discourse/lib/onebox/engine/google_calendar_onebox.rb

# frozen_string_literal: true

module Onebox
  module Engine
    class GoogleCalendarOnebox
      include Engine

      matches_regexp(/^(https?:)?\/\/((www|calendar)\.google\.[\w.]{2,}|goo\.gl)\/calendar\/.+$/)
      always_https
      requires_iframe_origins "https://calendar.google.com"

      def to_html
        url = @url.split('&').first
        src = ::Onebox::Helpers.normalize_url_for_output(url)
        "<iframe src='#{src}&rm=minimal' style='border: 0' width='800' height='600' frameborder='0' scrolling='no'>#{placeholder_html}</iframe>"
      end

      def placeholder_html
        <<-HTML
          <div placeholder>
            <div class='gdocs-onebox gdocs-onebox-splash' style='display:table-cell;vertical-align:middle;width:800px;height:600px'>
              <div style='text-align:center;'>
                <div class='gdocs-onebox-logo g-calendar-logo'></div>
                <p>Google Calendar</p>
              </div>
            </div>
          </div>
        HTML
      end
    end
  end
end