spotify-dbus

#!/bin/bash

# Collect DBUS_SESSION_BUS_ADDRESS from running process
function set_dbus_adress
{
    USER=$1
    PROCESS=$2
    PID=`pgrep -o -u $USER $PROCESS`
    ENVIRON=/proc/$PID/environ

    if [ -e $ENVIRON ]
	 then
	export `grep -z DBUS_SESSION_BUS_ADDRESS $ENVIRON`
	 else
	echo "Unable to set DBUS_SESSION_BUS_ADDRESS."
	exit 1
	fi
}

function spotify_cmd
{
    dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.$1 1> /dev/null
}

function spotify_query
{
    qdbus org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get org.mpris.MediaPlayer2.Player PlaybackStatus
}

function quit_message
{
    echo "Usage: `basename $0` {play|pause|playpause|next|previous|stop|playstatus|<spotify URI>}"
    exit 1
}

# Count arguments, must be 1
if [ "$#" -ne "1" ]
then
        echo -e "You must supply exactly one argument!\n"
	quit_message
fi

# Check if DBUS_SESSION is set
if [ -z $DBUS_SESSION_BUS_ADDRESS ] 
     then
    #echo "DBUS_SESSION_BUS_ADDRESS not set. Guessing."
    set_dbus_adress `whoami` spotify
fi

case "$1" in
        play)
	spotify_cmd Play
                ;;
        pause)
	spotify_cmd Pause
                ;;
        playpause)
	spotify_cmd PlayPause
                ;;
        next)
	spotify_cmd Next
                ;;
        previous)
	spotify_cmd Previous
                ;;
        stop)
	spotify_cmd Stop
                ;;
        spotify:user:*)
	spotify_cmd "OpenUri string:$1"
	spotify_cmd Play
                ;;
        spotify:*:*)
	spotify_cmd "OpenUri string:$1"
                ;;
    playstatus)
	spotify_query
	;;
        *)
                echo -e "Bad argument.\n"
                quit_message
                ;;
esac

exit 0