#!/bin/bash
# Copyleft 2010 by Bernd Stellwag <burned@zerties.org>
# use kde/gnome notify system to display information about the song, mpd is currently playing

# Changelog:
#   0.2: add possibility to specify host and port or print some info how to use this script and check if required notify-send (libnotify-bin) is installed
#   0.1: "release"


# see if notify-send (libnotify-bin) is installed
if ! which notify-send > /dev/null ; then
    echo "Please install \"libnotify-bin\" with this Command: \"sudo aptitude install libnotify-bin\" or with your favourite Packagemanager"
    exit
fi

# check if user needs some help
if [ "$1" == "-h" ] || [ "$1" == "--help" ] || [ "$1" == "-help" ] || [ "$1" == "help" ]; then
    echo "mpdnotify 0.3: Copyleft 2010 by Bernd Stellwag <burned@zerties.org>\nUSAGE: mpdnotify [HOST] [PORT]"
    exit
fi


# check if host and port are specified
if [ "$1" == "" ]; then
    host="127.0.0.1"
else
    host="$1"
fi

if [ "$2" == "" ]; then
    port="6600"
else
    port="$2"
fi


# fetch info
currentsong="$(echo "currentsong" | nc $host $port -q1)"


# see if we have an internetstream
httpcheck="$(echo "$currentsong" | grep "file: " | grep "http://")"

# if it is an internetstream handle it
if [ "$httpcheck" != "" ]; then

    # see if there is a streamtitle
    streamtitle="$(echo "$currentsong" | grep "Name: " | sed 's/Name: //g')"
    
    # if there is no streamtitle we set the url as title
    if [ "$streamtitle" == "" ]; then
	streamtitle="$(echo "$currentsong" | grep "file: " | sed 's/file: //g' | sed '/http:\/\///g')"
    fi
    

    # maybe there is some information about the currently playing song
    songinfo="$(echo "$currentsong" | grep "Title: " | sed 's/Title: //g')"
    

    # send info
    notify-send "$streamtitle" "$songinfo"


    # exit the script
    exit
fi


# set title
title="$(echo "$currentsong" | grep "Title: " | awk '{for (i=2;i<=NF;i++) printf ("%s ", $i); print "" }')"

# if there is no title set the filename as title
if [ "$title" == "" ]; then
    title="$(echo "$currentsong" | grep "file: " | sed 's/file:\ //g' | sed 's/musik\///g' | awk -F "/" '{for (i=1;i<=NF;i++) printf ("%s\n", $i)}' | perl -e '@line = <>; chomp(@line); print "@line[$#line]"' | sed 's/.mp3//g')"
fi


# set artist
artist="$(echo "$currentsong" | grep "Artist: " | awk '{for (i=2;i<=NF;i++) printf ("%s ", $i); print "" }')"

# set album
album="$(echo "$currentsong" | grep "Album: " | awk '{for (i=2;i<=NF;i++) printf ("%s ", $i); print "" }')"

# set "artist - album" string if possible
if ([ "$artist" != "" ] && [ "$album" != "" ]); then
    artist_album="$artist - $album"
elif ([ "$artist" != "" ] && [ "$album" == "" ]); then
    artist_album="by $artist"
elif ([ "$artist" == "" ] && [ "$album" != "" ]); then
    artist_album="on $album"
else
    artist_album=""
fi

# if there is no artist/album see what we can get out of the filepath
if [ "$artist_album" == "" ]; then
    filetitle="$(echo "$currentsong" | grep "file: " | sed 's/file:\ //g' | sed 's/musik\///g' | awk -F "/" '{for (i=1;i<=NF;i++) printf ("%s\n", $i)}' | perl -e '@line = <>; chomp(@line); print "@line[$#line]"')"
    artist_album="$(echo "$currentsong" | grep "file: " | sed 's/file:\ //g' | sed 's/musik\///g' | sed "s/\/$filetitle//g")"
fi


# set cover
cover="$(echo "$currentsong" | grep "file: " | sed 's/file: /\/var\/lib\/mpd\/music\//g' | awk -F "/" '{for (i=1;i<=NF;i++) printf ("%s\n", $i)}' | perl -e '@line = <>; chomp(@line); $dir=""; for($i=1;$i<$#line;$i++){ $dir = "$dir"."/"."@line[$i]" }; print "$dir/cover.jpg"')"


# send infos
if [ -e "$cover" ]; then
    notify-send "$title" "$artist_album" -i "$cover"
else
    notify-send "$title" "$artist_album"
fi