MAGETWO-60982: AJAX calls does not process error responses

Author: slopukhov

app/code/Magento/Ui/view/base/web/js/form/client.js

@@ -7,8 +7,9 @@ define([
     'jquery',
     'underscore',
     'mageUtils',
-    'uiClass'
-], function ($, _, utils, Class) {
+    'uiClass',
+    'mage/translate'
+], function ($, _, utils, Class, $t) {
     'use strict';
 
     /**
@@ -73,6 +74,48 @@ define([
              */
             complete: function () {
                 $('body').trigger('processStop');
+            },
+
+            /**
+             * Error callback.
+             */
+            error: function (request, type, errorThrown) {
+                var message;
+
+                switch (type) {
+                    case 'timeout':
+                        message = $t('The request timed out.');
+                        break;
+                    case 'notmodified':
+                        message = $t('The request was not modified but was not retrieved from the cache.');
+                        break;
+                    case 'parsererror':
+                        message = $t('XML/Json format is bad.');
+                        break;
+                    case 'abort':
+                        message = $t('The request was aborted by the server.');
+                        break;
+                    default:
+                        message = $t('HTTP Error') + ' (' + request.status + ' ' + request.statusText + ').';
+                }
+
+                $('body').notification('clear');
+                $('body').notification('add', {
+                    error: true,
+                    message: message,
+
+                    /**
+                     * Insert method.
+                     *
+                     * @param {String} msg
+                     */
+                    insertMethod: function (msg) {
+                        var $wrapper = $('<div/>').addClass(messagesClass).html(msg);
+
+                        $('.page-main-actions', selectorPrefix).after($wrapper);
+                    }
+                });
+
             }
         });