Fix command callback delegation

src/app/webide/webide.component.ts

@@ -32,25 +32,49 @@ export class WebideComponent implements OnInit {
   theme = 'monokai';
   files: string[];
   saveButtonState = 'DIRTY';
+  command_handlers = { 'reload': this.reloadHandler.bind(this),
+                       'read': this.readHandler.bind(this),
+                       'select': this.selectHandler.bind(this),
+                       'write': this.writeHandler.bind(this)};
 
   constructor(private webSocketService: WebSocketService,
               private changeDetectorRef: ChangeDetectorRef) { }
 
   ngOnInit() {
+    this.subscribeWS();
+    this.requestCode();
+  }
+
+  subscribeWS() {
     this.webSocketService.observeAnchor<SourceCode>(this.anchor_id).subscribe((event) => {
+      this.command_handlers[event.data.command](event);
+      this.changeDetectorRef.detectChanges();
+    });
+  }
+
+  updateFileData(event: any) {
     this.filename = event.data.filename;
     this.code = event.data.content;
     this.language = modelist.getModeForPath(this.filename).name;
     this.files = event.data.files;
+  }
 
-      if (event.data.command === 'write') { this.saveButtonState = 'SAVED'; }
-      if (event.data.command === 'reload') { this.requestCode(); }
+  selectHandler(event: any) {
+    this.updateFileData(event);
+  }
 
-      this.changeDetectorRef.detectChanges();
-    });
+  reloadHandler(event: any) {
     this.requestCode();
   }
 
+  readHandler(event: any) {
+    this.updateFileData(event);
+  }
+
+  writeHandler(event: any) {
+    this.saveButtonState = 'SAVED';
+  }
+
   setButtonStateDirty() {
     setTimeout(() => {this.saveButtonState = 'DIRTY'; }, 0);
   }