Class: Epub::Translator::Prompt::Translate

Inherits:
Object
  • Object
show all
Defined in:
lib/epub/translator/prompt/translate.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#prompt ⇒ Object (readonly)

Returns the value of attribute prompt.



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# File 'lib/epub/translator/prompt/translate.rb', line 12

def prompt
  @prompt
end

Instance Method Details

#execute(epub_path:, config_path: nil, prompt: ::TTY::Prompt.new) ⇒ Object 



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# File 'lib/epub/translator/prompt/translate.rb', line 14

def execute(epub_path:, config_path: nil, prompt: ::TTY::Prompt.new)
  begin
    EPUB::Parser.parse(epub_path)
  rescue Errno::ENOENT
    warn 'Epub not found'
    return
  rescue Archive::Zip::UnzipError
    warn 'Not an Epub'
    return
  end

  translator = Natsukantou::Setup::ConfigLoadOrPrompt.new.execute(
    prompt: prompt,
    config_path: config_path,
  )

  lang_from = prompt.ask("Language code to translate from?")
  lang_from = Natsukantou::LanguageCode.new(lang_from)
  lang_to = prompt.ask("Language code to translate to?")
  lang_to = Natsukantou::LanguageCode.new(lang_to)

  # Make a copy for modification

  new_epub_path = prompt.ask(
    'Where do you want to save the result?',
    value: epub_path.pathmap("%X.#{lang_to.code}%x")
  )
  FileUtils.copy(epub_path, new_epub_path)

  book = EPUB::Parser.parse(new_epub_path)

  items = book.each_page_on_spine.select(&:xhtml?)
  items_untranslated_index = items.map.with_index do |item, index|
    if (doc_lang_code = item.content_document.oga.lang)
      lang = Natsukantou::LanguageCode.new(doc_lang_code)
      lang.is?(lang_to) ? nil : index
    else
      index
    end
  end.compact

  choices = items.map.with_index do |item, index|
    translated = !items_untranslated_index.include?(index)
    [item_label(item, translated), item]
  end.to_h

  targets = prompt.multi_select(
    "Select items to translate:",
    choices,
    default: items_untranslated_index.map { |index| index + 1 },
    per_page: 30, echo: false
  )

  targets.each do |item|
    output_translation_progress(item)

    env = Natsukantou::Env.new(
      dom: item.content_document.oga,
      lang_from: lang_from,
      lang_to: lang_to
    )
    translator.call(env)

    item.content = env[:dom].to_xml
    item.save
  end

  if !targets.empty?
    puts 'Translation complete.'
  end
end