#!/bin/sh

# a1-mutt-calendar - run mutt-vcalendar-filter and mutt-ical to process ical VCALENDAR file on stdin

# This script is in the public domain

# Author: Joost van Baal-Ilić, january 2019

# maintained at git git.mdcc.cx ad1810-scripts/stuff

# Use this script to reply on a iCalendar aka VCALENDAR thingie.  Uses <a
# href='https://github.com/marvinthepa/mutt-ical'>mutt-ical</a> as currently
# maintained by Martin "marvinthepa" Sander.  It's about what is specified in
# "Internet Calendaring and Scheduling Core Object Specification (iCalendar)" @
# <a href='https://tools.ietf.org/html/rfc5545'>RFC 5545</a>

# See also: sudo apt install todoman (in debian buster/10 and 11/bullseye)

# Usage:
#  run mutt
#  open a message with a calendar invitation
#  press v to view attachments
#  scroll to the attachment which looks like e.g.:
#     I     4 └─><no description>   [text/calendar, base64, utf-8, 2,6K]
#  press | (pipe symbol)
#  when asked "Pipe to:" enter a1-mutt-calendar
#  see stuff fail hard since we lack a controlling tty/terminal

# bugs: even when called as
# joostvb@dijkstra:~% a1-mutt-calendar </tmp/cal
# it fails hard

# see git/ad1810-doc/debian/mutt-calendar.txt

# might want to use:
# DEBEMAIL
# USER
#
# not:
#
# MAIL=/var/mail/joostvb
# MAILCHECK=60
# MAILPATH=''

# run as e.g.:

# joostvb@dijkstra:~% a1-mutt-calendar /tmp/cal

set -e

#email=${EMAIL:-joostvb+calendar@uvt.nl} # jammer maar helaas
email=${EMAIL:-J.E.vanBaal@uvt.nl}

#mailtje=$(mktemp)
#trap 'rm -f -- "$tmp"' INT HUP TERM QUIT EXIT
#echo "$0: expecting .ics file, first line BEGIN:VCALENDAR, last line END:VCALENDAR on stdin"
#cat >$mailtje

mailtje=$1

#https://github.com/terabyte/mutt-filters
#joostvb@dijkstra:~/bin% ln -s ../git-ro/mutt-filters/vcalendar-filter mutt-vcalendar-filter

# sudo apt install libdata-ical-perl python-vobject
echo "$0: running mutt-vcalendar-filter"

mutt-vcalendar-filter <$mailtje

# patch this:
#        foreach my $key ( qw(summary BR description BR location organizer dtstart dtend) ) {
# we want to parse this too:
# ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN=J.E. van B
#  aal:MAILTO:J.E.vanBaal@uvt.nl

# joostvb@dijkstra:~/git-ro% git clone https://github.com/marvinthepa/mutt-ical.git
# joostvb@dijkstra:~/bin% ln -s ../git-ro/mutt-ical/mutt-ical.py mutt-ical

echo "$0: running mutt-ical interactively, using $email as sender address"
mutt-ical -i -e $email $mailtje

echo "$0: finished"


# чет,  9. феб 2023.  14:12:46 CET

# https://github.com/marvinthepa/mutt-ical/blob/master/mutt-ical.py

# root@banach:~# apt update && apt -V dist-upgrade python3-vobject

# joostvb@banach:~% mutt-ical.py -i -e j.e.vanbaal@tilburguniversity.edu /tmp/cal
# Accept Invitation? [Y]es/[n]o/[t]entative/[c]ancel
# Y
# Seems like you have not been invited to this event!
# joostvb@banach:~%
#
# joostvb@banach:~% mutt-ical.py -i -e 'J.E.vanBaal@tilburguniversity.edu' /tmp/cal
# Feb  9 14:15:45 banach postfix/smtp[4835]: 990261F351: to=<Jola.Prinsen@tilburguniversity.edu>, relay=mailhost-prdtnnng.uvt.nl[137.56.247.246]:25, delay=0.51, delays=0.01/0/0.04/0.47, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as A4787B9)