doris_mcp_server/utils/datetime_utils.py

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"""Timezone-aware UTC helpers used by runtime state and wire timestamps."""

from datetime import UTC, datetime


def utc_now() -> datetime:
    """Return the current time as a timezone-aware UTC datetime."""
    return datetime.now(UTC)


def as_utc(value: datetime) -> datetime:
    """Normalize aware or legacy-naive UTC values to aware UTC."""
    if value.tzinfo is None:
        return value.replace(tzinfo=UTC)
    return value.astimezone(UTC)


def format_rfc3339(value: datetime) -> str:
    """Serialize a datetime as an RFC 3339 UTC timestamp ending in ``Z``."""
    return as_utc(value).isoformat().replace("+00:00", "Z")