"""收藏。"""
from __future__ import annotations

from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, UniqueConstraint, func
from sqlalchemy.orm import Mapped, mapped_column

from app.database import Base


class Bookmark(Base):
    __tablename__ = "bookmarks"

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    article_id: Mapped[int] = mapped_column(
        ForeignKey("articles.id", ondelete="CASCADE"), nullable=False, index=True
    )
    note: Mapped[str | None] = mapped_column()
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )

    __table_args__ = (UniqueConstraint("user_id", "article_id", name="uq_bookmark_user_article"),)