#!/bin/bash

destdir="/usr/lib/mozilla-firefox"
FILE="$destdir/res/forms.css"

BEGIN="/*** BEGIN EXTRA FIREFOX WIDGETS ***/"
sed_BEGIN="$(echo "$BEGIN" | sed 's@\*@\\*@g')"
END="/*** END EXTRA FIREFOX WIDGETS ***/"
sed_END="$(echo "$END" | sed 's@\*@\\*@g')"

install()
{
echo -e "\nWe are going to be installing the firefox widgets.
This consists of widget images contained in the folder \"form-widgets\" 
as well as some code that will be added to your 
forms.css file in the firefox directory.
----------------------------------
Press enter to begin installation."
read

# Check if widgets have already been installed
grep "$sed_BEGIN" "$FILE" &> /dev/null
if [ "$?" = 0 ] ; then
	echo "The text \"$BEGIN\" was found in $FILE."
	echo "The CSS appears to have already been installed."
	css=true
else
	css=false
fi

# If the widget images are already installed...
if [ -d "$destdir/res/form-widgets" ] ; then
	widgets=true

	loop=true
	while [ "$loop" = true ] ; do
		loop=false
		echo "The directory "$destdir/res/form-widgets" already exists."
		echo "The widget images appear to be installed."
		echo "This directory will be overwritten in installation."
		echo -n "Do you wish to overwrite this folder? (y/n) "
		read widget_choice
		case "$widget_choice" in 
			y | Y | yes | Yes | YES )
				:	
			;;
			n | N | No | NO | no )
				echo "Exiting installation."
				exit 1	
			;;
			* )
				echo "Unknown option!"
				loop=true	
			;;
		esac
	done
			
else
	widgets=false
	echo "Installing the widget images"
	sudo cp -r form-widgets "$destdir"/res
fi

# Install the css
if [ "$css" = false ] ; then
	# Create a backup if wanted
	loop=true
	while [ "$loop" = true ] ; do
		echo "We are about to overwrite $FILE."
		echo -n "Would you like to create a backup? (y/n) "
		loop=false
		read backup_choice
		case "$backup_choice" in
			y | Y | yes | Yes | YES ) 
				echo "Creating backup $FILE.bak"
				#sudo cp "$FILE" "$FILE".bak
			;;
			n | N | no | No | NO )
				:	
			;;
			* )
				echo "Unknown option!"
				loop=true
			;;
		esac
	done
	echo "Appending forms-extra.css to forms.css"
	# append forms-extra.css to forms.css
	temp="$(cat forms-extra.css)"
	sudo echo "$temp" >> "$destdir"/res/forms.css
fi

echo "Firefox widgets installed successfully."
}	
	
uninstall()
{
grep "$sed_BEGIN" "$FILE" &> /dev/null
if [ "$?" = 0 ] ; then
	css=true
else
	echo "Text \"$BEGIN\" not found in $FILE"
	echo "The CSS does not appear to be installed."
	css=false
fi	

if [ -d "$destdir/res/form-widgets" ] ; then
	widgets=true
else
	echo "The directory "$destdir/res/form-widgets" does not exist."
	echo "The widget images do not appear to be installed."
	widgets=false
fi

delete=false
if [ "$css" = true ] ; then
	temp="$(cat "$FILE" | while read line; do
		if [ "$line" = "$BEGIN" ]; then
			delete=true
		fi

		if [ "$delete" = false ]; then
			echo "$line"
		fi

		if [ "$delete" = true ] ; then
			if [ "$line" = "$END" ] ; then
				delete=false
			fi
		fi
	done)"
	
	echo "Restoring "$FILE""
	echo "$temp" > "$FILE"
fi

if [ "$widgets" = true ] ; then
	echo "Removing widget images."
	sudo rm -r "$destdir/res/form-widgets"
fi

if [ "$widgets" = false -a "$css" = false ] ; then
	echo "No actions taken.  Firefox widgets are not installed."
else	
	echo "Firefox widgets successfully removed."
fi
}


echo "1 ) Install Firefox Widgets"
echo "2 ) Remove Firefox Widgets"
echo -n "Select an Option: "
loop=true
while [ "$loop" = true ] ; do
	read option
	loop=false
	case  "$option" in
		1 ) 
			install
		;;
		2 ) 
			uninstall
		;;
		* ) 
			echo "Unknown Option!"
			loop=true
		;;
	esac
done