feat(logout): postLogoutRedirectUri should not default to redirectUri

Author: reda-alaoui

projects/lib/src/auth.config.ts

@@ -15,6 +15,12 @@ export class AuthConfig {
    */
   public postLogoutRedirectUri? = '';
 
+  /**
+   * Defines whether to use 'redirectUri' as a replacement
+   * of 'postLogoutRedirectUri' if the latter is not set.
+   */
+  public redirectUriAsPostLogoutRedirectUriFallback? = true;
+
   /**
    * The auth server's endpoint that allows to log
    * the user in when using implicit flow.

projects/lib/src/oauth-service.ts

@@ -2380,7 +2380,7 @@ export class OAuthService extends AuthConfig implements OnDestroy {
         params = params.set('id_token_hint', id_token);
       }
 
-      const postLogoutUrl = this.postLogoutRedirectUri || this.redirectUri;
+      const postLogoutUrl = this.postLogoutRedirectUri || (this.redirectUriAsPostLogoutRedirectUriFallback && this.redirectUri || '');
       if (postLogoutUrl) {
         params = params.set('post_logout_redirect_uri', postLogoutUrl);