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vendor/symfony/translation/Dumper/IcuResFileDumper.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\Dumper;
+
+use Symfony\Component\Translation\MessageCatalogue;
+
+/**
+ * IcuResDumper generates an ICU ResourceBundle formatted string representation of a message catalogue.
+ *
+ * @author Stealth35
+ */
+class IcuResFileDumper extends FileDumper
+{
+    protected $relativePathTemplate = '%domain%/%locale%.%extension%';
+
+    public function formatCatalogue(MessageCatalogue $messages, string $domain, array $options = []): string
+    {
+        $data = $indexes = $resources = '';
+
+        foreach ($messages->all($domain) as $source => $target) {
+            $indexes .= pack('v', \strlen($data) + 28);
+            $data .= $source."\0";
+        }
+
+        $data .= $this->writePadding($data);
+
+        $keyTop = $this->getPosition($data);
+
+        foreach ($messages->all($domain) as $source => $target) {
+            $resources .= pack('V', $this->getPosition($data));
+
+            $data .= pack('V', \strlen($target))
+                .mb_convert_encoding($target."\0", 'UTF-16LE', 'UTF-8')
+                .$this->writePadding($data)
+            ;
+        }
+
+        $resOffset = $this->getPosition($data);
+
+        $data .= pack('v', \count($messages->all($domain)))
+            .$indexes
+            .$this->writePadding($data)
+            .$resources
+        ;
+
+        $bundleTop = $this->getPosition($data);
+
+        $root = pack('V7',
+            $resOffset + (2 << 28), // Resource Offset + Resource Type
+            6,                      // Index length
+            $keyTop,                        // Index keys top
+            $bundleTop,                     // Index resources top
+            $bundleTop,                     // Index bundle top
+            \count($messages->all($domain)), // Index max table length
+            0                               // Index attributes
+        );
+
+        $header = pack('vC2v4C12@32',
+            32,                     // Header size
+            0xDA, 0x27,             // Magic number 1 and 2
+            20, 0, 0, 2,            // Rest of the header, ..., Size of a char
+            0x52, 0x65, 0x73, 0x42, // Data format identifier
+            1, 2, 0, 0,             // Data version
+            1, 4, 0, 0              // Unicode version
+        );
+
+        return $header.$root.$data;
+    }
+
+    private function writePadding(string $data): ?string
+    {
+        $padding = \strlen($data) % 4;
+
+        return $padding ? str_repeat("\xAA", 4 - $padding) : null;
+    }
+
+    private function getPosition(string $data): float|int
+    {
+        return (\strlen($data) + 28) / 4;
+    }
+
+    protected function getExtension(): string
+    {
+        return 'res';
+    }
+}