apply collection and folder views

src/models/view/folderView.ts

@@ -0,0 +1,16 @@
+import { View } from './view';
+
+import { Folder } from '../domain/folder';
+
+export class FolderView implements View {
+    id: string;
+    name: string;
+
+    constructor(f?: Folder) {
+        if (!f) {
+            return;
+        }
+
+        this.id = f.id;
+    }
+}