gistfile1.js

(function ($) {
    $.extend(jQuery ,{
        // keep the old one
        _ajax: jQuery.ajax,
    
        ajax: function (options) {
            var cloneOptions = $.extend({}, options);
            this._ajax($.extend(options, {
                complete: function (res, status) {
                    $(document).trigger('ajaxcomplete', arguments);
                    if (cloneOptions.complete) {cloneOptions.complete.apply(this, arguments);}
                },
            
                success: function (data, textStatus) {
                    $(document).trigger('ajaxsuccess', arguments);
                    if(cloneOptions.success) {cloneOptions.success.apply(this, arguments);}
                },
                error: function(xhr, textStatus, errorThrown) {
                    $(document).trigger('ajaxfailure', arguments);
                    if (xhr.status ===  401) {
                        window.location.href = JSON.parse(xhr.responseText).redirect_url + "?back=" + window.location.href;
                    } else {
                        if(cloneOptions.failure) {cloneOptions.failure.apply(this, arguments);}
                    }
                }
            }));
        }
    });

    /*
        Post a form via ajax.
        
        options:
            type - {String} responseType, ex: html, json, xml, etc
            beforeSumbit {Function} executed before submit
                @args - void
                @scope - the form
                @return - {Boolean} true to proceed with submit, false otherwise
        
        events:
            form.post.complete - fires after form post complete
                @args -  resp
    */
    $.fn.ajaxPostForm = function (options) {
        return $(this).each(function () {
            var el = $(this);
            var settings = $.extend({
                type: 'json',
                beforeSubmit: function() {return true;}
            }, options);
            
            $(this).submit(function (evt) {
                evt.preventDefault();
                
                if (!settings.beforeSubmit.call(el)) {
                    return;
                }
                
                $.post(el.attr('action'), el.serialize(), function(resp) {
                    $(el).trigger('form.post.complete', arguments);
                }, settings.type);
            });
        });
    };
})(jQuery);