Quick and dirty hack to clean out Last.fm track profile one page at a time.

unfuck-lastfm-profile.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'webrat'
require 'rspec'
require 'nokogiri'

Webrat.configure do |config|
  config.mode = :mechanize
end

include Webrat::Matchers, Webrat::Methods

visit   'https://last.fm/login'
fill_in 'username', :with => 'foo'
fill_in 'password', :with => 'bar'
click_button 'Come on in'
visit   'http://www.last.fm/user/foo/tracks'
response_body.should =~ /Logout/

formtoken = response_body[/formtoken":"(\w+)",/, 1]
last      = response_body[/var lastrt = (\d+);/, 1]

doc = Nokogiri::HTML(response_body)
doc.search('a.delete').each do |element|
  element.attributes['onclick'].to_s.split(';').last.split(';').last.match(/(\d+), (\d+)/)
  track  = $1
  date   = $2
  row_id = element.parent.parent.attributes['id'].to_s
  data   = { '_' => '', 'mc' => '1', 'rowid' => row_id,
             'track' => track, 'date' => date,
             'formtoken' => formtoken, 'last' => last }

  p data
  visit 'http://www.last.fm/ajax/rmrecenttrack', :post, data
end