class RubyXL::Writer::ContentTypesWriter

def initialize(dirpath, wb)
  @dirpath = dirpath
  @workbook = wb
  @filepath = dirpath + '/[Content_Types].xml'
end

def write()
  builder = Nokogiri::XML::Builder.new do |xml|
    xml.Types('xmlns'=>"http://schemas.openxmlformats.org/package/2006/content-types") {
      xml.Default('Extension'=>'xml', 'ContentType'=>'application/xml')
      unless @workbook.shared_strings.nil?
        xml.Override('PartName'=>'/xl/sharedStrings.xml',
          'ContentType'=>"application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml")
      end
      if @workbook.macros.nil? && @workbook.drawings.nil?
        xml.Override('PartName'=>'/xl/workbook.xml',
          'ContentType'=>"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml")
      else
        xml.Override('PartName'=>'/xl/workbook.xml',
          'ContentType'=>"application/vnd.ms-excel.sheet.macroEnabled.main+xml")
      end
      xml.Override('PartName'=>"/xl/styles.xml",
        'ContentType'=>"application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml")
      xml.Default('Extension'=>'rels','ContentType'=>'application/vnd.openxmlformats-package.relationships+xml')
      unless @workbook.external_links.nil?
        1.upto(@workbook.external_links.size-1) do |i|
          xml.Override('PartName'=>"/xl/externalLinks/externalLink#{i}.xml",
          'ContentType'=>"application/vnd.openxmlformats-officedocument.spreadsheetml.externalLink+xml")
        end
      end
      unless @workbook.macros.nil?
        xml.Override('PartName'=>'/xl/vbaProject.bin',
          'ContentType'=>'application/vnd.ms-office.vbaProject')
      end
      unless @workbook.printer_settings.nil?
        xml.Default('Extension'=>'bin',
          'ContentType'=>'application/vnd.openxmlformats-officedocument.spreadsheetml.printerSettings')
      end
      unless @workbook.drawings.nil?
        xml.Default('Extension'=>'vml',
          'ContentType'=>'application/vnd.openxmlformats-officedocument.vmlDrawing')
      end
      xml.Override('PartName'=>'/xl/theme/theme1.xml',
        'ContentType'=>"application/vnd.openxmlformats-officedocument.theme+xml")
      @workbook.worksheets.each_with_index do |sheet,i|
        xml.Override('PartName'=>"/xl/worksheets/sheet#{i+1}.xml",
          'ContentType'=>"application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml")
      end
      xml.Override('PartName'=>'/docProps/core.xml',
        'ContentType'=>"application/vnd.openxmlformats-package.core-properties+xml")
      xml.Override('PartName'=>'/docProps/app.xml',
        'ContentType'=>"application/vnd.openxmlformats-officedocument.extended-properties+xml")
    }
  end
  contents = builder.to_xml
  contents = contents.gsub(/\n/,'')
  contents = contents.gsub(/>(\s)+</,'><')
  contents = contents.sub(/<\?xml version=\"1.0\"\?>/,'<?xml version="1.0" encoding="UTF-8" standalone="yes"?>'+"\n")
  contents
end