[stable26] SystemTags endpoint to return tags used by a user with meta data

apps/dav/composer/composer/autoload_classmap.php

@@ -304,6 +304,7 @@
     'OCA\\DAV\\SystemTag\\SystemTagNode' => $baseDir . '/../lib/SystemTag/SystemTagNode.php',
     'OCA\\DAV\\SystemTag\\SystemTagPlugin' => $baseDir . '/../lib/SystemTag/SystemTagPlugin.php',
     'OCA\\DAV\\SystemTag\\SystemTagsByIdCollection' => $baseDir . '/../lib/SystemTag/SystemTagsByIdCollection.php',
+    'OCA\\DAV\\SystemTag\\SystemTagsInUseCollection' => $baseDir . '/../lib/SystemTag/SystemTagsInUseCollection.php',
     'OCA\\DAV\\SystemTag\\SystemTagsObjectMappingCollection' => $baseDir . '/../lib/SystemTag/SystemTagsObjectMappingCollection.php',
     'OCA\\DAV\\SystemTag\\SystemTagsObjectTypeCollection' => $baseDir . '/../lib/SystemTag/SystemTagsObjectTypeCollection.php',
     'OCA\\DAV\\SystemTag\\SystemTagsRelationsCollection' => $baseDir . '/../lib/SystemTag/SystemTagsRelationsCollection.php',

apps/dav/composer/composer/autoload_static.php

@@ -319,6 +319,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\SystemTag\\SystemTagNode' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagNode.php',
         'OCA\\DAV\\SystemTag\\SystemTagPlugin' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagPlugin.php',
         'OCA\\DAV\\SystemTag\\SystemTagsByIdCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsByIdCollection.php',
+        'OCA\\DAV\\SystemTag\\SystemTagsInUseCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsInUseCollection.php',
         'OCA\\DAV\\SystemTag\\SystemTagsObjectMappingCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsObjectMappingCollection.php',
         'OCA\\DAV\\SystemTag\\SystemTagsObjectTypeCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsObjectTypeCollection.php',
         'OCA\\DAV\\SystemTag\\SystemTagsRelationsCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsRelationsCollection.php',

apps/dav/lib/RootCollection.php

@@ -48,6 +48,7 @@
 use OCP\App\IAppManager;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Files\IRootFolder;
 use OCP\IConfig;
 use Psr\Log\LoggerInterface;
 use Sabre\DAV\SimpleCollection;
@@ -65,6 +66,7 @@ public function __construct() {
 		$dispatcher = \OC::$server->get(IEventDispatcher::class);
 		$config = \OC::$server->get(IConfig::class);
 		$proxyMapper = \OC::$server->query(ProxyMapper::class);
+		$rootFolder = \OCP\Server::get(IRootFolder::class);
 
 		$userPrincipalBackend = new Principal(
 			$userManager,
@@ -131,6 +133,7 @@ public function __construct() {
 			$groupManager,
 			\OC::$server->getEventDispatcher()
 		);
+		$systemTagInUseCollection = \OCP\Server::get(SystemTag\SystemTagsInUseCollection::class);
 		$commentsCollection = new Comments\RootCollection(
 			\OC::$server->getCommentsManager(),
 			$userManager,
@@ -179,6 +182,7 @@ public function __construct() {
 				$systemAddressBookRoot]),
 			$systemTagCollection,
 			$systemTagRelationsCollection,
+			$systemTagInUseCollection,
 			$commentsCollection,
 			$uploadCollection,
 			$avatarCollection,

apps/dav/lib/SystemTag/SystemTagNode.php

@@ -64,6 +64,9 @@ class SystemTagNode implements \Sabre\DAV\INode {
 	 */
 	protected $isAdmin;
 
+	protected int $numberOfFiles = -1;
+	protected int $referenceFileId = -1;
+
 	/**
 	 * Sets up the node, expects a full path name
 	 *
@@ -172,4 +175,20 @@ public function delete() {
 			throw new NotFound('Tag with id ' . $this->tag->getId() . ' not found', 0, $e);
 		}
 	}
+
+	public function getNumberOfFiles(): int {
+		return $this->numberOfFiles;
+	}
+
+	public function setNumberOfFiles(int $numberOfFiles): void {
+		$this->numberOfFiles = $numberOfFiles;
+	}
+
+	public function getReferenceFileId(): int {
+		return $this->referenceFileId;
+	}
+
+	public function setReferenceFileId(int $referenceFileId): void {
+		$this->referenceFileId = $referenceFileId;
+	}
 }

apps/dav/lib/SystemTag/SystemTagPlugin.php

@@ -56,6 +56,8 @@ class SystemTagPlugin extends \Sabre\DAV\ServerPlugin {
 	public const USERASSIGNABLE_PROPERTYNAME = '{http://owncloud.org/ns}user-assignable';
 	public const GROUPS_PROPERTYNAME = '{http://owncloud.org/ns}groups';
 	public const CANASSIGN_PROPERTYNAME = '{http://owncloud.org/ns}can-assign';
+	public const NUM_FILES_PROPERTYNAME = '{http://nextcloud.org/ns}files-assigned';
+	public const FILEID_PROPERTYNAME = '{http://nextcloud.org/ns}reference-fileid';
 
