import re

ICAL_DATETIME_START = "DTSTART"
ICAL_DATETIME_END = "DTEND"
ICAL_DATETIME_STAMP = "DTSTAMP"
ICAL_SUMMARY = "SUMMARY"
ICAL_DESCRIPTION = "DESCRIPTION"
ICAL_ATTENDEE = "ATTENDEE"
ICAL_UID = "UID"
ICAL_RRULE = "RRULE"
ICAL_UNTIL = "UNTIL"
ICAL_LAST_MODIFIED = "LAST-MODIFIED"
ICAL_LOCATION = "LOCATION"
ICAL_STATUS = "STATUS"
ICAL_STATUS_CANCELLED = "CANCELLED"
ICAL_COMPONENT_VEVENT = "VEVENT"
RE_PRIORITY = re.compile(r"^\[L(\d+)\]")
RE_EVENT_UID_V1 = re.compile(r"amixr-([\w\d-]+)-U(\d+)-E(\d+)-S(\d+)")
RE_EVENT_UID_V2 = re.compile(r"oncall-([\w\d-]+)-PK([\w\d]+)-U(\d+)-E(\d+)-S(\d+)")

CALENDAR_TYPE_FINAL = "final"

EXPORT_WINDOW_DAYS_AFTER = 180
EXPORT_WINDOW_DAYS_BEFORE = 15