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vendor/symfony/translation/Loader/ArrayLoader.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Translation\Loader;
+
+use Symfony\Component\Translation\MessageCatalogue;
+
+/**
+ * ArrayLoader loads translations from a PHP array.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class ArrayLoader implements LoaderInterface
+{
+    public function load(mixed $resource, string $locale, string $domain = 'messages'): MessageCatalogue
+    {
+        $resource = $this->flatten($resource);
+        $catalogue = new MessageCatalogue($locale);
+        $catalogue->add($resource, $domain);
+
+        return $catalogue;
+    }
+
+    /**
+     * Flattens an nested array of translations.
+     *
+     * The scheme used is:
+     *   'key' => ['key2' => ['key3' => 'value']]
+     * Becomes:
+     *   'key.key2.key3' => 'value'
+     */
+    private function flatten(array $messages): array
+    {
+        $result = [];
+        foreach ($messages as $key => $value) {
+            if (\is_array($value)) {
+                foreach ($this->flatten($value) as $k => $v) {
+                    if (null !== $v) {
+                        $result[$key.'.'.$k] = $v;
+                    }
+                }
+            } elseif (null !== $value) {
+                $result[$key] = $value;
+            }
+        }
+
+        return $result;
+    }
+}