343 lines
10 KiB
Python
343 lines
10 KiB
Python
import logging
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from fastapi import FastAPI, HTTPException, Depends, status
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from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
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from pymongo import MongoClient
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from bson import ObjectId
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from pydantic import BaseModel, Field
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from typing import List, Optional
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from datetime import datetime, timedelta
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from fastapi.encoders import jsonable_encoder
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# JWT Configuration
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SECRET_KEY = "YOUR_SECRET_KEY" # Replace with a secure secret key
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 30
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# Configure logging
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logging.basicConfig(level=logging.DEBUG,
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format='%(asctime)s - %(levelname)s - %(message)s')
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logger = logging.getLogger(__name__)
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app = FastAPI()
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logger.debug("FastAPI application initialized")
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# MongoDB connection
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client = MongoClient("mongodb://localhost:27017")
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db = client["pos_system"]
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logger.debug("MongoDB connection established")
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# Password hashing
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# OAuth2 scheme
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
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# Models
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class Item(BaseModel):
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name: str
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price: float
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quantity: int
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unit: str
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related_items: List[str] = []
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class Deal(BaseModel):
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name: str
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items: List[str]
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discount: float
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class OrderItem(BaseModel):
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item_id: str
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quantity: int
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class Order(BaseModel):
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customer_name: str
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items: List[OrderItem]
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total_amount: float
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payment_method: str
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date: str
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voucher: Optional[str] = None
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class User(BaseModel):
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username: str
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email: str
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full_name: str
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disabled: Optional[bool] = None
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class UserInDB(User):
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hashed_password: str
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class Token(BaseModel):
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access_token: str
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token_type: str
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class TokenData(BaseModel):
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username: Optional[str] = None
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logger.debug("Data models defined")
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# Helper functions
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def verify_password(plain_password, hashed_password):
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password):
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return pwd_context.hash(password)
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def get_user(username: str):
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user_dict = db.users.find_one({"username": username})
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if user_dict:
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return UserInDB(**user_dict)
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def authenticate_user(username: str, password: str):
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user = get_user(username)
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if not user:
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return False
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if not verify_password(password, user.hashed_password):
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return False
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return user
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.now(datetime.UTC) + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=15)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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async def get_current_user(token: str = Depends(oauth2_scheme)):
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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username: str = payload.get("sub")
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if username is None:
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raise credentials_exception
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token_data = TokenData(username=username)
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except JWTError:
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raise credentials_exception
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user = get_user(username=token_data.username)
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if user is None:
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raise credentials_exception
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return user
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async def get_current_active_user(current_user: User = Depends(get_current_user)):
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if current_user.disabled:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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# API Routes
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# User Management
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@app.post("/users/", response_model=User)
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async def create_user(user: UserInDB):
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hashed_password = get_password_hash(user.hashed_password)
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user_dict = user.dict()
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user_dict["hashed_password"] = hashed_password
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result = db.users.insert_one(user_dict)
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user_dict["_id"] = str(result.inserted_id)
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return User(**user_dict)
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@app.post("/token", response_model=Token)
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async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
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user = authenticate_user(form_data.username, form_data.password)
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if not user:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Incorrect username or password",
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headers={"WWW-Authenticate": "Bearer"},
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)
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access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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access_token = create_access_token(
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data={"sub": user.username}, expires_delta=access_token_expires
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)
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return {"access_token": access_token, "token_type": "bearer"}
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@app.get("/users/me/", response_model=User)
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async def read_users_me(current_user: User = Depends(get_current_active_user)):
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return current_user
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# Order Management
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@app.post("/orders/")
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async def create_order(order: Order, current_user: User = Depends(get_current_active_user)):
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logger.debug(f"Received request to create order: {order}")
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order_dict = order.dict()
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order_dict["user"] = current_user.username
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result = db.orders.insert_one(order_dict)
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logger.debug(f"Order created with ID: {result.inserted_id}")
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return {"id": str(result.inserted_id)}
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@app.get("/orders/")
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async def read_orders(current_user: User = Depends(get_current_active_user)):
