nextcloud / server

apps/files_sharing/lib/Controller/ShareAPIController.php

Indentation +1576 added lines, -1576 removed lines

@@ -76,1584 +76,1584 @@
  */
 class ShareAPIController extends OCSController {
 
-	/** @var IManager */
-	private $shareManager;
-	/** @var IGroupManager */
-	private $groupManager;
-	/** @var IUserManager */
-	private $userManager;
-	/** @var IRootFolder */
-	private $rootFolder;
-	/** @var IURLGenerator */
-	private $urlGenerator;
-	/** @var string */
-	private $currentUser;
-	/** @var IL10N */
-	private $l;
-	/** @var \OCP\Files\Node */
-	private $lockedNode;
-	/** @var IConfig */
-	private $config;
-	/** @var IAppManager */
-	private $appManager;
-	/** @var IServerContainer */
-	private $serverContainer;
-
-	/**
-	 * Share20OCS constructor.
-	 *
-	 * @param string $appName
-	 * @param IRequest $request
-	 * @param IManager $shareManager
-	 * @param IGroupManager $groupManager
-	 * @param IUserManager $userManager
-	 * @param IRootFolder $rootFolder
-	 * @param IURLGenerator $urlGenerator
-	 * @param string $userId
-	 * @param IL10N $l10n
-	 * @param IConfig $config
-	 * @param IAppManager $appManager
-	 * @param IServerContainer $serverContainer
-	 */
-	public function __construct(
-		string $appName,
-		IRequest $request,
-		IManager $shareManager,
-		IGroupManager $groupManager,
-		IUserManager $userManager,
-		IRootFolder $rootFolder,
-		IURLGenerator $urlGenerator,
-		string $userId = null,
-		IL10N $l10n,
-		IConfig $config,
-		IAppManager $appManager,
-		IServerContainer $serverContainer
-	) {
-		parent::__construct($appName, $request);
-
-		$this->shareManager = $shareManager;
-		$this->userManager = $userManager;
-		$this->groupManager = $groupManager;
-		$this->request = $request;
-		$this->rootFolder = $rootFolder;
-		$this->urlGenerator = $urlGenerator;
-		$this->currentUser = $userId;
-		$this->l = $l10n;
-		$this->config = $config;
-		$this->appManager = $appManager;
-		$this->serverContainer = $serverContainer;
-	}
-
-	/**
-	 * Convert an IShare to an array for OCS output
-	 *
-	 * @param \OCP\Share\IShare $share
-	 * @param Node|null $recipientNode
-	 * @return array
-	 * @throws NotFoundException In case the node can't be resolved.
-	 *
-	 * @suppress PhanUndeclaredClassMethod
-	 */
-	protected function formatShare(\OCP\Share\IShare $share, Node $recipientNode = null): array {
-		$sharedBy = $this->userManager->get($share->getSharedBy());
-		$shareOwner = $this->userManager->get($share->getShareOwner());
-
-		$result = [
-			'id' => $share->getId(),
-			'share_type' => $share->getShareType(),
-			'uid_owner' => $share->getSharedBy(),
-			'displayname_owner' => $sharedBy !== null ? $sharedBy->getDisplayName() : $share->getSharedBy(),
-			// recipient permissions
-			'permissions' => $share->getPermissions(),
-			// current user permissions on this share
-			'can_edit' => $this->canEditShare($share),
-			'can_delete' => $this->canDeleteShare($share),
-			'stime' => $share->getShareTime()->getTimestamp(),
-			'parent' => null,
-			'expiration' => null,
-			'token' => null,
-			'uid_file_owner' => $share->getShareOwner(),
-			'note' => $share->getNote(),
-			'label' => $share->getLabel(),
-			'displayname_file_owner' => $shareOwner !== null ? $shareOwner->getDisplayName() : $share->getShareOwner(),
-		];
-
-		$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
-		if ($recipientNode) {
-			$node = $recipientNode;
-		} else {
-			$nodes = $userFolder->getById($share->getNodeId());
-			if (empty($nodes)) {
-				// fallback to guessing the path
-				$node = $userFolder->get($share->getTarget());
-				if ($node === null || $share->getTarget() === '') {
-					throw new NotFoundException();
-				}
-			} else {
-				$node = reset($nodes);
-			}
-		}
-
-		$result['path'] = $userFolder->getRelativePath($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();
-
-		$expiration = $share->getExpirationDate();
-		if ($expiration !== null) {
-			$result['expiration'] = $expiration->format('Y-m-d 00:00:00');
-		}
-
-		if ($share->getShareType() === 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() === Share::SHARE_TYPE_GROUP) {
-			$group = $this->groupManager->get($share->getSharedWith());
-			$result['share_with'] = $share->getSharedWith();
-			$result['share_with_displayname'] = $group !== null ? $group->getDisplayName() : $share->getSharedWith();
-		} else if ($share->getShareType() === IShare::TYPE_LINK) {
-
-			// "share_with" and "share_with_displayname" for passwords of link
-			// shares was deprecated in Nextcloud 15, use "password" instead.
