Show error on 'failed' status (#8)

src/controllers/anomaly_controller.ts

@@ -294,9 +294,14 @@ export class AnomalyController {
       anomalyType.key, 1000
     );
 
-    for await (const status of statusGenerator) {
+    for await (const data of statusGenerator) {
+      let status = data.status;
+      let error = data.errorMessage;
       if(anomalyType.status !== status) {
         anomalyType.status = status;
+        if(error !== undefined) {
+          anomalyType.error = error;
+        }
         this._emitter.emit('anomaly-type-status-change', anomalyType);
       }
       if(!anomalyType.isActiveStatus) {

src/model/anomaly.ts

@@ -26,6 +26,7 @@ export class AnomalyType {
   private _saving: boolean = false;
   private _segmentSet = new SegmentArray<AnomalySegment>();
   private _status: string;
+  private _error: string;
   private _metric: Metric;
   
   private _alertEnabled?: boolean;
@@ -101,6 +102,9 @@ export class AnomalyType {
     this._status = value;
   }
 
+  get error() { return this._error; }
+  set error(value) { this._error = value; }
+
   get isActiveStatus() {
     return this.status !== 'ready' && this.status !== 'failed';
   }

src/partials/tab_analytics.html

@@ -100,7 +100,7 @@
     <label>
       <i ng-if="anomalyType.status === 'learning'" class="grafana-tip fa fa-leanpub ng-scope" bs-tooltip="'Learning'"></i>
       <i ng-if="anomalyType.status === 'pending'" class="grafana-tip fa fa-list-ul ng-scope" bs-tooltip="'Pending'"></i>
-      <i ng-if="anomalyType.status === 'failed'" class="grafana-tip fa fa-exclamation-circle ng-scope" bs-tooltip="'Failed'"></i>
+      <i ng-if="anomalyType.status === 'failed'" class="grafana-tip fa fa-exclamation-circle ng-scope" bs-tooltip="'Error: ' + anomalyType.error"></i>
     </label>
 
   </div>

src/services/anomaly_service.ts

@@ -81,7 +81,7 @@ export class AnomalyService {
       var data = await this._backendSrv.get(
         this._backendURL + '/anomalies/status', { name: key }
       );
-      return data.status as string;
+      return data;
     }
 
     let timeout = async () => new Promise(