60 lines
2.5 KiB
Python
60 lines
2.5 KiB
Python
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"""Feed model."""
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from datetime import datetime, timezone
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from sqlalchemy import Boolean, DateTime, Integer, JSON, String, Text
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.models.base import Base, TimestampMixin, UUIDMixin
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class Feed(Base, UUIDMixin, TimestampMixin):
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"""RSS feed source."""
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__tablename__ = "feeds"
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url: Mapped[str] = mapped_column(String(2048), unique=True, nullable=False, index=True)
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title: Mapped[str | None] = mapped_column(String(512), default="")
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description: Mapped[str | None] = mapped_column(Text, default="")
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category: Mapped[str | None] = mapped_column(String(128), default="")
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is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False, index=True)
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fetch_interval_minutes: Mapped[int] = mapped_column(Integer, default=60, nullable=False)
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priority: Mapped[int] = mapped_column(Integer, default=5, nullable=False)
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parser_config: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)
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proxy_policy: Mapped[str] = mapped_column(String(32), default="auto", nullable=False)
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# Fetch statistics
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last_fetch_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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last_fetch_status: Mapped[str | None] = mapped_column(String(32), default="")
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last_error: Mapped[str | None] = mapped_column(Text, default="")
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error_type: Mapped[str | None] = mapped_column(String(64), default="")
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success_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
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fail_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
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article_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
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raw_articles: Mapped[list["RawArticle"]] = relationship(
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"RawArticle", back_populates="feed", cascade="all, delete-orphan"
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)
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def health_status(self, now: datetime | None = None) -> str:
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"""Compute feed health status."""
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if now is None:
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now = datetime.now(timezone.utc)
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total = self.success_count + self.fail_count
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if total == 0:
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return "unknown"
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success_rate = self.success_count / total
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days_since = None
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if self.last_fetch_at:
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days_since = (now - self.last_fetch_at).days
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if success_rate >= 0.9 and (days_since is None or days_since <= 7):
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return "healthy"
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if success_rate >= 0.5 and (days_since is None or days_since <= 7):
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return "warning"
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return "unhealthy"
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def __repr__(self) -> str:
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return f"<Feed {self.title or self.url}>"
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