Backport for "xPack:defaultAdminEmail" 7.x specific behaviour

Author: jloleysens

x-pack/legacy/plugins/watcher/public/np_ready/application/7_x_only.ts

@@ -0,0 +1,15 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+let defaultEmailTo: string;
+
+export const setDefaultEmailTo = (emailTo: string) => {
+  defaultEmailTo = emailTo;
+};
+
+export const getDefaultEmailTo = () => {
+  return defaultEmailTo!;
+};

x-pack/legacy/plugins/watcher/public/np_ready/application/boot.tsx

@@ -11,6 +11,7 @@ import { SavedObjectsClientContract } from 'src/core/public';
 import { App, AppDeps } from './app';
 import { setHttpClient, setSavedObjectsClient } from './lib/api';
 import { LegacyDependencies } from '../types';
+import { setDefaultEmailTo } from './7_x_only';
 
 interface BootDeps extends AppDeps {
   element: HTMLElement;
@@ -22,6 +23,7 @@ interface BootDeps extends AppDeps {
 export const boot = (bootDeps: BootDeps) => {
   const { I18nContext, element, legacy, savedObjects, ...appDeps } = bootDeps;
 
+  setDefaultEmailTo(bootDeps.uiSettings.get('xPack:defaultAdminEmail'));
   setHttpClient(appDeps.http);
   setSavedObjectsClient(savedObjects);
 

x-pack/legacy/plugins/watcher/public/np_ready/application/models/action/email_action.js

@@ -7,12 +7,13 @@
 import { get, isArray } from 'lodash';
 import { BaseAction } from './base_action';
 import { i18n } from '@kbn/i18n';
+import { getDefaultEmailTo } from '../../7_x_only';
 
 export class EmailAction extends BaseAction {
   constructor(props = {}) {
     super(props);
 
-    const toArray = get(props, 'to');
+    const toArray = get(props, 'to', getDefaultEmailTo());
 
     this.to = isArray(toArray) ? toArray : toArray && [toArray];