Don't send notifications about past SSRs when turning on info notifications (#2783)

# What this PR does

Fixes a bug when a user is receiving push notifications about past SSRs
after turning on the info notifications in the mobile app.

## Checklist

- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Ignore ical cancelled events when calculating shifts ([#2776](https://github.com/grafana/oncall/pull/2776))
 - Fix Slack acknowledgment reminders by @vadimkerr ([#2769](https://github.com/grafana/oncall/pull/2769))
 - Fix issue with updating "Require resolution note" setting by @Ferril ([#2782](https://github.com/grafana/oncall/pull/2782))
+- Don't send notifications about past SSRs when turning on info notifications by @vadimkerr ([#2783](https://github.com/grafana/oncall/pull/2783))
 
 ## v1.3.23 (2023-08-10)
 

engine/apps/mobile_app/tasks.py

@@ -595,10 +595,10 @@ def _should_notify_user_about_shift_swap_request(
     except MobileAppUserSettings.DoesNotExist:
         return False  # don't notify if the app is not configured
 
-    return (
-        mobile_app_user_settings.info_notifications_enabled  # info notifications must be enabled
-        and user.is_in_working_hours(now, mobile_app_user_settings.time_zone)  # user must be in working hours
-        and not _has_user_been_notified_for_shift_swap_request(shift_swap_request, user)  # don't notify twice
+    return user.is_in_working_hours(  # user must be in working hours
+        now, mobile_app_user_settings.time_zone
+    ) and not _has_user_been_notified_for_shift_swap_request(  # don't notify twice
+        shift_swap_request, user
     )
 
 

engine/apps/mobile_app/tests/test_shift_swap_request.py

@@ -245,7 +245,7 @@ def test_notify_user_about_shift_swap_request(make_organization, make_user, make
     device_to_notify = FCMDevice.objects.create(user=benefactor, registration_id="test_device_id")
     MobileAppUserSettings.objects.create(user=benefactor, info_notifications_enabled=True)
 
-    now = timezone.datetime(2023, 8, 1, 19, 38, tzinfo=timezone.utc)
+    now = timezone.now()
     swap_start = now + timezone.timedelta(days=100)
     swap_end = swap_start + timezone.timedelta(days=1)
 
@@ -270,6 +270,32 @@ def test_notify_user_about_shift_swap_request(make_organization, make_user, make
     assert message.apns.payload.aps.sound.critical is False
 
 
+@pytest.mark.django_db
+def test_notify_user_about_shift_swap_request_info_notifications_disabled(
+    make_organization, make_user, make_schedule, make_shift_swap_request
+):
+    organization = make_organization()
+    beneficiary = make_user(organization=organization)
+    benefactor = make_user(organization=organization)
+    schedule = make_schedule(organization, schedule_class=OnCallScheduleWeb)
+
+    FCMDevice.objects.create(user=benefactor, registration_id="test_device_id")
+    MobileAppUserSettings.objects.create(user=benefactor, info_notifications_enabled=False)
+
+    now = timezone.now()
+    swap_start = now + timezone.timedelta(days=100)
+    swap_end = swap_start + timezone.timedelta(days=1)
+
+    shift_swap_request = make_shift_swap_request(
+        schedule, beneficiary, swap_start=swap_start, swap_end=swap_end, created_at=now
+    )
+
+    with patch("apps.mobile_app.tasks._send_push_notification") as mock_send_push_notification:
+        notify_user_about_shift_swap_request(shift_swap_request.pk, benefactor.pk)
+
+    mock_send_push_notification.assert_not_called()
+
+
 @pytest.mark.django_db
 def test_should_notify_user(make_organization, make_user, make_schedule, make_shift_swap_request):
     organization = make_organization()
@@ -288,8 +314,11 @@ def test_should_notify_user(make_organization, make_user, make_schedule, make_sh
     assert not MobileAppUserSettings.objects.exists()
     assert _should_notify_user_about_shift_swap_request(shift_swap_request, benefactor, now) is False
 
+    # check _should_notify_user_about_shift_swap_request is True when info notifications are disabled
     mobile_app_settings = MobileAppUserSettings.objects.create(user=benefactor, info_notifications_enabled=False)
-    assert _should_notify_user_about_shift_swap_request(shift_swap_request, benefactor, now) is False
+    with patch.object(benefactor, "is_in_working_hours", return_value=True):
+        with patch("apps.mobile_app.tasks._has_user_been_notified_for_shift_swap_request", return_value=False):
+            assert _should_notify_user_about_shift_swap_request(shift_swap_request, benefactor, now) is True
 
     mobile_app_settings.info_notifications_enabled = True
     mobile_app_settings.save(update_fields=["info_notifications_enabled"])