-			$result['share_with'] = $share->getPassword();
-			$result['share_with_displayname'] = '(' . $this->l->t('Shared link') . ')';
-
-			$result['password'] = $share->getPassword();
-
-			$result['send_password_by_talk'] = $share->getSendPasswordByTalk();
-
-			$result['token'] = $share->getToken();
-			$result['url'] = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.showShare', ['token' => $share->getToken()]);
-		} else if ($share->getShareType() === Share::SHARE_TYPE_REMOTE || $share->getShareType() === Share::SHARE_TYPE_REMOTE_GROUP) {
-			$result['share_with'] = $share->getSharedWith();
-			$result['share_with_displayname'] = $this->getDisplayNameFromAddressBook($share->getSharedWith(), 'CLOUD');
-			$result['token'] = $share->getToken();
-		} else if ($share->getShareType() === Share::SHARE_TYPE_EMAIL) {
-			$result['share_with'] = $share->getSharedWith();
-			$result['password'] = $share->getPassword();
-			$result['send_password_by_talk'] = $share->getSendPasswordByTalk();
-			$result['share_with_displayname'] = $this->getDisplayNameFromAddressBook($share->getSharedWith(), 'EMAIL');
-			$result['token'] = $share->getToken();
-		} else if ($share->getShareType() === Share::SHARE_TYPE_CIRCLE) {
-			// getSharedWith() returns either "name (type, owner)" or
-			// "name (type, owner) [id]", depending on the Circles app version.
-			$hasCircleId = (substr($share->getSharedWith(), -1) === ']');
-
-			$result['share_with_displayname'] = $share->getSharedWithDisplayName();
-			if (empty($result['share_with_displayname'])) {
-				$displayNameLength = ($hasCircleId ? strrpos($share->getSharedWith(), ' ') : strlen($share->getSharedWith()));
-				$result['share_with_displayname'] = substr($share->getSharedWith(), 0, $displayNameLength);
-			}
-
-			$result['share_with_avatar'] = $share->getSharedWithAvatar();
-
-			$shareWithStart = ($hasCircleId ? strrpos($share->getSharedWith(), '[') + 1 : 0);
-			$shareWithLength = ($hasCircleId ? -1 : strpos($share->getSharedWith(), ' '));
-			if (is_bool($shareWithLength)) {
-				$shareWithLength = -1;
-			}
-			$result['share_with'] = substr($share->getSharedWith(), $shareWithStart, $shareWithLength);
-		} else if ($share->getShareType() === Share::SHARE_TYPE_ROOM) {
-			$result['share_with'] = $share->getSharedWith();
-			$result['share_with_displayname'] = '';
-
-			try {
-				$result = array_merge($result, $this->getRoomShareHelper()->formatShare($share));
-			} catch (QueryException $e) {}
-		}
-
-
-		$result['mail_send'] = $share->getMailSend() ? 1 : 0;
-		$result['hide_download'] = $share->getHideDownload() ? 1 : 0;
-
-		return $result;
-	}
-
-	/**
-	 * Check if one of the users address books knows the exact property, if
-	 * yes we return the full name.
-	 *
-	 * @param string $query
-	 * @param string $property
-	 * @return string
-	 */
-	private function getDisplayNameFromAddressBook(string $query, string $property): string {
-		// FIXME: If we inject the contacts manager it gets initialized bofore any address books are registered
-		$result = \OC::$server->getContactsManager()->search($query, [$property]);
-		foreach ($result as $r) {
-			foreach ($r[$property] as $value) {
-				if ($value === $query) {
-					return $r['FN'];
-				}
-			}
-		}
-
-		return $query;
-	}
-
-	/**
-	 * Get a specific share by id
-	 *
-	 * @NoAdminRequired
-	 *
-	 * @param string $id
-	 * @return DataResponse
-	 * @throws OCSNotFoundException
-	 */
-	public function getShare(string $id): DataResponse {
-		try {
-			$share = $this->getShareById($id);
-		} catch (ShareNotFound $e) {
-			throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-		}
-
-		try {
-			if ($this->canAccessShare($share)) {
-				$share = $this->formatShare($share);
-				return new DataResponse([$share]);
-			}
-		} catch (NotFoundException $e) {
-			// Fall trough
-		}
-
-		throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-	}
-
-	/**
-	 * Delete a share
-	 *
-	 * @NoAdminRequired
-	 *
-	 * @param string $id
-	 * @return DataResponse
-	 * @throws OCSNotFoundException
-	 */
-	public function deleteShare(string $id): DataResponse {
-		try {
-			$share = $this->getShareById($id);
-		} catch (ShareNotFound $e) {
-			throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-		}
-
-		try {
-			$this->lock($share->getNode());
-		} catch (LockedException $e) {
-			throw new OCSNotFoundException($this->l->t('Could not delete share'));
-		}
-
-		if (!$this->canAccessShare($share)) {
-			throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-		}
-
-		// if it's a group share or a room share
-		// we don't delete the share, but only the
-		// mount point. Allowing it to be restored
-		// from the deleted shares
-		if ($this->canDeleteShareFromSelf($share)) {
-			$this->shareManager->deleteFromSelf($share, $this->currentUser);
-		} else {
-			if (!$this->canDeleteShare($share)) {
-				throw new OCSForbiddenException($this->l->t('Could not delete share'));
-			}
-
-			$this->shareManager->deleteShare($share);
-		}
-
-		return new DataResponse();
-	}
-
-	/**
-	 * @NoAdminRequired