 	/**
 	 * @var \Sabre\DAV\Server $server
@@ -224,6 +226,11 @@ public function handleGetProperties(
 			return;
 		}
 
+		// child nodes from systemtags-assigned should point to normal tag endpoint
+		if (preg_match('/^systemtags-assigned\/[0-9]+/', $propFind->getPath())) {
+			$propFind->setPath(str_replace('systemtags-assigned/', 'systemtags/', $propFind->getPath()));
+		}
+
 		$propFind->handle(self::ID_PROPERTYNAME, function () use ($node) {
 			return $node->getSystemTag()->getId();
 		});
@@ -258,6 +265,16 @@ public function handleGetProperties(
 			}
 			return implode('|', $groups);
 		});
+
+		if ($node instanceof SystemTagNode) {
+			$propFind->handle(self::NUM_FILES_PROPERTYNAME, function () use ($node): int {
+				return $node->getNumberOfFiles();
+			});
+
+			$propFind->handle(self::FILEID_PROPERTYNAME, function () use ($node): int {
+				return $node->getReferenceFileId();
+			});
+		}
 	}
 
 	/**
@@ -279,6 +296,8 @@ public function handleUpdateProperties($path, PropPatch $propPatch) {
 			self::USERVISIBLE_PROPERTYNAME,
 			self::USERASSIGNABLE_PROPERTYNAME,
 			self::GROUPS_PROPERTYNAME,
+			self::NUM_FILES_PROPERTYNAME,
+			self::FILEID_PROPERTYNAME,
 		], function ($props) use ($node) {
 			$tag = $node->getSystemTag();
 			$name = $tag->getName();
@@ -315,6 +334,11 @@ public function handleUpdateProperties($path, PropPatch $propPatch) {
 				$this->tagManager->setTagGroups($tag, $groupIds);
 			}
 
+			if (isset($props[self::NUM_FILES_PROPERTYNAME]) || isset($props[self::FILEID_PROPERTYNAME])) {
+				// read-only properties
+				throw new Forbidden();
+			}
+
 			if ($updateTag) {
 				$node->update($name, $userVisible, $userAssignable);
 			}

apps/dav/lib/SystemTag/SystemTagsInUseCollection.php

@@ -0,0 +1,108 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2023 Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\SystemTag;
+
+use OC\SystemTag\SystemTag;
+use OC\SystemTag\SystemTagsInFilesDetector;
+use OC\User\NoUserException;
+use OCP\Files\IRootFolder;
+use OCP\Files\NotPermittedException;
+use OCP\IUserSession;
+use OCP\SystemTag\ISystemTagManager;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\SimpleCollection;
+
+class SystemTagsInUseCollection extends SimpleCollection {
+	protected IUserSession $userSession;
+	protected IRootFolder $rootFolder;
+	protected string $mediaType;
+	protected ISystemTagManager $systemTagManager;
+	protected SystemTagsInFilesDetector $systemTagsInFilesDetector;
+
+	/** @noinspection PhpMissingParentConstructorInspection */
+	public function __construct(
+		IUserSession $userSession,
+		IRootFolder $rootFolder,
+		ISystemTagManager $systemTagManager,
+		SystemTagsInFilesDetector $systemTagsInFilesDetector,
+		string $mediaType = ''
+	) {
+		$this->userSession = $userSession;
+		$this->rootFolder = $rootFolder;
+		$this->systemTagManager = $systemTagManager;
+		$this->mediaType = $mediaType;
+		$this->systemTagsInFilesDetector = $systemTagsInFilesDetector;
+		$this->name = 'systemtags-assigned';
+		if ($this->mediaType != '') {
+			$this->name .= '/' . $this->mediaType;
+		}
+	}
+
+	public function setName($name): void {
+		throw new Forbidden('Permission denied to rename this collection');
+	}
+
+	public function getChild($name): self {
+		if ($this->mediaType !== '') {
+			throw new NotFound('Invalid media type');
+		}
+		return new self($this->userSession, $this->rootFolder, $this->systemTagManager, $this->systemTagsInFilesDetector, $name);
+	}
+
+	/**
+	 * @return SystemTagNode[]
+	 * @throws NotPermittedException
+	 * @throws Forbidden
+	 */
+	public function getChildren(): array {
+		$user = $this->userSession->getUser();
+		$userFolder = null;
+		try {
+			if ($user) {
+				$userFolder = $this->rootFolder->getUserFolder($user->getUID());
+			}
+		} catch (NoUserException) {
+			// will throw a Sabre exception in the next step.
+		}
+		if ($user === null || $userFolder === null) {
+			throw new Forbidden('Permission denied to read this collection');
+		}
+
+		$result = $this->systemTagsInFilesDetector->detectAssignedSystemTagsIn($userFolder, $this->mediaType);
+		$children = [];
+		foreach ($result as $tagData) {
+			$tag = new SystemTag((string)$tagData['id'], $tagData['name'], (bool)$tagData['visibility'], (bool)$tagData['editable']);
+			// read only, so we can submit the isAdmin parameter as false generally
+			$node = new SystemTagNode($tag, $user, false, $this->systemTagManager);
+			$node->setNumberOfFiles($tagData['number_files']);
+			$node->setReferenceFileId($tagData['ref_file_id']);
+			$children[] = $node;
+		}
+		return $children;
+	}
+}

