Merge pull request #681 from Hexastack/fix/subscriber-handove-event

fix: handover/handback lifecycle hook

api/src/chat/repositories/subscriber.repository.spec.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2024 Hexastack. All rights reserved.
+ * Copyright © 2025 Hexastack. All rights reserved.
  *
  * Licensed under the GNU Affero General Public License v3.0 (AGPLv3) with the following additional terms:
  * 1. The name "Hexabot" is a trademark of Hexastack. You may not use this name in derivative works without express written permission.
@@ -52,6 +52,7 @@ describe('SubscriberRepository', () => {
   let allSubscribers: Subscriber[];
   let allAttachments: Attachment[];
   let subscribersWithPopulatedFields: SubscriberFull[];
+  let eventEmitter: EventEmitter2;
 
   beforeAll(async () => {
     const module = await Test.createTestingModule({
@@ -94,6 +95,7 @@ describe('SubscriberRepository', () => {
         allUsers.find(({ id }) => subscriber.assignedTo === id) || null,
       avatar: allAttachments.find(({ id }) => subscriber.avatar === id) || null,
     }));
+    eventEmitter = module.get<EventEmitter2>(EventEmitter2);
   });
 
   afterEach(jest.clearAllMocks);
@@ -155,4 +157,73 @@ describe('SubscriberRepository', () => {
       );
     });
   });
+
+  describe('updateOne', () => {
+    it('should execute preUpdate hook and emit events on assignedTo change', async () => {
+      // Arrange: Set up a mock subscriber
+      const oldSubscriber = {
+        ...subscriberFixtures[0], // Mocked existing subscriber
+        assignedTo: null,
+      } as Subscriber;
+
+      const updates = { assignedTo: '9'.repeat(24) }; // Change assigned user;
+
+      jest
+        .spyOn(subscriberRepository, 'findOne')
+        .mockResolvedValue(oldSubscriber);
+      jest.spyOn(eventEmitter, 'emit');
+
+      await subscriberRepository.updateOne(oldSubscriber.id, updates);
+
+      expect(eventEmitter.emit).toHaveBeenNthCalledWith(
+        3,
+        'hook:subscriber:assign',
+        expect.anything(),
+        expect.anything(),
+      );
+      expect(eventEmitter.emit).toHaveBeenNthCalledWith(
+        4,
+        'hook:analytics:passation',
+        expect.anything(),
+        true, // Because assignedTo has changed
+      );
+    });
+
+    it('should not emit events if assignedTo remains unchanged', async () => {
+      const oldSubscriber = {
+        ...subscriberFixtures[0],
+        assignedTo: '8'.repeat(24),
+      } as Subscriber;
+
+      const updates = { assignedTo: '8'.repeat(24) }; // Same user;
+
+      jest
+        .spyOn(subscriberRepository, 'findOne')
+        .mockResolvedValue(oldSubscriber);
+      jest.spyOn(eventEmitter, 'emit');
+
+      await subscriberRepository.updateOne(oldSubscriber.id, updates);
+
+      expect(eventEmitter.emit).not.toHaveBeenCalledWith(
+        'hook:subscriber:assign',
+        expect.anything(),
+        expect.anything(),
+      );
+      expect(eventEmitter.emit).not.toHaveBeenCalledWith(
+        'hook:analytics:passation',
+        expect.anything(),
+        expect.anything(),
+      );
+    });
+
+    it('should throw an error if the subscriber does not exist', async () => {
+      jest.spyOn(subscriberRepository, 'findOne').mockResolvedValue(null);
+
+      await expect(
+        subscriberRepository.updateOne('0'.repeat(24), {
+          $set: { assignedTo: 'user-456' },
+        }),
+      ).rejects.toThrow();
+    });
+  });
 });

api/src/chat/repositories/subscriber.repository.ts

@@ -80,26 +80,29 @@ export class SubscriberRepository extends BaseRepository<
   ): Promise<void> {
     const subscriberUpdates: SubscriberUpdateDto = updates?.['$set'];
 
-    const oldSubscriber = await this.findOne(criteria);
+    if ('assignedTo' in subscriberUpdates) {
+      // In case of a handover or handback, emit events
+      const oldSubscriber = await this.findOne(criteria);
 
-    if (!oldSubscriber) {
-      throw new Error('Something went wrong: subscriber does not exist');
-    }
+      if (!oldSubscriber) {
+        throw new Error('Something went wrong: subscriber does not exist');
+      }
 
-    if (subscriberUpdates.assignedTo !== oldSubscriber?.assignedTo) {
-      this.eventEmitter.emit(
-        'hook:subscriber:assign',
-        subscriberUpdates,
-        oldSubscriber,
-      );
-
-      if (!(subscriberUpdates.assignedTo && oldSubscriber?.assignedTo)) {
+      if (subscriberUpdates.assignedTo !== oldSubscriber?.assignedTo) {
         this.eventEmitter.emit(
-          'hook:analytics:passation',
+          'hook:subscriber:assign',
+          subscriberUpdates,
           oldSubscriber,
-          !!subscriberUpdates?.assignedTo,
         );
-        subscriberUpdates.assignedAt = new Date();
+
+        if (!(subscriberUpdates.assignedTo && oldSubscriber?.assignedTo)) {
+          this.eventEmitter.emit(
+            'hook:analytics:passation',
+            oldSubscriber,
+            !!subscriberUpdates?.assignedTo,
+          );
+          subscriberUpdates.assignedAt = new Date();
+        }
       }
     }
   }