-	 *
-	 * @param string $path
-	 * @param int $permissions
-	 * @param int $shareType
-	 * @param string $shareWith
-	 * @param string $publicUpload
-	 * @param string $password
-	 * @param string $sendPasswordByTalk
-	 * @param string $expireDate
-	 * @param string $label
-	 *
-	 * @return DataResponse
-	 * @throws NotFoundException
-	 * @throws OCSBadRequestException
-	 * @throws OCSException
-	 * @throws OCSForbiddenException
-	 * @throws OCSNotFoundException
-	 * @throws InvalidPathException
-	 * @suppress PhanUndeclaredClassMethod
-	 */
-	public function createShare(
-		string $path = null,
-		int $permissions = null,
-		int $shareType = -1,
-		string $shareWith = null,
-		string $publicUpload = 'false',
-		string $password = '',
-		string $sendPasswordByTalk = null,
-		string $expireDate = '',
-		string $label = ''
-	): DataResponse {
-		$share = $this->shareManager->newShare();
-
-		if ($permissions === null) {
-			$permissions = $this->config->getAppValue('core', 'shareapi_default_permissions', Constants::PERMISSION_ALL);
-		}
-
-		// Verify path
-		if ($path === null) {
-			throw new OCSNotFoundException($this->l->t('Please specify a file or folder path'));
-		}
-
-		$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
-		try {
-			$path = $userFolder->get($path);
-		} catch (NotFoundException $e) {
-			throw new OCSNotFoundException($this->l->t('Wrong path, file/folder doesn\'t exist'));
-		}
-
-		$share->setNode($path);
-
-		try {
-			$this->lock($share->getNode());
-		} catch (LockedException $e) {
-			throw new OCSNotFoundException($this->l->t('Could not create share'));
-		}
-
-		if ($permissions < 0 || $permissions > Constants::PERMISSION_ALL) {
-			throw new OCSNotFoundException($this->l->t('invalid permissions'));
-		}
-
-		// Shares always require read permissions
-		$permissions |= Constants::PERMISSION_READ;
-
-		if ($path instanceof \OCP\Files\File) {
-			// Single file shares should never have delete or create permissions
-			$permissions &= ~Constants::PERMISSION_DELETE;
-			$permissions &= ~Constants::PERMISSION_CREATE;
-		}
-
-		/**
-		 * Hack for https://github.com/owncloud/core/issues/22587
-		 * We check the permissions via webdav. But the permissions of the mount point
-		 * do not equal the share permissions. Here we fix that for federated mounts.
-		 */
-		if ($path->getStorage()->instanceOfStorage(Storage::class)) {
-			$permissions &= ~($permissions & ~$path->getPermissions());
-		}
-
-		if ($shareType === Share::SHARE_TYPE_USER) {
-			// Valid user is required to share
-			if ($shareWith === null || !$this->userManager->userExists($shareWith)) {
-				throw new OCSNotFoundException($this->l->t('Please specify a valid user'));
-			}
-			$share->setSharedWith($shareWith);
-			$share->setPermissions($permissions);
-		} else if ($shareType === Share::SHARE_TYPE_GROUP) {
-			if (!$this->shareManager->allowGroupSharing()) {
-				throw new OCSNotFoundException($this->l->t('Group sharing is disabled by the administrator'));
-			}
-
-			// Valid group is required to share
-			if ($shareWith === null || !$this->groupManager->groupExists($shareWith)) {
-				throw new OCSNotFoundException($this->l->t('Please specify a valid group'));
-			}
-			$share->setSharedWith($shareWith);
-			$share->setPermissions($permissions);
-		} else if ($shareType === Share::SHARE_TYPE_LINK
-			|| $shareType === Share::SHARE_TYPE_EMAIL) {
-
-			// Can we even share links?
-			if (!$this->shareManager->shareApiAllowLinks()) {
-				throw new OCSNotFoundException($this->l->t('Public link sharing is disabled by the administrator'));
-			}
-
-			if ($publicUpload === 'true') {
-				// Check if public upload is allowed
-				if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
-					throw new OCSForbiddenException($this->l->t('Public upload disabled by the administrator'));
-				}
-
-				// Public upload can only be set for folders
-				if ($path instanceof \OCP\Files\File) {
-					throw new OCSNotFoundException($this->l->t('Public upload is only possible for publicly shared folders'));
-				}
-
-				$share->setPermissions(
-					Constants::PERMISSION_READ |
-					Constants::PERMISSION_CREATE |
-					Constants::PERMISSION_UPDATE |
-					Constants::PERMISSION_DELETE
-				);
-			} else {
-				$share->setPermissions(Constants::PERMISSION_READ);
-			}
-
-			// Set password
-			if ($password !== '') {
-				$share->setPassword($password);
-			}
-
-			// Only share by mail have a recipient
-			if ($shareType === Share::SHARE_TYPE_EMAIL) {
-				$share->setSharedWith($shareWith);
-			} else {
-				// Only link share have a label
-				if (!empty($label)) {
-					$share->setLabel($label);
-				}
-			}
-
-			if ($sendPasswordByTalk === 'true') {
-				if (!$this->appManager->isEnabledForUser('spreed')) {
-					throw new OCSForbiddenException($this->l->t('Sharing %s sending the password by Nextcloud Talk failed because Nextcloud Talk is not enabled', [$path->getPath()]));
-				}
-
-				$share->setSendPasswordByTalk(true);
-			}
-
-			//Expire date
-			if ($expireDate !== '') {
-				try {
