auth-guard.service.ts from version 7.3.0 of ngrx/platform

auth-guard.service.ts

// NgRx v7.3.0
@Injectable({
  providedIn: 'root',
})
export class AuthGuard implements CanActivate {
  constructor(private store: Store<fromAuth.State>) {}

  canActivate(): Observable<boolean> {
    return this.store.pipe(
      select(fromAuth.getLoggedIn),
      map(authed => {
        if (!authed) {
          this.store.dispatch(new AuthApiActions.LoginRedirect());
          return false;
        }

        return true;
      }),
      take(1)
    );
  }
}