#!/bin/bash
# RAPC - Copyright 2005-2007 James Dinan <dinan@cse.ohio-state.edu>
#
# 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 2 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 St, Fifth Floor, Boston, MA  02110-1301  USA

############################################
# Set up some defaults
url="http://www.cse.ohio-state.edu/rapcs/"
# Location of html2text.  Most distros have a package for this.
# Or you can get the source at http://www.mbayer.de/html2text/
html2text=$(which html2text)
# The default user name
user=""
# Fullscreen args to rdesktop (-f option)
f_opts="-a 16 -f"
# 1024x768 windowed rdesktop args (-w option)
w_opts="-a 16 -g 1152x864"
# Set the default rdesktop args
rd_opts=$w_opts
############################################

############################################
# Some globals
version="0.3"
logfile=`mktemp`
firstavail=""
############################################

usage () {
	echo "RAPC v$version: by James Dinan <dinan@cse.ohio-state.edu>"
	echo "           Helps get you connected to a free RAPC."
	echo
	echo "Usage: `basename $0` [rapc_args] [-- [rdesktop_args]]"
	echo
	echo "Options:"
	echo "	-a	Connect to the first available RAPC.  Otherwise,"
	echo "		display a list of RAPCS and choose interactively."
	echo "	-c num  Connect to specific RAPC"
	echo "	-f	Use fullscreen settings"
	echo "	-w	Use windowed settings"
# This has no effect at OSU since the RAPC machines are set to "always prompt for password"
#	echo "	-p	Prompt for password"
	echo "	-u user Specify a username"
	echo "	-nd	Don't use the default rdesktop options.  Useful if"
	echo "		you want completely override them rather than add to them."
	echo "		Where this is in the argument list matters.  If you"
	echo "		speficy \"-nd -f\" -f will override -nd and vice versa."
	echo "		Example: rapc -nd -- -a 32 -g 90%"
}

while [ $1 ]
do
        case "$1" in
        -a)  firstavail="w00t!"
             ;;
	-c)  shift
	     connect_to=$1
	     ;;
	-nd) rd_opts=""
	     user=""
	     ;;
	-f)  rd_opts=$f_opts
	     ;;
	-w)  rd_opts=$w_opts
	     ;;
	-u)  shift
	     user=$1
	     ;;
	-p)  passwd=true
	     ;;
        --)  shift
	     rd_opts=$rd_opts$@
	     break
             ;;
        -h|--help|-help)
             usage
             exit 0
             ;;
        *)   usage
	     exit 0
             ;;
        esac
        shift;
done

if [ $connect_to ]
then
	rapc=rapc$connect_to.cse.ohio-state.edu
else
	if [ -z $html2text ]
	then
		echo "Error: html2text not found"
		exit 1
	fi
	
	[ ! $firstavail ] && echo "Downloading list of RAPCs (this may take a moment) ..."

	$html2text -o $logfile $url

	if [ $firstavail ]
	then
		rapc=`sed -e 's/[\ \t]*\(rapc.\.cse\.ohio-state\.edu\)[\ \t]*Free/\1/p' -e'd' $logfile | head -n1`
		if [ -z $rapc ]
		then
			echo "ERROR: No available RAPCs!"
			exit 1
		fi
	else
		# Grep off garbage from html2text
		grep -v "<?xml.*?>" $logfile
		echo -e "\nEnter the number of the RAPC you would like to connect to."
		echo -n ": "
		read rapc_num
		[ -z $rapc_num ] && echo "aborting." && exit 0
		rapc=rapc$rapc_num.cse.ohio-state.edu
		echo Connecting to $rapc ...
	fi
fi

[ $passwd ] && rd_opts="-p - $rd_opts"
[ $user ] && rd_opts="-u $user $rd_opts"
echo "rd_opts=$rd_opts, rapc=$rapc"
rdesktop $rd_opts $rapc &