From 8a22641ce04cfa3497a3db340d1c39cafc3e0be3 Mon Sep 17 00:00:00 2001
From: MartkCz <martk494@gmail.com>
Date: Wed, 30 Dec 2020 13:58:38 +0100
Subject: [PATCH] FetchByIdentifiers

---
 src/FetchByIdentifiers.php | 43 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 src/FetchByIdentifiers.php

diff --git a/src/FetchByIdentifiers.php b/src/FetchByIdentifiers.php
new file mode 100644
index 0000000..beca289
--- /dev/null
+++ b/src/FetchByIdentifiers.php
@@ -0,0 +1,43 @@
+<?php declare(strict_types = 1);
+
+namespace Utilitte\Doctrine;
+
+use Doctrine\ORM\EntityManagerInterface;
+use LogicException;
+use Utilitte\Php\ArraySort;
+
+final class FetchByIdentifiers
+{
+
+	private EntityManagerInterface $em;
+
+	public function __construct(EntityManagerInterface $em)
+	{
+		$this->em = $em;
+	}
+
+	public function fetch(string $entity, array $ids): array
+	{
+		$metadata = $this->em->getClassMetadata($entity);
+		$identifiers = $metadata->getIdentifierFieldNames();
+		if (count($identifiers) !== 1) {
+			throw new LogicException(sprintf('%s entity must have one identifier', $entity));
+		}
+		$column = $identifiers[0];
+
+		$result = $this->em->createQueryBuilder()
+			->select('e')
+			->from($entity, 'e')
+			->where(sprintf('e.%s IN(:ids)', $column))
+			->setParameter('ids', $ids)
+			->getQuery()
+			->getResult();
+
+		return ArraySort::byGivenValues(
+			$ids,
+			$result,
+			fn (object $entity) => $metadata->getIdentifierValues($entity)[$column]
+		);
+	}
+
+}