#!/bin/bash
## Bash script under the GPL license.
## Question / patch : laurent_defert at yahoo fr
## Description: This script allows to change the background pixmap of the current terminal emulator
## when an ssh command is issued. So you can have a nice pixmap displayed that changes depending
## on which computer you are.
## Usage: put your pixmaps in $XPM_PATH, and name them with the following pattern:
##         *  hostname.xpm      -> xpm specific of the hostname
##         *  user@hostname.xpm -> xpm specific of the username/hostname
##         *  user@hostname:port.xpm -> ...
##        then you can use this script instead of ssh to establish the connection to the remote host
##        After the ssh session, the background $XPM_PATH/default.xpm is set back (or it's to none if it dosn't exists)

XPM_PATH="/home/lds/.termbg"

# Parse arguments
# Hostname
HN=""
# Port
PT=""
# Username
UN=""
# Run in background
BG="0"
for ((i=1;i<=${#};i++))
do
	if [ "${!i:0:1}" == "-" ]
	then
		if [[ "${!i}" == "-f" || "${!i}" == "-n" ]]
		then
			BG="1"
			break
		fi

		if [[ "${!i}" == "-l" ]]
		then
			((i++))
			UN="${!i}"
			continue
		fi

		if [[ "${!i}" == "-p" ]]
		then
			((i++))
			PT="${!i}"
			continue
		fi

		# if this option takes a value, then skip the next argument
		a="${!i}"
		if [[ "$a" == "-b" || "$a" == "-c" || "$a" == "-D" || "$a" == "-e" \
		|| "$a" == "-F" || "$a" == "-i" || "$a" == "-L" || "$a" == "-l" \
		|| "$a" == "-m" || "$a" == "-o" || "$a" == "-p" || "$a" == "-R" \
		|| "$a" == "-S" || "$a" == "-w" ]]
		then
			((i++))
		fi
	else
		HN=${!i}
	fi
done

if [[ "$BG" == "1" || "$HN" == "" ]]
then
	exec ssh "$@"
fi

## Retrieve the username if the hostname is in the form user@hostname
if [ "$UN" == "" ]
then
	## Dirty, if there is a way not to use grep here,
	## send a patch!
	if [ "$(echo $HN|grep @)" != "" ]
	then
		UN=${HN/@*/}
		HN=${HN/*@/}
	fi
fi

#echo User: $UN
#echo Host: $HN
#echo Port: $PT
#echo Bgd : $BG

XPM=""

if [[ "$UN" != "" && "$PT" != "" ]]
then
	if [ -e "$XPM_PATH/$UN@$HN:$PTi.xpm" ]
	then
		XPM="$XPM_PATH/$UN@$HN:$PT.xpm"
	fi
fi

if [[ "$XPM" == "" && "$UN" == "" && "$PT" != "" ]]
then
	if [ -e "$XPM_PATH/$HN:$PT.xpm" ]
	then
		XPM="$XPM_PATH/$HN:$PT.xpm"
	fi
fi

if [[ "$XPM" == "" && "$UN" != "" && "$PT" == "" ]]
then
	if [ -e "$XPM_PATH/$UN@$HN.xpm" ]
	then
		XPM="$XPM_PATH/$UN@$HN.xpm"
	fi
fi

if [ "$XPM" == "" ]
then
	if [ -e "$XPM_PATH/$HN.xpm" ]
	then
		XPM="$XPM_PATH/$HN.xpm"
	fi
fi

#echo background: $XPM

if [ "$XPM" != "" ]
then
	echo $'\033'\]20\;$XPM\;100$'\007'
fi

ssh $@

if [ "$XPM" != "" ]
then
	echo $'\033'\]20\;$XPM_PATH/default.xpm$'\007'
fi