init commit

app/models/channel.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+from datetime import datetime
+from sqlalchemy import ForeignKey, String, BigInteger, Boolean, UniqueConstraint, func, DateTime
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from app.db.session import Base
+
+class Channel(Base):
+    __tablename__ = "channels"
+    __table_args__ = (UniqueConstraint("owner_id", "chat_id", name="uq_owner_chat"),)
+
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
+    owner_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"))
+    chat_id: Mapped[int] = mapped_column(BigInteger, index=True)
+    title: Mapped[str | None] = mapped_column(String(128))
+    username: Mapped[str | None] = mapped_column(String(64))
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    owner = relationship("User")
+
+class BotChannel(Base):
+    __tablename__ = "bot_channels"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    bot_id: Mapped[int] = mapped_column(ForeignKey("bots.id", ondelete="CASCADE"))
+    channel_id: Mapped[int] = mapped_column(ForeignKey("channels.id", ondelete="CASCADE"))
+    can_post: Mapped[bool] = mapped_column(Boolean, default=True)