@@ -0,0 +1,722 @@
+package com.google.sps.data;%0A%0Aimport com.google.appengine.api.datastore.Key;%0Aimport com.google.appengine.api.datastore.Entity;%0Aimport com.google.sps.service.DatabaseService;%0Aimport java.util.Date;%0A%0Apublic abstract class Lesson %7B%0A%0A    public static final String LESSON_ENTITY_NAME = %22Lesson%22;%0A    public static final String ISDRAFT_PROPERTY_KEY = %22isDraft%22;%0A    public static final String TITLE_PROPERTY_KEY = %22title%22;%0A    public static final String DESCRIPTION_PROPERTY_KEY = %22description%22;%0A    // public static final String TAGS_PROPERTY_KEY = %22tags%22;%0A    public static final String DATE_PROPERTY_KEY = %22date%22;%0A%0A    private Entity delegate;%0A%0A    public Lesson(Entity delegate) %7B%0A        this.delegate = delegate;%0A    %7D%0A%0A%7D

Create Lesson File