Adds now playing indicator from spotify or MPD to i3status

bar.sh

#!/bin/bash

i3status | while :
do
    read line

    dir=$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
    spotify_status=$(dbus-send --print-reply --session --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get string:'org.mpris.MediaPlayer2.Player' string:'PlaybackStatus' | tail -n1 | cut -d'"' -f2)
    spotify_artist=$(dbus-send --print-reply --session --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get string:'org.mpris.MediaPlayer2.Player' string:'Metadata' | awk -f ${dir}/spotify_song.awk | head -n 1 | cut -d':' -f2)
    spotify_song=$(dbus-send --print-reply --session --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get string:'org.mpris.MediaPlayer2.Player' string:'Metadata' | awk -f ${dir}/spotify_song.awk | tail -n 1 | cut -d':' -f2)
    mpd_song=$(mpc current)

    if [ "$spotify_status" = "Playing" ] ; then
        echo -n "NP: $spotify_artist - $spotify_song | $line" || exit 1
        continue
    elif [ "$mpd_song" != "" ]; then
        mpd_status=$(mpc status | tail -2 | head -1 | cut -d' ' -f1 | tr -d '[]')
        if [ "$mpd_status" = "playing" ]; then            
            echo -n "NP: $mpd_song | $line" || exit 1
            continue
        fi
        echo -n $line || exit 1
        continue
    fi
    echo -n $line || exit 1
done

spotify_song.awk

/string  *"xesam:artist/{
    while (1) {
        getline line
        if (line ~ /string "/) {
            sub(/.*string "/, "artist:", line)
            sub(/".*$/, "", line)
            print line
            break
        }
    }
}
/string  *"xesam:title/{
    while(1) {
        getline line
        if (line ~ /string "/) {
            sub(/.*string "/, "title:", line)
            sub(/".*$/, "", line)
            print line
            break
        }
    }
}

To preserve color I enabled
output_format = "i3bar"
in i3status config and mutated the string with sed (line 14):
echo $(echo "$line" | sed 's/{\"name/{\"name\":\"music\",\"full_text\":\"'"$spotify_artist"' - '"$spotify_song"'\"},{\"name/') || exit 1
A bit messy, but it works.
https://gist.github.com/Romern/8cb31ae62b3f8e5dedb90c2c739dac70