Remove one N+1 by fetching TechnicalDataSets

lib/Alchemy/Phrasea/Media/RecordTechnicalDataSetRepositoryProvider.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2016 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Alchemy\Phrasea\Media;
+
+class RecordTechnicalDataSetRepositoryProvider
+{
+    /**
+     * @var RecordTechnicalDataSetRepository[]
+     */
+    private $repositories = [];
+
+    /**
+     * @var RecordTechnicalDataSetRepositoryFactory
+     */
+    private $factory;
+
+    public function __construct(RecordTechnicalDataSetRepositoryFactory $factory)
+    {
+        $this->factory = $factory;
+    }
+
+    /**
+     * @param int $databoxId
+     * @return RecordTechnicalDataSetRepository
+     */
+    public function getRepositoryFor($databoxId)
+    {
+        if (!isset($this->repositories[$databoxId])) {
+            $this->repositories[$databoxId] = $this->factory->createRepositoryForDatabox($databoxId);
+        }
+
+        return $this->repositories[$databoxId];
+    }
+}