Introduce console command to transfer ownerships of files - refs #19154

apps/files/appinfo/register_command.php

@@ -21,5 +21,12 @@
  *
  */
 
-$application->add(new OCA\Files\Command\Scan(\OC::$server->getUserManager()));
-$application->add(new OCA\Files\Command\DeleteOrphanedFiles(\OC::$server->getDatabaseConnection()));
+$dbConnection = \OC::$server->getDatabaseConnection();
+$userManager = OC::$server->getUserManager();
+$shareManager = \OC::$server->getShareManager();
+$rootFolder = \OC::$server->getRootFolder();
+
+/** @var Symfony\Component\Console\Application $application */
+$application->add(new OCA\Files\Command\Scan($userManager));
+$application->add(new OCA\Files\Command\DeleteOrphanedFiles($dbConnection));
+$application->add(new OCA\Files\Command\TransferOwnership($userManager, $shareManager, $rootFolder));

apps/files/command/transferownership.php

@@ -0,0 +1,231 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\Files\Command;
+
+use OC\Files\Filesystem;
+use OC\Files\View;
+use OCP\Files\FileInfo;
+use OCP\Files\Folder;
+use OCP\Files\IRootFolder;
+use OCP\IUserManager;
+use OCP\Share\IManager;
+use OCP\Share\IShare;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Helper\ProgressBar;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class TransferOwnership extends Command {
+
+	/** @var IUserManager $userManager */
+	private $userManager;
+
+	/** @var IManager */
+	private $shareManager;
+
+	/** @var FileInfo[] */
+	private $allFiles = [];
+
+	/** @var FileInfo[] */
+	private $encryptedFiles = [];
+
+	/** @var IShare[] */
+	private $shares = [];
+
+	/** @var string */
+	private $sourceUser;
+
+	/** @var string */
+	private $destinationUser;
+
+	/** @var string */
+	private $finalTarget;
+
+	/** @var IRootFolder */
+	private $rootFolder;
+
+	public function __construct(IUserManager $userManager, IManager $shareManager, IRootFolder $rootFolder) {
+		$this->userManager = $userManager;
+		$this->shareManager = $shareManager;
+		$this->rootFolder = $rootFolder;
+		parent::__construct();
+	}
+
+	protected function configure() {
+		$this
+			->setName('files:transfer-ownership')
+			->setDescription('move file and folder from one user to another')
+			->addArgument(
+				'source-user',
+				InputArgument::REQUIRED,
+				'owner of files which shall be moved'
+			)
+			->addArgument(
+				'destination-user',
+				InputArgument::REQUIRED,
+				'user who will be the new owner of the files'
+			);
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output) {
+		$this->sourceUser = $input->getArgument('source-user');
+		$this->destinationUser = $input->getArgument('destination-user');
+		if (!$this->userManager->userExists($this->sourceUser)) {
+			$output->writeln("<error>Unknown source user $this->sourceUser</error>");
+			return;
+		}
+		if (!$this->userManager->userExists($this->destinationUser)) {
+			$output->writeln("<error>Unknown destination user $this->destinationUser</error>");
+			return;
+		}
+
+		$date = date('c');
+		$this->finalTarget = "$this->destinationUser/files/transferred from $this->sourceUser on $date";
+
+		// setup filesystem
+		Filesystem::initMountPoints($this->sourceUser);
+		Filesystem::initMountPoints($this->destinationUser);
+
+		// analyse source folder
+		$this->analyse($output);
+
+		// collect all the shares
+		$this->collectUsersShares($output);
+
+		// transfer the files
+		$this->transfer($output);
+
+		// restore the shares
+		$this->restoreShares($output);
+	}
+
+	private function walkFiles(View $view, $path, \Closure $callBack) {
+		foreach ($view->getDirectoryContent($path) as $fileInfo) {
+			if (!$callBack($fileInfo)) {
+				return;
+			}
+			if ($fileInfo->getType() === FileInfo::TYPE_FOLDER) {
+				$this->walkFiles($view, $fileInfo->getPath(), $callBack);
+			}
+		}
+	}
+
+	/**
+	 * @param OutputInterface $output
+	 * @throws \Exception
+	 */
+	protected function analyse(OutputInterface $output) {
+		$view = new View();
+		$output->writeln("Analysing files of $this->sourceUser ...");
+		$progress = new ProgressBar($output);
+		$progress->start();
+		$self = $this;
+		$this->walkFiles($view, "$this->sourceUser/files",
+				function (FileInfo $fileInfo) use ($progress, $self) {
+					if ($fileInfo->getType() === FileInfo::TYPE_FOLDER) {
+						return true;
+					}
+					$progress->advance();
+					$this->allFiles[] = $fileInfo;
+					if ($fileInfo->isEncrypted()) {
+						$this->encryptedFiles[] = $fileInfo;
+					}
+					return true;
+				});
+		$progress->finish();
+		$output->writeln('');
+
+		// no file is allowed to be encrypted
+		if (!empty($this->encryptedFiles)) {
+			$output->writeln("<error>Some files are encrypted - please decrypt them first</error>");
+			foreach($this->encryptedFiles as $encryptedFile) {
+				/** @var FileInfo $encryptedFile */
+				$output->writeln("  " . $encryptedFile->getPath());
+			}
+			throw new \Exception('Execution terminated.');
+		}
+
+	}
+
+	/**
+	 * @param OutputInterface $output
+	 */
+	private function collectUsersShares(OutputInterface $output) {
+		$output->writeln("Collecting all share information for files and folder of $this->sourceUser ...");
+
+		$progress = new ProgressBar($output, count($this->shares));
+		foreach([\OCP\Share::SHARE_TYPE_USER, \OCP\Share::SHARE_TYPE_GROUP, \OCP\Share::SHARE_TYPE_LINK, \OCP\Share::SHARE_TYPE_REMOTE] as $shareType) {
+		$offset = 0;
+			while (true) {
+				$sharePage = $this->shareManager->getSharesBy($this->sourceUser, $shareType, null, true, 50, $offset);
+				$progress->advance(count($sharePage));
+				if (empty($sharePage)) {
+					break;
+				}
+				$this->shares = array_merge($this->shares, $sharePage);
+				$offset += 50;
+			}
+		}
+
+		$progress->finish();
+		$output->writeln('');
+	}
+
+	/**
+	 * @param OutputInterface $output
+	 */
+	protected function transfer(OutputInterface $output) {
+		$view = new View();
+		$output->writeln("Transferring files to $this->finalTarget ...");
+		$view->rename("$this->sourceUser/files", $this->finalTarget);
+		// because the files folder is moved away we need to recreate it
+		$view->mkdir("$this->sourceUser/files");
+	}
+
+	/**
+	 * @param OutputInterface $output
+	 */
+	private function restoreShares(OutputInterface $output) {
+		$output->writeln("Restoring shares ...");
+		$progress = new ProgressBar($output, count($this->shares));
+		/** @var Folder $sourceRoot */
+
+		foreach($this->shares as $share) {
+			if ($share->getSharedWith() === $this->destinationUser) {
+				$this->shareManager->deleteShare($share);
+			} else {
+				if ($share->getShareOwner() === $this->sourceUser) {
+					$share->setShareOwner($this->destinationUser);
+				}
+				if ($share->getSharedBy() === $this->sourceUser) {
+					$share->setSharedBy($this->destinationUser);
+				}
+
+				$this->shareManager->updateShare($share);
+			}
+			$progress->advance();
+		}
+		$progress->finish();
+		$output->writeln('');
+	}
+}