Form validation

project/jinja2env.py

@@ -1,10 +1,20 @@
+from typing import Any
+
 from jinja2 import Environment
 
 
+def conditional_cls(conditions: dict[str, Any]) -> str:
+    result = []
+    for cls, condition in conditions.items():
+        if condition:
+            result.append(cls)
+    return " ".join(result)
+
+
 def environment(**options):
     env = Environment(**options)
 
     env.globals.update({
-        # "url": reverse_url,
+        "conditional_cls": conditional_cls,
     })
     return env