-					$expireDate = $this->parseDate($expireDate);
-					$share->setExpirationDate($expireDate);
-				} catch (\Exception $e) {
-					throw new OCSNotFoundException($this->l->t('Invalid date, date format must be YYYY-MM-DD'));
-				}
-			}
-		} else if ($shareType === Share::SHARE_TYPE_REMOTE) {
-			if (!$this->shareManager->outgoingServer2ServerSharesAllowed()) {
-				throw new OCSForbiddenException($this->l->t('Sharing %1$s failed because the back end does not allow shares from type %2$s', [$path->getPath(), $shareType]));
-			}
-
-			$share->setSharedWith($shareWith);
-			$share->setPermissions($permissions);
-		} else if ($shareType === Share::SHARE_TYPE_REMOTE_GROUP) {
-			if (!$this->shareManager->outgoingServer2ServerGroupSharesAllowed()) {
-				throw new OCSForbiddenException($this->l->t('Sharing %1$s failed because the back end does not allow shares from type %2$s', [$path->getPath(), $shareType]));
-			}
-
-			$share->setSharedWith($shareWith);
-			$share->setPermissions($permissions);
-		} else if ($shareType === Share::SHARE_TYPE_CIRCLE) {
-			if (!\OC::$server->getAppManager()->isEnabledForUser('circles') || !class_exists('\OCA\Circles\ShareByCircleProvider')) {
-				throw new OCSNotFoundException($this->l->t('You cannot share to a Circle if the app is not enabled'));
-			}
-
-			$circle = \OCA\Circles\Api\v1\Circles::detailsCircle($shareWith);
-
-			// Valid circle is required to share
-			if ($circle === null) {
-				throw new OCSNotFoundException($this->l->t('Please specify a valid circle'));
-			}
-			$share->setSharedWith($shareWith);
-			$share->setPermissions($permissions);
-		} else if ($shareType === Share::SHARE_TYPE_ROOM) {
-			try {
-				$this->getRoomShareHelper()->createShare($share, $shareWith, $permissions, $expireDate);
-			} catch (QueryException $e) {
-				throw new OCSForbiddenException($this->l->t('Sharing %s failed because the back end does not support room shares', [$path->getPath()]));
-			}
-		} else {
-			throw new OCSBadRequestException($this->l->t('Unknown share type'));
-		}
-
-		$share->setShareType($shareType);
-		$share->setSharedBy($this->currentUser);
-
-		try {
-			$share = $this->shareManager->createShare($share);
-		} catch (GenericShareException $e) {
-			$code = $e->getCode() === 0 ? 403 : $e->getCode();
-			throw new OCSException($e->getHint(), $code);
-		} catch (\Exception $e) {
-			throw new OCSForbiddenException($e->getMessage(), $e);
-		}
-
-		$output = $this->formatShare($share);
-
-		return new DataResponse($output);
-	}
-
-	/**
-	 * @param null|Node $node
-	 * @param boolean $includeTags
-	 *
-	 * @return array
-	 */
-	private function getSharedWithMe($node, bool $includeTags): array {
-
-		$userShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_USER, $node, -1, 0);
-		$groupShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_GROUP, $node, -1, 0);
-		$circleShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_CIRCLE, $node, -1, 0);
-		$roomShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_ROOM, $node, -1, 0);
-
-		$shares = array_merge($userShares, $groupShares, $circleShares, $roomShares);
-
-		$shares = array_filter($shares, function(IShare $share) {
-			return $share->getShareOwner() !== $this->currentUser;
-		});
-
-		$formatted = [];
-		foreach ($shares as $share) {
-			if ($this->canAccessShare($share)) {
-				try {
-					$formatted[] = $this->formatShare($share);
-				} catch (NotFoundException $e) {
-					// Ignore this share
-				}
-			}
-		}
-
-		if ($includeTags) {
-			$formatted = Helper::populateTags($formatted, 'file_source', \OC::$server->getTagManager());
-		}
-
-		return $formatted;
-	}
-
-	/**
-	 * @param \OCP\Files\Node $folder
-	 *
-	 * @return array
-	 * @throws OCSBadRequestException
-	 * @throws NotFoundException
-	 */
-	private function getSharesInDir(Node $folder): array {
-		if (!($folder instanceof \OCP\Files\Folder)) {
-			throw new OCSBadRequestException($this->l->t('Not a directory'));
-		}
-
-		$nodes = $folder->getDirectoryListing();
-
-		/** @var \OCP\Share\IShare[] $shares */
-		$shares = array_reduce($nodes, function($carry, $node) {
-			$carry = array_merge($carry, $this->getAllShares($node, true));
-			return $carry;
-		}, []);
-
-		// filter out duplicate shares
-		$known = [];
-
-
-		$formatted = $miniFormatted = [];
-		$resharingRight = false;
-		$known = [];
-		foreach ($shares as $share) {
-			if (in_array($share->getId(), $known) || $share->getSharedWith() === $this->currentUser) {
-				continue;
-			}
-
-			try {
-				$format = $this->formatShare($share);
-
-				$known[] = $share->getId();
-				$formatted[] = $format;
-				if ($share->getSharedBy() === $this->currentUser) {
-					$miniFormatted[] = $format;
-				}
-				if (!$resharingRight && $this->shareProviderResharingRights($this->currentUser, $share, $folder)) {
-					$resharingRight = true;
-				}
-			} catch (\Exception $e) {
-				//Ignore this share
-			}
-		}
-
-		if (!$resharingRight) {
-			$formatted = $miniFormatted;
-		}
-
-		return $formatted;
-	}
-
-	/**
-	 * The getShares function.
