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from typing import Annotated
from fastapi import APIRouter, Depends
from fastapi.responses import JSONResponse
from sqlalchemy.orm import Session
from sse_starlette.sse import EventSourceResponse
from api.auth import check_user_authentication
from api.function import generate_streaming_completion
from api.router.user import user_dependency
from core.chat.bot_service import ChatCompletionService
from core.chat.chatstore import ChatStore
from db.database import get_db
from db.models import Session_Publisher
from langfuse.llama_index import LlamaIndexCallbackHandler
from service.dto import UserPromptRequest, BotResponse
from utils.utils import generate_uuid
router = APIRouter(tags=["Bot_General"])
db_dependency = Annotated[Session, Depends(get_db)]
def get_chat_store():
return ChatStore()
@router.post("/bot_general/new")
async def create_session_general(user: user_dependency):
auth_response = check_user_authentication(user)
if auth_response:
return auth_response
session_id = generate_uuid()
return {"session_id": session_id}
@router.get("/bot/{session_id}")
async def get_session_id(
user: user_dependency,
session_id: str,
chat_store: ChatStore = Depends(get_chat_store),
):
auth_response = check_user_authentication(user)
if auth_response:
return auth_response
# Retrieve chat history from Redis
chat_history = chat_store.get_messages(session_id)
# If no chat history is found in Redis, fallback to the alternative store using mongoDB
if chat_history is None or chat_history == []:
chat_history = chat_store.get_all_messages_mongodb(session_id)
return chat_history
@router.post("/bot/{session_id}")
async def bot_generator_general(
user: user_dependency,session_id: str, user_prompt_request: UserPromptRequest
):
auth_response = check_user_authentication(user)
if auth_response:
return auth_response
langfuse_callback_handler = LlamaIndexCallbackHandler()
langfuse_callback_handler.set_trace_params(user_id="guest", session_id=session_id)
if user_prompt_request.streaming:
return EventSourceResponse(
generate_streaming_completion(user_prompt_request.prompt, session_id)
)
else:
bot_service = ChatCompletionService(session_id, user_prompt_request.prompt)
response, metadata, scores = bot_service.generate_completion()
return BotResponse(
content=response,
metadata=metadata,
scores=scores,
)
@router.delete("/bot/{session_id}")
async def delete_bot(
user: user_dependency,db: db_dependency, session_id: str, chat_store: ChatStore = Depends(get_chat_store)
):
auth_response = check_user_authentication(user)
if auth_response:
return auth_response
try:
chat_store.delete_messages(session_id)
# Delete session from database
session = (
db.query(Session_Publisher)
.filter(Session_Publisher.id == session_id)
.first()
)
if session:
db.delete(session)
db.commit() # Commit the transaction
else:
return JSONResponse(status_code=404, content="Session not found")
return {"info": f"Delete {session_id} successful"}
except Exception as e:
# Log the error and return JSONResponse for FastAPI
print(f"An error occurred in update data.: {e}")
return JSONResponse(status_code=400, content="the error when deleting message")
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