feat: auto-subscribe task creator to their own task

Fixes #2692

pkg/models/tasks.go

@@ -992,6 +992,17 @@ func createTask(s *xorm.Session, t *Task, a web.Auth, updateAssignees bool, setB
 
 	t.CreatedBy = createdBy
 
+	// Auto-subscribe the creator to the task so they receive
+	// notifications on comments and changes.
+	sub := &Subscription{
+		UserID:     createdBy.ID,
+		EntityType: SubscriptionEntityTask,
+		EntityID:   t.ID,
+	}
+	if err := sub.Create(s, a); err != nil && !IsErrSubscriptionAlreadyExists(err) {
+		return err
+	}
+
 	// Update the assignees
 	if updateAssignees {
 		if err := t.updateTaskAssignees(s, t.Assignees, a); err != nil {

pkg/models/tasks_test.go

@@ -69,6 +69,12 @@ func TestTask_Create(t *testing.T) {
 			"task_id":   task.ID,
 			"bucket_id": 1,
 		}, false)
+		// Assert the creator is auto-subscribed to the task
+		db.AssertExists(t, "subscriptions", map[string]interface{}{
+			"user_id":     usr.ID,
+			"entity_type": SubscriptionEntityTask,
+			"entity_id":   task.ID,
+		}, false)
 
 		events.DispatchPending(s)
 		events.AssertDispatched(t, &TaskCreatedEvent{})