1 files changed, 244 insertions, 0 deletions
diff --git a/apps/files_sharing/lib/ShareBackend/File.php b/apps/files_sharing/lib/ShareBackend/File.php
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+++ b/apps/files_sharing/lib/ShareBackend/File.php
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+<?php
+/**
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ *
+ * @author Andreas Fischer <bantu@owncloud.com>
+ * @author Bart Visscher <bartv@thisnet.nl>
+ * @author Bjoern Schiessle <bjoern@schiessle.org>
+ * @author Björn Schießle <bjoern@schiessle.org>
+ * @author Joas Schilling <coding@schilljs.com>
+ * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Michael Gapczynski <GapczynskiM@gmail.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <robin@icewind.nl>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Vincent Petry <pvince81@owncloud.com>
+ *
+ * @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_Sharing\ShareBackend;
+
+use OCA\FederatedFileSharing\FederatedShareProvider;
+
+class File implements \OCP\Share_Backend_File_Dependent {
+
+	const FORMAT_SHARED_STORAGE = 0;
+	const FORMAT_GET_FOLDER_CONTENTS = 1;
+	const FORMAT_FILE_APP_ROOT = 2;
+	const FORMAT_OPENDIR = 3;
+	const FORMAT_GET_ALL = 4;
+	const FORMAT_PERMISSIONS = 5;
+	const FORMAT_TARGET_NAMES = 6;
+
+	private $path;
+
+	/** @var FederatedShareProvider */
+	private $federatedShareProvider;
+
+	public function __construct(FederatedShareProvider $federatedShareProvider = null) {
+		if ($federatedShareProvider) {
+			$this->federatedShareProvider = $federatedShareProvider;
+		} else {
+			$federatedSharingApp = new \OCA\FederatedFileSharing\AppInfo\Application();
+			$this->federatedShareProvider = $federatedSharingApp->getFederatedShareProvider();
+		}
+	}
+
+	public function isValidSource($itemSource, $uidOwner) {
+		try {
+			$path = \OC\Files\Filesystem::getPath($itemSource);
+			// FIXME: attributes should not be set here,
+			// keeping this pattern for now to avoid unexpected
+			// regressions
+			$this->path = \OC\Files\Filesystem::normalizePath(basename($path));
+			return true;
+		} catch (\OCP\Files\NotFoundException $e) {
+			return false;
+		}
+	}
+
+	public function getFilePath($itemSource, $uidOwner) {
+		if (isset($this->path)) {
+			$path = $this->path;
+			$this->path = null;
+			return $path;
+		} else {
+			try {
+				$path = \OC\Files\Filesystem::getPath($itemSource);
+				return $path;
+			} catch (\OCP\Files\NotFoundException $e) {
+				return false;
+			}
+		}
+	}
+
+	/**
+	 * create unique target
+	 * @param string $filePath
+	 * @param string $shareWith
+	 * @param array $exclude (optional)
+	 * @return string
+	 */
+	public function generateTarget($filePath, $shareWith, $exclude = null) {
+		$shareFolder = \OCA\Files_Sharing\Helper::getShareFolder();
+		$target = \OC\Files\Filesystem::normalizePath($shareFolder . '/' . basename($filePath));
+
+		// for group shares we return the target right away
+		if ($shareWith === false) {
+			return $target;
+		}
+
+		\OC\Files\Filesystem::initMountPoints($shareWith);
+		$view = new \OC\Files\View('/' . $shareWith . '/files');
+
+		if (!$view->is_dir($shareFolder)) {
+			$dir = '';
+			$subdirs = explode('/', $shareFolder);
+			foreach ($subdirs as $subdir) {
+				$dir = $dir . '/' . $subdir;
+				if (!$view->is_dir($dir)) {
+					$view->mkdir($dir);
+				}
+			}
+		}
+
+		$excludeList = (is_array($exclude)) ? $exclude : array();
+
+		return \OCA\Files_Sharing\Helper::generateUniqueTarget($target, $excludeList, $view);
+	}
+
+	public function formatItems($items, $format, $parameters = null) {
