Fix email will not sent to white-label users

White label partners reported that the users are receiving edX
welcome emails at the time of signup.To solve it, a check is added
that will assure, only edX users will receive the welcome email.

LEARNER-1466

changes requested

update

update

updated

lms/djangoapps/email_marketing/tasks.py

@@ -95,7 +95,7 @@ def update_user(self, sailthru_vars, email, site=None, new_user=False):
         return
 
     # if new user, send welcome email
-    if new_user and email_config.sailthru_welcome_template:
+    if new_user and email_config.sailthru_welcome_template and is_default_site(site):
         scheduled_datetime = datetime.utcnow() + timedelta(seconds=email_config.welcome_email_send_delay)
         try:
             sailthru_response = sailthru_client.api_post(
@@ -120,6 +120,17 @@ def update_user(self, sailthru_vars, email, site=None, new_user=False):
                                  max_retries=email_config.sailthru_max_retries)
 
 
+def is_default_site(site):
+    """
+    Checks whether the site is a default site or a white-label
+    Args:
+        site: A dict containing the site info
+    Returns:
+         Boolean
+    """
+    return not site or site.get('id') == settings.SITE_ID
+
+
 # pylint: disable=not-callable
 @task(bind=True, default_retry_delay=3600, max_retries=24)
 def update_user_email(self, new_email, old_email):
@@ -184,7 +195,7 @@ def _get_or_create_user_list_for_site(sailthru_client, site=None, default_list_n
     :param: default_list_name
     :return: list name if exists or created else return None
     """
-    if site and site.get('id') != settings.SITE_ID:
+    if not is_default_site(site):
         list_name = site.get('domain', '').replace(".", "_") + "_user_list"
     else:
         list_name = default_list_name

lms/djangoapps/email_marketing/tests/test_signals.py

@@ -191,6 +191,23 @@ class EmailMarketingTests(TestCase):
         self.assertEquals(userparms['template'], "Welcome")
         self.assertEquals(userparms['schedule_time'], expected_schedule.strftime('%Y-%m-%dT%H:%M:%SZ'))
 
+    @patch('email_marketing.tasks.log.error')
+    @patch('email_marketing.tasks.SailthruClient.api_post')
+    @patch('email_marketing.tasks.SailthruClient.api_get')
+    def test_email_not_sent_to_white_label(self, mock_sailthru_get, mock_sailthru_post, mock_log_error):
+        """
+        tests that welcome email is not sent to the white-label site learner
+        """
+        white_label_site = Site.objects.create(domain='testwhitelabel.com', name='White Label')
+        site_dict = {'id': white_label_site.id, 'domain': white_label_site.domain, 'name': white_label_site.name}
+        mock_sailthru_post.return_value = SailthruResponse(JsonResponse({'ok': True}))
+        mock_sailthru_get.return_value = SailthruResponse(JsonResponse({'lists': [{'name': 'new list'}], 'ok': True}))
+        update_user.delay(
+            {'gender': 'm', 'username': 'test', 'activated': 1}, TEST_EMAIL, site_dict, new_user=True
+        )
+        self.assertFalse(mock_log_error.called)
+        self.assertNotEqual(mock_sailthru_post.call_args[0][0], "send")
+
     @patch('email_marketing.tasks.SailthruClient.api_post')
     @patch('email_marketing.tasks.SailthruClient.api_get')
     def test_add_user_list_existing_domain(self, mock_sailthru_get, mock_sailthru_post):