Added dav plugin to be able to query organizationId and resourceId of filesystem node from frontend

lib/Dav/PropFindPlugin.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\OrganizationFolders\Dav;
+
+use Sabre\DAV\Server;
+use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\INode;
+use Sabre\DAV\PropFind;
+
+use OCA\DAV\Connector\Sabre\Node;
+use OCA\GroupFolders\Folder\FolderManager;
+use OCA\GroupFolders\Mount\GroupMountPoint;
+
+use OCA\OrganizationFolders\Service\ResourceService;
+
+class PropFindPlugin extends ServerPlugin {
+	public const ORGANIZATION_FOLDER_ID_PROPERTYNAME = '{http://verdigado.com/ns}organization-folder-id';
+	public const ORGANIZATION_FOLDER_RESOURCE_ID_PROPERTYNAME = '{http://verdigado.com/ns}organization-folder-resource-id';
+
+	public function __construct(
+		private FolderManager $folderManager,
+		private ResourceService $resourceService,
+	) {
+	}
+
+	public function initialize(Server $server): void {
+		$server->on('propFind', $this->propFind(...));
+	}
+
+	public function propFind(PropFind $propFind, INode $node): void {
+		if (!$node instanceof Node) {
+			return;
+		}
+
+		$fileInfo = $node->getFileInfo();
+		$mount = $fileInfo->getMountPoint();
+
+		if (!$mount instanceof GroupMountPoint) {
+			return;
+		}
+
+		$propFind->handle(self::ORGANIZATION_FOLDER_ID_PROPERTYNAME, function () use ($fileInfo): int {
+			return $this->folderManager->getFolderByPath($fileInfo->getPath());
+		});
+
+		$propFind->handle(self::ORGANIZATION_FOLDER_RESOURCE_ID_PROPERTYNAME, function () use ($node): ?int {
+			try {
+				return $this->resourceService->findByFileId($node->getId())->getId();
+			} catch (\Exception $e) {
+				return null;
+			}
+		});
+	}
+}