Free song extractor for beatmania IIDX ULTIMATE MOBILE

iidxum-extractor.rb

#!/usr/bin/env ruby

require "kconv"

# iidxum-extractor.rb : Free song extractor for beatmania IIDX ULTIMATE MOBILE
#   by takehikom
#   see also: https://takehikom.hateblo.jp/entry/2019/12/10/000000

# beatmania IIDX ULTIMATE MOBILEの楽曲一覧
# (https://p.eagate.573.jp/game/2dx/mobile/music/game.html?game_id=27.0 など)
# から無料でプレイできる楽曲を取り出す。このプログラムは通信をせず、
# 1.0, 1.5, 2.0, 3.0, ..., 27.0（という名前）の各ファイルを読み出す。

class IIDXumExtractor
  def initialize
    init_version_hash
    @versions = @version_hash.keys
    # @versions = ((1..27).map { |i| i.to_f } + [1.5]).sort
  end

  def init_version_hash
    @version_hash = {}
    DATA.each_line do |line|
      if /,/ =~ line.strip
        @version_hash[$`.to_f] = $'
      end
    end
  end

  def extract(ver)
    html = open(ver.to_s).read
    html2 = html.toutf8
    # html2.sub!(/charset=shift.?jis/, "charset=utf-8")

    result = []
    html2.scan(/<tr class="free"><td>(.*?)<\/td><td>(.*?)<\/td>/) do |u, v|
      # '<tr class="free"><td>Calvados Queen</td><td>OSTER project feat. かなたん</td>'
      # のとき，u = 'Calvados Queen', v = 'OSTER project feat. かなたん'
      result << [u, v]
    end

    result
  end

  def start
    total = 0

    @versions.each do |ver|
      next if !test(?f, ver.to_s)
      print @version_hash[ver]
      result = extract(ver)
      puts ": #{result.length} song#{result.length == 1 ? '' : 's'}"
      total += result.length
      result.each do |u, v|
        puts "  #{u} | #{v}"
      end
      puts
    end

    puts "Total: #{total} songs"
  end
end

if __FILE__ == $0
  IIDXumExtractor.new.start
end

__END__
1.0,beatmania IIDX
1.5,beatmania IIDX substream
2.0,beatmania IIDX 2nd style
3.0,beatmania IIDX 3rd style
4.0,beatmania IIDX 4th style
5.0,beatmania IIDX 5th style
6.0,beatmania IIDX 6th style
7.0,beatmania IIDX 7th style
8.0,beatmania IIDX 8th style
9.0,beatmania IIDX 9th style
10.0,beatmania IIDX 10th style
11.0,beatmania IIDX 11 IIDXRED
12.0,beatmania IIDX 12 HAPPY SKY
13.0,beatmania IIDX 13 DistorteD
14.0,beatmania IIDX 14 GOLD
15.0,beatmania IIDX 15 DJ TROOPERS
16.0,beatmania IIDX 16 EMPRESS
17.0,beatmania IIDX 17 SIRIUS
18.0,beatmania IIDX 18 Resort Anthem
19.0,beatmania IIDX 19 Lincle
20.0,beatmania IIDX 20 tricoro
21.0,beatmania IIDX 21 SPADA
22.0,beatmania IIDX 22 PENDUAL
23.0,beatmania IIDX 23 copula
24.0,beatmania IIDX 24 SINOBUZ
25.0,beatmania IIDX 25 CANNON BALLERS
26.0,beatmania IIDX 26 Rootage
27.0,beatmania IIDX 27 HEROIC VERSE