-	 *
-	 * @NoAdminRequired
-	 *
-	 * @param string $shared_with_me
-	 * @param string $reshares
-	 * @param string $subfiles
-	 * @param string $path
-	 *
-	 * - 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=..)
-	 *
-	 * @param string $include_tags
-	 *
-	 * @return DataResponse
-	 * @throws NotFoundException
-	 * @throws OCSBadRequestException
-	 * @throws OCSNotFoundException
-	 */
-	public function getShares(
-		string $shared_with_me = 'false',
-		string $reshares = 'false',
-		string $subfiles = 'false',
-		string $path = '',
-		string $include_tags = 'false'
-	): DataResponse {
-
-		$node = null;
-		if ($path !== '') {
-			$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
-			try {
-				$node = $userFolder->get($path);
-				$this->lock($node);
-			} catch (NotFoundException $e) {
-				throw new OCSNotFoundException(
-					$this->l->t('Wrong path, file/folder doesn\'t exist')
-				);
-			} catch (LockedException $e) {
-				throw new OCSNotFoundException($this->l->t('Could not lock node'));
-			}
-		}
-
-		$shares = $this->getFormattedShares(
-			$this->currentUser,
-			$node,
-			($shared_with_me === 'true'),
-			($reshares === 'true'),
-			($subfiles === 'true'),
-			($include_tags === 'true')
-		);
-
-		return new DataResponse($shares);
-	}
-
-
-	/**
-	 * @param string $viewer
-	 * @param Node $node
-	 * @param bool $sharedWithMe
-	 * @param bool $reShares
-	 * @param bool $subFiles
-	 * @param bool $includeTags
-	 *
-	 * @return array
-	 * @throws NotFoundException
-	 * @throws OCSBadRequestException
-	 */
-	private function getFormattedShares(
-		string $viewer, $node = null, bool $sharedWithMe = false, bool $reShares = false,
-		bool $subFiles = false, bool $includeTags = false
-	): array {
-
-		if ($sharedWithMe) {
-			return $this->getSharedWithMe($node, $includeTags);
-		}
-
-		if ($subFiles) {
-			return $this->getSharesInDir($node);
-		}
-
-		$shares = $this->getSharesFromNode($viewer, $node, $reShares);
-
-		$known = $formatted = $miniFormatted = [];
-		$resharingRight = false;
-		foreach ($shares as $share) {
-			try {
-				$share->getNode();
-			} catch (NotFoundException $e) {
-				/*
+    /** @var IManager */
+    private $shareManager;
+    /** @var IGroupManager */
+    private $groupManager;
+    /** @var IUserManager */
+    private $userManager;
+    /** @var IRootFolder */
+    private $rootFolder;
+    /** @var IURLGenerator */
+    private $urlGenerator;
+    /** @var string */
+    private $currentUser;
+    /** @var IL10N */
+    private $l;
+    /** @var \OCP\Files\Node */
+    private $lockedNode;
+    /** @var IConfig */
+    private $config;
+    /** @var IAppManager */
+    private $appManager;
+    /** @var IServerContainer */
+    private $serverContainer;
+
+    /**
+     * Share20OCS constructor.
+     *
+     * @param string $appName
+     * @param IRequest $request
+     * @param IManager $shareManager
+     * @param IGroupManager $groupManager
+     * @param IUserManager $userManager
+     * @param IRootFolder $rootFolder
+     * @param IURLGenerator $urlGenerator
+     * @param string $userId
+     * @param IL10N $l10n
+     * @param IConfig $config
+     * @param IAppManager $appManager
+     * @param IServerContainer $serverContainer
+     */
+    public function __construct(
+        string $appName,
+        IRequest $request,
+        IManager $shareManager,
+        IGroupManager $groupManager,
+        IUserManager $userManager,
+        IRootFolder $rootFolder,
+        IURLGenerator $urlGenerator,
+        string $userId = null,
+        IL10N $l10n,
+        IConfig $config,
+        IAppManager $appManager,
+        IServerContainer $serverContainer
+    ) {
+        parent::__construct($appName, $request);
+
+        $this->shareManager = $shareManager;
+        $this->userManager = $userManager;
+        $this->groupManager = $groupManager;
+        $this->request = $request;
+        $this->rootFolder = $rootFolder;
+        $this->urlGenerator = $urlGenerator;
+        $this->currentUser = $userId;
+        $this->l = $l10n;
+        $this->config = $config;
+        $this->appManager = $appManager;
+        $this->serverContainer = $serverContainer;
+    }
+
+    /**
+     * Convert an IShare to an array for OCS output
+     *
+     * @param \OCP\Share\IShare $share
+     * @param Node|null $recipientNode
+     * @return array
+     * @throws NotFoundException In case the node can't be resolved.
