[CORD-2869] Adding service status dropdown

Change-Id: I8faa6d96f202fc097cc12df87e1825d7dff2852f
diff --git a/conf/proxy.js b/conf/proxy.js
index 387bd57..fa0c1a7 100644
--- a/conf/proxy.js
+++ b/conf/proxy.js
@@ -19,7 +19,7 @@
 const httpProxy = require('http-proxy');
 
 const target = process.env.PROXY || '127.0.0.1:9101';
-const wsTarget = process.env.WS || '127.0.0.1:3000';
+const wsTarget = process.env.WS || target || '127.0.0.1:3000';
 
 const proxy = httpProxy.createProxyServer({
   target: `http://${target}`,
@@ -36,7 +36,7 @@
 });
 wsProxy.on('error', function(error, req, res) {
   res.writeHead(500, {'Content-Type': 'text/plain'});
-  console.error('[Proxy]', error);
+  console.error('[wsProxy]', error);
 });
 
 module.exports = {
diff --git a/src/app/core/header/header.html b/src/app/core/header/header.html
index 56cf7f1..f416204 100644
--- a/src/app/core/header/header.html
+++ b/src/app/core/header/header.html
@@ -52,6 +52,16 @@
           typeahead-template-url="customTemplate.html"
           typeahead-on-select="vm.routeSelected($item, $model, $label)">
       </form>
+      <div class="nav navbar-nav navbar-right">
+        <div class="btn-group" uib-dropdown is-open="status.isopen">
+          <a id="single-button" class="btn btn-accent" uib-dropdown-toggle>
+            Service Status <span class="caret"></span>
+          </a>
+          <div class="dropdown-menu" uib-dropdown-menu role="menu" aria-labelledby="single-button">
+            <service-status></service-status>
+          </div>
+        </div>
+      </div>
     </div>
   </div>
 </nav>
diff --git a/src/app/core/header/header.scss b/src/app/core/header/header.scss
index 30347f8..f6006d2 100644
--- a/src/app/core/header/header.scss
+++ b/src/app/core/header/header.scss
@@ -39,24 +39,29 @@
 
   .dropdown-menu {
     background: #2a2d35 !important;
-    min-width: 275px;
-    max-height: 600px;
-    overflow-y: scroll;
+    min-width: 300px;
 
-    .active > a {
-      border-left: 6px solid #f6a821;
-      background: #494b54;
-      color: #fff !important;
+    .table {
+      margin-bottom: 0;
     }
 
-    a {
-      color: #c0c4c8 !important;
-      display: block;
-      width: 100%;
+    .table tr th:first-child {
+      padding-left: 20px;
     }
 
-    a:hover {
-      background: #494b54 !important;
+    .table tr th:last-child {
+      padding-right: 20px;
     }
   }
+
+  .navbar-nav a {
+    margin: 10px;
+  }
+
+  .navbar-nav > .open > a,
+  .navbar-nav > .open > a:hover {
+    color:#ffffff !important;
+    background-color:rgba(246,168,33,0.1) !important;;
+    border-color:#f6a821;
+  }
 }
\ No newline at end of file
diff --git a/src/app/core/index.ts b/src/app/core/index.ts
index 3f9d503..ae5796c 100644
--- a/src/app/core/index.ts
+++ b/src/app/core/index.ts
@@ -49,6 +49,7 @@
 import {xosDebugModel} from './debug/debug-model';
 import {xosConfirm} from './confirm/confirm';
 import {XosConfirm} from './confirm/confirm.service';
+import {xosServiceStatus} from './service-status/service-status';
 
 export const xosCore = 'xosCore';
 
@@ -89,5 +90,6 @@
   .component('xosDebugSummary', xosDebugSummary)
   .component('xosDebugModel', xosDebugModel)
   .component('xosConfirm', xosConfirm)
+  .component('serviceStatus', xosServiceStatus)
   .filter('pagination', PaginationFilter)
   .filter('arrayToList', ArrayToListFilter);
diff --git a/src/app/core/service-status/service-status.html b/src/app/core/service-status/service-status.html
new file mode 100644
index 0000000..665dc72
--- /dev/null
+++ b/src/app/core/service-status/service-status.html
@@ -0,0 +1,34 @@
+<!--
+Copyright 2017-present Open Networking Foundation
+
+Licensed 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.
+-->
+
+<div class="loader" ng-if="!vm.loaded"></div>
+
+<table class="table table-striped" ng-if="vm.loaded">
+  <thead>
+    <tr>
+      <th>Name</th>
+      <th>Version</th>
+      <th>State</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr ng-repeat="service in vm.services">
+      <td>{{service.name}}</td>
+      <td><code>{{service.version}}</code></td>
+      <td>{{service.state}}</td>
+    </tr>
+  </tbody>
+</table>
\ No newline at end of file
diff --git a/src/app/core/service-status/service-status.ts b/src/app/core/service-status/service-status.ts
new file mode 100644
index 0000000..05ac971
--- /dev/null
+++ b/src/app/core/service-status/service-status.ts
@@ -0,0 +1,74 @@
+
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed 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.
+ */
+
+import {IXosAppConfig} from '../../../index';
+import IHttpPromise = angular.IHttpPromise;
+
+interface IXosServiceStatus {
+  name: string;
+  state: 'load' | 'unload' | 'present';
+  version: string;
+}
+
+interface IXosServiceStatusResponse {
+  model_output: string;
+  model_status: number;
+  services: IXosServiceStatus[];
+}
+
+class XosServiceStatusController {
+
+  static $inject = [
+    '$log',
+    '$http',
+    '$interval',
+    'AppConfig'
+  ];
+
+  public services: IXosServiceStatus[] = [];
+  public error: boolean;
+  public loaded: boolean = false;
+
+  constructor (
+    private $log: angular.ILogService,
+    private $http: angular.IHttpService,
+    private $interval: ng.IIntervalService,
+    private AppConfig: IXosAppConfig,
+  ) {
+    this.$interval(() => {
+      this.getServiceStatus()
+        .then(res => {
+          this.services = res.data.services;
+          this.loaded = true;
+        })
+        .catch(e => {
+          this.error = true;
+          this.$log.error(`[XosServiceStatus] Cannot read status from the backend`, e);
+        });
+    }, 10 * 1000);
+  }
+
+  private getServiceStatus(): IHttpPromise<IXosServiceStatusResponse> {
+    return this.$http.get(`${this.AppConfig.apiEndpoint}/dynamicload/load_status`);
+  }
+}
+
+export const xosServiceStatus: angular.IComponentOptions = {
+  template: require('./service-status.html'),
+  controllerAs: 'vm',
+  controller: XosServiceStatusController,
+};