#!/bin/bash

# Company:  PowerCraft Technology
# Author:   Copyright Jelle de Jong <jelledejong@powercraft.nl>
# Note:     Please send me an email if you enhanced the script
# Date:     2008-11-22 / ... / 2009-01-26 / 2009-02-04 / 2009-06-13

# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.

TEXTDOMAINDIR=/usr/share/locale
TEXTDOMAIN=pct-support-chat

SYSCONF="/etc/pct-support-scripts.conf"
SYSDIR="/etc/pct-support-scripts.conf.d/"

version="0.1.6"
author="Jelle de Jong <jelledejong@powercraft.nl>"
donation="http://www.tuxcrafter.net/pages/contact.html#paypal-donation"
homepage="https://secure.powercraft.nl/svn/packages/trunk/source/pct-support-scripts/"
licence="http://www.gnu.org/licenses/gpl-3.0.html"

unset NICKNAME
unset ADMIN
unset SERVER
unset CONFIG

function version()
{
    echo $"Usage:    $0 --help"
    echo $"Version:  $version"
    echo $"Author:   $author"
    echo $"Donation: $donation"
    echo $"Homepage: $homepage"
    echo $"Licence:  $licence"
}

function usage()
{
    echo "Program to start an irc chat support session"
    echo
    echo "Usage:    $0 [options]"
    echo
    echo "Options:"
    echo "  -n, --nick ...   nickname for user asking help"
    echo "  -a, --admin ...  admin to contact for asking help"
    echo "  -s, --server ... server to contact for help"
    echo "  -c, --config ... name of id-string used in configuration file"
    echo "  -h, --help, -?   show this help information"
    echo "  -v, --version    show the version and author information"
    echo
    echo "Example:"
    echo "  pct-support-chat"
    echo "  pct-support-chat -n nick12345 -a tuxcrafter -s chat.freenode.net"
    echo "  pct-support-chat --nick nick12345 --admin tuxcrafter --server chat.freenode.net"
    echo "  pct-support-chat --config config1"
    echo
    echo "  The irssi program can be closed by typing /quit and press [enter]"
    echo "  or you may just close the window when you wish"
    echo
    echo "Configuration:"
    echo "  $SYSCONF"
    echo "  $SYSDIR"
    echo
    echo "  In the configuration files the default nick, admin and server"
    echo "  can be set. Pleae look inside the files to get a better idea"
    echo "  of how to configure them. The --config option can be used to"
    echo "  select additional configurations. For example using"
    echo "  --config config1 will use the section [config1]."
    echo
    echo "  This program may be used to start an irc chat session to ask"
    echo "  for help. Also take a look at the pct-support-login program to"
    echo "  start a vnc support session to allow an admin to help you with"
    echo "  grapical applications. It can be used with any irc contact"
    echo "  person, just configure the config file"
    echo
    echo "Website:"
    echo "  https://secure.powercraft.nl/svn/packages/"
    echo "Mailinglist:"
    echo "  http://www.powercraft.nl/cgi-bin/mailman/listinfo/packages-commit"
    echo "  http://www.powercraft.nl/cgi-bin/mailman/listinfo/packages-devel"
}

while [[ "$1" == -* ]]; do
    case "$1" in
        -h|--help|-\?) usage; exit 0;;
        -n|--nick) NICKNAME="$2"; shift; shift;;
        -a|--admin) ADMIN="$2"; shift; shift;;
        -s|--server) SERVER="$2"; shift; shift;;
        -c|--config) CONFIG="$2"; shift; shift;;
        -v|--version) version; exit 0;;
        --) shift; break;;
        -*) echo 1>&2 $"invalid option: $1"; usage; exit 1;;
    esac
done

function scan_configuration()
{
    file="$1"
    unset options

    [ ! -z "$NICKNAME" ] && options+=("NICKNAME")
    [ ! -z "$ADMIN" ] && options+=("ADMIN")
    [ ! -z "$SERVER" ] && options+=("SERVER")

    for value in "${options[@]}"
    do
        sed -n -i -e "/$value/!p" "$file"
    done
}

function get_configuration()
{
    section="$1"

    if [ ! -z "$section" ] && [ ! -z "$CONFIG" ]; then
        section+="-$CONFIG"
    elif [ -z "$section" ] && [ ! -z "$CONFIG" ]; then
        section="$CONFIG"
    fi

    [ ! -d "$SYSDIR" ] && mkdir --parents --verbose "$SYSDIR"
    tempfile=$(mktemp -p "/tmp/" tempfile.XXXXXXXXXX)
    trap "rm -f $tempfile" 0 1 2 3 15
    [ -z "$tempfile" ] && exit 1

    files="$SYSCONF"
    files+=$'\n'
    files+=$(run-parts --list "$SYSDIR" )

    if [ -n "$files" ]; then
        while read file; do
            set +e
            [ ! -r "$file" ] && continue
            sed -n '/^\['"$section"'\]$/,/^\[.*\]$/{//!p}' "$file" > "$tempfile"
            scan_configuration "$tempfile"
            . "$tempfile"
            set -e
        done < <(echo "$files")
    fi
}

if [ ! -z $CONFIG ]; then
    get_configuration
else
    get_configuration pct-support-chat
fi

if [ -z "$NICKNAME" ]; then
    echo 1>&2 $"nickname not set, try adding --nick support1234, closing now"
    exit 1
fi
if [ -z "$ADMIN" ]; then
    echo 1>&2 $"admin not set, try adding --admin tuxcrafter, closing now"
    exit 1
fi
if [ -z "$SERVER" ]; then
    echo 1>&2 $"server not set, try adding --server chat.freenode.net, closing now"
    exit 1
fi

if [ -z $(which irssi) ]
then
    echo 1>&2 $"irssi is not found, please the irssi irc chat client"
    exit 1
fi

irssifile=$(mktemp -p /tmp/ irssifile.XXXXXXXXXX)
trap "rm --force $irssifile" 0 1 2 3 15

message=$"I would like to request support for my computer, my username is: $USER, please response when available."

echo "servers = (
    {
        address = \"$SERVER\";
        chatnet = \"freenode\";
        port = \"6667\";
        autoconnect = \"yes\";
    }
);

chatnets = {
    freenode =
    {
        type = \"IRC\";
        max_kicks = \"4\";
        max_modes = \"4\";
        max_msgs = \"1\";
        max_whois = \"1\";
        autosendcmd = \"/msg $ADMIN <automessage> $message;/window next\";
    };
};" > $irssifile

echo $"starting irssi chat client..."
/usr/bin/irssi --config=$irssifile --nick="$NICKNAME"
echo $"clossing irssi chat client..."

echo $"bye"
exit