core: do a healthcheck before logging out user on session revoke

packages/core/api/healthcheck.js

@@ -0,0 +1,31 @@
+/*
+This file is part of the Notesnook project (https://notesnook.com/)
+
+Copyright (C) 2023 Streetwriters (Private) Limited
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+import hosts from "../utils/constants";
+import http from "../utils/http";
+
+export class HealthCheck {
+  static async isAuthServerHealthy() {
+    try {
+      const response = await http.get(`${hosts.AUTH_HOST}/health`);
+      return response.trim() === "Healthy";
+    } catch {
+      return false;
+    }
+  }
+}

packages/core/api/user-manager.js

@@ -22,6 +22,7 @@ import http from "../utils/http";
 import constants from "../utils/constants";
 import TokenManager from "./token-manager";
 import { EV, EVENTS } from "../common";
+import { HealthCheck } from "./healthcheck";
 
 const ENDPOINTS = {
   signup: "/users",
@@ -48,14 +49,20 @@ class UserManager {
     this.tokenManager = new TokenManager(storage);
 
     EV.subscribe(EVENTS.userUnauthorized, async (url) => {
-      if (url.includes("/connect/token")) return;
+      if (
+        url.includes("/connect/token") ||
+        !(await HealthCheck.isAuthServerHealthy())
+      )
+        return;
       try {
         await this.tokenManager._refreshToken(true);
       } catch (e) {
-        await this.logout(
+        if (e.message === "invalid_grant" || e.message === "invalid_client") {
-          false,
+          await this.logout(
-          `Your token has been revoked. Error: ${e.message}.`
+            false,
-        );
+            `Your token has been revoked. Error: ${e.message}.`
+          );
+        }
       }
     });
   }