+		if ($format == self::FORMAT_SHARED_STORAGE) {
+			// Only 1 item should come through for this format call
+			$item = array_shift($items);
+			return array(
+				'parent' => $item['parent'],
+				'path' => $item['path'],
+				'storage' => $item['storage'],
+				'permissions' => $item['permissions'],
+				'uid_owner' => $item['uid_owner'],
+			);
+		} else if ($format == self::FORMAT_GET_FOLDER_CONTENTS) {
+			$files = array();
+			foreach ($items as $item) {
+				$file = array();
+				$file['fileid'] = $item['file_source'];
+				$file['storage'] = $item['storage'];
+				$file['path'] = $item['file_target'];
+				$file['parent'] = $item['file_parent'];
+				$file['name'] = basename($item['file_target']);
+				$file['mimetype'] = $item['mimetype'];
+				$file['mimepart'] = $item['mimepart'];
+				$file['mtime'] = $item['mtime'];
+				$file['encrypted'] = $item['encrypted'];
+				$file['etag'] = $item['etag'];
+				$file['uid_owner'] = $item['uid_owner'];
+				$file['displayname_owner'] = $item['displayname_owner'];
+
+				$storage = \OC\Files\Filesystem::getStorage('/');
+				$cache = $storage->getCache();
+				$file['size'] = $item['size'];
+				$files[] = $file;
+			}
+			return $files;
+		} else if ($format == self::FORMAT_OPENDIR) {
+			$files = array();
+			foreach ($items as $item) {
+				$files[] = basename($item['file_target']);
+			}
+			return $files;
+		} else if ($format == self::FORMAT_GET_ALL) {
+			$ids = array();
+			foreach ($items as $item) {
+				$ids[] = $item['file_source'];
+			}
+			return $ids;
+		} else if ($format === self::FORMAT_PERMISSIONS) {
+			$filePermissions = array();
+			foreach ($items as $item) {
+				$filePermissions[$item['file_source']] = $item['permissions'];
+			}
+			return $filePermissions;
+		} else if ($format === self::FORMAT_TARGET_NAMES) {
+			$targets = array();
+			foreach ($items as $item) {
+				$targets[] = $item['file_target'];
+			}
+			return $targets;
+		}
+		return array();
+	}
+
+	/**
+	 * check if server2server share is enabled
+	 *
+	 * @param int $shareType
+	 * @return boolean
+	 */
+	public function isShareTypeAllowed($shareType) {
+		if ($shareType === \OCP\Share::SHARE_TYPE_REMOTE) {
+			return $this->federatedShareProvider->isOutgoingServer2serverShareEnabled();
+		}
+
+		return true;
+	}
+
+	/**
+	 * resolve reshares to return the correct source item
+	 * @param array $source
+	 * @return array source item
+	 */
+	protected static function resolveReshares($source) {
+		if (isset($source['parent'])) {
+			$parent = $source['parent'];
+			while (isset($parent)) {
+				$query = \OCP\DB::prepare('SELECT `parent`, `uid_owner` FROM `*PREFIX*share` WHERE `id` = ?', 1);
+				$item = $query->execute(array($parent))->fetchRow();
+				if (isset($item['parent'])) {
+					$parent = $item['parent'];
+				} else {
+					$fileOwner = $item['uid_owner'];
+					break;
+				}
+			}
+		} else {
+			$fileOwner = $source['uid_owner'];
+		}
+		if (isset($fileOwner)) {
+			$source['fileOwner'] = $fileOwner;
+		} else {
+			\OCP\Util::writeLog('files_sharing', "No owner found for reshare", \OCP\Util::ERROR);
+		}
+
+		return $source;
+	}
+
+	/**
+	 * @param string $target
+	 * @param array $share
+	 * @return array|false source item
+	 */
+	public static function getSource($target, $share) {
+		if ($share['item_type'] === 'folder' && $target !== '') {
+			// note: in case of ext storage mount points the path might be empty
+			// which would cause a leading slash to appear
+			$share['path'] = ltrim($share['path'] . '/' . $target, '/');
+		}
+		return self::resolveReshares($share);
+	}
+}