No emails, texts or letters for broadcast services

To make the interface as simple as possible we don’t want to mix up
sending other types of communication where services have the broadcast
permission.

This commit removes the other permissions once a service has been given
the broadcast permission by a platform admin user.

app/main/views/service_settings.py

@@ -305,6 +305,35 @@ def service_set_permission(service_id, permission):
     )
 
 
+@main.route("/services/<uuid:service_id>/service-settings/permissions/broadcast", methods=["GET", "POST"])
+@user_is_platform_admin
+def service_set_broadcast_permission(service_id):
+
+    title = PLATFORM_ADMIN_SERVICE_PERMISSIONS['broadcast']['title']
+    form = ServiceOnOffSettingForm(
+        name=title,
+        enabled=current_service.has_permission('broadcast')
+    )
+
+    if form.validate_on_submit():
+
+        if form.enabled.data:
+            current_service.force_permission('broadcast', on=True)
+            current_service.force_permission('email', on=False)
+            current_service.force_permission('sms', on=False)
+            current_service.force_permission('letter', on=False)
+        else:
+            current_service.force_permission('broadcast', on=False)
+
+        return redirect(url_for(".service_settings", service_id=service_id))
+
+    return render_template(
+        'views/service-settings/set-service-setting.html',
+        title=title,
+        form=form,
+    )
+
+
 @main.route("/services/<uuid:service_id>/service-settings/archive", methods=['GET', 'POST'])
 @user_has_permissions('manage_service')
 def archive_service(service_id):

app/navigation.py

@@ -307,6 +307,7 @@ class HeaderNavigation(Navigation):
         'service_switch_count_as_live',
         'service_switch_live',
         'service_set_permission',
+        'service_set_broadcast_permission',
         'service_verify_reply_to_address',
         'service_verify_reply_to_address_updates',
         'services_or_dashboard',
@@ -635,6 +636,7 @@ class MainNavigation(Navigation):
         'service_switch_count_as_live',
         'service_switch_live',
         'service_set_permission',
+        'service_set_broadcast_permission',
         'services_or_dashboard',
         'show_accounts_or_dashboard',
         'sign_in',
@@ -933,6 +935,7 @@ class CaseworkNavigation(Navigation):
         'service_switch_count_as_live',
         'service_switch_live',
         'service_set_permission',
+        'service_set_broadcast_permission',
         'service_verify_reply_to_address',
         'service_verify_reply_to_address_updates',
         'services_or_dashboard',
@@ -1237,6 +1240,7 @@ class OrgNavigation(Navigation):
         'service_switch_count_as_live',
         'service_switch_live',
         'service_set_permission',
+        'service_set_broadcast_permission',
         'service_verify_reply_to_address',
         'service_verify_reply_to_address_updates',
         'services_or_dashboard',