bl-spotify.rb

#!/usr/bin/env ruby

# This is my current blacklist when playing spotify in radio mode with "heavy metal".
blacklist = ['Nickelback', 'Scorpions', 'Watain', 'Mayhem', 'Guns N\' Roses']

# gem install ruby-dbus
require "dbus"

session_bus = DBus::SessionBus.instance

# Get in touch with the Spotify service
spotify = session_bus.service("org.mpris.MediaPlayer2.spotify")

# Get the object from this service
player = spotify.object("/org/mpris/MediaPlayer2")

# Introspect it
player.introspect
if player.has_iface? "org.mpris.MediaPlayer2.Player"
  player_iface = player["org.mpris.MediaPlayer2.Player"]
end

# Main loop
loop do
  artist = player_iface["Metadata"]["xesam:artist"]
  if blacklist.include?(artist)
    t = Time.now
    puts t.strftime("(%H:%M) #{artist} is blacklisted, switching to next track")
    player_iface.Next
  end
  sleep(3)
end