#!/bin/sh -x
# Automatic Green Bubble skin installer for NetScaler
# See http://http://blogs.citrix.com/2012/04/19/green-bubble-theme-for-citrix-netscaler for complete details
# 
# Description: 
# This script will automatically download and install the current GreenBubble NetScaler Theme for the Access Gateway Portal UI
# from the Citrix CDN, extract all files to the /var/vpn/themes directory, automatically adjust referenced major and minor 
# build numbers in the static content, copy the content to flash, and finally put an entry in nsafter.sh to automatically run
# the routine at each startup to check installation state and to copy the custom content to flash.  This script assumes internet
# connectivity from the NetScaler is available but will prompt the user for manual download if installing the skin out-of-band.
# 
# To run simply enter ./GreenBubble#.sh:
# GreenBubble1 = Base GreenBubble Skin 
# GreenBubble2 = Base GreenBubble Skin with addition of Domain Drop-down (Requires Additional configuration described in: http://support.citrix.com/article/CTX118657)
# GreenBubble3 = Base GreenBubble Skin with ReCaptcha
# GreenBubble4 = Base GreenBubble SKin with ReCaptcha and Domain Drop-down (Requires Additional configuration described in: http://support.citrix.com/article/CTX118657)


# Variables
SKINNAME=`basename $0 .sh`
SKINARC="$SKINNAME.gz"
SKINDIR="/var/vpn/themes"
DL="/tmp"

# Short names
EPA="ns_gui/epa/epa.html"
SKINURL="http://cdn.ws.citrix.com/wp-content/uploads/2012/04/$SKINARC"

if ! [ -d $SKINDIR/$SKINNAME ] ; then
	if ! [ -s $DL/$SKINARC  ] ; then
		# No wget on NS so use a bit of perl to download the skin
		echo "$0: Downloading skin archive '$SKINARC' to $DL"
		perl -e 'use LWP::Simple; $skin = get "'$SKINURL'"; open(F, ">'$DL/$SKINARC'"); print F $skin; close(F);'
		if [ $? -ne 0 ] ; then
			echo "$0: Failed to download skin archive '$SKINARC' to '$DL'. Please fetch '$SKINURL', copy '$SKINARC' to '$DL' and rerun this script."
			exit 1
		fi
	fi
	echo "$0: Extracting skin archive '$DL/$SKINARC'"
	mkdir -p $SKINDIR
	cd $SKINDIR
	tar zxf $DL/$SKINARC || exit 1
	rm $DL/$SKINARC
fi

# Find the skin version
OLDCOMMAVER=`fgrep 'var nsversion=' $SKINDIR/$SKINNAME/$EPA | cut -d\" -f2`
OLDDOTVER=`echo $OLDCOMMAVER | tr ',' '.'`

# Find the running version
DOTVER=`nsapimgr -d hwinfo | grep Version: | sed -e 's/Version: NetScaler NS//' -e 's/: Build /\./' -e 's/, Date.*//' | cut -d. -f1,2,3,4`
COMMAVER=`echo $DOTVER | tr '.' ','`

if [ $OLDDOTVER != $DOTVER ] ; then
	# Replace the version string in html files with the current version
	find $SKINDIR/$SKINNAME -type f -name \*.html -exec sed -e "s/$OLDDOTVER/$DOTVER/g" -e "s/$OLDCOMMAVER/$COMMAVER/g" -i '' {} \;
fi

# Install the skin
cp -rf $SKINDIR/$SKINNAME/ /netscaler/

# Install the loader
cp $0 $SKINDIR
chmod 755 $SKINDIR/$SKINNAME.sh
touch /nsconfig/nsafter.sh
chmod 755 /nsconfig/nsafter.sh
if ! fgrep -q $SKINDIR/$SKINNAME.sh /nsconfig/nsafter.sh ; then
	echo >>/nsconfig/nsafter.sh $SKINDIR/$SKINNAME.sh
fi