initial commit

app/dependencies.py

@@ -0,0 +1,60 @@
+from datetime import datetime, timedelta
+from typing import Optional
+
+from fastapi import HTTPException, Security, status, Depends
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from jose import jwt, JWTError
+from passlib.context import CryptContext
+from sqlalchemy.orm import Session
+
+from .config import settings
+from .db import get_db
+from .models import User, UserRole
+
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+security_scheme = HTTPBearer()
+
+
+def verify_password(plain_password: str, password_hash: str) -> bool:
+    return pwd_context.verify(plain_password, password_hash)
+
+
+def get_password_hash(password: str) -> str:
+    return pwd_context.hash(password)
+
+
+def create_access_token(subject: str, expires_delta: Optional[timedelta] = None) -> str:
+    if expires_delta is None:
+        expires_delta = timedelta(minutes=settings.access_token_expire_minutes)
+    expire = datetime.utcnow() + expires_delta
+    to_encode = {"sub": subject, "exp": expire}
+    encoded_jwt = jwt.encode(to_encode, settings.jwt_secret_key, algorithm=settings.jwt_algorithm)
+    return encoded_jwt
+
+
+def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Security(security_scheme),
+    db: Session = Depends(get_db),
+):
+    token = credentials.credentials
+    try:
+        payload = jwt.decode(token, settings.jwt_secret_key, algorithms=[settings.jwt_algorithm])
+        subject: str = payload.get("sub")
+        if subject is None:
+            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
+    except JWTError:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
+
+    user = db.query(User).filter(User.email == subject).first()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="User not found")
+    return user
+
+
+def require_admin(user: User = Depends(get_current_user)):
+    if user.role != UserRole.ADMIN:
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Admin only")
+    return user
+
+