Current vs. Ideal has many workflow for Active Admin

gistfile1.js

//current workflow

//Inside of callback function on file upload completion
var $container = $(".advertising_entities");
$container.find(".has_many_add").trigger("click");

//better workflow
var $container = $(".advertising_entities");
var $has_many_element = $container.find(".has_many_add");
activeAdmin.api.form.add_has_many($has_many_element);

//needed changes
//API structure debatable just for example:
function activeAdmin() {
  return {
    api: {
      form: {
        add_has_many: function($elem){
          parent = elem.closest('.has_many_container');
          parent.trigger(before_add = $.Event('has_many_add:before'));
          if (!before_add.isDefaultPrevented()) {
            index = parent.data('has_many_index') || parent.children('fieldset').length - 1;
            parent.data({
              has_many_index: ++index
            });
            regex = new RegExp(elem.data('placeholder'), 'g');
            html = elem.data('html').replace(regex, index);
            fieldset = $(html).insertBefore(this);
            recompute_positions(parent);
            return parent.trigger('has_many_add:after', [fieldset]);
          }
        }
      }
    }
  }
  
}
//Decoupled code calls api
$(document).on('click', 'a.button.has_many_add', function(e) {
  var before_add, elem, fieldset, html, index, parent, regex;
  e.preventDefault();
  activeAdmin.api.form.add_has_many($(this));
});