ensure parameter node id is a folder instance (#166)

src/app/components/files/files.component.spec.ts

@@ -77,7 +77,7 @@ describe('FilesComponent', () => {
     }));
 
     beforeEach(() => {
-        node = { id: 'node-id' };
+        node = { id: 'node-id', isFolder: true };
         page = {
             list: {
                 entries: ['a', 'b', 'c'],
@@ -134,6 +134,17 @@ describe('FilesComponent', () => {
 
             expect(component.onFetchError).toHaveBeenCalled();
         });
+
+        it('if should navigate to parent if node is not a folder', () => {
+            node.isFolder = false;
+            node.parentId = 'parent-id';
+            spyOn(component, 'fetchNode').and.returnValue(Observable.of(node));
+            spyOn(router, 'navigate');
+
+            fixture.detectChanges();
+
+            expect(router.navigate).toHaveBeenCalledWith([ '/personal-files', 'parent-id' ]);
+        });
     });
 
     describe('refresh on events', () => {

src/app/components/files/files.component.ts

@@ -76,7 +76,13 @@ export class FilesComponent extends PageComponent implements OnInit, OnDestroy {
             this.isLoading = true;
 
             this.fetchNode(nodeId)
-                .do((node) => this.updateCurrentNode(node))
+                .do((node) => {
+                    if (node.isFolder) {
+                        this.updateCurrentNode(node);
+                    } else {
+                        this.router.navigate(['/personal-files', node.parentId]);
+                    }
+                })
                 .flatMap((node) => this.fetchNodes(node.id))
                 .subscribe(
                     (page) => {