#!/bin/bash

# Adds an email address rule to the email configuration

# License
# =======
#
# Copyright (C) 2015 Bob Mottram <bob@robotics.uk.to>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

MYUSERNAME=$USER
EMAILADDRESS=
MAILINGLIST=

function show_help {
    echo ''
    echo 'freedombone-addemail -u [username] -e [email address] -l [mailing list name]'
    echo ''
	exit 0
}

while [[ $# > 1 ]]
do
key="$1"

case $key in
    -h|--help)
    show_help
    ;;
    -u|--user)
    shift
    MYUSERNAME="$1"
    ;;
    -e|--email)
    shift
    EMAILADDRESS="$1"
    ;;
    -l|--list)
    shift
    MAILINGLIST="$1"
    ;;
    *)
    # unknown option
    ;;
esac
shift
done

if ! [[ $MYUSERNAME && $EMAILADDRESS && $MAILINGLIST ]]; then
    show_help
fi

MUTTRC=/home/$MYUSERNAME/.muttrc
PM=/home/$MYUSERNAME/.procmailrc
LISTDIR=/home/$MYUSERNAME/Maildir/$MAILINGLIST

if [ ! -d "$LISTDIR" ]; then
    mkdir -m 700 $LISTDIR
    mkdir -m 700 $LISTDIR/tmp
    mkdir -m 700 $LISTDIR/new
    mkdir -m 700 $LISTDIR/cur
fi
chown -R $MYUSERNAME:$MYUSERNAME $LISTDIR
if ! grep -q "From: $EMAILADDRESS" $PM; then
    echo "# Email rule for $EMAILADDRESS -> $MAILINGLIST" >> $PM
    echo ":0" >> $PM
    echo "  * ^From: $EMAILADDRESS" >> $PM
    echo "$LISTDIR/new" >> $PM
    echo "# End of rule" >> $PM
    chown $MYUSERNAME:$MYUSERNAME $PM
fi
if [ ! -f "$MUTTRC" ]; then
  cp /etc/Muttrc $MUTTRC
  chown $MYUSERNAME:$MYUSERNAME $MUTTRC
fi
PROCMAILLOG=/home/$MYUSERNAME/log
if [ ! -d $PROCMAILLOG ]; then
  mkdir $PROCMAILLOG
  chown -R $MYUSERNAME:$MYUSERNAME $PROCMAILLOG
fi
MUTT_MAILBOXES=$(grep "mailboxes =" $MUTTRC)
if [[ $MUTT_MAILBOXES != *$MAILINGLIST* ]]; then
  if ! grep -q "=$MAILINGLIST" $MUTTRC; then
    sed -i "s|$MUTT_MAILBOXES|$MUTT_MAILBOXES =$MAILINGLIST|g" $MUTTRC
    chown $MYUSERNAME:$MYUSERNAME $MUTTRC
  fi
fi

exit 0