implementing directory listing

common/entities/Directory.ts

@@ -0,0 +1,10 @@
+import {Photo} from "./Photo";
+export class Directory{
+    
+    constructor(public id:number,
+                public name:string,
+                public path:string,
+                public lastUpdate:Date,
+                public directories:Array<Directory>,
+                public photos:Array<Photo>){}
+}

common/entities/Photo.ts

@@ -0,0 +1,4 @@
+
+export class Photo{
+    constructor(public id:number,public name:string){}
+}