#! /bin/sh

#   mail-calendar - send information about historical dates
#   Copyright (c) 2002,3  Martin Schulze <joey@infodrom.org>
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA

#   http://cvs.infodrom.org/calendar/mail-calendar?cvsroot=infodrom
#   :pserver:anonymous@cvs.infodrom.org:/var/cvs/infodrom co calendar/mail-calendar
#  
#   $Id$

opt_subject="Calendar for"
opt_dateform="%B %d"
opt_to=$LOGNAME
opt_advance=0

usage()
{
    echo "mail-calendar [-h|--help] [-l|--lang locale] [-t|--to addr] [-a|--advance days]"
}

# Parse arguments
while [ $# -gt 0 ]
do
    case $1 in
    -h|--help)
	usage
	exit
	;;
    -l|--lang)
	if [ $# -gt 1 ]
	then
	    opt_lang=$2
	    shift
	fi
	;;
    -t|--to)
	if [ $# -gt 1 ]
	then
	    opt_to=$2
	    shift
	fi
	;;
    -a|--advance)
	if [ $# -gt 1 ]
	then
	    opt_advance=$2
	    shift
	fi
	;;
    esac
    shift
done

# Add support for non-english languages/locales
case $opt_lang in
de_DE)
	opt_subject="Kalender für den"
	opt_dateform="%d. %B"
esac

secs=$[ $opt_advance * 86400 ]

c_date=`date -d now+${secs}seconds +%d.%m`
s_date=`LANG=$opt_lang date -d now+${secs}seconds "+$opt_dateform"`

tmp=`tempfile`
trap 'rm -f $tmp' INT EXIT

calendar -l 0 -w 0 -t $c_date > $tmp

if [ -s $tmp ]
then
    (
	echo "Subject: $opt_subject $s_date"
	echo "To: $opt_to"
	echo
	calendar -l 0 -w 0 -t $c_date
    ) | /usr/sbin/sendmail "$opt_to"
fi