added ChangeSet to figure out which entities are new/changed

Author: Spamercz

src/Config/Elastic.neon

@@ -11,6 +11,9 @@ services:
 	identityMap:
 		factory: Spameri\Elastic\Model\IdentityMap
 
+	changeSet:
+		factory: Spameri\Elastic\Model\ChangeSet
+
 	versionProvider:
 		factory: Spameri\Elastic\Model\VersionProvider(%version%)
 

src/Model/ChangeSet.php

@@ -0,0 +1,29 @@
+<?php declare(strict_types = 1);
+
+namespace Spameri\Elastic\Model;
+
+class ChangeSet
+{
+
+	/**
+	 * @var array<string, array<string, bool>>
+	 */
+	public array $created = [];
+
+
+	public function markExisting(
+		object $entity,
+	): void
+	{
+		$this->created[$entity::class][\spl_object_hash($entity)] = true;
+	}
+
+
+	public function isExisting(
+		object $entity,
+	): bool
+	{
+		return isset($this->created[$entity::class][\spl_object_hash($entity)]);
+	}
+
+}