AMBARI-16767. Persist UI console errors (alexantonenko)

ambari-web/app/controllers.js

@@ -27,6 +27,7 @@ require('controllers/experimental');
 require('controllers/global/background_operations_controller');
 require('controllers/global/wizard_watcher_controller');
 require('controllers/global/user_settings_controller');
+require('controllers/global/errors_handler_controller');
 require('controllers/main');
 require('controllers/main/dashboard');
 require('controllers/main/dashboard/config_history_controller');

ambari-web/app/controllers/global/errors_handler_controller.js

@@ -0,0 +1,45 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var App = require('app');
+
+App.ErrorsHandlerController = Em.Controller.extend(App.UserPref, {
+  init: function () {
+    var oldError = window.onerror || Em.K;
+    var self = this;
+    window.onerror = function (err, url, lineNumber, colNumber, Err) {
+      oldError.call(this, err, url, lineNumber, colNumber, Err);
+      var ls = localStorage.getObject('errors') || {};
+      if(Object.keys(localStorage.getObject('errors')).length > 25) {
+        delete ls[Object.keys(ls).sort()[0]];
+      }
+      var key = new Date().getTime();
+      var val = {
+        file: url,
+        line: lineNumber,
+        col: colNumber,
+        error: err,
+        stackTrace: Em.get(Err || {}, 'stack')
+      };
+      ls[key] = val;
+      localStorage.setObject('errors', ls);
+      self.postUserPref(key, val);
+    };
+    return this._super();
+  }
+});