Move classes from outside lib/ to PSR-4

1 files changed, 768 insertions, 0 deletions

diff --git a/apps/files_sharing/lib/API/Share20OCS.php b/apps/files_sharing/lib/API/Share20OCS.php
new file mode 100644
index 00000000000..28166b943b8
--- /dev/null
+++ b/apps/files_sharing/lib/API/Share20OCS.php
@@ -0,0 +1,768 @@
+<?php
+/**
+ * @author Roeland Jago Douma <rullzer@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, 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_Sharing\API;
+
+use OCP\Files\NotFoundException;
+use OCP\IGroupManager;
+use OCP\IL10N;
+use OCP\IUserManager;
+use OCP\IRequest;
+use OCP\IURLGenerator;
+use OCP\IUser;
+use OCP\Files\IRootFolder;
+use OCP\Lock\LockedException;
+use OCP\Share;
+use OCP\Share\IManager;
+use OCP\Share\Exceptions\ShareNotFound;
+use OCP\Share\Exceptions\GenericShareException;
+use OCP\Lock\ILockingProvider;
+
+/**
+ * Class Share20OCS
+ *
+ * @package OCA\Files_Sharing\API
+ */
+class Share20OCS {
+
+	/** @var IManager */
+	private $shareManager;
+	/** @var IGroupManager */
+	private $groupManager;
+	/** @var IUserManager */
+	private $userManager;
+	/** @var IRequest */
+	private $request;
+	/** @var IRootFolder */
+	private $rootFolder;
+	/** @var IURLGenerator */
+	private $urlGenerator;
+	/** @var IUser */
+	private $currentUser;
+	/** @var IL10N */
+	private $l;
+
+	/**
+	 * Share20OCS constructor.
+	 *
+	 * @param IManager $shareManager
+	 * @param IGroupManager $groupManager
+	 * @param IUserManager $userManager
+	 * @param IRequest $request
+	 * @param IRootFolder $rootFolder
+	 * @param IURLGenerator $urlGenerator
+	 * @param IUser $currentUser
+	 */
+	public function __construct(
+			IManager $shareManager,
+			IGroupManager $groupManager,
+			IUserManager $userManager,
+			IRequest $request,
+			IRootFolder $rootFolder,
+			IURLGenerator $urlGenerator,
+			IUser $currentUser,
+			IL10N $l10n
+	) {
+		$this->shareManager = $shareManager;
+		$this->userManager = $userManager;
+		$this->groupManager = $groupManager;
+		$this->request = $request;
+		$this->rootFolder = $rootFolder;
+		$this->urlGenerator = $urlGenerator;
+		$this->currentUser = $currentUser;
+		$this->l = $l10n;
+	}
+
+	/**
+	 * Convert an IShare to an array for OCS output
+	 *
+	 * @param \OCP\Share\IShare $share
+	 * @return array
+	 * @throws NotFoundException In case the node can't be resolved.
+	 */
+	protected function formatShare(\OCP\Share\IShare $share) {
+		$sharedBy = $this->userManager->get($share->getSharedBy());
+		// for federated shares the owner can be a remote user, in this
+		// case we use the initiator
+		if ($this->userManager->userExists($share->getShareOwner())) {
+			$shareOwner = $this->userManager->get($share->getShareOwner());
+			$localUser = $share->getShareOwner();
+		} else {
+			$shareOwner = $this->userManager->get($share->getSharedBy());
+			$localUser = $share->getSharedBy();
+		}
+		$result = [
+			'id' => $share->getId(),
+			'share_type' => $share->getShareType(),
+			'uid_owner' => $share->getSharedBy(),
+			'displayname_owner' => $sharedBy !== null ? $sharedBy->getDisplayName() : $share->getSharedBy(),
+			'permissions' => $share->getPermissions(),
+			'stime' => $share->getShareTime()->getTimestamp(),
+			'parent' => null,
+			'expiration' => null,
+			'token' => null,
+			'uid_file_owner' => $share->getShareOwner(),
+			'displayname_file_owner' => $shareOwner !== null ? $shareOwner->getDisplayName() : $share->getShareOwner(),
+		];
+
+		$node = $share->getNode();
+		$result['path'] = $this->rootFolder->getUserFolder($localUser)->getRelativePath($node->getPath());
+		if ($node instanceOf \OCP\Files\Folder) {
+			$result['item_type'] = 'folder';
+		} else {
+			$result['item_type'] = 'file';
+		}
+		$result['mimetype'] = $node->getMimeType();
+		$result['storage_id'] = $node->getStorage()->getId();
+		$result['storage'] = $node->getStorage()->getCache()->getNumericStorageId();
+		$result['item_source'] = $node->getId();
+		$result['file_source'] = $node->getId();
+		$result['file_parent'] = $node->getParent()->getId();
+		$result['file_target'] = $share->getTarget();
+
+		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER) {
+			$sharedWith = $this->userManager->get($share->getSharedWith());
+			$result['share_with'] = $share->getSharedWith();
+			$result['share_with_displayname'] = $sharedWith !== null ? $sharedWith->getDisplayName() : $share->getSharedWith();
+		} else if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
+			$result['share_with'] = $share->getSharedWith();
