app.py

from fastapi import FastAPI, HTTPException, Request, Depends
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
import pymongo
from bson.objectid import ObjectId

# Khởi tạo FastAPI app và cho phép CORS
app = FastAPI()

origins = [
    "*"  # Cho phép tất cả origin, bạn nên thay đổi trong môi trường production
]

app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# MongoDB connection   

mongo_url = "mongodb+srv://ip6ofme:JL1S4hjMWRoko8AJ@cluster0.x0vo0.mongodb.net/"
client = pymongo.MongoClient(mongo_url)
db = client["test"]
pdf_collection = db["PdfDetails"]
voter_collection = db["Voters"]

# Pydantic models để validate dữ liệu
class PDF(BaseModel):
    title: str
    group: str
    url: str

class Vote(BaseModel):
    id: str

class Voter(BaseModel):
    name: str
    group: str

class VoteByVoter(BaseModel):
    voter_id: str
    file_id: str

# API để upload file và lưu thông tin vào MongoDB
@app.post("/upload-files")
async def upload_file(pdf: PDF):
    new_pdf = {
        "title": pdf.title,
        "group": pdf.group,
        "url": pdf.url,
        "votes": 0
    }
    result = pdf_collection.insert_one(new_pdf)
    return {"status": "ok", "id": str(result.inserted_id)}

# API để tăng số lượng vote của file dựa trên ID
@app.post("/vote")
async def vote(vote: Vote):
    try:
        file = pdf_collection.find_one({"_id": ObjectId(vote.id)})
        if not file:
            raise HTTPException(status_code=404, detail="File not found")

        pdf_collection.update_one({"_id": ObjectId(vote.id)}, {"$inc": {"votes": 1}})
        return {"status": "ok"}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

# API để lấy số lượng votes của file theo ID
@app.get("/get-votes")
async def get_votes(id: str):
    try:
        file = pdf_collection.find_one({"_id": ObjectId(id)})
        if not file:
            raise HTTPException(status_code=404, detail="File not found")

        return {"status": "ok", "votes": file.get("votes", 0)}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

# API để lấy danh sách tất cả các file
@app.get("/get-files")
async def get_files():
    try:
        files = pdf_collection.find({})
        file_list = []
        for file in files:
            file_list.append({
                "id": str(file["_id"]),
                "title": file["title"],
                "group": file["group"],
                "url": file["url"],
                "votes": file.get("votes", 0)
            })
        return {"status": "ok", "data": file_list}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

# API mới để đăng ký người bình chọn
@app.post("/register-voter")
async def register_voter(voter: Voter):
    new_voter = {
        "name": voter.name,
        "group": voter.group,
        "number_of_votes": 0
    }
    result = voter_collection.insert_one(new_voter)
    return {"status": "ok", "id": str(result.inserted_id)}

# API mới để bình chọn
@app.post("/vote-by-voter")
async def vote_by_voter(vote: VoteByVoter):
    voter = voter_collection.find_one({"_id": ObjectId(vote.voter_id)})
    if not voter:
        raise HTTPException(status_code=404, detail="Voter not found")

    if voter["number_of_votes"] >= 5:
        raise HTTPException(status_code=400, detail="Maximum votes reached")

    # Tăng số lượt bình chọn của người dùng
    voter_collection.update_one({"_id": ObjectId(vote.voter_id)}, {"$inc": {"number_of_votes": 1}})

    # Tăng số lượt bình chọn cho file
    pdf_collection.update_one({"_id": ObjectId(vote.file_id)}, {"$inc": {"votes": 1}})

    return {"status": "ok", "message": "Vote recorded successfully"}

# API để lấy thông tin người bình chọn
@app.get("/get-voter")
async def get_voter(id: str):
    voter = voter_collection.find_one({"_id": ObjectId(id)})
    if not voter:
        raise HTTPException(status_code=404, detail="Voter not found")
    return {
        "status": "ok",
        "name": voter["name"],
        "group": voter["group"],
        "number_of_votes": voter["number_of_votes"]
    }

# Khởi chạy server
if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=7860)