🐛 Fixed source tracking using cached value (#15778)

refs https://ghost.slack.com/archives/C02G9E68C/p1667834794676479

- When enabling tracking, it could be the case that the server is ignoring the attributions because of the cached setting value.
- When disabling tracking, the frontend should take care of not
collecting new tracking information to the server, but still the backend value should be used as a fail-safe.

ghost/core/core/server/services/member-attribution/index.js

@@ -40,7 +40,7 @@ class MemberAttributionServiceWrapper {
                 Integration: models.Integration
             },
             attributionBuilder: this.attributionBuilder,
-            isTrackingEnabled: !!settingsCache.get('members_track_sources')
+            getTrackingEnabled: () => !!settingsCache.get('members_track_sources')
         });
     }
 }

ghost/member-attribution/lib/service.js

@@ -5,15 +5,19 @@ class MemberAttributionService {
      *
      * @param {Object} deps
      * @param {Object} deps.attributionBuilder
-     * @param {boolean} deps.isTrackingEnabled
      * @param {Object} deps.models
      * @param {Object} deps.models.MemberCreatedEvent
      * @param {Object} deps.models.SubscriptionCreatedEvent
+     * @param {() => boolean} deps.getTrackingEnabled
      */
-    constructor({attributionBuilder, models, isTrackingEnabled}) {
+    constructor({attributionBuilder, models, getTrackingEnabled}) {
         this.models = models;
         this.attributionBuilder = attributionBuilder;
-        this.isTrackingEnabled = isTrackingEnabled;
+        this._getTrackingEnabled = getTrackingEnabled;
+    }
+
+    get isTrackingEnabled() {
+        return this._getTrackingEnabled();
     }
 
     /**

ghost/member-attribution/test/service.test.js

@@ -13,7 +13,7 @@ describe('MemberAttributionService', function () {
     describe('getAttributionFromContext', function () {
         it('returns null if no context is provided', async function () {
             const service = new MemberAttributionService({
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const attribution = await service.getAttributionFromContext();
 
@@ -31,7 +31,7 @@ describe('MemberAttributionService', function () {
 
         it('returns attribution for importer context', async function () {
             const service = new MemberAttributionService({
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const attribution = await service.getAttributionFromContext({importer: true});
 
@@ -40,7 +40,7 @@ describe('MemberAttributionService', function () {
 
         it('returns attribution for admin context', async function () {
             const service = new MemberAttributionService({
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const attribution = await service.getAttributionFromContext({user: 'abc'});
 
@@ -49,7 +49,7 @@ describe('MemberAttributionService', function () {
 
         it('returns attribution for api without integration context', async function () {
             const service = new MemberAttributionService({
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const attribution = await service.getAttributionFromContext({
                 api_key: 'abc'
@@ -69,7 +69,7 @@ describe('MemberAttributionService', function () {
                         }
                     }
                 },
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const attribution = await service.getAttributionFromContext({
                 api_key: 'abc',
@@ -96,7 +96,7 @@ describe('MemberAttributionService', function () {
                         };
                     }
                 },
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const model = {
                 id: 'event_id',
@@ -130,7 +130,7 @@ describe('MemberAttributionService', function () {
                         };
                     }
                 },
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const model = {
                 id: 'event_id',
@@ -170,7 +170,7 @@ describe('MemberAttributionService', function () {
                         };
                     }
                 },
-                isTrackingEnabled: true
+                getTrackingEnabled: () => true
             });
             const model = {
                 id: 'event_id',