mirror of
https://github.com/MODSetter/SurfSense.git
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254 lines
8.3 KiB
Python
254 lines
8.3 KiB
Python
from fastapi import APIRouter, Depends, HTTPException
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from fastapi.responses import StreamingResponse
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from langchain.schema import AIMessage, HumanMessage
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from sqlalchemy.exc import IntegrityError, OperationalError
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.future import select
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from app.db import Chat, SearchSpace, User, get_async_session
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from app.schemas import (
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AISDKChatRequest,
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ChatCreate,
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ChatRead,
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ChatReadWithoutMessages,
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ChatUpdate,
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)
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from app.tasks.stream_connector_search_results import stream_connector_search_results
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from app.users import current_active_user
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from app.utils.check_ownership import check_ownership
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router = APIRouter()
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@router.post("/chat")
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async def handle_chat_data(
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request: AISDKChatRequest,
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session: AsyncSession = Depends(get_async_session),
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user: User = Depends(current_active_user),
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):
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messages = request.messages
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if messages[-1]["role"] != "user":
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raise HTTPException(
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status_code=400, detail="Last message must be a user message"
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)
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user_query = messages[-1]["content"]
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search_space_id = request.data.get("search_space_id")
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research_mode: str = request.data.get("research_mode")
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selected_connectors: list[str] = request.data.get("selected_connectors")
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document_ids_to_add_in_context: list[int] = request.data.get(
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"document_ids_to_add_in_context"
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)
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search_mode_str = request.data.get("search_mode", "CHUNKS")
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# Convert search_space_id to integer if it's a string
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if search_space_id and isinstance(search_space_id, str):
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try:
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search_space_id = int(search_space_id)
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except ValueError:
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raise HTTPException(
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status_code=400, detail="Invalid search_space_id format"
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) from None
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# Check if the search space belongs to the current user
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try:
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await check_ownership(session, SearchSpace, search_space_id, user)
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except HTTPException:
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raise HTTPException(
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status_code=403, detail="You don't have access to this search space"
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) from None
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langchain_chat_history = []
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for message in messages[:-1]:
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if message["role"] == "user":
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langchain_chat_history.append(HumanMessage(content=message["content"]))
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elif message["role"] == "assistant":
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langchain_chat_history.append(AIMessage(content=message["content"]))
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response = StreamingResponse(
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stream_connector_search_results(
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user_query,
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user.id,
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search_space_id,
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session,
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research_mode,
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selected_connectors,
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langchain_chat_history,
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search_mode_str,
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document_ids_to_add_in_context,
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)
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)
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response.headers["x-vercel-ai-data-stream"] = "v1"
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return response
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@router.post("/chats/", response_model=ChatRead)
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async def create_chat(
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chat: ChatCreate,
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session: AsyncSession = Depends(get_async_session),
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user: User = Depends(current_active_user),
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):
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try:
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await check_ownership(session, SearchSpace, chat.search_space_id, user)
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db_chat = Chat(**chat.model_dump())
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session.add(db_chat)
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await session.commit()
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await session.refresh(db_chat)
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return db_chat
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except HTTPException:
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raise
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except IntegrityError:
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await session.rollback()
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raise HTTPException(
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status_code=400,
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detail="Database constraint violation. Please check your input data.",
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) from None
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except OperationalError:
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await session.rollback()
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raise HTTPException(
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status_code=503, detail="Database operation failed. Please try again later."
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) from None
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except Exception:
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await session.rollback()
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raise HTTPException(
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status_code=500,
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detail="An unexpected error occurred while creating the chat.",
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) from None
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@router.get("/chats/", response_model=list[ChatReadWithoutMessages])
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async def read_chats(
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skip: int = 0,
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limit: int = 100,
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search_space_id: int | None = None,
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session: AsyncSession = Depends(get_async_session),
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user: User = Depends(current_active_user),
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):
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try:
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# Select specific fields excluding messages
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query = (
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select(
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Chat.id,
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Chat.type,
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Chat.title,
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Chat.initial_connectors,
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Chat.search_space_id,
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Chat.created_at,
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)
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.join(SearchSpace)
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.filter(SearchSpace.user_id == user.id)
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)
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# Filter by search_space_id if provided
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if search_space_id is not None:
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query = query.filter(Chat.search_space_id == search_space_id)
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result = await session.execute(query.offset(skip).limit(limit))
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return result.all()
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except OperationalError:
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raise HTTPException(
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status_code=503, detail="Database operation failed. Please try again later."
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) from None
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except Exception:
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raise HTTPException(
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status_code=500, detail="An unexpected error occurred while fetching chats."
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) from None
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@router.get("/chats/{chat_id}", response_model=ChatRead)
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async def read_chat(
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chat_id: int,
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session: AsyncSession = Depends(get_async_session),
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user: User = Depends(current_active_user),
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):
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try:
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result = await session.execute(
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select(Chat)
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.join(SearchSpace)
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.filter(Chat.id == chat_id, SearchSpace.user_id == user.id)
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)
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chat = result.scalars().first()
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if not chat:
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raise HTTPException(
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status_code=404,
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detail="Chat not found or you don't have permission to access it",
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)
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return chat
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except OperationalError:
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raise HTTPException(
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status_code=503, detail="Database operation failed. Please try again later."
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) from None
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except Exception:
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raise HTTPException(
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status_code=500,
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detail="An unexpected error occurred while fetching the chat.",
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) from None
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@router.put("/chats/{chat_id}", response_model=ChatRead)
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async def update_chat(
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chat_id: int,
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chat_update: ChatUpdate,
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session: AsyncSession = Depends(get_async_session),
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user: User = Depends(current_active_user),
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):
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try:
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db_chat = await read_chat(chat_id, session, user)
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update_data = chat_update.model_dump(exclude_unset=True)
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for key, value in update_data.items():
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setattr(db_chat, key, value)
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await session.commit()
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await session.refresh(db_chat)
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return db_chat
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except HTTPException:
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raise
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except IntegrityError:
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await session.rollback()
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raise HTTPException(
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status_code=400,
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detail="Database constraint violation. Please check your input data.",
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) from None
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except OperationalError:
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await session.rollback()
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raise HTTPException(
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status_code=503, detail="Database operation failed. Please try again later."
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) from None
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except Exception:
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await session.rollback()
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raise HTTPException(
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status_code=500,
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detail="An unexpected error occurred while updating the chat.",
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) from None
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@router.delete("/chats/{chat_id}", response_model=dict)
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async def delete_chat(
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chat_id: int,
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session: AsyncSession = Depends(get_async_session),
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user: User = Depends(current_active_user),
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):
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try:
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db_chat = await read_chat(chat_id, session, user)
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await session.delete(db_chat)
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await session.commit()
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return {"message": "Chat deleted successfully"}
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except HTTPException:
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raise
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except IntegrityError:
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await session.rollback()
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raise HTTPException(
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status_code=400, detail="Cannot delete chat due to existing dependencies."
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) from None
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except OperationalError:
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await session.rollback()
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raise HTTPException(
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status_code=503, detail="Database operation failed. Please try again later."
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) from None
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except Exception:
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await session.rollback()
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raise HTTPException(
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status_code=500,
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detail="An unexpected error occurred while deleting the chat.",
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) from None
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