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from app.backend.controllers.messages import register_message
from app.core.document_validator import path_is_valid
from app.core.response_parser import add_links
from app.backend.models.users import User
from app.settings import BASE_DIR
from app.backend.controllers.chats import (
get_chat_with_messages,
create_new_chat,
update_title,
list_user_chats
)
from app.backend.controllers.users import (
extract_user_from_context,
get_current_user,
get_latest_chat,
refresh_cookie,
authorize_user,
check_cookie,
create_user
)
from app.core.utils import (
construct_collection_name,
create_collection,
extend_context,
initialize_rag,
save_documents,
protect_chat,
TextHandler,
PDFHandler,
)
from fastapi.templating import Jinja2Templates
from fastapi.staticfiles import StaticFiles
from fastapi.middleware.cors import CORSMiddleware
from fastapi import (
HTTPException,
UploadFile,
Request,
Depends,
FastAPI,
Form,
File,
)
from fastapi.responses import (
StreamingResponse,
RedirectResponse,
FileResponse,
JSONResponse,
)
from typing import Optional
import os
# <------------------------------------- API ------------------------------------->
api = FastAPI()
rag = initialize_rag()
origins = [
"*",
]
api.add_middleware(
CORSMiddleware,
allow_origins=origins,
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
api.mount(
"/chats_storage",
StaticFiles(directory=os.path.join(BASE_DIR, "chats_storage")),
name="chats_storage",
)
api.mount(
"/static",
StaticFiles(directory=os.path.join(BASE_DIR, "app", "frontend", "static")),
name="static",
)
templates = Jinja2Templates(
directory=os.path.join(BASE_DIR, "app", "frontend", "templates")
)
# <--------------------------------- Middleware --------------------------------->
@api.middleware("http")
async def require_user(request: Request, call_next):
print("&" * 40, "START MIDDLEWARE", "&" * 40)
try:
print(f"Path ----> {request.url.path}, Method ----> {request.method}, Port ----> {request.url.port}\n")
stripped_path = request.url.path.strip("/")
if (
stripped_path.startswith("pdfs")
or "static/styles.css" in stripped_path
or "favicon.ico" in stripped_path
):
return await call_next(request)
user = get_current_user(request)
authorized = True
if user is None:
authorized = False
user = create_user()
print(f"User in Context ----> {user.id}\n")
request.state.current_user = user
response = await call_next(request)
if authorized:
refresh_cookie(request=request, response=response)
else:
authorize_user(response, user)
return response
except Exception as exception:
raise exception
finally:
print("&" * 40, "END MIDDLEWARE", "&" * 40, "\n\n")
# <--------------------------------- Common routes --------------------------------->
@api.post("/message_with_docs")
async def send_message(
request: Request,
files: list[UploadFile] = File(None),
prompt: str = Form(...),
chat_id: str = Form(None),
) -> StreamingResponse:
status = 200
try:
user = extract_user_from_context(request)
print("-" * 100, "User ---->", user, "-" * 100, "\n\n")
collection_name = construct_collection_name(user, chat_id)
message_id = register_message(content=prompt, sender="user", chat_id=chat_id)
await save_documents(
collection_name, files=files, RAG=rag, user=user, chat_id=chat_id, message_id=message_id
)
return StreamingResponse(
rag.generate_response_stream(
collection_name=collection_name, user_prompt=prompt, stream=True
),
status,
media_type="text/event-stream",
)
except Exception as e:
print(e)
@api.post("/replace_message")
async def replace_message(request: Request):
data = await request.json()
with open(os.path.join(BASE_DIR, "response.txt"), "w") as f:
f.write(data.get("message", ""))
updated_message = data.get("message", "")
register_message(
content=updated_message, sender="system", chat_id=data.get("chatId")
)
return JSONResponse({"updated_message": updated_message})
@api.get("/viewer/{path:path}")
def show_document(
request: Request,
path: str,
page: Optional[int] = 1,
lines: Optional[str] = "1-1",
start: Optional[int] = 0,
):
print(f"DEBUG: Show document with path: {path}, page: {page}, lines: {lines}, start: {start}")
path = os.path.realpath(path)
print(f"DEBUG: Real path: {path}")
path = os.path.realpath(path)
if not path_is_valid(path):
return HTTPException(status_code=404, detail="Document not found")
ext = path.split(".")[-1]
if ext == "pdf":
print("Open pdf file by path")
return FileResponse(path=path)
elif ext in ("txt", "csv", "md", "json"):
print("Open txt file by path")
return TextHandler(request, path=path, lines=lines, templates=templates)
elif ext in ("docx", "doc"):
return TextHandler(
request, path=path, lines=lines, templates=templates
)
else:
return FileResponse(path=path)
# <--------------------------------- Get --------------------------------->
@api.get("/list_chats")
def list_chats_for_user(request: Request):
user = extract_user_from_context(request)
chats = list_user_chats(user.id)
print(f"Chats for user {user.id}: {chats}")
return JSONResponse({"chats": chats})
@api.get("/chats/{chat_id}")
def show_chat(request: Request, chat_id: str):
user = extract_user_from_context(request)
if not protect_chat(user, chat_id):
raise HTTPException(401, "Yod do not have rights to use this chat!")
chat_data = get_chat_with_messages(chat_id)
print(f"DEBUG: Data for chat '{chat_id}' from get_chat_with_messages: {chat_data}")
if not chat_data:
raise HTTPException(status_code=404, detail=f"Chat with id {chat_id} not found.")
update_title(chat_data["chat_id"])
return JSONResponse(content=chat_data)
@api.get("/")
def last_user_chat(request: Request):
user = extract_user_from_context(request)
chat = get_latest_chat(user)
if chat is None:
print("new_chat")
new_chat = create_new_chat("new chat", user)
url = new_chat.get("url")
try:
create_collection(user, new_chat.get("chat_id"), rag)
except Exception as e:
raise HTTPException(500, e)
else:
url = f"/chats/{chat.id}"
return RedirectResponse(url, status_code=303)
# <--------------------------------- Post --------------------------------->
@api.post("/new_chat")
def create_chat(request: Request, title: Optional[str] = "new chat"):
user = extract_user_from_context(request)
new_chat_data = create_new_chat(title, user)
if not new_chat_data.get("id"):
raise HTTPException(500, "New chat could not be created.")
create_collection(user, new_chat_data["id"], rag)
return JSONResponse(new_chat_data)
if __name__ == "__main__":
pass
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