((window, $) => {

  class ActiveAdmin {

    static get turbolinks() {
      return (typeof Turbolinks !== 'undefined' && Turbolinks.supported);
    }

    static turbolinksVisit(params) {
      const path = [window.location.pathname, '?', this.toQueryString(params)].join('')
      Turbolinks.visit(path);
    }

    static queryString() {
      return (window.location.search || '').replace(/^\?/, '');
    }

    static queryStringToParams() {
      const decode = (value) => decodeURIComponent((value || '').replace(/\+/g, '%20'));

      return this.queryString()
        .split("&")
        .map(pair => pair.split("="))
        .map(([key, value]) => {
          return { name: decode(key), value: decode(value) }
        });
    }

    static toQueryString(params) {
      const encode = (value) => encodeURIComponent(value || '');

      return params
        .map(({name, value}) => [ encode(name), encode(value) ])
        .map(pair => pair.join('='))
        .join('&')
    }
  }

  window.activeadmin = ActiveAdmin

})(window, jQuery);