copied the code from the working repo

mtucijobsbackend/app/security.py

@@ -0,0 +1,90 @@
+from jose import JWTError, jwt
+from datetime import datetime, timedelta
+from . import schemas, database, models
+from fastapi import Depends, status, HTTPException, Security
+from fastapi.security import OAuth2PasswordBearer, APIKeyHeader
+from sqlalchemy.orm import Session
+from .config import settings
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl='login')
+header_scheme = APIKeyHeader(name="X-API-KEY")
+
+SECRET_KEY = settings.secret_key2
+ALGORITHM = settings.algorithm
+ACCESS_TOKEN_EXPIRE_MINUTES = settings.access_token_expire_minutes
+REFRESH_TOKEN_EXPIRE_DAYS = settings.refresh_token_expire_days
+X_API_KEY = settings.x_api_key
+
+def verify_api_key(api_key_header: str = Security(header_scheme)):
+    if api_key_header == X_API_KEY:
+        return {"status": "OK"}
+    raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED)
+
+def create_access_token(data: dict):
+    to_encode = data.copy()
+
+    expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    to_encode.update(
+        {"type": "access"})
+    to_encode.update(
+        {"exp": expire})  
+
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+
+    return encoded_jwt
+
+def create_refresh_token(data: dict):
+    to_encode = data.copy()
+
+    expire = datetime.utcnow() + timedelta(days=REFRESH_TOKEN_EXPIRE_DAYS)
+    to_encode.update(
+        {"type": "refresh"})
+    to_encode.update(
+        {"exp": expire})        
+
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+
+    return encoded_jwt
+
+def decode_and_verify_token(token: str, expected_type: str):
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        token_type: str = payload.get("type")
+        if token_type != expected_type:
+            raise HTTPException(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                detail=f"Invalid token type: expected {expected_type}, got {token_type}")
+    except JWTError:
+        raise credentials_exception
+
+    return payload
+
+
+def verify_access_token(access_token: str = Depends(oauth2_scheme)):
+    payload = decode_and_verify_token(access_token, expected_type="access")
+    
+    user_id: str = payload.get("UserID")
+    email: str = payload.get("Email")
+    
+    token_data = schemas.TokenData(UserID=user_id, Email=email)
+    
+    return token_data
+
+def verify_refresh_token(refresh_token: str):
+    payload = decode_and_verify_token(refresh_token, expected_type="refresh")
+    
+    user_id: str = payload.get("UserID")
+
+    return user_id
+
+
+def get_current_user(token_data: schemas.TokenData = Depends(verify_access_token), db: Session = Depends(database.get_db)):
+    user = db.query(models.Users).filter(models.Users.UserID == token_data.UserID).first()
+    if user is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+    return user