Really same artist/album + stats

dashboard/src/app/els.service.ts

@@ -162,6 +162,27 @@ export class ElsService {
       });
   }
 
+  getArtistAlbums(artistName: string): Observable<string[]> {
+    return this.http
+      .post(this.elsUrl + "artist/_search",
+            JSON.stringify({"fields": "Album","query":{"match_phrase":{"Artist":artistName}},"size": ElsService.DEFAULT_SIZE}),
+            {headers: this.headers})
+      .map(res => res.json().hits.hits)
+      .map((hits: Array<any>) => {
+        // Theorically, my script prevent to found two documents with this query.
+        // But Prevention is better than cure as Shakespeare said
+        if (hits.length < 1) {
+          console.info('No artist "' + artistName + '" found.');
+          return undefined;
+        }
+        if (hits.length > 1) {
+          console.error('More than one artist "' + artistName + '" found, return the first.');
+          console.error('This is not normal!')
+        }
+        return hits[0].fields.Album;
+      });
+  }
+
   private handleError(error: any): Promise<any> {
     console.error('An error occurred', error); // for demo purposes only
     return Promise.reject(error.message || error);