from abc import abstractmethod
from pydantic import BaseModel


class BaseRedisModel(BaseModel):

    @abstractmethod
    def to_list(self) -> list:
        """Convert to list for Redis storage."""
        pass

    @abstractmethod
    def count(self) -> int:
        """Return the number of elements in the list."""
        pass

    @abstractmethod
    def delimiter(self) -> str:
        """Return the delimiter for the list."""
        pass