Simple Google Analytics Measurement Protocol Rails Integration

ga.rb

# -*- encoding : utf-8 -*-
require 'net/http'

class Ga

  attr_accessor :user, :category, :action

  # target for trackings in test environment
  TRACKINGS = []


  def initialize(user, category, action)
    @user = user
    @category = category
    @action = action
    # user may not yet be persisted and not yet have a uuid
    @user.ensure_uuid
  end

  # see
  # https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters
  def track_uri
    uri = URI('http://www.google-analytics.com/collect')
    params = {
      # The protocol version. The value should be 1.
      :v => 1,
      # The ID that distinguishes to which Google Analytics property to send data.
      :tid => 'UA-XXXXXX-1',
      # An ID unique to a particular visitor / user.
      :cid => @user.uuid,
      # The type of interaction collected for a particular user.
      :t => 'event',
      # Specifies the event category
      :ec => @category,
      # Specifies the event action
      :ea => @action
    }
    uri.query = URI.encode_www_form(params)
    uri
  end

  def track
    if 'production' == Rails.env
      logger.info("Track: #{self.track_uri}")
      Net::HTTP.get(self.track_uri)
    elsif 'test' == Rails.env
      TRACKINGS << self.track_uri.to_s
    else
      logger.info("Would track: #{self.track_uri}")
    end
  end

  def logger
    Rails.logger
  end

end