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from datetime import datetime, timedelta, timezone
from typing import Any
from uuid import uuid4
from jose import JWTError, jwt
from app.config import settings
# формирует JWT с claim'ами:
# sub (email или id пользователя),
# iat,
# exp,
# jti (случайный идентификатор),
# typ: "access",
# подписывает HS256 секретом из настроек;
def create_access_token(sub: str, ttl_min: int | None = None) -> str:
now = datetime.now(timezone.utc)
ttl = ttl_min if ttl_min is not None else settings.access_token_ttl_min
payload: dict[str, Any] = {
"sub": sub,
"iat": now,
"exp": now + timedelta(minutes=ttl),
"jti": uuid4().hex,
"typ": "access",
}
return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)
# decode_token(token) – декодирует и проверяет подпись/срок,
# при ошибке бросает `ValueError` с понятным сообщением.
def decode_token(token: str) -> dict[str, Any]:
try:
return jwt.decode(
token, settings.jwt_secret, algorithms=[settings.jwt_algorithm]
)
except JWTError as exc:
raise ValueError(f"Invalid token: {exc}") from exc