+			$result['share_with_displayname'] = $share->getSharedWith();
+		} else if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
+
+			$result['share_with'] = $share->getPassword();
+			$result['share_with_displayname'] = $share->getPassword();
+
+			$result['token'] = $share->getToken();
+			$result['url'] = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.showShare', ['token' => $share->getToken()]);
+
+			$expiration = $share->getExpirationDate();
+			if ($expiration !== null) {
+				$result['expiration'] = $expiration->format('Y-m-d 00:00:00');
+			}
+
+		} else if ($share->getShareType() === \OCP\Share::SHARE_TYPE_REMOTE) {
+			$result['share_with'] = $share->getSharedWith();
+			$result['share_with_displayname'] = $share->getSharedWith();
+			$result['token'] = $share->getToken();
+		}
+
+		$result['mail_send'] = $share->getMailSend() ? 1 : 0;
+
+		return $result;
+	}
+
+	/**
+	 * Get a specific share by id
+	 *
+	 * @param string $id
+	 * @return \OC_OCS_Result
+	 */
+	public function getShare($id) {
+		if (!$this->shareManager->shareApiEnabled()) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Share API is disabled'));
+		}
+
+		try {
+			$share = $this->getShareById($id);
+		} catch (ShareNotFound $e) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Wrong share ID, share doesn\'t exist'));
+		}
+
+		if ($this->canAccessShare($share)) {
+			try {
+				$share = $this->formatShare($share);
+				return new \OC_OCS_Result([$share]);
+			} catch (NotFoundException $e) {
+				//Fall trough
+			}
+		}
+
+		return new \OC_OCS_Result(null, 404, $this->l->t('Wrong share ID, share doesn\'t exist'));
+	}
+
+	/**
+	 * Delete a share
+	 *
+	 * @param string $id
+	 * @return \OC_OCS_Result
+	 */
+	public function deleteShare($id) {
+		if (!$this->shareManager->shareApiEnabled()) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Share API is disabled'));
+		}
+
+		try {
+			$share = $this->getShareById($id);
+		} catch (ShareNotFound $e) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Wrong share ID, share doesn\'t exist'));
+		}
+
+		try {
+			$share->getNode()->lock(ILockingProvider::LOCK_SHARED);
+		} catch (LockedException $e) {
+			return new \OC_OCS_Result(null, 404, 'could not delete share');
+		}
+
+		if (!$this->canAccessShare($share)) {
+			$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+			return new \OC_OCS_Result(null, 404, $this->l->t('Could not delete share'));
+		}
+
+		$this->shareManager->deleteShare($share);
+
+		$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+
+		return new \OC_OCS_Result();
+	}
+
+	/**
+	 * @return \OC_OCS_Result
+	 */
+	public function createShare() {
+		$share = $this->shareManager->newShare();
+
+		if (!$this->shareManager->shareApiEnabled()) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Share API is disabled'));
+		}
+
+		// Verify path
+		$path = $this->request->getParam('path', null);
+		if ($path === null) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Please specify a file or folder path'));
+		}
+
+		$userFolder = $this->rootFolder->getUserFolder($this->currentUser->getUID());
+		try {
+			$path = $userFolder->get($path);
+		} catch (NotFoundException $e) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Wrong path, file/folder doesn\'t exist'));
+		}
+
+		$share->setNode($path);
+
+		try {
+			$share->getNode()->lock(ILockingProvider::LOCK_SHARED);
+		} catch (LockedException $e) {
+			return new \OC_OCS_Result(null, 404, 'Could not create share');
+		}
+
+		// Parse permissions (if available)
+		$permissions = $this->request->getParam('permissions', null);
+		if ($permissions === null) {
+			$permissions = \OCP\Constants::PERMISSION_ALL;
+		} else {
+			$permissions = (int)$permissions;
+		}
+
+		if ($permissions < 0 || $permissions > \OCP\Constants::PERMISSION_ALL) {
+			$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+			return new \OC_OCS_Result(null, 404, 'invalid permissions');
+		}
+
+		// Shares always require read permissions
+		$permissions |= \OCP\Constants::PERMISSION_READ;
+
+		if ($path instanceof \OCP\Files\File) {
+			// Single file shares should never have delete or create permissions
+			$permissions &= ~\OCP\Constants::PERMISSION_DELETE;
+			$permissions &= ~\OCP\Constants::PERMISSION_CREATE;
+		}
+
+		/*
+		 * Hack for https://github.com/owncloud/core/issues/22587
+		 * We check the permissions via webdav. But the permissions of the mount point
+		 * do not equal the share permissions. Here we fix that for federated mounts.
