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backend/core/auth.py

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+import logging
+from datetime import datetime, timedelta
+
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+
+from core.config import JWT_SECRET_KEY
+
+logger = logging.getLogger("app")
+
+SECRET_KEY = JWT_SECRET_KEY
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 30
+REFRESH_TOKEN_EXPIRE_DAYS = 30
+
+pwd_context = CryptContext(schemes=["bcrypt"])
+
+def hash_password(password: str) -> str:
+  return pwd_context.hash(password)
+
+def verify_password(plain: str, hashed: str) -> bool:
+  return pwd_context.verify(plain, hashed)
+
+def create_access_token(user_id: str) -> str:
+  expire = datetime.now() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+  return jwt.encode({"sub": user_id, "exp": expire, "type": "access"}, SECRET_KEY, algorithm=ALGORITHM)
+
+def create_refresh_token(user_id: str) -> str:
+  expire = datetime.now() + timedelta(days=REFRESH_TOKEN_EXPIRE_DAYS)
+  return jwt.encode({"sub": user_id, "exp": expire, "type": "refresh"}, SECRET_KEY, algorithm=ALGORITHM)
+
+def decode_refresh_token(token: str) -> str | None:
+  try:
+    payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+    if payload.get("type") != "refresh":
+      return None
+    return payload.get("sub")
+  except JWTError:
+    return None
+
+def decode_access_token(token: str) -> str | None:
+  try:
+    payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+    if payload.get("type") != "access":
+      return None
+    return payload.get("sub")
+  except JWTError:
+    return None