438 lines
15 KiB
Python
438 lines
15 KiB
Python
"""
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对话域持久化 Repository（Async）
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"""
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import uuid as uuid_lib
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.orm import selectinload
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from src.storage.postgres.models_business import Conversation, ConversationStats, Message, ToolCall
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from src.utils import logger
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from src.utils.datetime_utils import utc_now_naive
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MAX_CONVERSATION_TITLE_LENGTH = 255
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class ConversationRepository:
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def __init__(self, db_session: AsyncSession):
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self.db = db_session
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def _normalize_title(self, title: str | None) -> str | None:
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if title is None:
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return None
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normalized = str(title).strip()
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if not normalized:
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return ""
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if len(normalized) > MAX_CONVERSATION_TITLE_LENGTH:
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logger.warning(
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f"Conversation title too long ({len(normalized)}), truncate to {MAX_CONVERSATION_TITLE_LENGTH}"
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)
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return normalized[:MAX_CONVERSATION_TITLE_LENGTH]
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return normalized
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async def create_conversation(
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self,
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user_id: str,
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agent_id: str,
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title: str | None = None,
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thread_id: str | None = None,
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metadata: dict | None = None,
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) -> Conversation:
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if not thread_id:
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thread_id = str(uuid_lib.uuid4())
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metadata = (metadata or {}).copy()
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metadata.setdefault("attachments", [])
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normalized_title = self._normalize_title(title)
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conversation = Conversation(
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thread_id=thread_id,
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user_id=str(user_id),
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agent_id=agent_id,
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title=normalized_title or "New Conversation",
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status="active",
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extra_metadata=metadata,
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)
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self.db.add(conversation)
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await self.db.flush()
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stats = ConversationStats(conversation_id=conversation.id)
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self.db.add(stats)
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await self.db.commit()
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await self.db.refresh(conversation)
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logger.info(f"Created conversation: {conversation.thread_id} for user {user_id}")
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return conversation
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async def get_conversation_by_thread_id(self, thread_id: str) -> Conversation | None:
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result = await self.db.execute(select(Conversation).where(Conversation.thread_id == thread_id))
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return result.scalar_one_or_none()
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async def _get_conversation_by_id(self, conversation_id: int) -> Conversation | None:
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result = await self.db.execute(select(Conversation).where(Conversation.id == conversation_id))
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return result.scalar_one_or_none()
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def _ensure_metadata(self, conversation: Conversation) -> dict:
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metadata = dict(conversation.extra_metadata or {})
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metadata["attachments"] = list(metadata.get("attachments", []))
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return metadata
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async def _save_metadata(self, conversation: Conversation, metadata: dict) -> None:
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conversation.extra_metadata = metadata
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conversation.updated_at = utc_now_naive()
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await self.db.commit()
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await self.db.refresh(conversation)
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async def add_message(
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self,
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conversation_id: int,
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role: str,
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content: str,
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message_type: str = "text",
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extra_metadata: dict | None = None,
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image_content: str | None = None,
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) -> Message:
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message = Message(
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conversation_id=conversation_id,
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role=role,
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content=content,
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message_type=message_type,
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extra_metadata=extra_metadata or {},
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image_content=image_content,
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)
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self.db.add(message)
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conversation = await self._get_conversation_by_id(conversation_id)
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if conversation:
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conversation.updated_at = utc_now_naive()
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await self.db.commit()
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await self.db.refresh(message)
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await self._update_message_count(conversation_id)
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logger.debug(f"Added {role} message to conversation {conversation_id}")
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return message
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async def add_message_by_thread_id(
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self,
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thread_id: str,
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role: str,
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content: str,
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message_type: str = "text",
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extra_metadata: dict | None = None,
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image_content: str | None = None,
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) -> Message | None:
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conversation = await self.get_conversation_by_thread_id(thread_id)
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if not conversation:
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logger.warning(f"Conversation not found for thread_id: {thread_id}")
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return None
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return await self.add_message(
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conversation_id=conversation.id,
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role=role,
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content=content,
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message_type=message_type,
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extra_metadata=extra_metadata,
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image_content=image_content,
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)
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async def add_tool_call(
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self,
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message_id: int,
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tool_name: str,
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tool_input: dict | None = None,
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tool_output: str | None = None,
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status: str = "pending",
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error_message: str | None = None,
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langgraph_tool_call_id: str | None = None,