+     *
+     * @suppress PhanUndeclaredClassMethod
+     */
+    protected function formatShare(\OCP\Share\IShare $share, Node $recipientNode = null): array {
+        $sharedBy = $this->userManager->get($share->getSharedBy());
+        $shareOwner = $this->userManager->get($share->getShareOwner());
+
+        $result = [
+            'id' => $share->getId(),
+            'share_type' => $share->getShareType(),
+            'uid_owner' => $share->getSharedBy(),
+            'displayname_owner' => $sharedBy !== null ? $sharedBy->getDisplayName() : $share->getSharedBy(),
+            // recipient permissions
+            'permissions' => $share->getPermissions(),
+            // current user permissions on this share
+            'can_edit' => $this->canEditShare($share),
+            'can_delete' => $this->canDeleteShare($share),
+            'stime' => $share->getShareTime()->getTimestamp(),
+            'parent' => null,
+            'expiration' => null,
+            'token' => null,
+            'uid_file_owner' => $share->getShareOwner(),
+            'note' => $share->getNote(),
+            'label' => $share->getLabel(),
+            'displayname_file_owner' => $shareOwner !== null ? $shareOwner->getDisplayName() : $share->getShareOwner(),
+        ];
+
+        $userFolder = $this->rootFolder->getUserFolder($this->currentUser);
+        if ($recipientNode) {
+            $node = $recipientNode;
+        } else {
+            $nodes = $userFolder->getById($share->getNodeId());
+            if (empty($nodes)) {
+                // fallback to guessing the path
+                $node = $userFolder->get($share->getTarget());
+                if ($node === null || $share->getTarget() === '') {
+                    throw new NotFoundException();
+                }
+            } else {
+                $node = reset($nodes);
+            }
+        }
+
+        $result['path'] = $userFolder->getRelativePath($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();
+
+        $expiration = $share->getExpirationDate();
+        if ($expiration !== null) {
+            $result['expiration'] = $expiration->format('Y-m-d 00:00:00');
+        }
+
+        if ($share->getShareType() === 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() === Share::SHARE_TYPE_GROUP) {
+            $group = $this->groupManager->get($share->getSharedWith());
+            $result['share_with'] = $share->getSharedWith();
+            $result['share_with_displayname'] = $group !== null ? $group->getDisplayName() : $share->getSharedWith();
+        } else if ($share->getShareType() === IShare::TYPE_LINK) {
+
+            // "share_with" and "share_with_displayname" for passwords of link
+            // shares was deprecated in Nextcloud 15, use "password" instead.
+            $result['share_with'] = $share->getPassword();
+            $result['share_with_displayname'] = '(' . $this->l->t('Shared link') . ')';
+
+            $result['password'] = $share->getPassword();
+
+            $result['send_password_by_talk'] = $share->getSendPasswordByTalk();
+
+            $result['token'] = $share->getToken();
+            $result['url'] = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.showShare', ['token' => $share->getToken()]);
+        } else if ($share->getShareType() === Share::SHARE_TYPE_REMOTE || $share->getShareType() === Share::SHARE_TYPE_REMOTE_GROUP) {
+            $result['share_with'] = $share->getSharedWith();
+            $result['share_with_displayname'] = $this->getDisplayNameFromAddressBook($share->getSharedWith(), 'CLOUD');
+            $result['token'] = $share->getToken();
+        } else if ($share->getShareType() === Share::SHARE_TYPE_EMAIL) {
+            $result['share_with'] = $share->getSharedWith();
+            $result['password'] = $share->getPassword();
+            $result['send_password_by_talk'] = $share->getSendPasswordByTalk();
+            $result['share_with_displayname'] = $this->getDisplayNameFromAddressBook($share->getSharedWith(), 'EMAIL');
+            $result['token'] = $share->getToken();
+        } else if ($share->getShareType() === Share::SHARE_TYPE_CIRCLE) {
+            // getSharedWith() returns either "name (type, owner)" or
+            // "name (type, owner) [id]", depending on the Circles app version.
+            $hasCircleId = (substr($share->getSharedWith(), -1) === ']');
+
+            $result['share_with_displayname'] = $share->getSharedWithDisplayName();
+            if (empty($result['share_with_displayname'])) {
+                $displayNameLength = ($hasCircleId ? strrpos($share->getSharedWith(), ' ') : strlen($share->getSharedWith()));
+                $result['share_with_displayname'] = substr($share->getSharedWith(), 0, $displayNameLength);
+            }
+
+            $result['share_with_avatar'] = $share->getSharedWithAvatar();
+
+            $shareWithStart = ($hasCircleId ? strrpos($share->getSharedWith(), '[') + 1 : 0);
+            $shareWithLength = ($hasCircleId ? -1 : strpos($share->getSharedWith(), ' '));
+            if (is_bool($shareWithLength)) {
+                $shareWithLength = -1;
+            }
+            $result['share_with'] = substr($share->getSharedWith(), $shareWithStart, $shareWithLength);
+        } else if ($share->getShareType() === Share::SHARE_TYPE_ROOM) {
+            $result['share_with'] = $share->getSharedWith();
+            $result['share_with_displayname'] = '';
+
+            try {
+                $result = array_merge($result, $this->getRoomShareHelper()->formatShare($share));
+            } catch (QueryException $e) {}
+        }
+
+
+        $result['mail_send'] = $share->getMailSend() ? 1 : 0;
+        $result['hide_download'] = $share->getHideDownload() ? 1 : 0;
+
+        return $result;
+    }
+
+    /**
+     * Check if one of the users address books knows the exact property, if
+     * yes we return the full name.