+		 */
+		if ($path->getStorage()->instanceOfStorage('OCA\Files_Sharing\External\Storage')) {
+			$permissions &= ~($permissions & ~$path->getPermissions());
+		}
+
+		$shareWith = $this->request->getParam('shareWith', null);
+		$shareType = (int)$this->request->getParam('shareType', '-1');
+
+		if ($shareType === \OCP\Share::SHARE_TYPE_USER) {
+			// Valid user is required to share
+			if ($shareWith === null || !$this->userManager->userExists($shareWith)) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 404, $this->l->t('Please specify a valid user'));
+			}
+			$share->setSharedWith($shareWith);
+			$share->setPermissions($permissions);
+		} else if ($shareType === \OCP\Share::SHARE_TYPE_GROUP) {
+			if (!$this->shareManager->allowGroupSharing()) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 404, $this->l->t('Group sharing is disabled by the administrator'));
+			}
+
+			// Valid group is required to share
+			if ($shareWith === null || !$this->groupManager->groupExists($shareWith)) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 404, $this->l->t('Please specify a valid group'));
+			}
+			$share->setSharedWith($shareWith);
+			$share->setPermissions($permissions);
+		} else if ($shareType === \OCP\Share::SHARE_TYPE_LINK) {
+			//Can we even share links?
+			if (!$this->shareManager->shareApiAllowLinks()) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 404, $this->l->t('Public link sharing is disabled by the administrator'));
+			}
+
+			/*
+			 * For now we only allow 1 link share.
+			 * Return the existing link share if this is a duplicate
+			 */
+			$existingShares = $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_LINK, $path, false, 1, 0);
+			if (!empty($existingShares)) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result($this->formatShare($existingShares[0]));
+			}
+
+			$publicUpload = $this->request->getParam('publicUpload', null);
+			if ($publicUpload === 'true') {
+				// Check if public upload is allowed
+				if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
+					$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+					return new \OC_OCS_Result(null, 403, $this->l->t('Public upload disabled by the administrator'));
+				}
+
+				// Public upload can only be set for folders
+				if ($path instanceof \OCP\Files\File) {
+					$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+					return new \OC_OCS_Result(null, 404, $this->l->t('Public upload is only possible for publicly shared folders'));
+				}
+
+				$share->setPermissions(
+					\OCP\Constants::PERMISSION_READ |
+					\OCP\Constants::PERMISSION_CREATE |
+					\OCP\Constants::PERMISSION_UPDATE
+				);
+			} else {
+				$share->setPermissions(\OCP\Constants::PERMISSION_READ);
+			}
+
+			// Set password
+			$password = $this->request->getParam('password', '');
+
+			if ($password !== '') {
+				$share->setPassword($password);
+			}
+
+			//Expire date
+			$expireDate = $this->request->getParam('expireDate', '');
+
+			if ($expireDate !== '') {
+				try {
+					$expireDate = $this->parseDate($expireDate);
+					$share->setExpirationDate($expireDate);
+				} catch (\Exception $e) {
+					$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+					return new \OC_OCS_Result(null, 404, $this->l->t('Invalid date, date format must be YYYY-MM-DD'));
+				}
+			}
+
+		} else if ($shareType === \OCP\Share::SHARE_TYPE_REMOTE) {
