WIP Simplify ELS Service

Next step: use function

dashboard/src/app/els.service.ts

@@ -101,8 +101,6 @@ export class ElsService {
   getMostPlayedTrack(): Observable<Song[]> {
     // Thank to http://chariotsolutions.com/blog/post/angular2-observables-http-separating-services-components/
     // for the map part
-
-    // Could be shorter but I think it's more readable like this.
     return this.http
       .post(this.elsUrl + 'song' + ElsService.ACTION_SEARCH,
             JSON.stringify({
@@ -114,23 +112,12 @@ export class ElsService {
               'size': 5
             }), {headers: this.headers})
       .map(res => {
-        return res.json().hits.hits;
-      })
-      .map((hits: Array<any>) => {
         const result: Array<Song> = [];
-        hits.forEach((hit) => {
-          result.push(hit._source);
+        res.json().hits.hits.forEach(element => {
+          result.push(element._source);
         });
         return result;
       });
-      // Shorter way:
-      // .map(res => {
-      //   let result: Array<Song> = [];
-      //   res.json().hits.hits.forEach(element => {
-      //     result.push(element._source);
-      //   });
-      //   return result;
-      // });
   }
 
   getAlbumSongs(albumName: string, from: number = 0): Observable<Song[]> {
@@ -145,11 +132,8 @@ export class ElsService {
               'from': from
             }), {headers: this.headers})
       .map(res => {
-        return res.json().hits.hits;
-      })
-      .map((hits: Array<any>) => {
         const result: Array<Song> = [];
-        hits.forEach((hit) => {
+        res.json().hits.hits.forEach((hit) => {
           result.push(hit._source);
         });
         return result;
@@ -169,11 +153,8 @@ export class ElsService {
               'from': from
             }), {headers: this.headers})
       .map(res => {
-        return res.json().hits.hits;
-      })
-      .map((hits: Array<any>) => {
         const result: Array<Song> = [];
-        hits.forEach((hit) => {
+        res.json().hits.hits.forEach((hit) => {
           result.push(hit._source);
         });
         return result;
@@ -197,11 +178,8 @@ export class ElsService {
               'from': from
             }), {headers: this.headers})
       .map(res => {
-        return res.json().hits.hits;
-      })
-      .map((hits: Array<any>) => {
         const result: Array<Song> = [];
-        hits.forEach((hit) => {
+        res.json().hits.hits.forEach((hit) => {
           result.push(hit._source);
         });
         return result;
@@ -310,7 +288,7 @@ export class ElsService {
                   'album' : {
                       'terms' : {
                           'field' : 'Album.original',
-                          'size': 10
+                          'size': 150
                       }
                   }
               },