first commit

auth.py

@@ -0,0 +1,80 @@
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from sqlalchemy.orm import Session
+import os
+from database import get_db
+from models import User, UserRole
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+security = HTTPBearer()
+
+JWT_SECRET = os.environ.get('JWT_SECRET', 'your-secret-key')
+JWT_ALGORITHM = os.environ.get('JWT_ALGORITHM', 'HS256')
+ACCESS_TOKEN_EXPIRE_MINUTES = int(os.environ.get('ACCESS_TOKEN_EXPIRE_MINUTES', 30))
+
+def verify_password(plain_password, hashed_password):
+    return pwd_context.verify(plain_password, hashed_password)
+
+def get_password_hash(password):
+    return pwd_context.hash(password)
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(timezone.utc) + expires_delta
+    else:
+        expire = datetime.now(timezone.utc) + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, JWT_SECRET, algorithm=JWT_ALGORITHM)
+    return encoded_jwt
+
+def decode_token(token: str):
+    try:
+        payload = jwt.decode(token, JWT_SECRET, algorithms=[JWT_ALGORITHM])
+        return payload
+    except JWTError:
+        return None
+
+async def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    db: Session = Depends(get_db)
+) -> User:
+    token = credentials.credentials
+    payload = decode_token(token)
+    
+    if payload is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid authentication credentials",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    
+    user_id: str = payload.get("sub")
+    if user_id is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid authentication credentials",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    
+    user = db.query(User).filter(User.id == user_id).first()
+    if user is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    
+    return user
+
+async def get_current_admin_user(current_user: User = Depends(get_current_user)) -> User:
+    if current_user.role != UserRole.admin:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Not enough permissions"
+        )
+    return current_user