api.py

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"""Library for working with CalDAV api."""
 
import caldav
 
from homeassistant.core import HomeAssistant
 
 
async def async_get_calendars(
    hass: HomeAssistant, client: caldav.DAVClient, component: str
) -> list[caldav.Calendar]:
    """Get all calendars that support the specified component."""
 
    def _get_calendars() -> list[caldav.Calendar]:
        return [
            calendar
            for calendar in client.principal().calendars()
            if component in calendar.get_supported_components()
        ]
 
    return await hass.async_add_executor_job(_get_calendars)
 
 
def get_attr_value(obj: caldav.CalendarObjectResource, attribute: str) -> str | None:
    """Return the value of the CalDav object attribute if defined."""
    if hasattr(obj, attribute):
        return getattr(obj, attribute).value
    return None