#!/bin/bash

# Name: oggz-comments
# Version: 0,1a
# Author: VolodyA! V Anarhist
# Year: 2010
# Licence: GPL 3.0

# this is an oggz-comment wrapper

# the command line should be in the form
# oggz-comments [-o output.ogg | --output output.ogg] [-d | --delete] [-a | -all] [-s serialno  | --serialno serialno]  [-c content-type  | --content-type content-type] [-m metadata.txt | --metadata-file metadata.txt] input.ogg
# or
# oggz-comments -h|--help

#if help
if [ -z "$1" ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
	echo "oggz-commenta version 0,1a. written by VolodyA! V Anarhist"
	echo "The command line should look like this:"
	echo "oggz-comments [-o output.ogg | --output output.ogg] [-d | --delete] [-a | -all] [-s serialno  | --serialno serialno]  [-c content-type  | --content-type content-type] [-m metadata.txt | --metadata-file metadata.txt] input.ogg"
	exit
fi


#go through all the command line a word at a time
OUTPUT=""
DELETE=""
STREAMS=""
METADATA=""
INPUT=""

STATE=""
for COMMAND in "$@"; do
	if [ ${COMMAND:0:1} = "-" ]; then
		if [ "$COMMAND" = "-o" ] || [ "$COMMAND" = "--output" ]; then
			STATE="--output"
		elif [ "$COMMAND" = "-d" ] || [ "$COMMAND" = "--delete" ]; then
			DELETE="--delete"
			STATE=""
		elif [ "$COMMAND" = "-a" ] || [ "$COMMAND" = "--all" ]; then
			STREAMS="$STREAMS --all"
		elif [ "$COMMAND" = "-s" ] || [ "$COMMAND" = "--serialno" ]; then
			STATE="--serialno"
		elif [ "$COMMAND" = "-c" ] || [ "$COMMAND" = "--content-type" ]; then
			STATE="--content-type"
		elif [ "$COMMAND" = "-m" ] || [ "$COMMAND" = "--metadata-file" ]; then
			STATE="--metadata-file"
		else
			echo "Wrong command command '$COMMAND'"
			echo "Use oggz-comments --help for useage information."
			exit 1
		fi
	elif [ -n "$STATE" ]; then # if the STATE is not zero-length
		if [ "$STATE" = "--output" ]; then
			OUTPUT="--output $1"
		elif [ "$STATE" = "--serialno" ]; then
			STREAMS="$STREAMS --serialno $1"
		elif [ "$STATE" = "--content-type" ]; then
			STREAMS="$STREAMS --content-type $1"
		elif [ "$STATE" = "--metadata-file" ]; then
			if [ ! -f "$1" ] || [ ! -r "$1" ]; then
				echo "File '$1' doesn't exist or is not readable"
				exit 2
			fi
			while read LINE
			do
				METADATA="$METADATA \"$LINE\""
			done < "$1"
		fi
		STATE=""
	else
		if [ ! -f "$1" ] || [ ! -r "$1" ]; then
			echo "File '$1' doesn't exist or is not readable"
			exit 2
		fi
		INPUT="$1"
	fi
	shift
done

eval oggz-comment $OUTPUT $DELETE $STREAMS $INPUT $METADATA