Class: Epub::Translator::Prompt::Interlace

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#epub_paths ⇒ Object (readonly)

Returns the value of attribute epub_paths.



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# File 'lib/epub/translator/prompt/interlace.rb', line 13

def epub_paths
  @epub_paths
end

#interlace_level ⇒ Object (readonly)

Returns the value of attribute interlace_level.



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# File 'lib/epub/translator/prompt/interlace.rb', line 13

def interlace_level
  @interlace_level
end

#prompt ⇒ Object (readonly)

Returns the value of attribute prompt.



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# File 'lib/epub/translator/prompt/interlace.rb', line 13

def prompt
  @prompt
end

Instance Method Details

#execute(epub_paths:, prompt: ::TTY::Prompt.new) ⇒ Object 



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# File 'lib/epub/translator/prompt/interlace.rb', line 15

def execute(
  epub_paths:,
  prompt: ::TTY::Prompt.new
)
  @epub_paths = epub_paths
  @prompt = prompt

  epub_paths.each do |path|
    return unless valid_epub?(path) # rubocop:disable Lint/NonLocalExitFromIterator
  end

  new_epub_path = prompt.ask(
    'Where do you want to save the result?',
    value: epub_paths.last.pathmap("%X.interlaced%x")
  )

  @interlace_level = prompt.ask(
    "Please input CSS path of DOM level to interlace:",
    value: 'body p,h1,h2,h3,h4,h5,h6'
  )

  FileUtils.copy(epub_paths[0], new_epub_path)

  epub = EPUB::Parser.parse(new_epub_path)
  epub_other = EPUB::Parser.parse(epub_paths[1])

  epub.each_page_on_spine.select(&:xhtml?).each do |item|
    next if item.content_document.oga.css(interlace_level).empty?

    item_other = epub_other.manifest[item.id]
    lang_other = item_other.content_document.oga.lang

    new_dom = item.content_document.oga
    new_dom.interlace(
      item_other.content_document.oga,
      level: interlace_level
    )

    # Style
    new_dom.lang = nil
    style = Oga::XML::Element.new(name: 'style')
    style.inner_text = "*:lang(#{lang_other}) { color: #999 !IMPORTANT; }"
    new_dom.at_css('head').node_set.push(style)

    item.content = new_dom.to_xml
  end
  epub.save

  puts 'Interlacing complete.'
end