+			if (!$this->shareManager->outgoingServer2ServerSharesAllowed()) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 403, $this->l->t('Sharing %s failed because the back end does not allow shares from type %s', [$path->getPath(), $shareType]));
+			}
+
+			$share->setSharedWith($shareWith);
+			$share->setPermissions($permissions);
+		} else {
+			$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+			return new \OC_OCS_Result(null, 400, $this->l->t('Unknown share type'));
+		}
+
+		$share->setShareType($shareType);
+		$share->setSharedBy($this->currentUser->getUID());
+
+		try {
+			$share = $this->shareManager->createShare($share);
+		} catch (GenericShareException $e) {
+			$code = $e->getCode() === 0 ? 403 : $e->getCode();
+			$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+			return new \OC_OCS_Result(null, $code, $e->getHint());
+		}catch (\Exception $e) {
+			$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+			return new \OC_OCS_Result(null, 403, $e->getMessage());
+		}
+
+		$output = $this->formatShare($share);
+
+		$share->getNode()->unlock(\OCP\Lock\ILockingProvider::LOCK_SHARED);
+
+		return new \OC_OCS_Result($output);
+	}
+
+	/**
+	 * @param \OCP\Files\File|\OCP\Files\Folder $node
+	 * @return \OC_OCS_Result
+	 */
+	private function getSharedWithMe($node = null) {
+		$userShares = $this->shareManager->getSharedWith($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_USER, $node, -1, 0);
+		$groupShares = $this->shareManager->getSharedWith($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_GROUP, $node, -1, 0);
+
+		$shares = array_merge($userShares, $groupShares);
+
+		$formatted = [];
+		foreach ($shares as $share) {
+			if ($this->canAccessShare($share)) {
+				try {
+					$formatted[] = $this->formatShare($share);
+				} catch (NotFoundException $e) {
+					// Ignore this share
+				}
+			}
+		}
+
+		return new \OC_OCS_Result($formatted);
+	}
+
+	/**
+	 * @param \OCP\Files\Folder $folder
+	 * @return \OC_OCS_Result
+	 */
+	private function getSharesInDir($folder) {
+		if (!($folder instanceof \OCP\Files\Folder)) {
+			return new \OC_OCS_Result(null, 400, $this->l->t('Not a directory'));
+		}
+
+		$nodes = $folder->getDirectoryListing();
+		/** @var \OCP\Share\IShare[] $shares */
+		$shares = [];
+		foreach ($nodes as $node) {
+			$shares = array_merge($shares, $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_USER, $node, false, -1, 0));
+			$shares = array_merge($shares, $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_GROUP, $node, false, -1, 0));
+			$shares = array_merge($shares, $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_LINK, $node, false, -1, 0));
+			if ($this->shareManager->outgoingServer2ServerSharesAllowed()) {
+				$shares = array_merge($shares, $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_REMOTE, $node, false, -1, 0));
+			}
+		}
+
+		$formatted = [];
+		foreach ($shares as $share) {
+			try {
+				$formatted[] = $this->formatShare($share);
+			} catch (NotFoundException $e) {
+				//Ignore this share
+			}
+		}
+
+		return new \OC_OCS_Result($formatted);
+	}
+
+	/**
+	 * The getShares function.
+	 *
+	 * - Get shares by the current user
+	 * - Get shares by the current user and reshares (?reshares=true)
+	 * - Get shares with the current user (?shared_with_me=true)
+	 * - Get shares for a specific path (?path=...)
+	 * - Get all shares in a folder (?subfiles=true&path=..)
