Cache Webex group list in-process + fix log typo

The /user/groups/find endpoint used to hit Webex on every request,
paginating through ~10k groups 500 at a time (roughly 20 sequential
round trips per compose-page load). Now the whole list lives in a
process-local cache that refreshes on startup and once a day at 03:00
CRON_TIMEZONE.

- New groupsCache = { data, lastRefreshed, refreshing }. refreshing is
  a shared in-flight Promise so a startup refresh and the daily cron
  can't stampede if their timing overlaps.
- refreshGroupsCache() wraps findWebexGroup() with load timing +
  error logging.
- getGroupsFromCache() returns the cached list immediately; only the
  very first request after startup waits (and only if the startup
  refresh hasn't completed yet).
- Warm the cache in the background right after loadBotProfiles() in
  the app.listen callback.
- Third cron ('0 0 3 * * *') refreshes the cache daily, offset from
  the 01:10 jobs cleanup and per-minute token/scheduled-jobs tick so
  they don't fight for the event loop.

Bug fixes rolled in while I was in findWebexGroup:
- Return reject(...) on a non-ok Webex response instead of also
  continuing the while loop, which used to race resolve/reject.
- Return reject(error) from the try/catch so a Webex hiccup no longer
  hangs the paginator forever; previously it caught+logged and let
  the loop spin.
- Drop the stray `memberSize = 0` assignment (memberSize was never
  declared in scope).
- Drop the per-page console.log noise; failures now go through the
  timestamped logger under the findWebexGroup tag.

Route cleanup:
- /user/groups/find now serves getGroupsFromCache() and returns 502
  with a logged reason if the cache is empty AND the refresh failed.
- Dropped the stray saveConfig(response, "./testData.json") that
  used to persist the entire fetched group list to a scratch file on
  every request.

Also: fix "identify" -> "identity" in the whoAmI startup log line.
Co-authored-by: Cursor <cursoragent@cursor.com>

index.js

@@ -100,6 +100,50 @@ function getBotProfile(appName) {
     return botProfiles[appName] || null;
 }
 
+// Cached list of every Webex group in the org, used by the "Additional groups"
+// dropdown on the compose page. findWebexGroup() paginates through ~10k groups
+// 500 at a time, which used to run on every /user/groups/find request; we now
+// refresh once at startup and once a day and serve everything else from
+// memory. `refreshing` is a shared in-flight Promise so a concurrent refresh
+// (e.g. the cron firing during a slow startup fetch) can't stampede.
+var groupsCache = {
+    data: null,
+    lastRefreshed: null,
+    refreshing: null,
+};
+
+function refreshGroupsCache() {
+    if (groupsCache.refreshing) return groupsCache.refreshing;
+    var startedAt = Date.now();
+    logger('groupsCache', 'Refreshing group list from Webex...');
+    groupsCache.refreshing = findWebexGroup()
+        .then(function (groups) {
+            groupsCache.data = groups;
+            groupsCache.lastRefreshed = new Date();
+            logger('groupsCache',
+                'Cached ' + groups.length + ' groups in ' +
+                (Date.now() - startedAt) + 'ms.');
+            return groups;
+        })
+        .catch(function (err) {
+            logger('groupsCache', 'Refresh failed: ' + (err && err.message || err));
+            throw err;
+        })
+        .finally(function () {
+            groupsCache.refreshing = null;
+        });
+    return groupsCache.refreshing;
+}
+
+// Returns the cached groups if we have any; otherwise waits for whatever
+// refresh is currently in flight (or kicks one off). Requests only ever block
+// on the very first call after startup — every subsequent call resolves
+// synchronously from memory.
+function getGroupsFromCache() {
+    if (groupsCache.data) return Promise.resolve(groupsCache.data);
+    return refreshGroupsCache();
+}
+
 // Express middleware: 404s any /CollabCentral/:app/* request whose `:app` is
 // not a known + enabled bot. Attaches the bot config to req.botConfig for
 // downstream handlers.
@@ -180,6 +224,10 @@ var server = app.listen(serverPort, function () {
     loadBotProfiles()
         .then(() => logger("startup", "Loaded " + Object.keys(botProfiles).length + " bot profile(s)."))
         .catch(err => logger("startup", "loadBotProfiles error: " + (err && err.message || err)));
+    // Warm the groups cache in the background so the very first user hitting
+    // /user/groups/find gets an instant response. Failures are non-fatal:
+    // getGroupsFromCache() will simply try again on the first request.
+    refreshGroupsCache().catch(function () { /* logged inside */ });
 });
 server.setTimeout(3000000);
 const upload = multer({ limits: { fileSize: 4000000 } }).fields(
@@ -222,6 +270,12 @@ cron.schedule('0 * * * * *', () => {
         .catch(error => logger("checkScheduledJobs", error));
 }, { timezone: cronTimezone })
 
