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

lib/AppInfo/Application.php

@@ -3,11 +3,25 @@
 namespace OCA\OrganizationFolders\AppInfo;
 
 use OCP\AppFramework\App;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
+use OCP\AppFramework\Bootstrap\IBootContext;
 
-class Application extends App {
+use OCA\DAV\Events\SabrePluginAddEvent;
+
+use OCA\OrganizationFolders\Listener\SabrePluginAddListener;
+
+class Application extends App implements IBootstrap {
 	public const APP_ID = 'organization_folders';
 
 	public function __construct() {
 		parent::__construct(self::APP_ID);
 	}
+
+	public function register(IRegistrationContext $context): void {
+		$context->registerEventListener(SabrePluginAddEvent::class, SabrePluginAddListener::class);
+	}
+
+	public function boot(IBootContext $context): void {
+	}
 }

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;
+			}
+		});
+	}
+}

lib/Db/ResourceMapper.php

@@ -44,13 +44,27 @@ class ResourceMapper extends QBMapper {
 
 		$qb->select('resource.*', 'folder.members_acl_permission', 'folder.managers_acl_permission', 'folder.inherited_acl_permission', 'folder.file_id')
 			->from(self::RESOURCES_TABLE, "resource")
-            ->where($qb->expr()->eq('id', $qb->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
+            ->where($qb->expr()->eq('resource.id', $qb->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
 
         $qb->leftJoin('resource', self::FOLDER_RESOURCES_TABLE, 'folder', $qb->expr()->eq('resource.id', 'folder.resource_id'),);
 
         return $this->findEntity($qb);
 	}
 
+    public function findByFileId(int $fileId): FolderResource {
+		/* @var $qb IQueryBuilder */
+		$qb = $this->db->getQueryBuilder();
+
+		$qb->select('resource.*', 'folder.members_acl_permission', 'folder.managers_acl_permission', 'folder.inherited_acl_permission', 'folder.file_id')
+			->from(self::RESOURCES_TABLE, "resource");
+
+        $qb->innerJoin('resource', self::FOLDER_RESOURCES_TABLE, 'folder', $qb->expr()->eq('resource.id', 'folder.resource_id'),);
+
+        $qb->where($qb->expr()->eq('folder.file_id', $qb->createNamedParameter($fileId, IQueryBuilder::PARAM_INT)));
+
+        return $this->findEntity($qb);
+    }
+
     /**
 	 * @param int $organizationFolderId
      * @param int $parentResourceId

lib/Listener/SabrePluginAddListener.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\OrganizationFolders\Listener;
+
+use OCA\DAV\Events\SabrePluginAddEvent;
+use OCA\OrganizationFolders\Dav\PropFindPlugin;
+
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+
+use Psr\Container\ContainerInterface;
+
+class SabrePluginAddListener implements IEventListener {
+	public function __construct(private ContainerInterface $container) {}
+
+	public function handle(Event $event): void {
+		if ($event instanceof SabrePluginAddEvent) {
+			$propFindPlugin = $this->container->get(PropFindPlugin::class);
+
+			$event->getServer()->addPlugin($propFindPlugin);
+		}
+	}
+}

lib/Service/ResourceService.php

@@ -55,6 +55,11 @@ class ResourceService {
 		}
 	}
 
+	public function findByFileId(int $fileId): FolderResource {
+		// TODO: improve error handling
+		return $this->mapper->findByFileId($fileId);
+	}
+
 	/* Use named arguments to call this function */
 	public function create(
 		string $type,