+	 *
+	 * @return \OC_OCS_Result
+	 */
+	public function getShares() {
+		if (!$this->shareManager->shareApiEnabled()) {
+			return new \OC_OCS_Result();
+		}
+
+		$sharedWithMe = $this->request->getParam('shared_with_me', null);
+		$reshares = $this->request->getParam('reshares', null);
+		$subfiles = $this->request->getParam('subfiles');
+		$path = $this->request->getParam('path', null);
+
+		if ($path !== null) {
+			$userFolder = $this->rootFolder->getUserFolder($this->currentUser->getUID());
+			try {
+				$path = $userFolder->get($path);
+				$path->lock(ILockingProvider::LOCK_SHARED);
+			} catch (\OCP\Files\NotFoundException $e) {
+				return new \OC_OCS_Result(null, 404, $this->l->t('Wrong path, file/folder doesn\'t exist'));
+			} catch (LockedException $e) {
+				return new \OC_OCS_Result(null, 404, $this->l->t('Could not lock path'));
+			}
+		}
+
+		if ($sharedWithMe === 'true') {
+			$result = $this->getSharedWithMe($path);
+			if ($path !== null) {
+				$path->unlock(ILockingProvider::LOCK_SHARED);
+			}
+			return $result;
+		}
+
+		if ($subfiles === 'true') {
+			$result = $this->getSharesInDir($path);
+			if ($path !== null) {
+				$path->unlock(ILockingProvider::LOCK_SHARED);
+			}
+			return $result;
+		}
+
+		if ($reshares === 'true') {
+			$reshares = true;
+		} else {
+			$reshares = false;
+		}
+
+		// Get all shares
+		$userShares = $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_USER, $path, $reshares, -1, 0);
+		$groupShares = $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_GROUP, $path, $reshares, -1, 0);
+		$linkShares = $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_LINK, $path, $reshares, -1, 0);
+		$shares = array_merge($userShares, $groupShares, $linkShares);
+
+		if ($this->shareManager->outgoingServer2ServerSharesAllowed()) {
+			$federatedShares = $this->shareManager->getSharesBy($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_REMOTE, $path, $reshares, -1, 0);
+			$shares = array_merge($shares, $federatedShares);
+		}
+
+
+		$formatted = [];
+		foreach ($shares as $share) {
+			try {
+				$formatted[] = $this->formatShare($share);
+			} catch (NotFoundException $e) {
+				//Ignore share
+			}
+		}
+
+		if ($path !== null) {
+			$path->unlock(ILockingProvider::LOCK_SHARED);
+		}
+
+		return new \OC_OCS_Result($formatted);
+	}
+
+	/**
+	 * @param int $id
+	 * @return \OC_OCS_Result
+	 */
+	public function updateShare($id) {
+		if (!$this->shareManager->shareApiEnabled()) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Share API is disabled'));
+		}
+
+		try {
+			$share = $this->getShareById($id);
+		} catch (ShareNotFound $e) {
+			return new \OC_OCS_Result(null, 404, $this->l->t('Wrong share ID, share doesn\'t exist'));
+		}
+
+		$share->getNode()->lock(\OCP\Lock\ILockingProvider::LOCK_SHARED);
+
+		if (!$this->canAccessShare($share)) {
+			$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+			return new \OC_OCS_Result(null, 404, $this->l->t('Wrong share ID, share doesn\'t exist'));
+		}
+
+		$permissions = $this->request->getParam('permissions', null);
+		$password = $this->request->getParam('password', null);
+		$publicUpload = $this->request->getParam('publicUpload', null);
+		$expireDate = $this->request->getParam('expireDate', null);
+
+		/*
+		 * expirationdate, password and publicUpload only make sense for link shares
+		 */
+		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
+			if ($permissions === null && $password === null && $publicUpload === null && $expireDate === null) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 400, 'Wrong or no update parameter given');
+			}
+
+			$newPermissions = null;
+			if ($publicUpload === 'true') {
+				$newPermissions = \OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE;
+			} else if ($publicUpload === 'false') {
+				$newPermissions = \OCP\Constants::PERMISSION_READ;
+			}
+
+			if ($permissions !== null) {
+				$newPermissions = (int)$permissions;
+			}
+
+			if ($newPermissions !== null &&
+				$newPermissions !== \OCP\Constants::PERMISSION_READ &&
+				$newPermissions !== (\OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE)) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 400, $this->l->t('Can\'t change permissions for public share links'));
+			}
+
+			if ($newPermissions === (\OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE)) {
+				if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
+					$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+					return new \OC_OCS_Result(null, 403, $this->l->t('Public upload disabled by the administrator'));
+				}
+
+				if (!($share->getNode() instanceof \OCP\Files\Folder)) {
+					$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+					return new \OC_OCS_Result(null, 400, $this->l->t('Public upload is only possible for publicly shared folders'));
+				}
+			}
+
+			if ($newPermissions !== null) {
+				$share->setPermissions($newPermissions);
+			}
+
+			if ($expireDate === '') {
+				$share->setExpirationDate(null);
+			} else if ($expireDate !== null) {
+				try {
+					$expireDate = $this->parseDate($expireDate);
+				} catch (\Exception $e) {
+					$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+					return new \OC_OCS_Result(null, 400, $e->getMessage());
+				}
+				$share->setExpirationDate($expireDate);
+			}
+
+			if ($password === '') {
+				$share->setPassword(null);
+			} else if ($password !== null) {
+				$share->setPassword($password);
+			}
+
+		} else {
+			// For other shares only permissions is valid.
