Class: Chaptan::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/chaptan/command.rb,
lib/chaptan/command/options.rb

Overview

A command class for Chaptan

Defined Under Namespace

Modules: Options

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ Command

Returns a new instance of Command.



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# File 'lib/chaptan/command.rb', line 13

def initialize(argv)
  @argv = argv
end

Class Method Details

.run(argv) ⇒ Object 



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# File 'lib/chaptan/command.rb', line 9

def self.run(argv)
  new(argv).execute
end

Instance Method Details

#add_chapter(filename, chapters) ⇒ Object 



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# File 'lib/chaptan/command.rb', line 61

def add_chapter(filename, chapters)
  Mp3Info.open(filename) do |mp3info|
    unless mp3info.tag2.CHAP.nil?
      st = mp3info.tag2.CHAP[0]
      st[34] = "."
      mp3info.tag2.CHAP[0] = st
    end

    if chapters.size.positive?
      chaps = []
      ctoc = "toc1\x00".dup
      ctoc << [3, chapters.size].pack("CC")
      chapters.each_with_index do |ch, i|
        num = i + 1
        title = ch["title"]
        description = ch["description"]
        link = ch["link"]

        ctoc << "chp#{num}\x00"

        chap = "chp#{num}\x00".force_encoding("ASCII-8BIT").dup
        chap << [ch["start"] * 1000, ch["to"] * 1000].pack("NN").force_encoding("ASCII-8BIT")
        chap << "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF".dup.force_encoding("ASCII-8BIT")

        title_tag = [title.encode("utf-16")].pack("a*")
        chap << "TIT2"
        chap << [title_tag.size + 1].pack("N")
        chap << "\x00\x00\x01"
        chap = chap.force_encoding("ASCII-8BIT")
        chap << title_tag

        unless description.nil?
          description_tag = [description.encode("utf-16")].pack("a*")
          chap << "TIT3"
          chap << [description_tag.size + 1].pack("N")
          chap << "\x00\x00\x01"
          chap << description_tag
        end

        unless link.nil?
          chap << "WXXX"
          chap << [link.length + 2].pack("N")
          chap << "\x00\x00\x00#{link}\00"
        end

        chaps << chap
      end
      mp3info.tag2.CTOC = ctoc
      mp3info.tag2.CHAP = chaps
    end
  end
end

#execute ⇒ Object 



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# File 'lib/chaptan/command.rb', line 17

def execute
  options = Options.parse!(@argv)

  mp3filename = options[:filename]
  ymlfilename = options[:yaml]
  if ymlfilename.nil?
    read_chapter(mp3filename)
  else
    chapters = load_yaml(ymlfilename)
    chapters.last["to"] = file_length(mp3filename)
    add_chapter(mp3filename, chapters)
  end
end

#file_length(filename) ⇒ Object 



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# File 'lib/chaptan/command.rb', line 31

def file_length(filename)
  unless FileTest.exist?(filename)
    puts "Error: #{filename} does not exist."
    exit
  end
  Mp3Info.open(filename).length
end

#load_yaml(filename) ⇒ Object 



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# File 'lib/chaptan/command.rb', line 114

def load_yaml(filename)
  yml = YAML.load_file(filename)
  (yml.length - 1).times.each do |i|
    yml[i]["to"] = yml[i + 1]["start"]
  end
  yml
end

#read_chapter(filename) ⇒ Object 



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# File 'lib/chaptan/command.rb', line 39

def read_chapter(filename)
  unless FileTest.exist?(filename)
    puts "Error: #{filename} does not exist."
    exit
  end

  Mp3Info.open(filename) do |mp3info|
    puts mp3info
    puts "CTOC: #{mp3info.tag2.CTOC}"
    puts "TIT2: #{mp3info.tag2.TIT2}"
    puts "TPE1: #{mp3info.tag2.TPE1}"
    if mp3info.tag2.CHAP.nil?
      puts "There is no chapter information."
    else
      mp3info.tag2.CHAP.each do |chapter|
        puts "--------------------"
        puts chapter # .encode('utf-8', 'UTF-16')
      end
    end
  end
end