tracking_link_to

applicaton_helper.rb

  # Wrapper around link_to to help with event tracking links.
  # Adds the `track-event` class (even if another class is present)
  # and adds the tracking data to the data attributes hash.
  #
  # Usage:
  #
  #   tracking_link_to "Events", event_path, category: "Events", action: "Visit Events", label: "Events"
  #
  # If you need to pass html_options, be sure to let it know where one hash ends and the other begins:
  #
  #   tracking_link_to "News", news_path, { category: "News", action: "Clicked News", label: "News" }, 
  #     class: "extra-class", data: { extra: "Extra Stuff" }
  #
  def tracking_link_to(*args)
    tracking_options = args[2] || {}
    html_options     = args[3] || {}

    # Merge in `track-event` class for all tracking links
    html_options[:class] = [html_options[:class], "track-event"].compact.join " "

    # Turn tracking options into data attributes
    html_options[:data] ||= {}
    html_options[:data].merge!(
      ga_category: tracking_options[:category],
      ga_action:   tracking_options[:action],
      ga_label:    tracking_options[:label]
    )

    # Pass it off to link_to
    link_to args[0], args[1], html_options
  end