www/tools/merge_cals.py

#!/usr/bin/env python3

from glob import glob

import pytz
import icalendar


cals = []
merged = icalendar.Calendar()
merged.add('prodid', '-//CCCB Calendar Generator//berlin.ccc.de//')
merged.add('version', '2.0')

for icsfilestr in glob('public/*/**/*.ics', recursive=True):
	with open(icsfilestr, 'r') as icsfile:
		print('Importing', icsfilestr)
		cals.append(icalendar.Calendar.from_ical(icsfile.read()))

for cal in cals:
	for e in cal.subcomponents:
		merged.add_component(e)

outfile = 'static/all.ics'
with open(outfile, 'wb') as f:
	print(f'writing to {outfile}...')
	f.write(merged.to_ical())