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vendor/symfony/translation/Loader/IcuResFileLoader.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\Config\Resource\DirectoryResource;
+use Symfony\Component\Translation\Exception\InvalidResourceException;
+use Symfony\Component\Translation\Exception\NotFoundResourceException;
+use Symfony\Component\Translation\MessageCatalogue;
+
+/**
+ * IcuResFileLoader loads translations from a resource bundle.
+ *
+ * @author stealth35
+ */
+class IcuResFileLoader implements LoaderInterface
+{
+    public function load(mixed $resource, string $locale, string $domain = 'messages'): MessageCatalogue
+    {
+        if (!stream_is_local($resource)) {
+            throw new InvalidResourceException(sprintf('This is not a local file "%s".', $resource));
+        }
+
+        if (!is_dir($resource)) {
+            throw new NotFoundResourceException(sprintf('File "%s" not found.', $resource));
+        }
+
+        try {
+            $rb = new \ResourceBundle($locale, $resource);
+        } catch (\Exception) {
+            $rb = null;
+        }
+
+        if (!$rb) {
+            throw new InvalidResourceException(sprintf('Cannot load resource "%s".', $resource));
+        } elseif (intl_is_failure($rb->getErrorCode())) {
+            throw new InvalidResourceException($rb->getErrorMessage(), $rb->getErrorCode());
+        }
+
+        $messages = $this->flatten($rb);
+        $catalogue = new MessageCatalogue($locale);
+        $catalogue->add($messages, $domain);
+
+        if (class_exists(DirectoryResource::class)) {
+            $catalogue->addResource(new DirectoryResource($resource));
+        }
+
+        return $catalogue;
+    }
+
+    /**
+     * Flattens an ResourceBundle.
+     *
+     * The scheme used is:
+     *   key { key2 { key3 { "value" } } }
+     * Becomes:
+     *   'key.key2.key3' => 'value'
+     *
+     * This function takes an array by reference and will modify it
+     *
+     * @param \ResourceBundle $rb       The ResourceBundle that will be flattened
+     * @param array           $messages Used internally for recursive calls
+     * @param string|null     $path     Current path being parsed, used internally for recursive calls
+     */
+    protected function flatten(\ResourceBundle $rb, array &$messages = [], ?string $path = null): array
+    {
+        foreach ($rb as $key => $value) {
+            $nodePath = $path ? $path.'.'.$key : $key;
+            if ($value instanceof \ResourceBundle) {
+                $this->flatten($value, $messages, $nodePath);
+            } else {
+                $messages[$nodePath] = $value;
+            }
+        }
+
+        return $messages;
+    }
+}