+     *
+     * @param string $query
+     * @param string $property
+     * @return string
+     */
+    private function getDisplayNameFromAddressBook(string $query, string $property): string {
+        // FIXME: If we inject the contacts manager it gets initialized bofore any address books are registered
+        $result = \OC::$server->getContactsManager()->search($query, [$property]);
+        foreach ($result as $r) {
+            foreach ($r[$property] as $value) {
+                if ($value === $query) {
+                    return $r['FN'];
+                }
+            }
+        }
+
+        return $query;
+    }
+
+    /**
+     * Get a specific share by id
+     *
+     * @NoAdminRequired
+     *
+     * @param string $id
+     * @return DataResponse
+     * @throws OCSNotFoundException
+     */
+    public function getShare(string $id): DataResponse {
+        try {
+            $share = $this->getShareById($id);
+        } catch (ShareNotFound $e) {
+            throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+        }
+
+        try {
+            if ($this->canAccessShare($share)) {
+                $share = $this->formatShare($share);
+                return new DataResponse([$share]);
+            }
+        } catch (NotFoundException $e) {
+            // Fall trough
+        }
+
+        throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+    }
+
+    /**
+     * Delete a share
+     *
+     * @NoAdminRequired
+     *
+     * @param string $id
+     * @return DataResponse
+     * @throws OCSNotFoundException
+     */
+    public function deleteShare(string $id): DataResponse {
+        try {
+            $share = $this->getShareById($id);
+        } catch (ShareNotFound $e) {
+            throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+        }
+
+        try {
+            $this->lock($share->getNode());
+        } catch (LockedException $e) {
+            throw new OCSNotFoundException($this->l->t('Could not delete share'));
+        }
+
+        if (!$this->canAccessShare($share)) {
+            throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+        }
+
+        // if it's a group share or a room share
+        // we don't delete the share, but only the
+        // mount point. Allowing it to be restored
+        // from the deleted shares
+        if ($this->canDeleteShareFromSelf($share)) {
+            $this->shareManager->deleteFromSelf($share, $this->currentUser);
+        } else {
+            if (!$this->canDeleteShare($share)) {
+                throw new OCSForbiddenException($this->l->t('Could not delete share'));
+            }
+
+            $this->shareManager->deleteShare($share);
+        }
+
+        return new DataResponse();
+    }
+
+    /**
+     * @NoAdminRequired
+     *
+     * @param string $path
+     * @param int $permissions
+     * @param int $shareType
+     * @param string $shareWith
+     * @param string $publicUpload
+     * @param string $password
+     * @param string $sendPasswordByTalk
+     * @param string $expireDate
+     * @param string $label
+     *
+     * @return DataResponse
+     * @throws NotFoundException
+     * @throws OCSBadRequestException
+     * @throws OCSException
+     * @throws OCSForbiddenException
+     * @throws OCSNotFoundException
+     * @throws InvalidPathException
+     * @suppress PhanUndeclaredClassMethod
+     */
+    public function createShare(
+        string $path = null,
+        int $permissions = null,
+        int $shareType = -1,
+        string $shareWith = null,
+        string $publicUpload = 'false',
+        string $password = '',
+        string $sendPasswordByTalk = null,
+        string $expireDate = '',
+        string $label = ''
+    ): DataResponse {
+        $share = $this->shareManager->newShare();
+
+        if ($permissions === null) {
+            $permissions = $this->config->getAppValue('core', 'shareapi_default_permissions', Constants::PERMISSION_ALL);
+        }
+
+        // Verify path
+        if ($path === null) {
+            throw new OCSNotFoundException($this->l->t('Please specify a file or folder path'));
+        }
+
+        $userFolder = $this->rootFolder->getUserFolder($this->currentUser);
+        try {
+            $path = $userFolder->get($path);
+        } catch (NotFoundException $e) {
+            throw new OCSNotFoundException($this->l->t('Wrong path, file/folder doesn\'t exist'));
+        }
+
+        $share->setNode($path);
+
+        try {
+            $this->lock($share->getNode());
+        } catch (LockedException $e) {
+            throw new OCSNotFoundException($this->l->t('Could not create share'));
+        }
+
+        if ($permissions < 0 || $permissions > Constants::PERMISSION_ALL) {
+            throw new OCSNotFoundException($this->l->t('invalid permissions'));
+        }
+
+        // Shares always require read permissions
+        $permissions |= Constants::PERMISSION_READ;
+
+        if ($path instanceof \OCP\Files\File) {
+            // Single file shares should never have delete or create permissions
+            $permissions &= ~Constants::PERMISSION_DELETE;
+            $permissions &= ~Constants::PERMISSION_CREATE;
+        }
+
+        /**
+         * Hack for https://github.com/owncloud/core/issues/22587
+         * We check the permissions via webdav. But the permissions of the mount point
+         * do not equal the share permissions. Here we fix that for federated mounts.
+         */
+        if ($path->getStorage()->instanceOfStorage(Storage::class)) {
+            $permissions &= ~($permissions & ~$path->getPermissions());
+        }
+
+        if ($shareType === Share::SHARE_TYPE_USER) {
+            // Valid user is required to share
+            if ($shareWith === null || !$this->userManager->userExists($shareWith)) {
+                throw new OCSNotFoundException($this->l->t('Please specify a valid user'));
+            }
+            $share->setSharedWith($shareWith);
+            $share->setPermissions($permissions);
+        } else if ($shareType === Share::SHARE_TYPE_GROUP) {
+            if (!$this->shareManager->allowGroupSharing()) {
+                throw new OCSNotFoundException($this->l->t('Group sharing is disabled by the administrator'));
+            }
+
+            // Valid group is required to share
+            if ($shareWith === null || !$this->groupManager->groupExists($shareWith)) {
+                throw new OCSNotFoundException($this->l->t('Please specify a valid group'));
+            }
+            $share->setSharedWith($shareWith);
+            $share->setPermissions($permissions);
+        } else if ($shareType === Share::SHARE_TYPE_LINK
+            || $shareType === Share::SHARE_TYPE_EMAIL) {
+
+            // Can we even share links?
