copy common ts code over from browser repo

src/models/domain/folder.ts

@@ -0,0 +1,34 @@
+import { FolderData } from '../data/folderData';
+
+import { CipherString } from './cipherString';
+import Domain from './domain';
+
+class Folder extends Domain {
+    id: string;
+    name: CipherString;
+
+    constructor(obj?: FolderData, alreadyEncrypted: boolean = false) {
+        super();
+        if (obj == null) {
+            return;
+        }
+
+        this.buildDomainModel(this, obj, {
+            id: null,
+            name: null,
+        }, alreadyEncrypted, ['id']);
+    }
+
+    decrypt(): Promise<any> {
+        const model = {
+            id: this.id,
+        };
+
+        return this.decryptObj(model, {
+            name: null,
+        }, null);
+    }
+}
+
+export { Folder };
+(window as any).Folder = Folder;