#!/bin/sh

usage() {
	echo 'Usage: ${0} -p prefix [-d directory] [-t extension] [-u]'
	echo "	-p	prefix to be removed"
	echo "	-d	destination folder"
	echo "		default current directory"
	echo "	-t	files extension"
	echo "		default to ogg"
	echo "	-u	encode filename in UTF-8"
	echo '---------------------'
}

processing()
{
	echo processing "${@}"
	newfile=`echo "$@" | sed "s/${prefix}//g"`
	[ -n ${iconv} ] && newfile=`echo ${newfile} | iconv -cs -t UTF-8`
	echo "	: copying <$newfile> into <${dest}>"
	cp "${@}" "${dest}/${newfile}"
}

while getopts "p:d:t:u" option 
do
	case ${option} in
		p)
			prefix="${OPTARG}"
			;;
		d)
			dest="${OPTARG}"
			;;
		t)
			ext="${OPTARG}"
			;;
		u) iconv="y"
			;;
		*)
			usage
			exit 1
			;;

	esac
done

dest=${dest:-.}
ext=${ext:-ogg}
[ -z "${dest}" ] && usage && exit 1
[ -z "${prefix}" ] && usage && exit 1

echo 
echo "Copy and rename ${ext} files, removing <${prefix}> prefixes, into <${dest}>."
[ -n "${iconv}" ] && echo '* Filename UTF-8 encoding is on.'
echo 
mkdir -p "${dest}" || (echo "unable to create ${dest}" && exit 1)

find . -maxdepth 1 -type f -name "*.${ext}" -print | while IFS= read file; do processing "${file}" ; done