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import sys
import traceback
from datetime import date, datetime, timedelta, time
from io import BytesIO
import requests
import recurring_ical_events
from icalendar import Calendar
from pytz import all_timezones, timezone, utc
from tzlocal import get_localzone
MIDNIGHT = time(0, 0, 0)
def org_datetime(dt, tz):
'''Timezone aware datetime to YYYY-MM-DD DayofWeek HH:MM str in localtime.
'''
return dt.astimezone(tz).strftime("<%Y-%m-%d %a %H:%M>")
def org_date(dt, tz):
'''Timezone aware date to YYYY-MM-DD DayofWeek in localtime.
'''
if hasattr(dt, "astimezone"):
dt = dt.astimezone(tz)
return dt.strftime("<%Y-%m-%d %a>")
def event_is_declined(comp, emails):
attendee_list = comp.get('ATTENDEE', None)
if attendee_list:
if not isinstance(attendee_list, list):
attendee_list = [attendee_list]
for att in attendee_list:
if att.params.get('PARTSTAT', '') == 'DECLINED' and att.params.get('CN', '') in emails:
return True
return False
class IcalError(Exception):
pass
class Convertor():
RECUR_TAG = ":RECURRING:"
# Do not change anything below
def __init__(self, days=90, tz=None, emails=[], include_location=True, continue_on_error=False):
"""
days: Window length in days (left & right from current time). Has
to be positive.
tz: timezone. If None, use local timezone.
emails: list of user email addresses (to deal with declined events)
"""
self.emails = set(emails)
self.tz = timezone(tz) if tz else get_localzone()
self.days = days
self.include_location = include_location
self.continue_on_error = continue_on_error
def __call__(self, ics_file, org_file):
try:
cal = Calendar.from_ical(ics_file.read())
except ValueError as e:
msg = "Parsing error: {}".format(e)
raise IcalError(msg)
now = datetime.now(utc)
start = now - timedelta(days=self.days)
end = now + timedelta(days=self.days)
for comp in recurring_ical_events.of(
cal, keep_recurrence_attributes=True
).between(start, end):
if event_is_declined(comp, self.emails):
continue
try:
org_file.write(self.create_entry(comp))
except Exception:
print("Exception when processing:\n", file=sys.stderr)
print(comp.to_ical().decode('utf-8') + "\n", file=sys.stderr)
if self.continue_on_error:
print(traceback.format_exc(), file=sys.stderr)
else:
raise
def create_entry(self, comp):
output = []
# dates ----------------------------------------------------------------------------------
# Get start/end/duration
ev_start = None
ev_end = None
duration = None
if "DTSTART" in comp:
ev_start = comp["DTSTART"].dt
if "DTEND" in comp:
ev_end = comp["DTEND"].dt
if ev_start is not None:
duration = ev_end - ev_start
elif "DURATION" in comp:
duration = comp["DURATION"].dt
if ev_start is not None:
ev_end = ev_start + duration
# Special case for some calendars that include times at midnight for
# whole day events
if isinstance(ev_start, datetime) and isinstance(ev_end, datetime):
if ev_start.time() == MIDNIGHT and ev_end.time() == MIDNIGHT:
ev_start = ev_start.date()
ev_end = ev_end.date()
# Format date/time appropriately
if isinstance(ev_start, datetime):
# Normal event with start and end
output.append("* {}--{} ".format(
org_datetime(ev_start, self.tz), org_datetime(ev_end, self.tz)
))
elif isinstance(ev_start, date):
if ev_start == ev_end - timedelta(days=1):
# single day eventgg
output.append("* {} ".format(org_date(ev_start, self.tz)))
else:
# multiple day event
output.append(
"* {}--{}".format(
org_date(ev_start, self.tz),
org_date(ev_end - timedelta(days=1), self.tz),
))
# summary --------------------------------------------------------------------------------
summary = None
if "SUMMARY" in comp:
summary = comp['SUMMARY'].to_ical().decode("utf-8")
summary = summary.replace('\\,', ',')
location = None
if "LOCATION" in comp:
location = comp['LOCATION'].to_ical().decode("utf-8")
location = location.replace('\\,', ',')
if not any((summary, location)):
summary = u"(No title)"
else:
summary += " @ " + location if location and self.include_location else ''
rec_event = "RRULE" in comp
description = None
if 'DESCRIPTION' in comp:
description = '\n'.join(comp['DESCRIPTION'].to_ical()
.decode("utf-8").split('\\n'))
description = description.replace('\\,', ',')
output.append(u"{}".format(summary))
output.append(u"\n")
return ''.join(output)
def check_timezone(ctx, param, value):
if (value is None) or (value in all_timezones):
return value
click.echo(u"Invalid timezone value {value}.".format(value=value))
click.echo(u"Use --print-timezones to show acceptable values.")
ctx.exit(1)
def print_timezones(ctx, param, value):
if not value or ctx.resilient_parsing:
return
for tz in all_timezones:
click.echo(tz)
ctx.exit()
if __name__ == "__main__":
url = "https://outlook.office365.com/owa/calendar/db2d3e0f0490459a80c4b837118e4bf1@wisc.edu/f6a2b5209cd6432c96f52939cacdbedd2266851683387467601/calendar.ics"
r = requests.get(url)
convertor = Convertor(tz="America/Chicago")
with open("/home/nginx/org/uw-madison.org", "w") as f:
convertor(BytesIO(r.content), f)
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