module PlataformaSocial
  class UTM
    def self.add_utm_to_url url, options = {}
      settings = {
        utm_source: 'dito',
        utm_medium: nil,
        utm_campaign: nil
      }.merge options

      parsedURL = URI.parse(url)

      params = Rack::Utils.parse_nested_query(parsedURL.query).merge(settings)
      hash   = ''

      if url.index('#')
        splittedHash = url.split('#')
        hash = splittedHash[1]
        url = splittedHash[0]
      end

      url = url.split('?')[0] + '?' + params.to_param
      url = url + '#' + hash if hash.present?

      url
    end
  end
end