ics-parser.py

#!/usr/bin/env python
""" .ics parser

Usage:
  ics_parser.py [start_date] [end_date] <file>
"""

from icalendar import Calendar
from docopt import docopt


# In the lack of a strftime function on timedelta objects.
def strfdelta(delta):
    d = {'days': delta.days}
    d['hours'], rem = divmod(delta.seconds, 3600)
    d['minutes'], d['seconds'] = divmod(rem, 60)
    return '{0}:{1}'.format(d['hours'], d['minutes'])


def parse_ics(ics):
    data = open(ics, 'rb')
    cal = Calendar.from_ical(data.read())

    for component in cal.walk():
        if component.name == 'VEVENT':
            summary = component.get('summary')
            start = component.get('dtstart').dt
            end = component.get('dtend').dt
            duration = end - start
            str_duration = strfdelta(duration)
            print '{0}: {1} - {2}'.format(start.date().strftime('%d/%m-%y'),
                                          start.time().strftime('%H:%M'),
                                          end.time().strftime('%H:%M'))
            print u'{0} ({1})'.format(summary, str_duration)
            print '-' * (len(summary) + len(str_duration) + 3)
            print component.get('description')
            print ''

    data.close()


if __name__ == '__main__':
    arguments = docopt(__doc__, version='ics-parser v0.1')
    parse_ics(arguments['<file>'])