#!/bin/bash
#
# 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/>.
#
#
# A pm-utils evolution of the gaim script from hibernate-script package made by Bernard Blackham
# Copyright (C) 2009 Laurento Frittella <laurento.frittella_AT_gmail_DOT_com>
#
#
# This script set your pidgin(s) offline on system suspend/hibernate
# and restore your previous status and status message on resume/thaw
#
# INSTALLATION: simply copy the script in the "/etc/pm/sleep.d" directory and make it executable
#               (accordingly with the pm-utils man pages you should use a prefix between 00 - 49
#               for the filename. Example: "/etc/pm/sleep.d/10pidgin")
#
# Version: 20090219

purple_remote=$(command -v purple-remote)
if [ -z "$purple_remote" ] || [ ! -x "$purple_remote" ]; then
   echo "purple-remote command not found."
   return 1
fi

get_env_var_of_process()
{
    local pid="$1" envvar="$2"

    tr '\0' '\n' </proc/$pid/environ | sed -ne 's/^'"$envvar"'=\(.*\)$/\1/p'
}

case $1 in
   hibernate|suspend)
	# We will use these purple-remote functions:
	# purple-remote getstatus
	# purple-remote getstatusmessage

	# Cleanup
	rm -f /tmp/pm-utils_pidgin* &> /dev/null

	for pid in $(pidof pidgin); do
	   user=$(get_env_var_of_process $pid USER)
	   dbus_session_bus_address=$(get_env_var_of_process $pid DBUS_SESSION_BUS_ADDRESS)

	   echo "user=$user" >> /tmp/pm-utils_pidgin.${pid}
	   echo "dbus_session_bus_address=$dbus_session_bus_address" >> /tmp/pm-utils_pidgin.${pid}
	   status=$(DBUS_SESSION_BUS_ADDRESS="$dbus_session_bus_address" su "$user" -c "purple-remote getstatus")
	   status_msg=$(DBUS_SESSION_BUS_ADDRESS="$dbus_session_bus_address" su "$user" -c "purple-remote getstatusmessage")
	   echo "purple_status=$status" >> /tmp/pm-utils_pidgin.${pid}
	   echo "purple_status_msg=$status_msg" >> /tmp/pm-utils_pidgin.${pid}

	   DBUS_SESSION_BUS_ADDRESS="$dbus_session_bus_address" su "$user" -c "purple-remote setstatus?status=offline"
	done
	;;
   thaw|resume)
	for to_resume in $(ls /tmp/pm-utils_pidgin*); do
	   source ${to_resume}

	   DBUS_SESSION_BUS_ADDRESS="$dbus_session_bus_address" su "$user" -c "purple-remote setstatus?status=${purple_status}&message=\"${purple_status_msg}\""
	done

	# Cleanup
	rm -f /tmp/pm-utils_pidgin* &> /dev/null
       ;;
esac