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fix icalparser for full-day events
[etc/mutt.git] / .config / mutt / icalparser
1 #!/usr/bin/python3
2
3 import sys
4 import os
5 from icalendar import Calendar, Event
6 from textwrap import fill, indent
7
8 FIELDS = ('summary','location','organiser',
9           'flags','uid','rrule')
10 COLSEP = ': '
11
12 COLUMNS = int(os.getenv('COLUMNS', 80))-10
13 WIDTH = max(len(i) for i in FIELDS)
14 INDENT = WIDTH + len(COLSEP)
15
16 def dtstrs(event):
17     start, end = event.get('dtstart').dt, event.get('dtend')
18     if not end:
19         duration = event.get('duration').dt
20         end = start + duration
21     else:
22         end = end.dt
23
24     def strftime(dt, strf):
25         return dt.astimezone().strftime(strf)
26
27     ret = []
28
29     try:
30         if start.tzinfo == end.tzinfo:
31             ret.append(strftime(start, '%F %R'))
32
33         else:
34             ret.append(strftime(start, '%F %R %Z'))
35
36         if start.date() == end.date():
37             ret.append(strftime(end, '%T %Z'))
38
39         else:
40             ret.append(strftime(end, '%F %R %Z'))
41
42         return ret
43
44     except AttributeError:
45         return map(lambda d: d.strftime('%F'), (start, end))
46
47 def parse_ics_file(fp):
48     cal = Calendar.from_ical(fp.read())
49
50     for event in cal.walk():
51         if event.name != "VEVENT": continue
52         print('{} → {}'.format(*dtstrs(event)))
53         flags = []
54         for k in ('status', 'class', 'transp', 'priority'):
55             t = event.get(k)
56             if t: flags.append((k, t))
57         event['flags'] = ' '.join('{}:{}'.format(*f) for f in flags)
58         for label in FIELDS:
59             if label in event:
60                 text = fill(str(event[label]), width=COLUMNS-INDENT,
61                             initial_indent='', subsequent_indent=' '*INDENT)
62                 print(f'{label.capitalize():>{WIDTH}s}{COLSEP}{text}')
63
64         if 'description' in event:
65             output = ['']
66             lines = event['description'].split('\n')
67             for line in lines:
68                 output.append(fill(line, width=COLUMNS, initial_indent=' ',
69                                    subsequent_indent=' '))
70             print('\n'.join(output))
71
72 if __name__ == '__main__':
73
74     if len(sys.argv) > 1 and sys.argv[1] != '-':
75         for f in sys.argv[1:]:
76             with open(f) as fp:
77                 parse_ics_file(fp)
78     else:
79         parse_ics_file(sys.stdin)