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/*
* Copyright (c) 2022. Deutsche Telekom AG
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
*/
import { Injectable } from '@angular/core';
import { OAuthService, UserInfo } from 'angular-oauth2-oidc';
import { catchError, filter, map } from 'rxjs/operators';
import { NavigationStart, Router } from '@angular/router';
import { AlertService } from '../modules/alerting';
import { TranslateService } from '@ngx-translate/core';
import { BehaviorSubject, EMPTY, Observable, of } from 'rxjs';
/**
* Provides check for roles and token
*/
@Injectable({
providedIn: 'root',
})
export class AuthService {
userProfile$ = new BehaviorSubject<UserInfo | undefined>(undefined);
constructor(private readonly oauthService: OAuthService, private router: Router, private alertService: AlertService, private translateService: TranslateService) {
//renew cache every page reload
router.events.pipe(
filter((e): e is NavigationStart => e instanceof NavigationStart)
).subscribe(() => {
try {
return this.loadUserProfile().then(userInfo => this.userProfile$.next(userInfo)).catch(e => {throw e})
}catch (e) {
this.alertService.error(this.translateService.instant('common.messages.keycloakAccessTokenNotValid'), {id: "keycloak", keepAfterRouteChange: true})
return Promise.resolve(null);
}
});
}
userProfileCache: UserInfo | undefined = undefined;
/**
* Convenience method of `hasValidAccessToken()` and `hasSufficientRoles()`
* Asynchronous because the needed UserInfo is fetched from Keycloak
*/
hasPermissions(): Observable<boolean> {
if (this.hasValidAccessToken()) {
return this.hasSufficientRoles();
}
return of(false);
}
/**
* This answers: 'What if the user has an account, but without any permissions?'
* Asynchronous because the needed UserInfo is fetched from Keycloak
*/
hasSufficientRoles(): Observable<boolean> {
return this.loadCachedUserProfile().pipe(map(info => info?.roles.join(',') !== 'offline_access'));
}
loadCachedUserProfile(): Observable<UserInfo | undefined> {
return this.userProfile$.pipe(
filter(userProfile => userProfile !== undefined),
catchError(err => {
console.error(err);
return EMPTY
}));
}
/**
* Wrapper for `hasValidAccessToken` from OAuthService
*/
hasValidAccessToken(): boolean {
return this.oauthService.hasValidAccessToken();
}
/*
* Private method = should not be used outside of this class, because it triggers additional request for userprofile
* */
private loadUserProfile():Promise<UserInfo> {
// in version 12.2 loadUserProfile() Promise returns data of type object instead of UserInfo
//@ts-ignore
return this.oauthService.loadUserProfile().then(userInfo => userInfo.info as UserInfo)
}
}
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