Change postage while editing template

app/main/forms.py

@@ -447,6 +447,16 @@ class EmailTemplateForm(BaseTemplateForm):
 
 
 class LetterTemplateForm(EmailTemplateForm):
+    postage = RadioField(
+        'Choose postage',
+        choices=[
+            ('first', 'First class'),
+            ('second', 'Second class'),
+            ('service_default', "Service default"),
+        ],
+        validators=[DataRequired()],
+        default='service_default'
+    )
 
     subject = TextAreaField(
         u'Main heading',

app/main/views/templates.py

@@ -571,15 +571,27 @@ def edit_service_template(service_id, template_id):
             abort_403_if_not_admin_user()
 
         subject = form.subject.data if hasattr(form, 'subject') else None
-        new_template = get_template({
+
+        new_template_data = {
             'name': form.name.data,
             'content': form.template_content.data,
             'subject': subject,
             'template_type': template['template_type'],
             'id': template['id'],
             'process_type': form.process_type.data,
-            'reply_to_text': template['reply_to_text']
-        }, current_service)
+            'reply_to_text': template['reply_to_text'],
+        }
+        if (
+            current_service.has_permission("choose_postage") and template["template_type"] == "letter"
+        ) and form.postage.data in ["first", "second"]:
+            postage = {"postage": form.postage.data }
+
+        else:
+            postage = {}
+
+        new_template_data.update(postage)
+
+        new_template = get_template(new_template_data, current_service)
         template_change = get_template(template, current_service).compare_to(new_template)
         if template_change.placeholders_added and not request.form.get('confirm'):
             example_column_headings = (
@@ -606,7 +618,8 @@ def edit_service_template(service_id, template_id):
                 form.template_content.data,
                 service_id,
                 subject,
-                form.process_type.data
+                form.process_type.data,
+                postage=postage.get("postage")
             )
         except HTTPError as e:
             if e.status_code == 400:
@@ -637,6 +650,7 @@ def edit_service_template(service_id, template_id):
         return render_template(
             'views/edit-{}-template.html'.format(template['template_type']),
             form=form,
+            can_choose_postage=current_service.has_permission("choose_postage"),
             template_id=template_id,
             template_type=template['template_type'],
             heading_action='Edit',

app/notify_client/service_api_client.py

@@ -153,7 +153,7 @@ class ServiceAPIClient(NotifyAdminAPIClient):
     @cache.delete('service-{service_id}-templates')
     @cache.delete('template-{id_}-version-None')
     @cache.delete('template-{id_}-versions')
-    def update_service_template(self, id_, name, type_, content, service_id, subject=None, process_type=None):
+    def update_service_template(self, id_, name, type_, content, service_id, subject=None, process_type=None, postage=None):
         """
         Update a service template.
         """
@@ -172,6 +172,10 @@ class ServiceAPIClient(NotifyAdminAPIClient):
             data.update({
                 'process_type': process_type
             })
+        if postage:
+            data.update({
+                'postage': postage
+            })
         data = _attach_current_user(data)
         endpoint = "/service/{0}/template/{1}".format(service_id, id_)
         return self.post(endpoint, data)

app/templates/views/edit-letter-template.html

@@ -1,6 +1,7 @@
 {% extends "withnav_template.html" %}
 {% from "components/textbox.html" import textbox %}
 {% from "components/page-footer.html" import page_footer %}
+{% from "components/radios.html" import radios %}
 {% from "components/form.html" import form_wrapper %}
 
 {% block service_page_title %}
@@ -17,6 +18,9 @@
       <div class="grid-row">
         <div class="column-five-sixths">
           {{ textbox(form.name, width='1-1', hint='Your recipients won’t see this', rows=10) }}
+          {% if can_choose_postage %}
+            {{ radios(form.postage, hint='Go to Settings to change default postage for your service') }}
+          {% endif %}
           {{ textbox(form.subject, width='1-1', highlight_tags=True, rows=2) }}
           {{ textbox(form.template_content, highlight_tags=True, width='1-1', rows=8) }}
           {{ page_footer(