Fix load data pbl

dashboard/src/app/album/album.component.ts

@@ -22,6 +22,7 @@ export class AlbumComponent implements OnInit {
 
   // Prevent useless data load + activate button in interface var
   moreDataAvailable = true;
+  lockLoadData = false;
 
   constructor(
     private elsService: ElsService,
@@ -39,10 +40,16 @@ export class AlbumComponent implements OnInit {
   }
 
   loadSongs(): void {
+    if (this.lockLoadData) {
+      console.log('Loading data locked');
+      return;
+    }
+
     if (!this.moreDataAvailable) {
       return;
     }
 
+    this.lockLoadData = true;
     this.elsService.getAlbumSongs(this.albumName, this.songs.length).subscribe(
       data => {
         this.moreDataAvailable = data.length === ElsService.DEFAULT_SIZE;
@@ -57,6 +64,8 @@ export class AlbumComponent implements OnInit {
             this.songs.push(song);
           });
         }
+        console.log('Unlock load data');
+        this.lockLoadData = false;
       }
     );
   }