+// Daily at 03:00 local time: rebuild the org-wide groups cache. Offset from
+// the 01:10 jobs cleanup so the two crons don't fight over the event loop.
+cron.schedule('0 0 3 * * *', function () {
+    refreshGroupsCache().catch(function () { /* logged inside */ });
+}, { timezone: cronTimezone })
+
 //Routes to be used
 // Validate the :app segment for every /CollabCentral/:app/* request. This
 // runs before the static mount and all the per-route handlers below, so any
@@ -401,15 +455,13 @@ app.get('/CollabCentral/:app/user/:scope/:action', (req, res) => {
                 res.status(200).send(config.webex.bot[req.params.app].authorized[req.cookies.id].groups)
             } else if (req.params.action == "find") {
                 logger("apiEndpoint(" + req.params.app + ")", "GET /user/groups/find");
-
+                getGroupsFromCache()
-                findWebexGroup()
+                    .then(function (groups) { res.status(200).send(groups); })
-                    .then(response => {
+                    .catch(function (err) {
-                        //console.log(response)
+                        logger('apiEndpoint(' + req.params.app + ')',
-                        saveConfig(response, "./testData.json")
+                            'groups/find failed: ' + (err && err.message || err));
-
+                        res.status(502).send('Failed to load groups from Webex.');
-                        res.status(200).send(response);
+                    });
-                    })
-
             }
         } else { res.status(404) }
     } else { res.status(401) }
@@ -673,38 +725,32 @@ function findWebexGroup() {
                 'Content-Type': `application/json`
             }
         };
-        console.log(url)
         while (groupSize > groups.length) {
-            console.log("groupSize: " + groupSize)
-            console.log("groups.length: " + groups.length)
             try {
-                console.log(url);
+                var fetchedGroups = await fetchWithRateLimit(url, requestOptions);
-                var fetchedGroups = await fetchWithRateLimit(url, requestOptions)
                 if (fetchedGroups.ok) {
                     var groupData = await fetchedGroups.json();
-                    console.log("Total Results: " + groupData.totalResults)
                     groupSize = groupData.totalResults;
                     for (var group of groupData.groups) {
                         groups.push(group);
                     }
                     startIndex = startIndex + count;
                     url.searchParams.delete("startIndex");
-                    url.searchParams.append("startIndex", startIndex)
+                    url.searchParams.append("startIndex", startIndex);
                 } else {
-                    memberSize = 0;
+                    return reject(fetchedGroups.status + ": " + fetchedGroups.statusText);
-                    reject(fetchedGroups.status + ": " + fetchedGroups.statusText);
                 }
             } catch (error) {
-                console.log("Error findGroupById: " + error);
+                logger('findWebexGroup', 'page fetch failed: ' + (error && error.message || error));
+                return reject(error);
             }
         }
-        console.log("Groups found: " + groups.length);
         resolve(groups);
     })
 }
 function whoAmI(bearerToken) {
     return new Promise(async function (resolve, reject) {
-        logger("whoAmI", "Person is having an existential crisis of identify.")
+        logger("whoAmI", "Person is having an existential crisis of identity.")
         var myHeaders = {
             "Authorization": "Bearer " + bearerToken,
             "Content-Type": "application/json"