from dataclasses import dataclass
import uuid

@dataclass
class Image:
    type: int
    extension: str
    permanent: bool = False
    id: str | None = None

    def __post_init__(self):
        if self.id is None:
            self.id = str(uuid.uuid4())

    @classmethod
    def from_dict(cls, d: dict):
        return cls(
            id=d.get('id'),
            type=d.get('type'),
            permanent=d.get('permanent', False),
            extension=d.get('extension')
        )

    def to_dict(self):
        return {
            'id': self.id,
            'type': self.type,
            'permanent': self.permanent,
            'extension': self.extension
        }