add permission string filter

app/__init__.py

@@ -4,7 +4,7 @@ from .models import Avatars, Users
 from .auth import digest
 from .routes.users import is_logged_in, get_active_user
 from .constants import (
-    PermissionLevel,
+    PermissionLevel, permission_level_string,
     InfoboxKind, InfoboxIcons, InfoboxHTMLClass
     )
 from datetime import datetime
@@ -120,4 +120,8 @@ def create_app():
 
         return plural
 
+    @app.template_filter("permission_string")
+    def permission_string(term):
+        return permission_level_string(term)
+
     return app