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"""Library for parsing and encoding DATE values."""
from __future__ import annotations
import datetime
import logging
import re
from ical.parsing.property import ParsedProperty
from .data_types import DATA_TYPE
_LOGGER = logging.getLogger(__name__)
DATE_REGEX = re.compile(r"^([0-9]{8})$")
@DATA_TYPE.register("DATE", parse_order=1)
class DateEncoder:
"""Encode and decode an rfc5545 DATE and datetime.date."""
@classmethod
def __property_type__(cls) -> type:
return datetime.date
@classmethod
def __parse_property_value__(cls, prop: ParsedProperty) -> datetime.date | None:
"""Parse a rfc5545 into a datetime.date."""
if not (match := DATE_REGEX.fullmatch(prop.value)):
raise ValueError(f"Expected value to match DATE pattern: '{prop.value}'")
date_value = match.group(1)
year = int(date_value[0:4])
month = int(date_value[4:6])
day = int(date_value[6:])
result = datetime.date(year, month, day)
_LOGGER.debug("DateEncoder returned %s", result)
return result
@classmethod
def __encode_property_json__(cls, value: datetime.date) -> str:
"""Serialize as an ICS value."""
return value.strftime("%Y%m%d")
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