jQuery Campaign Monitor Ajax form

jquery-cm-ajax-form.js

(function($) {
  var pluginName = 'cmAjaxForm';

  $.fn.cmAjaxForm = function(callback) {
    this.each(function() {
      var $this = $(this);

      if (!$this.data(pluginName)) {
        $this.data(pluginName, new cmAjaxForm($this, callback));
      }
    });
  };

  function cmAjaxForm($el, callback) {
    this.$el = $el;
    this.callback = callback;
    this.formId = $el.attr('data-id');

    this.bind();
  }

  cmAjaxForm.prototype.bind = function() {
    this.$el.on('submit', $.proxy(this.onSubmit, this));
  };

  cmAjaxForm.prototype.onSubmit = function(e) {
    e.preventDefault();

    $.post('https://createsend.com//t/getsecuresubscribelink', this.$el.serialize() + '&data=' + this.formId)
      .done($.proxy(function(subscribeUrl) {
        if (subscribeUrl.indexOf('subscribeerror') > -1) {
          console.warn('Failed to get secure subscribe link: ' + subscribeUrl);
        }

        $.post(subscribeUrl, this.$el.serialize())
          .always($.proxy(function() {
            if ($.isFunction(this.callback)) {
              this.callback.apply(this.$el);
            }
          }, this));

      }, this))
      .fail(function() {
        console.warn('Failed to get secure subscribe link');

      });
  };
}(jQuery));