45 lines
1.8 KiB
Python
45 lines
1.8 KiB
Python
from datetime import UTC, datetime
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from sqlalchemy import select, update
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from sqlalchemy.engine import CursorResult
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.core.errors import ConflictAgentError, ResourceNotFoundError
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from app.model.session import ConversationSession
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class SessionRepository:
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def __init__(self, session: AsyncSession) -> None:
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self.session = session
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async def owned(
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self, session_id: str, user_id: int, *, lock: bool = False
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) -> ConversationSession:
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query = select(ConversationSession).where(ConversationSession.session_id == session_id,
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ConversationSession.user_id == user_id)
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if lock:
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query = query.with_for_update()
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row = await self.session.scalar(query)
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if row is None:
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raise ResourceNotFoundError("会话不存在")
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return row
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async def require_active(self, session_id: str, user_id: int, agent_type: str) -> None:
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row = await self.owned(session_id, user_id, lock=True)
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if row.status != "active":
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raise ConflictAgentError("会话已结束")
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if row.agent_type != agent_type:
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raise ConflictAgentError("Agent 与会话不一致")
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row.message_count += 1
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row.last_active_at = datetime.now(UTC).replace(tzinfo=None)
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async def advance_clarification(self, session_id: str, expected: int) -> bool:
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if expected >= 10:
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return False
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result = await self.session.execute(update(ConversationSession).where(
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ConversationSession.session_id == session_id,
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ConversationSession.clarification_round == expected,
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ConversationSession.status == "active",
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).values(clarification_round=expected + 1))
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return isinstance(result, CursorResult) and result.rowcount == 1
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