#!/bin/sh

# This script compiles and installs a small wrapper that will allow to
# automatically run Xdialog instead of (c)dialog when a script using
# (c)dialog is ran under the X server. It will also optionally replace
# gdialog.

# Change this to suit your compiler...
CC="gcc"
CCOPT="-Wall -o Xdialog.wrapper Xdialog.wrapper.c"

BOX_TITLE="Xdialog wrapper"
BACKTITLE="Xdialog wrapper installation"

function errors() {
	if (( $? != 0 )) ; then
		Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" --no-close \
			--icon ./warning.xpm \
			--yesno "An error occured, do you want\nto see details about it ?" 0 0
		if (( $? == 0 )) ; then
			Xdialog --title "$BOX_TITLE" --backtitle "Error message:" --no-cancel \
				--textbox /tmp/wrapper.$$ 20 64
		fi
		rm -f /tmp/wrapper.$$
		exit 1
	fi
}

if [ -x /usr/bin/Xdialog.wrapper ] ; then
	Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" \
		--msgbox "Xdialog wrapper already installed." 0 0
	exit 0
fi

Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" \
	--yesno "This script installs a small wrapper\n\
that will automatically invoke \"Xdialog\"\n\
instead of \"dialog\" or \"cdialog\", when\n\
the user is working under X.\n\n\
Do you want to continue (note that you
must be root to run this script) ?" 0 0

if (( $? != 0 )) ; then
	exit 0
fi

DIALOG=""
CDIALOG=""
PATH_LIST=`echo $PATH | sed -e "y/:/ /"`
for i in $PATH_LIST; do
	if [ "$DIALOG" == "" ] && [ -d $i ] ; then
		DIALOG=`find $i -name dialog -print`
	fi
	if [ "$CDIALOG" == "" ] && [ -d $i ] ; then
		CDIALOG=`find $i -name cdialog -print`
	fi
done

if ! [ -x Xdialog.wrapper ] ; then
	if ! [ -f Xdialog.wrapper.c ] ; then
		Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" --left \
			--msgbox "Error:\nCan't find \"Xdialog.wrapper.c\"" 0 0
		rm -f /tmp/wrapper.$$
		exit 1
	fi
	echo "" >/tmp/wrapper.$$
	( echo "Compiling the wrapper..." ; $CC $CCOPT 2>&1 ; echo "Done." ) | \
	Xdialog --title "$BOX_TITLE" --backtitle "Compiling Xdialog.wrapper..." \
		--no-close --no-cancel --tailbox "-" 20 64
fi

if ! [ -x Xdialog.wrapper ] ; then
	Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" --left \
		--msgbox "Error:\nCan't find \"Xdialog.wrapper\"" 0 0
	rm -f /tmp/wrapper.$$
	exit 1
fi

mv Xdialog.wrapper /usr/bin/ 2>/tmp/wrapper.$$
errors
chmod 755 /usr/bin/Xdialog.wrapper 2>/tmp/wrapper.$$
errors

if [ "$DIALOG" != "" ] && [ -f $DIALOG ] ; then
	mv $DIALOG $DIALOG.wrapped 2>/tmp/wrapper.$$
	errors
	ln -s /usr/bin/Xdialog.wrapper /usr/bin/dialog 2>/tmp/wrapper.$$
	errors
fi

if [ "$CDIALOG" != "" ] && [ -f $CDIALOG ] ; then
	mv $CDIALOG $CDIALOG.wrapped 2>/tmp/wrapper.$$
	errors
	ln -s /usr/bin/Xdialog.wrapper /usr/bin/cdialog 2>/tmp/wrapper.$$
	errors
fi

Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" \
	--msgbox "Wrapper installed succesfully." 0 0

GDIALOG=""
XDIALOG=""
for i in $PATH_LIST; do
	if [ "$GDIALOG" == "" ] && [ -d $i ] ; then
		GDIALOG=`find $i -name gdialog -print`
	fi
	if [ "$XDIALOG" == "" ] && [ -d $i ] ; then
		XDIALOG=`find $i -name Xdialog -print`
	fi
done

if [ "$XDIALOG" != "" ]  &&  [ "$GDIALOG" != "" ]  &&  ! [ -x $GDIALOG.orig ] ; then
	Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" \
		--yesno "I also found \"gdialog\" on your system...\nDo you want \"Xdialog\" to replace it ?" 0 0
	if (( $? == 0 )) ; then
		mv $GDIALOG $GDIALOG.orig 2>/tmp/wrapper.$$
		errors
		ln -s $XDIALOG $GDIALOG 2>/tmp/wrapper.$$
		errors
		Xdialog --title "$BOX_TITLE" --backtitle "$BACKTITLE" \
		--msgbox "\"gdialog\" replaced succesfully." 0 0
	fi
fi

rm -f /tmp/wrapper.$$