feat: 添加 SQLAlchemy 模型 + Alembic 数据库迁移

app/models/announcement.py

@@ -0,0 +1,40 @@
+import hashlib
+from datetime import datetime, date
+from sqlalchemy import String, Boolean, DateTime, Integer, Text, func
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+class Announcement(Base):
+    __tablename__ = "announcements"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    title: Mapped[str] = mapped_column(String(500), nullable=False)
+    publish_date: Mapped[datetime] = mapped_column(DateTime, nullable=False)
+    purchase_name: Mapped[str] = mapped_column(String(200), default="")
+    content_url: Mapped[str] = mapped_column(Text, default="")
+    source_code: Mapped[str] = mapped_column(String(50), nullable=False)
+    source_name: Mapped[str] = mapped_column(String(100), nullable=False)
+    announcement_type: Mapped[str] = mapped_column(String(50), default="purchase")
+    content_hash: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
+    crawl_mode: Mapped[str] = mapped_column(String(20), default="auto")
+    is_new: Mapped[bool] = mapped_column(Boolean, default=True)
+    is_sent: Mapped[bool] = mapped_column(Boolean, default=False)
+    keyword_matched: Mapped[bool] = mapped_column(Boolean, default=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now(), onupdate=func.now())
+
+    @staticmethod
+    def generate_hash(title: str, publish_date: str, purchase_name: str,
+                      content_url: str, source_code: str) -> str:
+        content = f"{title}|{publish_date}|{purchase_name}|{content_url}|{source_code}"
+        return hashlib.sha256(content.encode("utf-8")).hexdigest()
+
+    @staticmethod
+    def source_map() -> dict:
+        import json
+        from app.config import settings
+        return json.loads(settings.announcement_sources)