bandcamp-mp3-dl

#!/usr/bin/env ruby
require 'curb'
require 'nokogiri'
require 'ostruct'
require 'pry'
require 'securerandom'
require 'json'
require 'taglib'
require 'time'
require 'zaru'

def getnoko(curl_res)
  Nokogiri::HTML.parse(curl_res.body_str)
end

def gethref(str, domain)
  str.match(/^\//) ? "https://#{domain}#{str}" : str
end

url = ARGV[0].gsub("http://","https://")

puts url.inspect

page = getnoko(Curl.get(url))


mp3script = page.css('script').select{|x|
  h = x.to_html;
  h.include?('bcbits.com') && h.include?('data-tralbum')
}

tralbum = mp3script[0].attr('data-tralbum')
if !tralbum
  tralbum = mp3script[0].inner_text
end

manifest = JSON.parse(tralbum)

album = manifest['current']['title']
time = Time.parse(manifest['current']['release_date'])

tracks = manifest['trackinfo']

list = tracks.each_with_index do |x, i|
  next unless x['file']

  title = x['title']
  url = x['file']['mp3-128']
  trackNum = i + 1
  #filepath = trackNum.to_s.rjust(2, "0") + " - " + title.gsub(/[^,?a-zA-Z0-9 _'"-]/, '') + ".mp3"
  filepath = trackNum.to_s.rjust(2, "0") + " - " + Zaru.sanitize!(title) + ".mp3"

  puts "Downloading #{title} to #{filepath} from #{url} ..."

  Curl::Easy.download(url, filepath)
  
  # Tag
  tag = TagLib::FileRef.open(filepath) do |file|
    unless file.null?
      tag = file.tag
      tag.title = title
      tag.artist = manifest['artist']
      tag.album = album
      tag.track = trackNum
      tag.year = time.year
      file.save
    end
  end
end