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diff --git a/server/sonar-web/src/main/js/store/globalMessages/duck.js b/server/sonar-web/src/main/js/store/globalMessages/duck.js
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+/*
+ * SonarQube
+ * Copyright (C) 2009-2016 SonarSource SA
+ * mailto:contact AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+// @flow
+import uniqueId from 'lodash/uniqueId';
+import { actions } from '../appState/duck';
+
+type Level = 'ERROR' | 'SUCCESS';
+
+type Message = {
+  id: string,
+  message: string,
+  level: Level
+};
+
+export type State = Array<Message>;
+
+type Action = Object;
+
+export const ERROR = 'ERROR';
+export const SUCCESS = 'SUCCESS';
+
+/* Actions */
+const ADD_GLOBAL_MESSAGE = 'ADD_GLOBAL_MESSAGE';
+const CLOSE_GLOBAL_MESSAGE = 'CLOSE_GLOBAL_MESSAGE';
+const CLOSE_ALL_GLOBAL_MESSAGES = 'CLOSE_ALL_GLOBAL_MESSAGES';
+
+const addGlobalMessageActionCreator = (id: string, message: string, level: Level) => ({
+  type: ADD_GLOBAL_MESSAGE,
+  message,
+  level,
+  id
+});
+
+export const closeGlobalMessage = (id: string) => ({
+  type: CLOSE_GLOBAL_MESSAGE,
+  id
+});
+
+export const closeAllGlobalMessages = (id: string) => ({
+  type: CLOSE_ALL_GLOBAL_MESSAGES,
+  id
+});
+
+const addGlobalMessage = (message: string, level: Level) => (dispatch: Function) => {
+  const id = uniqueId('global-message-');
+  dispatch(addGlobalMessageActionCreator(id, message, level));
+  setTimeout(() => dispatch(closeGlobalMessage(id)), 5000);
+};
+
+export const addGlobalErrorMessage = (message: string) =>
+    addGlobalMessage(message, ERROR);
+
+export const addGlobalSuccessMessage = (message: string) =>
+    addGlobalMessage(message, SUCCESS);
+
+/* Reducer */
+const globalMessages = (state: State = [], action: Action = {}) => {
+  switch (action.type) {
+    case ADD_GLOBAL_MESSAGE:
+      return [{
+        id: action.id,
+        message: action.message,
+        level: action.level
+      }];
+
+    case actions.REQUIRE_AUTHENTICATION:
+      // FIXME l10n
+      return [{
+        id: uniqueId('global-message-'),
+        message: 'Authentication required to see this page.',
+        level: ERROR
+      }];
+
+    case actions.REQUIRE_AUTHORIZATION:
+      // FIXME l10n
+      return [{
+        id: uniqueId('global-message-'),
+        message: 'You are not authorized to access this page. Please log in with more privileges and try again.',
+        level: ERROR
+      }];
+
+    case CLOSE_GLOBAL_MESSAGE:
+      return state.filter(message => message.id !== action.id);
+
+
+    case CLOSE_ALL_GLOBAL_MESSAGES:
+      return [];
+    default:
+      return state;
+  }
+};
+
+export default globalMessages;
+
+/* Selectors */
+export const getGlobalMessages = (state: State) => state;