Trigger task to publish alerts when sending or cancelling alert

When we send or cancel a broadcast message, we now trigger a task
in govuk-alerts repo that polls our API for alerts and
publishes a fresh list of alerts.

Co-authored-by: Pea Tyczynska <pea.tyczynska@digital.cabinet-office.gov.uk>

app/celery/broadcast_message_tasks.py

@@ -7,7 +7,7 @@ from notifications_utils.clients.zendesk.zendesk_client import (
 
 from app import cbc_proxy_client, notify_celery, zendesk_client
 from app.clients.cbc_proxy import CBCProxyRetryableException
-from app.config import QueueNames
+from app.config import QueueNames, TaskNames
 from app.dao.broadcast_message_dao import (
     create_broadcast_provider_message,
     dao_get_broadcast_event_by_id,
@@ -157,6 +157,11 @@ def send_broadcast_event(broadcast_event_id):
         zendesk_client.send_ticket_to_zendesk(ticket)
         current_app.logger.error(message)
 
+    notify_celery.send_task(
+        name=TaskNames.PUBLISH_GOVUK_ALERTS,
+        queue=QueueNames.GOVUK_ALERTS
+    )
+
     for provider in broadcast_event.service.get_available_broadcast_providers():
         send_broadcast_provider_message.apply_async(
             kwargs={'broadcast_event_id': broadcast_event_id, 'provider': provider},

app/config.py

@@ -35,6 +35,7 @@ class QueueNames(object):
     SAVE_API_EMAIL = 'save-api-email-tasks'
     SAVE_API_SMS = 'save-api-sms-tasks'
     BROADCASTS = 'broadcast-tasks'
+    GOVUK_ALERTS = 'govuk-alerts'
 
     @staticmethod
     def all_queues():
@@ -75,6 +76,7 @@ class TaskNames(object):
     SCAN_FILE = 'scan-file'
     SANITISE_LETTER = 'sanitise-and-upload-letter'
     CREATE_PDF_FOR_TEMPLATED_LETTER = 'create-pdf-for-templated-letter'
+    PUBLISH_GOVUK_ALERTS = 'publish-govuk-alerts'
 
 
 class Config(object):