#805 admin only permissions on Screening Status taxonomy

opentech/public/utils/wagtail_hooks.py

+from wagtail.contrib.modeladmin.helpers import PermissionHelper
 from wagtail.contrib.modeladmin.options import ModelAdminGroup, ModelAdmin, modeladmin_register
 
 from opentech.apply.funds.models import ScreeningStatus
@@ -15,9 +16,26 @@ class PersonTypeModelAdmin(ModelAdmin):
     menu_icon = 'tag'
 
 
+class ScreeningStatusPermissionHelper(PermissionHelper):
+    def user_can_edit_obj(self, user, obj):
+        """
+        Return a boolean to indicate whether `user` is permitted to 'change'
+        a specific `self.model` instance.
+        """
+        return user.is_superuser
+
+    def user_can_delete_obj(self, user, obj):
+        """
+        Return a boolean to indicate whether `user` is permitted to 'delete'
+        a specific `self.model` instance.
+        """
+        return user.is_superuser
+
+
 class ScreeningStatusModelAdmin(ModelAdmin):
     model = ScreeningStatus
     menu_icon = 'tag'
+    permission_helper_class = ScreeningStatusPermissionHelper
 
 
 class TaxonomiesModelAdminGroup(ModelAdminGroup):