#!/bin/bash
#
# linuxmuster-client-offline
#
# Tobias Küchel 2014, <tobias@linuxmuster.net>
# 04.11.2014
# GPLv2

. /etc/linuxmuster-client/offlineuser/config

[ "x$offlineuserenabled" != "xyes" ] && exit 0

# files involved:
# /etc/linuxmuster-client/offlineuser/config
#                                     lightdm.conf.online,offline
#    -> session-cleanup-script=/usr/bin/linuxmuster-check-offlineity
# /etc/rc.local (workaround for boot.d not working)
# /usr/bin/linuxmuster-setup-offlineuser
# linuxmuster-client-extras-setup --type login --order 020 --on /usr/local/bin/linuxmuster-setup-offlineuser
# leoclient-vm-printer.conf
# run-vm-printer-splitter
# run-vm-printer-spooler

# functions
log_msg() {
    logger -t check-offlineity "$1"
}

STATUSFILE=/etc/linuxmuster-client/offlineuser/offline
PROFILE_USER=linuxadmin
HOMEDIR=/home/$offlineuser

## save the old status of offlineity
[ -e $STATUSFILE ] && OLDSTATUS=1 || OLDSTATUS=0
log_msg "Offlineity was: $OLDSTATUS"

##
## check if we are offline
##
if ! ping -c 1 10.16.1.1 >/dev/null ; then
    ## we should be offline
    echo 1 > $STATUSFILE
else
    ## we should be online, revert changes
    rm -f $STATUSFILE
fi

## Debugging FORCE offline
#echo 1 > $STATUSFILE
#printenv >> /tmp/asdfasdf.$$

## 
## check, if change is needed
##
restart=0
if [ -e $STATUSFILE -a $OLDSTATUS -eq 0 ]; then 
    restart=1
fi
if [ ! -e $STATUSFILE -a $OLDSTATUS -eq 1 ]; then 
    restart=1
fi
if [ -n "$1" -a "x$1"="x--init" ]; then
    restart=1
    log_msg "Called using --init. We set current status offline/online."
fi
## no change needed, get out
[ $restart -eq 0 ] && { log_msg "No change needed."; exit 0; } || log_msg "Changing offline/online status." 

log_msg "Lokales Verzeichnis erstellen/überprüfen"
mkdir -p $offlinetargetdir
chown $offlineuser $offlinetargetdir

if [ -e $STATUSFILE ]; then 
    log_msg "Seem to be offline. Change to offline."
    #pw="$offlineuser"':$6$SCla3OOt$DJSgJ35o/AJxJ0dD5EbkeC7BazOEQlEQfuL.KjlWVNL4XQf3CjXClBe64fN6kaGnryM25WyhnplaZ8fZVEYQs0:16091::::::'
    pw="${offlineuser}:${offlineuserpw}:16091::::::"
    ## Repair leoclient-vm-printer
    log_msg "Fix leoclient-vm-printer to point to Home_lokal"
    sed -i "s/Home_auf_Server/Home_lokal/g" /etc/leoclient/leoclient-vm-printer.conf
    log_msg "Disable network on firewall"
    iptables -A OUTPUT -p all -m owner --uid-owner $offlineuser -j DROP 
    log_msg "autologin lightdm config"
    unlink /etc/lightdm/lightdm.conf
    sed -i "s/%offlineuser%/$offlineuser/" /etc/linuxmuster-client/offlineuser/lightdm.conf.offline
    ln -s /etc/linuxmuster-client/offlineuser/lightdm.conf.offline /etc/lightdm/lightdm.conf 
else
    log_msg "Seem to be online. Change to online." 
    pw="$offlineuser"':*:16091:::::'
    ## Repair leoclient-vm-printer
    log_msg "Fix leoclient-vm-printer to point to Home_auf_Server"
    sed -i "s/Home_lokal/Home_auf_Server/g" /etc/leoclient/leoclient-vm-printer.conf
    log_msg "Enable network on firewall"
    iptables -D OUTPUT -p all -m owner --uid-owner $offlineuser -j DROP 
    unlink /etc/lightdm/lightdm.conf
    ln -s /etc/linuxmuster-client/offlineuser/lightdm.conf.online /etc/lightdm/lightdm.conf 
fi

## replace the lehrer pw
log_msg "Replace the $offlineuser pw"
sed -i "s@^$offlineuser:.*@${pw}@" /etc/shadow

## workaround fast VNC
log_msg "Background setzen"
sed -i 's@<property name="image-show" type="empty"/>@<property name="image-show" type="bool" value="false"/>@' $HOMEDIR/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-desktop.xml

##
## Restart X and lightdm, if status changed
##

## if the service is running, grep returns 0, then stop lightdm
if service lightdm status | grep running >/dev/null ; then
    service lightdm stop
    sleep 2
fi

## workaround: printer-spooler stays after logout
pkill 'run-vm-printer'

## Sync the PROFILE_USER to the offlineuser
## This only works, if the $offlineuser is not logged in, thus when lightdm is down
log_msg "Synching: rsync -rlpt --force --delete /home/$PROFILE_USER/ $HOMEDIR/ "
rsync -rlpt --force --delete /home/$PROFILE_USER/ $HOMEDIR/ 
chown -R $offlineuser:$offlineuser $HOMEDIR

## now start (again)
service lightdm start