Moved the last-seen-at-updater to use the publication timezone

refs https://github.com/TryGhost/Team/issues/1306

- This removes the limitation described in commit ff46449ad6
- The only edge case is that when a publication changes their timezone, it will have maximum 24 hours where the member last_seen_at could be incorrect

ghost/members-events-service/lib/last-seen-at-updater.js

@@ -1,6 +1,6 @@
 const DomainEvents = require('@tryghost/domain-events');
 const {MemberPageViewEvent} = require('@tryghost/member-events');
-const moment = require('moment');
+const moment = require('moment-timezone');
 
 /**
  * Listen for `MemberViewEvent` to update the `member.last_seen_at` timestamp
@@ -9,10 +9,21 @@ class LastSeenAtUpdater {
     /**
      * Initializes the event subscriber
      * @param {Object} deps dependencies
-     * @param {any} deps.memberModel The member model
+     * @param {Object} deps.models The list of model dependencies
+     * @param {any} deps.models.Member The Member model
+     * @param {Object} deps.services The list of service dependencies
+     * @param {any} deps.services.settingsCache The settings service
      */
-    constructor({memberModel}) {
-        this._memberModel = memberModel;
+    constructor({
+        models: {
+            Member
+        },
+        services: {
+            settingsCache
+        }
+    }) {
+        this._memberModel = Member;
+        this._settingsCacheService = settingsCache;
         DomainEvents.subscribe(MemberPageViewEvent, async (event) => {
             await this.updateLastSeenAt(event.data.memberId, event.data.memberLastSeenAt, event.timestamp);
         });
@@ -28,7 +39,8 @@ class LastSeenAtUpdater {
      * @param {Date} timestamp The event timestamp
      */
     async updateLastSeenAt(memberId, memberLastSeenAt, timestamp) {
-        if (memberLastSeenAt === null || moment(moment.utc(timestamp).startOf('day')).isAfter(moment.utc(memberLastSeenAt).startOf('day'))) {
+        const timezone = this._settingsCacheService.get('timezone');
+        if (memberLastSeenAt === null || moment(moment.utc(timestamp).tz(timezone).startOf('day')).isAfter(moment.utc(memberLastSeenAt).tz(timezone).startOf('day'))) {
             await this._memberModel.update({
                 last_seen_at: moment.utc(timestamp).format('YYYY-MM-DD HH:mm:ss')
             }, {

ghost/members-events-service/package.json

@@ -27,6 +27,6 @@
   "dependencies": {
     "@tryghost/domain-events": "^0.1.7",
     "@tryghost/member-events": "^0.3.5",
-    "moment": "^2.29.1"
+    "moment-timezone": "^0.5.34"
   }
 }

ghost/members-events-service/test/last-seen-at-updater.test.js

@@ -14,9 +14,63 @@ describe('LastSeenAtUpdater', function () {
         const now = moment('2022-02-28T18:00:00Z').utc();
         const previousLastSeen = moment('2022-02-27T23:00:00Z').toISOString();
         const spy = sinon.spy();
+        const settingsCache = sinon.stub().returns('Etc/UTC');
         new LastSeenAtUpdater({
-            memberModel: {
-                update: spy
+            models: {
+                Member: {
+                    update: spy
+                }
+            },
+            services: {
+                settingsCache: {
+                    get: settingsCache
+                }
+            }
+        });
+        DomainEvents.dispatch(MemberPageViewEvent.create({memberId: '1', memberLastSeenAt: previousLastSeen, url: '/'}, now.toDate()));
+        assert(spy.calledOnceWithExactly({
+            last_seen_at: now.format('YYYY-MM-DD HH:mm:ss')
+        }, {
+            id: '1'
+        }), 'The LastSeenAtUpdater should attempt a member update with the current date.');
+    });
+
+    it('works correctly on another timezone (not updating last_seen_at)', async function () {
+        const now = moment('2022-02-28T04:00:00Z').utc();
+        const previousLastSeen = moment('2022-02-27T20:00:00Z').toISOString();
+        const spy = sinon.spy();
+        const settingsCache = sinon.stub().returns('Asia/Bangkok');
+        new LastSeenAtUpdater({
+            models: {
+                Member: {
+                    update: spy
+                }
+            },
+            services: {
+                settingsCache: {
+                    get: settingsCache
+                }
+            }
+        });
+        DomainEvents.dispatch(MemberPageViewEvent.create({memberId: '1', memberLastSeenAt: previousLastSeen, url: '/'}, now.toDate()));
+        assert(spy.notCalled, 'The LastSeenAtUpdater should attempt a member update when the new timestamp is within the same day in the publication timezone.');
+    });
+
+    it('works correctly on another timezone (updating last_seen_at)', async function () {
+        const now = moment('2022-02-28T04:00:00Z').utc();
+        const previousLastSeen = moment('2022-02-27T20:00:00Z').toISOString();
+        const spy = sinon.spy();
+        const settingsCache = sinon.stub().returns('Europe/Paris');
+        new LastSeenAtUpdater({
+            models: {
+                Member: {
+                    update: spy
+                }
+            },
+            services: {
+                settingsCache: {
+                    get: settingsCache
+                }
             }
         });
         DomainEvents.dispatch(MemberPageViewEvent.create({memberId: '1', memberLastSeenAt: previousLastSeen, url: '/'}, now.toDate()));
@@ -31,9 +85,17 @@ describe('LastSeenAtUpdater', function () {
         const now = moment('2022-02-28T18:00:00Z');
         const previousLastSeen = moment('2022-02-28T00:00:00Z').toISOString();
         const spy = sinon.spy();
+        const settingsCache = sinon.stub().returns('Etc/UTC');
         new LastSeenAtUpdater({
-            memberModel: {
-                update: spy
+            models: {
+                Member: {
+                    update: spy
+                }
+            },
+            services: {
+                settingsCache: {
+                    get: settingsCache
+                }
             }
         });
         DomainEvents.dispatch(MemberPageViewEvent.create({memberId: '1', memberLastSeenAt: previousLastSeen, url: '/'}, now.toDate()));
@@ -43,9 +105,17 @@ describe('LastSeenAtUpdater', function () {
     it('Doesn\'t fire on other events', async function () {
         const now = moment('2022-02-28T18:00:00Z');
         const spy = sinon.spy();
+        const settingsCache = sinon.stub().returns('Etc/UTC');
         new LastSeenAtUpdater({
-            memberModel: {
-                update: spy
+            models: {
+                Member: {
+                    update: spy
+                }
+            },
+            services: {
+                settingsCache: {
+                    get: settingsCache
+                }
             }
         });
         DomainEvents.dispatch(MemberSubscribeEvent.create({memberId: '1', source: 'api'}, now.toDate()));