     return this.httpClient.post(`${SERVICES_API_PREFIX}/auth/logout`, {});
   }
 
+  getJWT$() {
+    return this.httpClient.get<any>(`${SERVICES_API_PREFIX}/auth/getJWT`);
+  }
+
   getServicesBackendInfo$(): Observable<IBackendInfo> {
     return this.httpClient.get<IBackendInfo>(`${SERVICES_API_PREFIX}/version`);
   }