Refactored code for new service permissions

app/main/views/send.py

@@ -245,7 +245,7 @@ def send_test_step(service_id, template_id, step_index):
         current_placeholder,
         dict_to_populate_from=get_normalised_send_test_values_from_session(),
         optional_placeholder=optional_placeholder,
-        allow_international_phone_numbers=current_service['can_send_international_sms'],
+        allow_international_phone_numbers='international_sms' in current_service['permissions'],
     )
 
     if form.validate_on_submit():
@@ -375,7 +375,7 @@ def _check_messages(service_id, template_type, upload_id, letters_as_pdf=False):
             [user.name, user.mobile_number, user.email_address] for user in users
         ) if current_service['restricted'] else None,
         remaining_messages=remaining_messages,
-        international_sms=current_service['can_send_international_sms'],
+        international_sms='international_sms' in current_service['permissions'],
     )
 
     if request.args.get('from_test'):

app/main/views/service_settings.py

@@ -208,14 +208,24 @@ def service_switch_research_mode(service_id):
     return redirect(url_for('.service_settings', service_id=service_id))
 
 
+def switch_service_permissions(service_id, permission):
+    permissions = current_service['permissions'].copy()
+    if permission in permissions:
+        permissions.remove(permission)
+    else:
+        permissions.append(permission)
+
+    service_api_client.update_service_with_properties(
+        service_id,
+        {'permissions': permissions}
+    )
+
+
 @main.route("/services/<service_id>/service-settings/can-send-letters")
 @login_required
 @user_has_permissions(admin_override=True)
 def service_switch_can_send_letters(service_id):
-    service_api_client.update_service_with_properties(
-        service_id,
-        {"can_send_letters": not current_service['can_send_letters']}
-    )
+    switch_service_permissions(service_id, 'letter')
     return redirect(url_for('.service_settings', service_id=service_id))
 
 
@@ -223,10 +233,7 @@ def service_switch_can_send_letters(service_id):
 @login_required
 @user_has_permissions(admin_override=True)
 def service_switch_can_send_international_sms(service_id):
-    service_api_client.update_service_with_properties(
-        service_id,
-        {"can_send_international_sms": not current_service['can_send_international_sms']}
-    )
+    switch_service_permissions(service_id, 'international_sms')
     return redirect(url_for('.service_settings', service_id=service_id))
 
 
@@ -350,7 +357,7 @@ def service_set_letters(service_id):
 @user_has_permissions('manage_settings', admin_override=True)
 def service_set_letter_contact_block(service_id):
 
-    if not current_service['can_send_letters']:
+    if 'letter' not in current_service['permissions']:
         abort(403)
 
     form = ServiceLetterContactBlock(letter_contact_block=current_service['letter_contact_block'])

app/main/views/templates.py

@@ -184,7 +184,7 @@ def view_template_version_preview(service_id, template_id, version, filetype):
 def add_template_by_type(service_id):
 
     form = ChooseTemplateType(
-        include_letters=current_service['can_send_letters']
+        include_letters='letter' in current_service['permissions']
     )
 
     if form.validate_on_submit():
@@ -220,7 +220,7 @@ def add_service_template(service_id, template_type):
 
     if template_type not in ['sms', 'email', 'letter']:
         abort(404)
-    if not current_service['can_send_letters'] and template_type == 'letter':
+    if 'letter' not in current_service['permissions'] and template_type == 'letter':
         abort(403)
 
     form = form_objects[template_type]()
@@ -448,5 +448,5 @@ def get_human_readable_delta(from_time, until_time):
 def should_show_template(template_type):
     return (
         template_type != 'letter' or
-        current_service['can_send_letters']
+        'letter' in current_service['permissions']
     )