#!/bin/bash
# script by mike@altlinux.ru to facilitate with
# Ogg Vorbis tag converting/editing

EDIT=0
OGGEDITOR=vim
GUESS=0
FILTER=cat
ICONVS=""
# et ICONVS to "-s -c" to drop bad chars (with ALT iconv)

[ "$*" = "" ] && {
	echo "USAGE:" >&2
	echo "$0 -wu [oggfiles] to conv 1251->utf" >&2
	echo "$0 -uw [oggfiles] to conv utf->1251" >&2
	echo "$0 -e [oggfiles] to edit tags with ${EDITOR:=vim}" >&2
	echo "$0 -g [oggfiles] to try to guess quickly tag charset" >&2
	exit 0
}

case $1 in
	-wu) FILTER="iconv -fcp1251 -tutf-8"; shift;;
	-uw) FILTER="iconv -futf-8 -tcp1251"; shift;;
	-ku) FILTER="iconv -fkoi8-u -tutf-8"; shift;;
	-uk) FILTER="iconv -futf-8 -tkoi8-u"; shift;;
	-wk) FILTER="iconv -fcp1251 -tkoi8-u"; shift;;
	-kw) FILTER="iconv -fkoi8-u -tcp1251"; shift;;
	-e)  EDIT=1; shift;;
	-g)  GUESS=1; shift;;
esac

for i in "$*"; do
	vorbiscomment -l "$i" \
	| $FILTER > "$i.TAG" && {
		[ $GUESS = 1 ] && {
			grep -q "Ð.Ð.Ð" "$i.TAG" && \
				echo "$i -- like UTF-8" || \
				echo "$i -- like not UTF-8"
			}
		[ $EDIT  = 1 ] && $OGGEDITOR "$i.TAG"
		vorbiscomment -w "$i" < "$i.TAG"
	} || {
		echo "WARNING!  Some problems with \'$i\'," >&2
		echo "*******   examine \'$i.TAG\'!" >&2
		echo ".......   (orig file not modified)" >&2
		exit 1
	}
done