require 'action_controller'
require 'rqrcode'
require 'rqrcode-rails3/size_calculator.rb'
require 'rqrcode-rails3/renderers/svg.rb'

Mime::Type.register "image/svg+xml", :svg unless Mime::Type.lookup_by_extension(:svg)
Mime::Type.register "image/png",     :png unless Mime::Type.lookup_by_extension(:png)

module RQRCode
  extend SizeCalculator

  ActionController::Renderers.add :qrcode do |string, options|
    format = self.request.format.symbol
    size   = options[:size]  || RQRCode.minimum_qr_size_from_string(string)
    level  = options[:level] || :h

    qrcode = RQRCode::QRCode.new(string, size: size, level: level)
    svg    = RQRCode::Renderers::SVG::render(qrcode, options)

    data = if format == :png
      image = MiniMagick::Image.read(svg) { |i| i.format "svg" }
      image.format "png"
      png = image.to_blob
    else
      svg
    end

    #self.response_body = render_to_string(text: data, template: nil)
    send_data data, type: content_type
  end
end