import json
from datetime import date
from typing import Type, Any


__all__ = ["format_json"]


class JSONEncoder(json.JSONEncoder):
    def default(self, o: Any) -> Any:
        if isinstance(o, date):
            return o.isoformat()

        return super().default(o)


def format_json(value: list | dict, cls: Type[json.JSONEncoder] = JSONEncoder) -> str:
    return json.dumps(value, cls=cls)