Module: Vega::Helper

Defined in:
lib/vega/helper.rb

Instance Method Summary collapse

Instance Method Details

#vega_chart(chart, nonce: true) ⇒ Object 



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# File 'lib/vega/helper.rb', line 3

def vega_chart(chart, nonce: true)
  unless chart.is_a?(Vega::BaseChart) || chart.is_a?(Hash)
    raise TypeError, "expected Vega chart or spec"
  end

  if nonce == true
    # Secure Headers also defines content_security_policy_nonce but it takes an argument
    # Rails 5.2 overrides this method, but earlier versions do not
    if respond_to?(:content_security_policy_nonce) && (content_security_policy_nonce rescue nil)
      # Rails 5.2
      nonce = content_security_policy_nonce
    elsif respond_to?(:content_security_policy_script_nonce)
      # Secure Headers
      nonce = content_security_policy_script_nonce
    else
      nonce = nil
    end
  end

  if chart.is_a?(Hash)
    Vega.render(chart, nonce: nonce)
  else
    chart.to_html(nonce: nonce)
  end
end