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logger.debug("Received request to read all orders")
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orders = list(db.orders.find({"user": current_user.username}))
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logger.debug(f"Retrieved {len(orders)} orders")
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return orders
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@app.get("/orders/{order_id}")
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async def read_order(order_id: str, current_user: User = Depends(get_current_active_user)):
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logger.debug(f"Received request to read order with ID: {order_id}")
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order = db.orders.find_one(
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{"_id": ObjectId(order_id), "user": current_user.username})
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if order:
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logger.debug(f"Order found: {order}")
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return order
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logger.warning(f"Order with ID {order_id} not found")
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raise HTTPException(status_code=404, detail="Order not found")
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@app.put("/orders/{order_id}")
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async def update_order(order_id: str, order: Order, current_user: User = Depends(get_current_active_user)):
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logger.debug(f"Received request to update order with ID: {order_id}")
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result = db.orders.update_one(
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{"_id": ObjectId(order_id), "user": current_user.username},
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{"$set": order.dict()}
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)
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if result.modified_count:
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logger.debug(f"Order with ID {order_id} updated successfully")
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return {"message": "Order updated successfully"}
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logger.warning(f"Order with ID {order_id} not found for update")
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raise HTTPException(status_code=404, detail="Order not found")
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@app.delete("/orders/{order_id}")
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async def delete_order(order_id: str, current_user: User = Depends(get_current_active_user)):
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logger.debug(f"Received request to delete order with ID: {order_id}")
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result = db.orders.delete_one(
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{"_id": ObjectId(order_id), "user": current_user.username})
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if result.deleted_count:
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logger.debug(f"Order with ID {order_id} deleted successfully")
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return {"message": "Order deleted successfully"}
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logger.warning(f"Order with ID {order_id} not found for deletion")
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raise HTTPException(status_code=404, detail="Order not found")
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@app.post("/items/")
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async def create_item(item: Item):
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logger.debug(f"Received request to create item: {item}")
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result = db.items.insert_one(item.dict())
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logger.debug(f"Item created with ID: {result.inserted_id}")
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return {"id": str(result.inserted_id)}
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class PyObjectId(ObjectId):
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@classmethod
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def __get_validators__(cls):
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yield cls.validate
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@classmethod
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def validate(cls, v):
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if not ObjectId.is_valid(v):
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raise ValueError("Invalid objectid")
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return ObjectId(v)
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@classmethod
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def __modify_schema__(cls, field_schema):
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field_schema.update(type="string")
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def serialize_item(item):
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return {
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"id": str(item["_id"]),
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"name": item["name"],
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"price": item["price"],
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"quantity": item["quantity"],
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"unit": item["unit"],
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"related_items": item.get("related_items", [])
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}
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@app.get("/items/")
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async def read_items():
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logger.debug("Received request to read all items")
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items = list(db.items.find())
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logger.debug(f"Retrieved {len(items)} items")
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serialized_items = [serialize_item(item) for item in items]
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return serialized_items
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@app.get("/items/{item_id}")
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async def read_item(item_id: str):
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logger.debug(f"Received request to read item with ID: {item_id}")
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item = db.items.find_one({"_id": ObjectId(item_id)})
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if item:
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logger.debug(f"Item found: {item}")
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return item
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logger.warning(f"Item with ID {item_id} not found")
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raise HTTPException(status_code=404, detail="Item not found")
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@app.put("/items/{item_id}")
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async def update_item(item_id: str, item: Item):
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logger.debug(f"Received request to update item with ID: {item_id}")
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result = db.items.update_one(
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{"_id": ObjectId(item_id)}, {"$set": item.dict()})
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if result.modified_count:
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logger.debug(f"Item with ID {item_id} updated successfully")
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return {"message": "Item updated successfully"}
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logger.warning(f"Item with ID {item_id} not found for update")
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raise HTTPException(status_code=404, detail="Item not found")
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@app.delete("/items/{item_id}")
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async def delete_item(item_id: str):
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logger.debug(f"Received request to delete item with ID: {item_id}")
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result = db.items.delete_one({"_id": ObjectId(item_id)})
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if result.deleted_count:
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logger.debug(f"Item with ID {item_id} deleted successfully")
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return {"message": "Item deleted successfully"}
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logger.warning(f"Item with ID {item_id} not found for deletion")
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raise HTTPException(status_code=404, detail="Item not found")
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@app.get("/inventory/")
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async def get_inventory():
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logger.debug("Received request to get inventory")
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inventory = list(db.items.find({}, {"name": 1, "quantity": 1}))
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logger.debug(f"Retrieved inventory with {len(inventory)} items")
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return inventory
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@app.get("/sales/")
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async def get_sales_data():
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# Implement aggregation for sales data
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# This could include total sales, popular items, etc.
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pass
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if __name__ == "__main__":
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logger.info("Starting the FastAPI application")
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import uvicorn
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uvicorn.run(app, host="0.0.0.0", port=8000)
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