chapter 04: adding role and header interfaces to use in entityManager

chapter-04-the-interface-segregation-principle/refactor/entityManager.js

@@ -0,0 +1,44 @@
+/**
+ * In order to improve the understanding of this code, this file it is supposing to implement the following interfaces:
+ *
+ * interface PersistsEntitiesInterface {
+ *  function persist(entity);
+ *
+ *  function flush();
+ * }
+ *
+ * interface HasUnitOfWorkInterface {
+ *  function getUnitOfWork(name);
+ * }
+ *
+ * interface EntityManagerInterface extends PersistsEntitiesInterface, HasUnitOfWorkInterface {
+ *
+ * }
+ *
+ * Quack Quack Quack 🦆 typing :D
+ */
+
+/**
+ * @implements {EntityManagerInterface}
+ */
+function entityManager() {
+    function persist(entity) {
+        // make something here...
+    }
+
+    function flush() {
+        // make something here
+    }
+
+    function getUnitOfWork() {
+        // make something here
+    }
+
+    return {
+        persist,
+        flush,
+        getUnitOfWork,
+    };
+}
+
+module.exports = entityManager;