Add get.php support

Model/File/Storage/Bucket.php

@@ -157,6 +157,9 @@ public function loadByFilename(string $filename)
         /** @var string $relativePath */
         $relativePath = $this->storageHelper->getMediaRelativePath($filename);
 
+        // @todo look up media path like https://github.com/magento/magento2/blob/2.4-develop/app/code/Magento/MediaStorage/App/Media.php#L187
+        $relativePath = str_replace('media/', '', $relativePath);
+
         if ($this->getStorage()->objectExists($relativePath)) {
             $this->setData('id', $filename);
             $this->setData('filename', $filename);

Model/File/Storage/Synchronization.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace AuroraExtensions\GoogleCloudStorage\Model\File\Storage;
+
+use Magento\Framework\Exception\FileSystemException;
+use Magento\Framework\Filesystem\Directory\WriteInterface as DirectoryWrite;
+
+class Synchronization
+{
+    /**
+     * @var BucketFactory
+     */
+    protected $bucket;
+
+    /**
+     * File stream handler
+     *
+     * @var DirectoryWrite
+     */
+    protected $mediaDirectory;
+
+    public function __construct(
+        DirectoryWrite $directory,
+        BucketFactory $bucket
+    ) {
+        $this->mediaDirectory = $directory;
+        $this->bucket = $bucket;
+    }
+
+    /**
+     * Synchronize file from GCS to local filesystem
+     *
+     * @param string $relativeFileName
+     * @return void
+     */
+    public function synchronize($relativeFileName)
+    {
+        $storage = $this->bucket->loadByFilename($relativeFileName);
+
+        if ($storage->getId()) {
+            $file = $this->mediaDirectory->openFile($relativeFileName, 'w');
+            try {
+                $file->lock();
+                $file->write($storage->getContent());
+                $file->unlock();
+                $file->close();
+            } catch (FileSystemException $e) {
+                $file->close();
+            }
+        }
+    }
+}

etc/di.xml

@@ -20,6 +20,9 @@
     <preference for="AuroraExtensions\GoogleCloudStorage\Api\StorageObjectManagementInterface"
                 type="AuroraExtensions\GoogleCloudStorage\Model\Adapter\StorageObjectManagement"/>
 
+    <preference for="Magento\MediaStorage\Model\File\Storage\Synchronization"
+                type="AuroraExtensions\GoogleCloudStorage\Model\File\Storage\Synchronization"/>
+
     <virtualType name="AuroraExtensions\GoogleCloudStorage\Model\System\Source\Select\Bucket\Acl"
                  type="AuroraExtensions\ModuleComponents\Model\Config\Source\Select\VirtualSelect">
         <arguments>