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) -> ToolCall:
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tool_call = ToolCall(
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message_id=message_id,
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tool_name=tool_name,
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tool_input=tool_input or {},
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tool_output=tool_output,
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status=status,
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error_message=error_message,
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langgraph_tool_call_id=langgraph_tool_call_id,
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)
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self.db.add(tool_call)
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await self.db.commit()
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await self.db.refresh(tool_call)
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logger.debug(f"Added tool call {tool_name} to message {message_id}")
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return tool_call
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async def get_messages(self, conversation_id: int, limit: int | None = None, offset: int = 0) -> list[Message]:
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query = (
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select(Message)
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.options(
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selectinload(Message.tool_calls),
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selectinload(Message.feedbacks),
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)
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.where(Message.conversation_id == conversation_id)
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.order_by(Message.created_at.asc())
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)
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if limit:
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query = query.limit(limit).offset(offset)
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result = await self.db.execute(query)
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return list(result.scalars().unique().all())
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async def get_messages_by_thread_id(
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self, thread_id: str, limit: int | None = None, offset: int = 0
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) -> list[Message]:
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conversation = await self.get_conversation_by_thread_id(thread_id)
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if not conversation:
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logger.warning(f"Conversation not found for thread_id: {thread_id}")
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return []
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return await self.get_messages(conversation.id, limit, offset)
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async def list_conversations(
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self,
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user_id: str | None = None,
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agent_id: str | None = None,
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status: str = "active",
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limit: int | None = None,
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offset: int = 0,
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) -> list[Conversation]:
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"""List conversations with pinned conversations always included first.
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The limit applies only to non-pinned conversations to ensure pinned
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conversations are always visible in the list.
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"""
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from sqlalchemy import or_
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base_conditions = [Conversation.status == status]
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if user_id:
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base_conditions.append(Conversation.user_id == str(user_id))
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if agent_id:
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base_conditions.append(Conversation.agent_id == agent_id)
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# First, get all pinned conversations (no limit)
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pinned_query = (
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select(Conversation)
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.where(*base_conditions)
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.where(Conversation.is_pinned == True)
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.order_by(Conversation.updated_at.desc())
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)
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result = await self.db.execute(pinned_query)
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pinned_conversations = list(result.scalars().all())
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# Then, get non-pinned conversations with limit/offset
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remaining_limit = None
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remaining_offset = offset
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if limit is not None:
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# Calculate how many slots are taken by pinned conversations
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pinned_count = len(pinned_conversations)
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if pinned_count >= limit:
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# All slots taken by pinned conversations
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return pinned_conversations[:limit]
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remaining_limit = limit - pinned_count
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if remaining_limit is not None and remaining_limit > 0:
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non_pinned_query = (
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select(Conversation)
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.where(*base_conditions)
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.where(Conversation.is_pinned == False)
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.order_by(Conversation.updated_at.desc())
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.limit(remaining_limit)
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.offset(remaining_offset)
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)
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result = await self.db.execute(non_pinned_query)
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non_pinned_conversations = list(result.scalars().all())
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else:
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non_pinned_conversations = []
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return pinned_conversations + non_pinned_conversations
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async def update_conversation(
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self,
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thread_id: str,
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title: str | None = None,
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status: str | None = None,
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metadata: dict | None = None,
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is_pinned: bool | None = None,
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) -> Conversation | None:
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conversation = await self.get_conversation_by_thread_id(thread_id)
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if not conversation:
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return None
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normalized_title = self._normalize_title(title)
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if normalized_title is not None:
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conversation.title = normalized_title
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if status is not None:
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conversation.status = status
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if is_pinned is not None:
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conversation.is_pinned = is_pinned
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if metadata is not None:
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current_metadata = conversation.extra_metadata or {}
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current_metadata.update(metadata)
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conversation.extra_metadata = current_metadata
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conversation.updated_at = utc_now_naive()
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await self.db.commit()
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await self.db.refresh(conversation)
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logger.info(f"Updated conversation {thread_id}")
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return conversation
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async def delete_conversation(self, thread_id: str, soft_delete: bool = True) -> bool:
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conversation = await self.get_conversation_by_thread_id(thread_id)
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if not conversation:
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return False
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if soft_delete:
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conversation.status = "deleted"
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await self.db.commit()
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logger.info(f"Soft deleted conversation {thread_id}")
