完善节目平台与直播监控体验

backend/models/audit.py

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+import uuid
+from datetime import datetime
+
+from sqlalchemy import Boolean, DateTime, Float, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from database import Base
+
+
+class ViewerSession(Base):
+    __tablename__ = "viewer_sessions"
+
+    session_id: Mapped[str] = mapped_column(String(64), primary_key=True)
+    stream_id: Mapped[int] = mapped_column(ForeignKey("streams.id"), index=True)
+    node_id: Mapped[str | None] = mapped_column(String(128), nullable=True)
+    node_name: Mapped[str | None] = mapped_column(String(200), nullable=True)
+    quality: Mapped[str | None] = mapped_column(String(64), nullable=True)
+    playback_state: Mapped[str] = mapped_column(String(32), default="idle")
+    buffered_seconds: Mapped[float | None] = mapped_column(Float, nullable=True)
+    error: Mapped[str | None] = mapped_column(Text, nullable=True)
+    remote_adjusted: Mapped[bool] = mapped_column(Boolean, default=False)
+    last_heartbeat: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, index=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+
+class ControlSession(Base):
+    __tablename__ = "control_sessions"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    token: Mapped[str] = mapped_column(String(128), unique=True, default=lambda: uuid.uuid4().hex)
+    stream_id: Mapped[int] = mapped_column(ForeignKey("streams.id"), index=True)
+    operator: Mapped[str] = mapped_column(String(128), default="administrator")
+    expires_at: Mapped[datetime] = mapped_column(DateTime, index=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+
+class ControlCommand(Base):
+    __tablename__ = "control_commands"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    control_session_id: Mapped[int] = mapped_column(ForeignKey("control_sessions.id"), index=True)
+    stream_id: Mapped[int] = mapped_column(ForeignKey("streams.id"), index=True)
+    target_session_id: Mapped[str] = mapped_column(ForeignKey("viewer_sessions.session_id"), index=True)
+    operator: Mapped[str] = mapped_column(String(128), default="administrator")
+    action: Mapped[str] = mapped_column(String(32))
+    value: Mapped[str | None] = mapped_column(String(256), nullable=True)
+    status: Mapped[str] = mapped_column(String(32), default="pending")
+    result: Mapped[str | None] = mapped_column(Text, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, index=True)
+    claimed_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)