135 lines
3.9 KiB
Python
135 lines
3.9 KiB
Python
from enum import Enum
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from backend.config import SECRET_KEY, ALGORITHM, ACCESS_TOKEN_EXPIRE_MINUTES
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from backend.config import pwd_context, get_session_db
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from datetime import datetime, timedelta, timezone
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from pydantic import BaseModel
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from fastapi import Depends, HTTPException
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from typing import Annotated, Optional
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from fastapi.security import OAuth2PasswordBearer
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from passlib.context import CryptContext
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import jwt
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from sqlmodel import SQLModel, Field, Session, select
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from pydantic.networks import EmailStr
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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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### ENUMS ###
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class Role(str, Enum):
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user = "user"
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admin = "admin"
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guest = "guest"
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mod = "mod"
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class Status(str, Enum):
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active = "active"
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banned = "banned"
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suspended = "suspended"
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### KULLANICI MODELLERİ ###
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class UserBase(SQLModel):
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username: Optional[str] = None
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user_id: Optional[int] = None
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role: Optional[Role] = None
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status: Optional[Status] = None
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class UserInDb(UserBase):
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hashed_password: str | None = None
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class UserPublic(UserBase):
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pass
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class UserCreate(BaseModel):
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username: Optional[str] = None
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role: Optional[Role] = None
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email : EmailStr | None = None
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status: Optional[Status] = None
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password : str | None = None
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### VERİTABANI MODELİ ###
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class DBUser(SQLModel, table=True):
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__tablename__ = "users" # opsiyonel, sqlmodel bunu otomatik de atar
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user_id: Optional[int] = Field(default=None, primary_key=True)
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username: str = Field(index=True, nullable=False)
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hashed_password: str = Field(nullable=False)
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role: Role = Field(default=Role.user)
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status: Status = Field(default=Status.active)
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### AUTH ###
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/login")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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return pwd_context.hash(password)
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def authenticate_user(
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session: Annotated[Session, Depends(get_session_db)],
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username: str,
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password: str
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) -> UserInDb | None:
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statement = select(DBUser).where(DBUser.username == username)
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result = session.exec(statement).first()
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if not result or not verify_password(password, result.hashed_password):
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return None
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return result
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def create_access_token(
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data: dict,
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expires_delta: Optional[timedelta] = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES),
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) -> str:
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to_encode = data.copy()
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expire = datetime.now(timezone.utc) + expires_delta
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm="HS256")
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return encoded_jwt
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async def get_user(
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session: Annotated[Session, Depends(get_session_db)],
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username: str
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) -> UserInDb | None:
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statement = select(DBUser).where(DBUser.username == username)
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result = session.exec(statement).first()
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return result
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async def get_current_user(
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token: Annotated[str, Depends(oauth2_scheme)],
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session: Annotated[Session, Depends(get_session_db)]
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) -> UserPublic:
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credentials_exception = HTTPException(
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status_code=401,
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detail="Invalid 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=["HS256"])
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username: Optional[str] = payload.get("sub")
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if username is None:
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raise credentials_exception
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except jwt.PyJWTError:
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raise credentials_exception
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user = await get_user(session, 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(
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current_user: Annotated[UserInDb, Depends(get_current_user)]
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) -> UserPublic:
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if current_user.status == Status.banned:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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