Remove the template_postage parameter for persist_notification

It was confusing to have 2 differnt postage parameters.

app/celery/tasks.py

@@ -354,7 +354,7 @@ def save_letter(
         saved_notification = persist_notification(
             template_id=notification['template'],
             template_version=notification['template_version'],
-            template_postage=template.postage,
+            postage=template.postage,
             recipient=recipient,
             service=service,
             personalisation=notification['personalisation'],

app/notifications/process_letter_notifications.py

@@ -19,7 +19,6 @@ def create_letter_notification(
     notification = persist_notification(
         template_id=template.id,
         template_version=template.version,
-        template_postage=template.postage,
         # we only accept addresses_with_underscores from the API (from CSV we also accept dashes, spaces etc)
         recipient=PostalAddress.from_personalisation(letter_data['personalisation']).normalised,
         service=service,
@@ -34,9 +33,9 @@ def create_letter_notification(
         status=status,
         reply_to_text=reply_to_text,
         billable_units=billable_units,
-        # letter_data.get('postage') is only set for precompiled letters
+        # letter_data.get('postage') is only set for precompiled letters (if international it is set after sanitise)
         # letters from a template will pass in 'europe' or 'rest-of-world' if None then use postage from template
-        postage=postage or letter_data.get('postage'),
+        postage=postage or letter_data.get('postage') or template.postage,
         updated_at=updated_at
     )
     return notification

app/notifications/process_notifications.py

@@ -107,7 +107,6 @@ def persist_notification(
     reply_to_text=None,
     billable_units=None,
     postage=None,
-    template_postage=None,
     document_download_count=None,
     updated_at=None
 ):
@@ -147,8 +146,8 @@ def persist_notification(
     elif notification_type == EMAIL_TYPE:
         notification.normalised_to = format_email_address(notification.to)
     elif notification_type == LETTER_TYPE:
-        notification.postage = postage or template_postage
-        notification.international = True if postage in INTERNATIONAL_POSTAGE_TYPES else False
+        notification.postage = postage
+        notification.international = postage in INTERNATIONAL_POSTAGE_TYPES
         notification.normalised_to = ''.join(notification.to.split()).lower()
 
     # if simulated create a Notification model to return but do not persist the Notification to the dB

app/notifications/rest.py

@@ -120,7 +120,7 @@ def send_notification(notification_type):
     simulated = simulated_recipient(notification_form['to'], notification_type)
     notification_model = persist_notification(template_id=template.id,
                                               template_version=template.version,
-                                              template_postage=template.postage,
+                                              postage=template.postage,
                                               recipient=request.get_json()['to'],
                                               service=authenticated_service,
                                               personalisation=notification_form.get('personalisation', None),

app/service/send_notification.py

@@ -80,6 +80,8 @@ def send_one_off_notification(service_id, post_data):
         # Validate address and set postage to europe|rest-of-world if international letter,
         # otherwise persist_notification with use template postage
         postage = validate_address(service, personalisation)
+        if not postage:
+            postage = template.postage
     validate_created_by(service, post_data['created_by'])
 
     sender_id = post_data.get('sender_id', None)
@@ -92,7 +94,6 @@ def send_one_off_notification(service_id, post_data):
     notification = persist_notification(
         template_id=template.id,
         template_version=template.version,
-        template_postage=template.postage,
         recipient=post_data['to'],
         service=service,
         personalisation=personalisation,
@@ -178,7 +179,6 @@ def send_pdf_letter_notification(service_id, post_data):
         notification_id=post_data['file_id'],
         template_id=template.id,
         template_version=template.version,
-        template_postage=template.postage,
         recipient=urllib.parse.unquote(post_data['recipient_address']),
         service=service,
         personalisation=personalisation,
@@ -189,7 +189,7 @@ def send_pdf_letter_notification(service_id, post_data):
         client_reference=post_data['filename'],
         created_by_id=post_data['created_by'],
         billable_units=billable_units,
-        postage=post_data['postage'],
+        postage=post_data['postage'] or template.postage,
     )
 
     upload_filename = get_letter_pdf_filename(