Add ApplicationService app status management

docs/development/core/public/kibana-plugin-public.appbase.md

@@ -20,6 +20,7 @@ export interface AppBase
 |  [icon](./kibana-plugin-public.appbase.icon.md) | <code>string</code> | A URL to an image file used as an icon. Used as a fallback if <code>euiIconType</code> is not provided. |
 |  [id](./kibana-plugin-public.appbase.id.md) | <code>string</code> |  |
 |  [order](./kibana-plugin-public.appbase.order.md) | <code>number</code> | An ordinal used to sort nav links relative to one another for display. |
+|  [status](./kibana-plugin-public.appbase.status.md) | <code>AppStatus</code> | The status of the application. |
 |  [title](./kibana-plugin-public.appbase.title.md) | <code>string</code> | The title of the application. |
-|  [tooltip$](./kibana-plugin-public.appbase.tooltip_.md) | <code>Observable&lt;string&gt;</code> | An observable for a tooltip shown when hovering over app link. |
+|  [tooltip](./kibana-plugin-public.appbase.tooltip.md) | <code>string</code> | A tooltip shown when hovering over app link. |
 

docs/development/core/public/kibana-plugin-public.appbase.tooltip_.md → docs/development/core/public/kibana-plugin-public.appbase.status.md

@@ -1,13 +1,13 @@
 <!-- Do not edit this file. It is automatically generated by API Documenter. -->
 
-[Home](./index.md) &gt; [kibana-plugin-public](./kibana-plugin-public.md) &gt; [AppBase](./kibana-plugin-public.appbase.md) &gt; [tooltip$](./kibana-plugin-public.appbase.tooltip_.md)
+[Home](./index.md) &gt; [kibana-plugin-public](./kibana-plugin-public.md) &gt; [AppBase](./kibana-plugin-public.appbase.md) &gt; [status](./kibana-plugin-public.appbase.status.md)
 
-## AppBase.tooltip$ property
+## AppBase.status property
 
-An observable for a tooltip shown when hovering over app link.
+The status of the application.
 
 <b>Signature:</b>
 
 ```typescript
-tooltip$?: Observable<string>;
+status?: AppStatus;
 ```

docs/development/core/public/kibana-plugin-public.appbase.tooltip.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-public](./kibana-plugin-public.md) &gt; [AppBase](./kibana-plugin-public.appbase.md) &gt; [tooltip](./kibana-plugin-public.appbase.tooltip.md)
+
+## AppBase.tooltip property
+
+A tooltip shown when hovering over app link.
+
+<b>Signature:</b>
+
+```typescript
+tooltip?: string;
+```

docs/development/core/public/kibana-plugin-public.applicationsetup.md

@@ -16,5 +16,6 @@ export interface ApplicationSetup
 |  Method | Description |
 |  --- | --- |
 |  [register(app)](./kibana-plugin-public.applicationsetup.register.md) | Register an mountable application to the system. |
+|  [registerAppStatusUpdater(statusUpdater$)](./kibana-plugin-public.applicationsetup.registerappstatusupdater.md) | TODO |
 |  [registerMountContext(contextName, provider)](./kibana-plugin-public.applicationsetup.registermountcontext.md) | Register a context provider for application mounting. Will only be available to applications that depend on the plugin that registered this context. |
 

docs/development/core/public/kibana-plugin-public.applicationsetup.registerappstatusupdater.md

@@ -0,0 +1,24 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-public](./kibana-plugin-public.md) &gt; [ApplicationSetup](./kibana-plugin-public.applicationsetup.md) &gt; [registerAppStatusUpdater](./kibana-plugin-public.applicationsetup.registerappstatusupdater.md)
+
+## ApplicationSetup.registerAppStatusUpdater() method
+
+TODO
+
+<b>Signature:</b>
+
+```typescript
+registerAppStatusUpdater(statusUpdater$: Observable<AppStatusUpdater>): void;
+```
+
+## Parameters
+
+|  Parameter | Type | Description |
+|  --- | --- | --- |
+|  statusUpdater$ | <code>Observable&lt;AppStatusUpdater&gt;</code> |  |
+
+<b>Returns:</b>
+
+`void`
+

src/core/public/application/application_service.mock.ts

@@ -26,18 +26,21 @@ import {
   InternalApplicationStart,
   ApplicationStart,
   InternalApplicationSetup,
+  App,
 } from './types';
 
 type ApplicationServiceContract = PublicMethodsOf<ApplicationService>;
 
 const createSetupContractMock = (): jest.Mocked<ApplicationSetup> => ({
   register: jest.fn(),
+  registerAppStatusUpdater: jest.fn(),
   registerMountContext: jest.fn(),
 });
 
 const createInternalSetupContractMock = (): jest.Mocked<InternalApplicationSetup> => ({
   register: jest.fn(),
   registerLegacyApp: jest.fn(),
+  registerAppStatusUpdater: jest.fn(),
   registerMountContext: jest.fn(),
 });
 
@@ -49,8 +52,7 @@ const createStartContractMock = (legacyMode = false): jest.Mocked<ApplicationSta
 });
 
 const createInternalStartContractMock = (): jest.Mocked<InternalApplicationStart> => ({
-  availableApps: new Map(),
-  availableLegacyApps: new Map(),
+  availableApps$: new Subject<ReadonlyMap<string, App>>(),
   capabilities: capabilitiesServiceMock.createStartContract().capabilities,
   navigateToApp: jest.fn(),
   getUrlForApp: jest.fn(),