AtOM/atom

#!/bin/bash

## Define exit codes
# General config errors [10-19]
ELOAD=10
EINTERVAL=11
# Source cofig errors [20-29]
# Destination config errors [30-49]
EFORMAT=30
ECHANNEL=31
EFMTINVPARM=49

# config structures
declare -A			\
	destinationchannels	\
	destinationcopymime	\
	destinationformat	\
	destinationfrequency	\
	destinationpath		\
	destinationquality	\
	destinationrename	\
	destinationrenamepath	\
	destinationskipmime	\
|| {
	echo "Check your Bash version. You need >= 4.0" >&2
	exit $EBASHVERS
}

#parse arguments
#parse config
getConfigGeneral() {
	case $key in
		'max-load')
			expr='^[0-9]*$'
			if [[ $value =~ $expr ]]
			then
				maxload="$value"
			else
				echo "Invalid max-load value: $value" >&2
				exit $ELOAD
			fi
			unset expr
		;;
		'load-interval')
			expr='^[0-9]*$'
			if [[ $value =~ $expr ]]
			then
				loadinterval="$value"
			else
				echo "Invalid load-interval value: $value" >&2
				exit $EINTERVAL
			fi
			unset expr
		;;
		'temporary-directory')
			tempdir="$value"
		;;
		debug)
			#unimplemented
		;;
	esac
}

getConfigSource() {
	case "$key" in
		'path')
			sourcepath="$value"
		;;
		'id3charset')
			sourceid3charset="$value"
		;;
	esac
}

getConfigDestination() {
	case "$key" in
		'path')
			destinationpath["$destination"]="$value"
		;;
		'format')
			case "$value" in
				'mp3')
					destinationformat["$destination"]=mp3
				;;
				'vorbis')
					destinationformat["$destination"]=vorbis
				;;
				*)
					echo "Unsupported destination format: $value" >2&
					exit $EFORMAT
				;;
			esac
		;;
		'quality')
			expr='^[0-9]*$'
			if ! [[ $value =~ $expr ]]
			then
				echo "Invalid quality value: $value" >&2
				exit $EQUALITY
			fi
			unset expr
			case "${destinationformat["$destination"]}" in
				'vorbis')
					destinationquality["$destination"]="$value"
				;;
				*)
					echo "$Invalid parameter \"$key\" for format \"${destinationformat["$destination"]}\"" >&2
					exit $EFMTINVPARM
				;;
			esac
		;;
		'bitrate')
			expr='^[0-9]*$'
			if ! [[ $value =~ $expr ]]
			then
				echo "Invalid bitrate value: $value" >&2
				exit $EQUALITY
			fi
			unset expr
			case "${destinationformat["$destination"]}" in
				'mp3')
					destinationquality["$destination"]="$value"
				;;
				*)
					echo "$Invalid parameter \"$key\" for format \"${destinationformat["$destination"]}\"" >&2
					exit $EFMTINVPARM
				;;
			esac
		;;
		'channels')
			expr='^[0-9]*$'
			if ! [[ $value =~ $expr ]]
			then
				echo "Invalid channel count: $value" >&2
				exit $ECHANNEL
			fi
			unset expr
			destinationchannels["$destination"]=$value
		;;
		'frequency')
			expr='^[0-9]*$'
			if ! [[ $value =~ $expr ]]
			then
				echo "Invalid frequency value: $value" >&2
				exit $ECHANNEL
			fi
			unset expr
			destinationfrequency["$destination"]=$value
		;;
		'rename')
			case "$value" in
				*/*)
					destinationrenamepath["$destination"]="${value%/*}"
				;;
			esac
			destinationrename["$destination"]="${value##*/}"
		;;
		'skip_mime-type')
			destinationskipmime[$destination]="${destinationskipmime[$destination]:+${destinationskipmime[$destination]}|}$value"
		;;
		'copy_mime-type')
			destinationcopymime[$destination]="${destinationcopymime[$destination]:+${destinationcopymime[$destination]}|}$value"
		;;
	esac
}
getConfig() {
	while read key value
	do
		case $key in
			'#'*)
				#comment
			;;
			'')
				#empty line
			;;
			'[general]')
				context=General
			;;
			'[source]')
				context=Source
			;;
			\[*\])
				context=Destination
				destination="${key#[}"
				destination="${destination%]}"
			;;
			*)
				getConfig$context
			;;
		esac
	done < ~/.atom/atom.cfg
}

#check sanity

getFiles() {
	:
}

getType() {
	:
}

getInfos::MP3() {
	:
}

getInfos::Ogg() {
	:
}

getInfos::FLAC() {
	:
}

getInfos::MPC() {
	:
}

getTags() {
	#getType
	#getInfos::<type>
	:
}

encodeFile::MP3() {
	#lame
	:
}

encodeFile::Ogg() {
	#oggenc
	:
}

transcodeFile() {
	#sox -> wav
	for format in $targets["format"]
	do
		#encodeFile::$format
		:
	done
	#signal and of encoding to parent
}

checkFinished() {
	#retrieve info from finished transcodeFile()
	#update counters / metadata
	:
}

checkLoad() {
	#if load > threshold
	#	decrease concurrency
	#elif load < threshold
	#	increase concurrency
	#fi
	:
}

readUserInput() {
	#read + / - / q(uit) / p(ause)
	#initiate shutdown / check load threshold / SIGSTOP all children / SIGCONT all children
	:
}

transcodeLauncher() {
	checkLoad
	checkFinished
	#until running processes < max processes
	#do
		checkLoad
		checkFinished
		readUserInput
	#done
	transcodeFile &
	#update counter / metadata
}

#UI
getConfig
{
cat <<EOF
General|Load|$maxload
|Load Interval|$loadinterval
|Temp Dir|$tempdir
|Database|$database
|Debug|$debug
Source|Path|$sourcepath
|ID3 Charset|$sourceid3charset
EOF
for destination in ${!destinationpath[@]}
do
cat <<EOF
$destination|Path|${destinationpath[$destination]}
|Format|${destinationformat[$destination]}
|Quality|${destinationquality[$destination]}
|Channels|${destinationchannels[$destination]}
|Frequency|${destinationfrequency[$destination]}
|Path Change|${destinationrenamepath[$destination]}
|File Rename|${destinationrename[$destination]}
EOF
echo "|Skipped mime-type|${destinationskipmime[$destination]//\|/
|Skipped mime-type|}"
echo "|Copied mime-type|${destinationcopymime[$destination]//\|/
|Copied mime-type|}"
done
}|column -t -s'|' -n

# vim:set ts=8 sw=8: