Added prometheus metric

api/cloud_api/routes/Mailer.js

@@ -27,7 +27,11 @@ router.post('/sendVerificationEmail', async (req, res) => {
 
   if (tokenJson) {
     if (apiHandler.checkIfTokenIsExpired(tokenJson)) {
-      logger.warn('refreshing token');
+      // the time() function in prometheus returns the epoch time in seconds
+      // i.e. 1760310047.552
+      // Date.now() returns the time in milliseconds, so we divide by 1000
+      // to be consistent with prometheus.
+      MetricsHandler.gcpRefreshTokenLastUpdated.set(Math.floor(Date.now() / 1000));
       apiHandler.refreshToken();
     }
   } else {
@@ -69,6 +73,7 @@ router.post('/sendPasswordReset', async (req, res) => {
   if (tokenJson) {
     if (apiHandler.checkIfTokenIsExpired(tokenJson)) {
       logger.warn('refreshing token');
+      MetricsHandler.gcpRefreshTokenLastUpdated.set(Math.floor(Date.now() / 1000));
       apiHandler.refreshToken();
     }
   } else {

api/cloud_api/util/SceGoogleApiHandler.js

@@ -80,7 +80,16 @@ class SceGoogleApiHandler {
    * DevOps purposes, false for API endpoints.
    */
   getNewToken(isDevScript) {
-    if (!isDevScript) return;
+    if (!isDevScript) {
+      logger.warn(`
+      The 'getNewToken' function was called outside of a development environment.
+      Token generation requires manual steps and interactive console input.
+      If you actually want to set this up, visit:
+      https://sce.sjsu.edu/s/gmailtoken
+      Interactive setup has been skipped.
+      `);
+      return;
+    }
 
     const authUrl = this.oAuth2Client.generateAuthUrl({
       /* eslint-disable-next-line */

api/util/metrics.js

@@ -63,6 +63,11 @@ class MetricsHandler {
     labelNames: ['endpointName']
   })
 
+  gcpRefreshTokenLastUpdated = new client.Gauge({
+    name: 'google_cloud_refresh_token_last_updated',
+    help: 'When the GCP refresh token needs to be refreshed, time written in eopch format'
+  })
+
   constructor() {
     register.setDefaultLabels({
       app: 'sce-core',

prometheus/prometheus.yml

@@ -17,6 +17,9 @@ scrape_configs:
   - job_name: 'clark'
     static_configs:
       - targets: ['main-endpoints:8080']
+  - job_name: 'clark-email'
+    static_configs:
+      - targets: ['sce-cloud-api:8082']
   # the below is for discord bot
   - job_name: 'sarah'
     static_configs: