introduced PostId and PostStatus and changed naming from Storage to Persistence

More/Repository/InMemoryPersistence.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace DesignPatterns\More\Repository;
+
+class InMemoryPersistence implements Persistence
+{
+    /**
+     * @var array
+     */
+    private $data = [];
+
+    /**
+     * @var int
+     */
+    private $lastId = 0;
+
+    public function generateId(): int
+    {
+        $this->lastId++;
+
+        return $this->lastId;
+    }
+
+    public function persist(array $data)
+    {
+        $this->data[$this->lastId] = $data;
+    }
+
+    public function retrieve(int $id): array
+    {
+        if (!isset($this->data[$id])) {
+            throw new \OutOfBoundsException(sprintf('No data found for ID %d', $id));
+        }
+
+        return $this->data[$id];
+    }
+
+    public function delete(int $id)
+    {
+        if (!isset($this->data[$id])) {
+            throw new \OutOfBoundsException(sprintf('No data found for ID %d', $id));
+        }
+
+        unset($this->data[$id]);
+    }
+}