jamendo-playlist

#!/bin/bash

# A script to get the xml database dump of Jamendo database and build a
# playlist with all the tracks.

# Uses wget, gunzip and perl.

# Note: the playlist did not include informations on artist, album and track names.
# These informations are retrieved by mpd when the track is read.

# infos about Jamendo database dumps at
# http://developer.jamendo.com/fr/wiki/NewDatabaseDumps

function error() {
	echo $@
	exit 1
}

DUMP_LOCATION=~/.mpd/jamendo.xml
PLAYLIST_NAME=~/.mpd/playlists/jamendo.m3u

# default file format is mp3 because id3 tags are not decoded by mpd for ogg streams
FILE_FORMAT=mp31

if [ $# = 0 ]; then
	DOWNLOAD_DUMP=1
	MAKE_PLAYLIST=1
else
	while getopts 'dmp:x:f:h' opt
	do
		case "$opt" in
			d)
				DOWNLOAD_DUMP=1;;
			m)
				MAKE_PLAYLIST=1;;
			p)
				PLAYLIST_NAME="$OPTARG";;
			x)
				DUMP_LOCATION="$OPTARG";;
			f)
				case "$OPTARG" in
					mp3)
						FILE_FORMAT=mp31;;
					ogg)
						FILE_FORMAT=ogg2;;
					*)
						ERROR=1
						break;;
				esac;;
			*)
				ERROR=1;
				break;;
		esac
	done
fi

if [ -n "$ERROR" ]; then
	cat >&2 << EOF
${0##*/}, an utility to build an huge playlist from Jamendo, intended to use with mpd.
Adjust max_playlist_length setting in your mpd.conf to load the whole playlist.

Usage: $0 <options>
 Options:
 -d          : download-dump      Download xml database dump from Jamendo server.

 -x <path>   : dump-location      Location of the database dump (where it would be downloaded.
                                  to and where from it will be read from).
                                  Default to ~/.mpd/jamendo.xml.

 -m          : make-playlist      Build a playlist from the xml dump.

 -f <format> : file-format        Music file format querried (mp3 or ogg).
                                  Default to mp3.

 -p <path>   : playlist-location  Destination of the generated playlist file.
                                  Default to ~/.mpd/playlists/jamendo.m3u.

 -h          : help               Displays this help.

If no options given, -dm is implied.
EOF
	exit 1
fi

if [ -z "$DOWNLOAD_DUMP" -a -z "$MAKE_PLAYLIST" ]; then
	error "Nothing to do. Use option -m and/or -d."
fi

if [ -n "$DOWNLOAD_DUMP" ]; then
	echo "Start downloading Jamendo database dump..."
	wget -O- 'http://img.jamendo.com/data/dbdump_artistalbumtrack.xml.gz' \
			| gunzip -c - > "$DUMP_LOCATION.tmp" && \
			mv "$DUMP_LOCATION"{.tmp,} || \
	error "Dump download failed!"
	echo "Database dump downloaded as $DUMP_LOCATION"
fi

if [ -n "$MAKE_PLAYLIST" ]; then
	echo "Building playlist from $DUMP_LOCATION file (format: ${FILE_FORMAT:0:-1})..."
	[ -e "$DUMP_LOCATION" ] || error "$DUMP_LOCATION does not exist!"

	# TODO: use an appropriated tool, because parsing xml with regexes is ugly :)
	perl -ne 'print "http://api.jamendo.com/get2/stream/track/redirect?id=$_\&streamencoding='"$FILE_FORMAT"'\n"
			for /<track><id>(\d+)<\/id>/g' "$DUMP_LOCATION" > "$PLAYLIST_NAME"
	echo "Playlist $PLAYLIST_NAME built (`wc -l < "$PLAYLIST_NAME"` tracks)"
fi