xiaoxia-saas/packages/domain/points_transaction.py

from __future__ import annotations

from dataclasses import dataclass, field
from datetime import datetime, timezone
from uuid import uuid4


@dataclass(slots=True)
class PointsTransaction:
    id: str
    user_id: str
    account_id: str
    type: str  # earn / spend / refund
    source: str
    amount: int
    balance_after: int
    description: str = ""
    ref_id: str = ""
    created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))

    @classmethod
    def create(
        cls,
        user_id: str,
        account_id: str,
        type: str,
        source: str,
        amount: int,
        balance_after: int,
        description: str = "",
        ref_id: str = "",
    ) -> "PointsTransaction":
        return cls(
            id=uuid4().hex,
            user_id=user_id,
            account_id=account_id,
            type=type,
            source=source,
            amount=amount,
            balance_after=balance_after,
            description=description,
            ref_id=ref_id,
        )