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else:
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self.db.delete(conversation)
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await self.db.commit()
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logger.info(f"Permanently deleted conversation {thread_id}")
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return True
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async def get_stats(self, conversation_id: int) -> ConversationStats | None:
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result = await self.db.execute(
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select(ConversationStats).where(ConversationStats.conversation_id == conversation_id)
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)
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return result.scalar_one_or_none()
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async def update_stats(
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self,
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conversation_id: int,
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tokens_used: int | None = None,
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model_used: str | None = None,
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user_feedback: dict | None = None,
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) -> ConversationStats | None:
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stats = await self.get_stats(conversation_id)
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if not stats:
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return None
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if tokens_used is not None:
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stats.total_tokens += tokens_used
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if model_used is not None:
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stats.model_used = model_used
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if user_feedback is not None:
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stats.user_feedback = user_feedback
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stats.updated_at = utc_now_naive()
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await self.db.commit()
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await self.db.refresh(stats)
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return stats
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async def get_tool_call_by_langgraph_id(self, langgraph_tool_call_id: str) -> ToolCall | None:
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result = await self.db.execute(
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select(ToolCall).where(ToolCall.langgraph_tool_call_id == langgraph_tool_call_id)
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)
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return result.scalar_one_or_none()
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async def update_tool_call_output(
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self,
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langgraph_tool_call_id: str,
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tool_output: str,
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status: str = "success",
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error_message: str | None = None,
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) -> ToolCall | None:
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tool_call = await self.get_tool_call_by_langgraph_id(langgraph_tool_call_id)
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if not tool_call:
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logger.warning(f"Tool call not found for langgraph_tool_call_id: {langgraph_tool_call_id}")
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return None
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tool_call.tool_output = tool_output
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tool_call.status = status
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if error_message:
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tool_call.error_message = error_message
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await self.db.commit()
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await self.db.refresh(tool_call)
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logger.debug(f"Updated tool call {langgraph_tool_call_id} with output")
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return tool_call
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async def _update_message_count(self, conversation_id: int) -> None:
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from sqlalchemy import func
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stats = await self.get_stats(conversation_id)
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if stats:
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result = await self.db.execute(select(func.count()).where(Message.conversation_id == conversation_id))
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message_count = result.scalar()
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stats.message_count = message_count
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await self.db.commit()
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async def get_attachments(self, conversation_id: int) -> list[dict]:
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conversation = await self._get_conversation_by_id(conversation_id)
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if not conversation:
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return []
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metadata = self._ensure_metadata(conversation)
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return list(metadata.get("attachments", []))
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async def get_attachments_by_thread_id(self, thread_id: str) -> list[dict]:
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conversation = await self.get_conversation_by_thread_id(thread_id)
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if not conversation:
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return []
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return await self.get_attachments(conversation.id)
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async def add_attachment(self, conversation_id: int, attachment_info: dict) -> dict | None:
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conversation = await self._get_conversation_by_id(conversation_id)
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if not conversation:
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return None
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metadata = self._ensure_metadata(conversation)
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attachments = metadata.get("attachments", [])
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attachments = [item for item in attachments if item.get("file_id") != attachment_info.get("file_id")]
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attachments.append(attachment_info)
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metadata["attachments"] = attachments
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await self._save_metadata(conversation, metadata)
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return attachment_info
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async def update_attachment_status(
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self, conversation_id: int, file_id: str, status: str, update_fields: dict | None = None
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) -> dict | None:
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conversation = await self._get_conversation_by_id(conversation_id)
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if not conversation:
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return None
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metadata = self._ensure_metadata(conversation)
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attachments = metadata.get("attachments", [])
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target = None
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for item in attachments:
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if item.get("file_id") == file_id:
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item["status"] = status
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if update_fields:
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item.update(update_fields)
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target = item
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break
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if target is not None:
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metadata["attachments"] = attachments
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await self._save_metadata(conversation, metadata)
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return target
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async def remove_attachment(self, conversation_id: int, file_id: str) -> bool:
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conversation = await self._get_conversation_by_id(conversation_id)
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if not conversation:
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return False
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metadata = self._ensure_metadata(conversation)
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attachments = metadata.get("attachments", [])
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new_attachments = [item for item in attachments if item.get("file_id") != file_id]
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if len(new_attachments) == len(attachments):
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return False
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metadata["attachments"] = new_attachments
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await self._save_metadata(conversation, metadata)
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return True
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