update delivery receipts for countries that return them

some countries don't return delivery receipts
some countries return delivery receipts when they reach the carrier

these countries, we should keep the notifications in sent (aka
sent_internatinally) for. However, for countries that have normal
delivery receipts, we should update them as we do for UK numbers

app/dao/notifications_dao.py

@@ -8,6 +8,7 @@ from flask import current_app
 from werkzeug.datastructures import MultiDict
 from sqlalchemy import (desc, func, or_, and_, asc)
 from sqlalchemy.orm import joinedload
+from notifications_utils.international_billing_rates import INTERNATIONAL_BILLING_RATES
 
 from app import db, create_uuid
 from app.dao import days_ago
@@ -163,6 +164,10 @@ def _decide_permanent_temporary_failure(current_status, status):
     return status
 
 
+def country_records_delivery(phone_prefix):
+    return INTERNATIONAL_BILLING_RATES[phone_prefix]['attributes']['dlr'].lower() == 'yes'
+
+
 def _update_notification_status(notification, status):
     status = _decide_permanent_temporary_failure(current_status=notification.status, status=status)
     notification.status = status
@@ -182,7 +187,10 @@ def update_notification_status_by_id(notification_id, status):
             Notification.status == NOTIFICATION_SENT
         )).first()
 
-    if not notification or notification.status == NOTIFICATION_SENT:
+    if not notification:
+        return None
+
+    if notification.international and not country_records_delivery(notification.phone_prefix):
         return None
 
     return _update_notification_status(

tests/app/dao/test_notification_dao.py

@@ -15,6 +15,7 @@ from app.models import (
     NOTIFICATION_STATUS_TYPES,
     NOTIFICATION_STATUS_TYPES_FAILED,
     NOTIFICATION_SENT,
+    NOTIFICATION_DELIVERED,
     KEY_TYPE_NORMAL,
     KEY_TYPE_TEAM,
     KEY_TYPE_TEST)
@@ -353,28 +354,45 @@ def test_should_update_status_by_id_if_created(notify_db, notify_db_session):
     assert updated.status == 'failed'
 
 
-def test_should_not_update_status_by_reference_if_in_sent_status(notify_db, notify_db_session):
-    notification = sample_notification(
-        notify_db,
-        notify_db_session,
+def test_should_not_update_status_by_reference_if_from_country_with_no_delivery_receipts(sample_template):
+    notification = create_notification(
+        sample_template,
         status=NOTIFICATION_SENT,
         reference='foo'
     )
 
-    update_notification_status_by_reference('foo', 'failed')
-    assert Notification.query.get(notification.id).status == NOTIFICATION_SENT
+    res = update_notification_status_by_reference('foo', 'failed')
+
+    assert res is None
+    assert notification.status == NOTIFICATION_SENT
 
 
-def test_should_not_update_status_by_id_if_in_sent_status(notify_db, notify_db_session):
-    notification = sample_notification(
-        notify_db,
-        notify_db_session,
-        status=NOTIFICATION_SENT
+def test_should_not_update_status_by_id_if_sent_to_country_with_no_delivery_receipts(sample_template):
+    notification = create_notification(
+        sample_template,
+        status=NOTIFICATION_SENT,
+        international=True,
+        phone_prefix='1'  # americans only have carrier delivery receipts
     )
 
-    update_notification_status_by_id(notification.id, 'failed')
+    res = update_notification_status_by_id(notification.id, 'delivered')
 
-    assert Notification.query.get(notification.id).status == NOTIFICATION_SENT
+    assert res is None
+    assert notification.status == NOTIFICATION_SENT
+
+
+def test_should_not_update_status_by_id_if_sent_to_country_with_no_delivery_receipts(sample_template):
+    notification = create_notification(
+        sample_template,
+        status=NOTIFICATION_SENT,
+        international=True,
+        phone_prefix='7'  # russians have full delivery receipts
+    )
+
+    res = update_notification_status_by_id(notification.id, 'delivered')
+
+    assert res == notification
+    assert notification.status == NOTIFICATION_DELIVERED
 
 
 def test_should_not_update_status_by_reference_if_not_sending(notify_db, notify_db_session):