Class: Asciibook::Builders::EpubBuilder

Inherits:
BaseBuilder show all
Defined in:
lib/asciibook/builders/epub_builder.rb

Instance Method Summary collapse

Methods inherited from BaseBuilder

#copy_file

Constructor Details

#initialize(book) ⇒ EpubBuilder

Returns a new instance of EpubBuilder.



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# File 'lib/asciibook/builders/epub_builder.rb', line 4

def initialize(book)
  super
  @dest_dir = File.join(@book.dest_dir, 'epub')
  @theme_dir = File.join(@book.theme_dir, 'epub')
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/asciibook/builders/epub_builder.rb', line 10

def build
  FileUtils.mkdir_p @dest_dir

  layout = Liquid::Template.parse(File.read(File.join(@theme_dir, 'layout.html')))

  # Satisfy epub specifications
  @book.pages.each do |page|
    page.path = page.path.gsub(/.html$/, '.xhtml')
  end

  epub = GEPUB::Book.new do |book|
    book.title = @book.title
    book.identifier = @book.doc.attributes['identifier'] || 'undefined'
    book.language = @book.doc.attributes['language'] || 'en'

    id_pool = GEPUB::Package::IDPool.new

    @book.assets.each do |path|
      book.add_item path, content: File.open(File.join(@book.base_dir, path)), id: id_pool.generate_key(prefix: 'asset_')
    end

    if @book.cover_image_path
      book.add_item(@book.cover_image_path, content: File.open(File.join(@book.base_dir, @book.cover_image_path)), id: 'cover_image').cover_image
    end

    Dir.glob('**/*.{jpb,png,gif,svg,css,js,eot,ttf,woff,woff2}', File::FNM_CASEFOLD, base: @theme_share_dir).each do |path|
      book.add_item path, content: File.open(File.join(@theme_share_dir, path)), id: id_pool.generate_key(prefix: 'theme_asset_')
    end

    Dir.glob('**/*.{jpb,png,gif,svg,css,js,eot,ttf,woff,woff2}', File::FNM_CASEFOLD, base: @theme_dir).each do |path|
      book.add_item path, content: File.open(File.join(@theme_dir, path)), id: id_pool.generate_key(prefix: 'theme_asset_')
    end

    book.ordered do
      @book.pages.each do |page|
        html = layout.render(
          'book' => @book.to_hash,
          'page' => page.to_hash
        )
        book.add_item page.path, content: StringIO.new(html), id: id_pool.generate_key(prefix: 'page_')
      end
    end

    book.add_tocdata tocdata
  end

  epub.generate_epub(File.join(@dest_dir, "#{@book.basename}.epub"))

  # restore page path
  @book.pages.each do |page|
    page.path = page.path.gsub(/.xhtml$/, '.html')
  end
end

#outline(node, level) ⇒ Object 



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# File 'lib/asciibook/builders/epub_builder.rb', line 68

def outline(node, level)
  data = []
  node.sections.each do |section|
    data << {
      text: section.xreftext,
      link: section.page ? section.page.path : "#{@book.find_page_node(section).page.path}##{section.id}",
      level: level
    }
    if section.sections.count > 0 and section.level < (@book.doc.attributes['toclevels'] || 2).to_i
      data.concat outline(section, level + 1)
    end
  end
  data
end

#tocdata ⇒ Object 



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# File 'lib/asciibook/builders/epub_builder.rb', line 64

def tocdata
  outline(@book.doc, 1)
end