+			if ($permissions === null) {
+				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+				return new \OC_OCS_Result(null, 400, $this->l->t('Wrong or no update parameter given'));
+			} else {
+				$permissions = (int)$permissions;
+				$share->setPermissions($permissions);
+			}
+		}
+
+		if ($permissions !== null) {
+			/* Check if this is an incomming share */
+			$incomingShares = $this->shareManager->getSharedWith($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_USER, $share->getNode(), -1, 0);
+			$incomingShares = array_merge($incomingShares, $this->shareManager->getSharedWith($this->currentUser->getUID(), \OCP\Share::SHARE_TYPE_GROUP, $share->getNode(), -1, 0));
+
+			if (!empty($incomingShares)) {
+				$maxPermissions = 0;
+				foreach ($incomingShares as $incomingShare) {
+					$maxPermissions |= $incomingShare->getPermissions();
+				}
+
+				if ($share->getPermissions() & ~$maxPermissions) {
+					$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+					return new \OC_OCS_Result(null, 404, $this->l->t('Cannot increase permissions'));
+				}
+			}
+		}
+
+
+		try {
+			$share = $this->shareManager->updateShare($share);
+		} catch (\Exception $e) {
+			$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
+			return new \OC_OCS_Result(null, 400, $e->getMessage());
+		}
+
+		$share->getNode()->unlock(\OCP\Lock\ILockingProvider::LOCK_SHARED);
+
+		return new \OC_OCS_Result($this->formatShare($share));
+	}
+
+	/**
+	 * @param \OCP\Share\IShare $share
+	 * @return bool
+	 */
+	protected function canAccessShare(\OCP\Share\IShare $share) {
+		// A file with permissions 0 can't be accessed by us. So Don't show it
+		if ($share->getPermissions() === 0) {
+			return false;
+		}
+
+		// Owner of the file and the sharer of the file can always get share
+		if ($share->getShareOwner() === $this->currentUser->getUID() ||
+			$share->getSharedBy() === $this->currentUser->getUID()
+		) {
+			return true;
+		}
+
+		// If the share is shared with you (or a group you are a member of)
+		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER &&
+			$share->getSharedWith() === $this->currentUser->getUID()) {
+			return true;
+		}
+
+		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
+			$sharedWith = $this->groupManager->get($share->getSharedWith());
+			if ($sharedWith->inGroup($this->currentUser)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Make sure that the passed date is valid ISO 8601
+	 * So YYYY-MM-DD
+	 * If not throw an exception
+	 *
+	 * @param string $expireDate
+	 *
+	 * @throws \Exception
+	 * @return \DateTime
+	 */
+	private function parseDate($expireDate) {
+		try {
+			$date = new \DateTime($expireDate);
+		} catch (\Exception $e) {
+			throw new \Exception('Invalid date. Format must be YYYY-MM-DD');
+		}
+
+		if ($date === false) {
+			throw new \Exception('Invalid date. Format must be YYYY-MM-DD');
+		}
+
+		$date->setTime(0,0,0);
+
+		return $date;
+	}
+
+	/**
+	 * Since we have multiple providers but the OCS Share API v1 does
+	 * not support this we need to check all backends.
+	 *
+	 * @param string $id
+	 * @return \OCP\Share\IShare
+	 * @throws ShareNotFound
+	 */
+	private function getShareById($id) {
+		$share = null;
+
+		// First check if it is an internal share.
+		try {
+			$share = $this->shareManager->getShareById('ocinternal:'.$id);
+		} catch (ShareNotFound $e) {
+			if (!$this->shareManager->outgoingServer2ServerSharesAllowed()) {
+				throw new ShareNotFound();
+			}
+
+			$share = $this->shareManager->getShareById('ocFederatedSharing:' . $id);
+		}
+
+		return $share;
+	}
+}