Made needed changes for adapter architecture + added HealthCheckableRequestClient that checks service health before sending request

src/oauth/OAuthApp.ts

@@ -3,12 +3,14 @@ import axios from 'axios';
 import { Scopes } from '@BridgemanAccessible/ba-auth';
 import Client from '@BridgemanAccessible/ba-auth/client';
 import type { OnAuthCallback } from '@BridgemanAccessible/ba-auth/client';
+import { BaseKeystore } from '@BridgemanAccessible/ba-auth_keystore';
 import { logMessage, LogLevel } from '@BridgemanAccessible/ba-logging';
 
 import { App } from '../App.js';
 import { Initializer } from '../Initializer.js';
 
 import { getValueFromEnvironmentVariable } from '../utils/env-vars.js';
+import { HealthCheckableRequestClient } from '../utils/HealthCheckableRequestClient.js';
 
 import type { BridgemanAccessibleAppClaims } from './types/BridgemanAccessibleAppClaims.js';
 
@@ -101,6 +103,7 @@ type OAuthAppOptions<T extends BridgemanAccessibleAppClaims> = T & BasicOAuthApp
 export class OAuthApp<TCustomClaims extends BridgemanAccessibleAppClaims> extends App {
     private onAuth: OnAuthCallback;
     private saveSecret: (secret: string) => void | Promise<void>;
+    private getAccessToken: () => Promise<string>;
 
     private options: OAuthAppOptions<TCustomClaims>;
 
@@ -153,11 +156,13 @@ export class OAuthApp<TCustomClaims extends BridgemanAccessibleAppClaims> extend
     constructor(
         onAuth: OnAuthCallback, 
         saveSecret: (secret: string) => void | Promise<void>, 
+        getAccessToken: () => Promise<string>,
         options?: OAuthAppOptions<TCustomClaims>
     ) {
         super();
         this.onAuth = onAuth;
         this.saveSecret = saveSecret;
+        this.getAccessToken = getAccessToken;
         this.options = options ?? {} as OAuthAppOptions<TCustomClaims>;
     }
 
@@ -192,13 +197,14 @@ export class OAuthApp<TCustomClaims extends BridgemanAccessibleAppClaims> extend
         // Because we need this for registration to work properly. It make sense to put it here
         app.getInitializer()
             .getRouter()
-            .addOutsideFrameworkRoute('/.well-known/jwks.json');
+            .addOutsideFrameworkRoute(BaseKeystore.WELL_KNOWN_URI);
 
         this.client = await Client.setup<TCustomClaims>(
             app.getExpressApp(), 
             baseAppUrl, 
             this.onAuth, 
             this.saveSecret, 
+            this.getAccessToken,
             {
                 client_abbreviation: appAbbrv,
                 subscription_required: this.options.subscription_required ?? false,
@@ -237,8 +243,9 @@ export class OAuthApp<TCustomClaims extends BridgemanAccessibleAppClaims> extend
                 logMessage(`Waiting for OAuth client to become active... (waited ${j > 0 ? 60 /* 1 minute */ * (5 ** (j - 1)) / 60 : 0} minutes so far). Now waiting for ${60 /* 1 minute */ * (5 ** (j)) / 60} minutes...`, LogLevel.WARN);
                 await new Promise(resolve => setTimeout(resolve, 1000 /* 1 second */ * 60 /* 1 minute */ + 1000 /* 1 second */ * 60 /* 1 minute */ * (5 ** j) /* Exponential backoff */));
 
-                await axios.get(
-                    `https://account.bridgemanaccessible.ca/api/v1/apps/${encodeURIComponent(baseAppUrl.toString())}/status`,
+                await (new HealthCheckableRequestClient('Authorization Server')).makeRequest(
+                    new URL(`https://account.bridgemanaccessible.ca/api/v1/apps/${encodeURIComponent(baseAppUrl.toString())}/status`),
+                    'GET',
                     {
                         headers: {
                             Accept: 'application/json'