ufr.sh

#!/bin/bash
printf "Original String: "
read -r ufr_oristring
if [[ -z "$ufr_oristring" ]]
	then
	echo -e "\e[31mPlease provide the original string that needs to be replaced\e[39m"
	exit
fi

printf "New String (This will replace the Original String): "
read -r ufr_newstring
if [[ -z "$ufr_newstring" ]]
	then
	echo -e "\e[31mPlease provide the new string that should replace the string you provided above\e[39m"
	exit
fi

printf "File Extensions to Search & Replace In (* for all): "
read -r ufrextension
if [[ -z "$ufrextension" ]]
	then
	echo -e "\e[31mPlease provide the extion of the files to search and replace in\e[39m"
	exit
fi

printf "\e[31m$ufr_oristring\e[39m will be replaced with \e[31m$ufr_newstring\e[39m in files in current directory and all sub directories. Pleaes note that this change is permanent. You may break things horribly if you make wrong changes. Are you aware of this and want to proceed? (y/n): "
read -r ufr_confirm
if [[ "$ufr_confirm" == "y" ||  "$ufr_confirm" == "Y" ]]
	then
	find . -type f -name "*.$ufrextension" -exec sed -i'' -e "s#$ufr_oristring#$ufr_newstring#g" {} + &&
	if [[ "$ufrextension" == "*" ]]
		then
		ufr_files="all files"
	else
		ufr_files="files with extension $ufrextension"
	fi
	echo -e "\e[32mThe find & replace query for $ufr_files in this and all sub directories has been run \e[39m"
else
	echo -e "\e[31mYou decided not to execute this find & replace query. No actions performed.\e[39m"
fi