Class: CC2HTML::EpubBuilder

Inherits:
Builder
  • Object
show all
Defined in:
lib/cc2html/epub_builder.rb

Constant Summary collapse

TEMPLATE_DIR = 
'../templates/epub/'

Instance Method Summary collapse

Constructor Details

#initialize(manifest, dest_name, zip_file, opts = {}) ⇒ EpubBuilder

Returns a new instance of EpubBuilder.



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# File 'lib/cc2html/epub_builder.rb', line 5

def initialize(manifest, dest_name, zip_file, opts={})
  super(manifest, dest_name)
  @file_name = 'cc_book'
  @content_dir = File.join(@dest_name, 'content')
  @zip_file = zip_file
  @items_with_resource = @manifest.organizations.organization.item.all_items.select{|i|i.resource}
  @leave_in_folder = opts["leave_unzipped"]
end

Instance Method Details

#compress_into_epub ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 27

def compress_into_epub
  unless @leave_in_folder
    epub = @dest_name + '.epub'
    FileUtils.rm(epub) if File.exists?(epub)
    Zip::File.open(epub, Zip::File::CREATE) do |zipfile|
      Dir["#{@dest_name}/**/**"].each do |file|
        file_path = file.sub(@dest_name+'/', '')
        zipfile.add(file_path, file)
      end
    end
    FileUtils.rmtree(@dest_name)
  end
end

#copy_images ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 88

def copy_images
  return unless @zip_file.end_with?('zip') || @zip_file.end_with?('imscc')
  Zip::File.open(@zip_file) do |zipfile|
    @resources.each do |resource|
      if resource.type == 'webcontent' && resource.href &&
              resource.href.start_with?('web_resources') &&
              File.extname(resource.href) =~ /gif|jpg|png/i
        path = File.join(@content_dir, resource.href)
        FileUtils.mkdir_p(File.dirname(path))
        File.open(path, 'w') do |file|
          entry = zipfile.get_entry(resource.href)
          file << entry.get_input_stream.read
        end
      end
    end
  end
end

#copy_referenced_html_webresources ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 71

def copy_referenced_html_webresources
  return unless @zip_file.end_with?('zip') || @zip_file.end_with?('imscc')
  Zip::File.open(@zip_file) do |zipfile|
    @items_with_resource.each do |item|
      if item.resource.type == 'webcontent' && item.resource.href && item.resource.href.end_with?('html')
        path = File.join(@content_dir = File.join(@dest_name, 'content'), item.identifierref + '.html')
        File.open(path, 'w') do |file|
          entry = zipfile.get_entry(item.resource.href)
          val = entry.get_input_stream.read
          file << val.gsub('%24IMS_CC_FILEBASE%24', 'web_resources')
          # file << entry.get_input_stream.read
        end
      end
    end
  end
end

#create_chapters ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 57

def create_chapters
  template = File.expand_path(TEMPLATE_DIR + 'chapter.html.erb', __FILE__)
  @items_with_resource.each do |item|
    next if item.resource.type == 'webcontent'
    # so stupid... I'll fix later. :)
    @item = item
    path = File.join(@content_dir, item.identifierref + '.html')
    File.open(path, 'w') do |file|
      erb = ERB.new(File.read(template))
      file.write(erb.result(binding))
    end
  end
end

#create_meta_inf ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 106

def create_meta_inf
  meta_dir = File.join(@dest_name, 'META-INF')
  FileUtils.mkdir_p(meta_dir)
  File.open(File.join(meta_dir, 'container.xml'), 'w') do |f|
    f << <<-XML
<?xml version="1.0"?>
<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
   <rootfiles>
  <rootfile full-path="content/#{@file_name}.opf" media-type="application/oebps-package+xml"/>
   </rootfiles>
</container>
XML
  end
end

#create_mimetype_file ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 41

def create_mimetype_file
  File.open(File.join(@dest_name, 'mimetype'), 'w') do |f|
    f << "application/epub+zip\n"
  end
end

#create_nav ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 47

def create_nav
  template = File.expand_path(TEMPLATE_DIR + 'navigation.html.erb', __FILE__)
  path = File.join(@content_dir, 'navigation.html')

  File.open(path, 'w') do |file|
    erb = ERB.new(File.read(template))
    file.write(erb.result(binding))
  end
end

#create_opf ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 121

def create_opf
  template = File.expand_path(TEMPLATE_DIR + 'descriptor.opf.erb', __FILE__)
  path = File.join(@content_dir, @file_name + '.opf')

  File.open(path, 'w') do |file|
    erb = ERB.new(File.read(template))
    file.write(erb.result(binding))
  end
end

#generate ⇒ Object 



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# File 'lib/cc2html/epub_builder.rb', line 14

def generate
  FileUtils.mkdir_p(@dest_name)
  create_mimetype_file
  create_meta_inf
  FileUtils.mkdir_p(@content_dir)
  create_opf
  create_nav
  create_chapters
  copy_images
  copy_referenced_html_webresources
  compress_into_epub
end