lib/composer/composer/autoload_classmap.php

@@ -1592,6 +1592,7 @@
     'OC\\SystemTag\\SystemTag' => $baseDir . '/lib/private/SystemTag/SystemTag.php',
     'OC\\SystemTag\\SystemTagManager' => $baseDir . '/lib/private/SystemTag/SystemTagManager.php',
     'OC\\SystemTag\\SystemTagObjectMapper' => $baseDir . '/lib/private/SystemTag/SystemTagObjectMapper.php',
+    'OC\\SystemTag\\SystemTagsInFilesDetector' => $baseDir . '/lib/private/SystemTag/SystemTagsInFilesDetector.php',
     'OC\\TagManager' => $baseDir . '/lib/private/TagManager.php',
     'OC\\Tagging\\Tag' => $baseDir . '/lib/private/Tagging/Tag.php',
     'OC\\Tagging\\TagMapper' => $baseDir . '/lib/private/Tagging/TagMapper.php',

lib/composer/composer/autoload_static.php

@@ -1625,6 +1625,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\SystemTag\\SystemTag' => __DIR__ . '/../../..' . '/lib/private/SystemTag/SystemTag.php',
         'OC\\SystemTag\\SystemTagManager' => __DIR__ . '/../../..' . '/lib/private/SystemTag/SystemTagManager.php',
         'OC\\SystemTag\\SystemTagObjectMapper' => __DIR__ . '/../../..' . '/lib/private/SystemTag/SystemTagObjectMapper.php',
+        'OC\\SystemTag\\SystemTagsInFilesDetector' => __DIR__ . '/../../..' . '/lib/private/SystemTag/SystemTagsInFilesDetector.php',
         'OC\\TagManager' => __DIR__ . '/../../..' . '/lib/private/TagManager.php',
         'OC\\Tagging\\Tag' => __DIR__ . '/../../..' . '/lib/private/Tagging/Tag.php',
         'OC\\Tagging\\TagMapper' => __DIR__ . '/../../..' . '/lib/private/Tagging/TagMapper.php',

lib/private/Files/Cache/CacheQueryBuilder.php

@@ -41,8 +41,27 @@ public function __construct(IDBConnection $connection, SystemConfig $systemConfi
 		parent::__construct($connection, $systemConfig, $logger);
 	}
 
+	public function selectTagUsage(): self {
+		$this
+			->select('systemtag.name', 'systemtag.id', 'systemtag.visibility', 'systemtag.editable')
+			->selectAlias($this->createFunction('COUNT(filecache.fileid)'), 'number_files')
+			->selectAlias($this->createFunction('MAX(filecache.fileid)'), 'ref_file_id')
+			->from('filecache', 'filecache')
+			->leftJoin('filecache', 'systemtag_object_mapping', 'systemtagmap', $this->expr()->andX(
+				$this->expr()->eq('filecache.fileid', $this->expr()->castColumn('systemtagmap.objectid', IQueryBuilder::PARAM_INT)),
+				$this->expr()->eq('systemtagmap.objecttype', $this->createNamedParameter('files'))
+			))
+			->leftJoin('systemtagmap', 'systemtag', 'systemtag', $this->expr()->andX(
+				$this->expr()->eq('systemtag.id', 'systemtagmap.systemtagid'),
+				$this->expr()->eq('systemtag.visibility', $this->createNamedParameter(true))
+			))
+			->groupBy('systemtag.name', 'systemtag.id', 'systemtag.visibility', 'systemtag.editable');
+
+		return $this;
+	}
+
 	public function selectFileCache(string $alias = null, bool $joinExtendedCache = true) {
-		$name = $alias ? $alias : 'filecache';
+		$name = $alias ?: 'filecache';
 		$this->select("$name.fileid", 'storage', 'path', 'path_hash', "$name.parent", "$name.name", 'mimetype', 'mimepart', 'size', 'mtime',
 			'storage_mtime', 'encrypted', 'etag', 'permissions', 'checksum', 'unencrypted_size')
 			->from('filecache', $name);