+            if (!$this->shareManager->shareApiAllowLinks()) {
+                throw new OCSNotFoundException($this->l->t('Public link sharing is disabled by the administrator'));
+            }
+
+            if ($publicUpload === 'true') {
+                // Check if public upload is allowed
+                if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
+                    throw new OCSForbiddenException($this->l->t('Public upload disabled by the administrator'));
+                }
+
+                // Public upload can only be set for folders
+                if ($path instanceof \OCP\Files\File) {
+                    throw new OCSNotFoundException($this->l->t('Public upload is only possible for publicly shared folders'));
+                }
+
+                $share->setPermissions(
+                    Constants::PERMISSION_READ |
+                    Constants::PERMISSION_CREATE |
+                    Constants::PERMISSION_UPDATE |
+                    Constants::PERMISSION_DELETE
+                );
+            } else {
+                $share->setPermissions(Constants::PERMISSION_READ);
+            }
+
+            // Set password
+            if ($password !== '') {
+                $share->setPassword($password);
+            }
+
+            // Only share by mail have a recipient
+            if ($shareType === Share::SHARE_TYPE_EMAIL) {
+                $share->setSharedWith($shareWith);
+            } else {
+                // Only link share have a label
+                if (!empty($label)) {
+                    $share->setLabel($label);
+                }
+            }
+
+            if ($sendPasswordByTalk === 'true') {
+                if (!$this->appManager->isEnabledForUser('spreed')) {
+                    throw new OCSForbiddenException($this->l->t('Sharing %s sending the password by Nextcloud Talk failed because Nextcloud Talk is not enabled', [$path->getPath()]));
+                }
+
+                $share->setSendPasswordByTalk(true);
+            }
+
+            //Expire date
+            if ($expireDate !== '') {
+                try {
+                    $expireDate = $this->parseDate($expireDate);
+                    $share->setExpirationDate($expireDate);
+                } catch (\Exception $e) {
+                    throw new OCSNotFoundException($this->l->t('Invalid date, date format must be YYYY-MM-DD'));
+                }
+            }
+        } else if ($shareType === Share::SHARE_TYPE_REMOTE) {
+            if (!$this->shareManager->outgoingServer2ServerSharesAllowed()) {
+                throw new OCSForbiddenException($this->l->t('Sharing %1$s failed because the back end does not allow shares from type %2$s', [$path->getPath(), $shareType]));
+            }
+
+            $share->setSharedWith($shareWith);
+            $share->setPermissions($permissions);
+        } else if ($shareType === Share::SHARE_TYPE_REMOTE_GROUP) {
+            if (!$this->shareManager->outgoingServer2ServerGroupSharesAllowed()) {
+                throw new OCSForbiddenException($this->l->t('Sharing %1$s failed because the back end does not allow shares from type %2$s', [$path->getPath(), $shareType]));
+            }
+
+            $share->setSharedWith($shareWith);
+            $share->setPermissions($permissions);
+        } else if ($shareType === Share::SHARE_TYPE_CIRCLE) {
+            if (!\OC::$server->getAppManager()->isEnabledForUser('circles') || !class_exists('\OCA\Circles\ShareByCircleProvider')) {
+                throw new OCSNotFoundException($this->l->t('You cannot share to a Circle if the app is not enabled'));
+            }
+
+            $circle = \OCA\Circles\Api\v1\Circles::detailsCircle($shareWith);
+
+            // Valid circle is required to share
+            if ($circle === null) {
+                throw new OCSNotFoundException($this->l->t('Please specify a valid circle'));
+            }
+            $share->setSharedWith($shareWith);
+            $share->setPermissions($permissions);
+        } else if ($shareType === Share::SHARE_TYPE_ROOM) {
+            try {
+                $this->getRoomShareHelper()->createShare($share, $shareWith, $permissions, $expireDate);
+            } catch (QueryException $e) {
+                throw new OCSForbiddenException($this->l->t('Sharing %s failed because the back end does not support room shares', [$path->getPath()]));
+            }
+        } else {
+            throw new OCSBadRequestException($this->l->t('Unknown share type'));
+        }
+
+        $share->setShareType($shareType);
+        $share->setSharedBy($this->currentUser);
+
+        try {
+            $share = $this->shareManager->createShare($share);
+        } catch (GenericShareException $e) {
+            $code = $e->getCode() === 0 ? 403 : $e->getCode();
+            throw new OCSException($e->getHint(), $code);
+        } catch (\Exception $e) {
+            throw new OCSForbiddenException($e->getMessage(), $e);
+        }
+
+        $output = $this->formatShare($share);
+
+        return new DataResponse($output);
+    }
+
+    /**
+     * @param null|Node $node
+     * @param boolean $includeTags
+     *
+     * @return array
+     */
+    private function getSharedWithMe($node, bool $includeTags): array {
+
+        $userShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_USER, $node, -1, 0);
+        $groupShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_GROUP, $node, -1, 0);
+        $circleShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_CIRCLE, $node, -1, 0);
+        $roomShares = $this->shareManager->getSharedWith($this->currentUser, Share::SHARE_TYPE_ROOM, $node, -1, 0);
+
+        $shares = array_merge($userShares, $groupShares, $circleShares, $roomShares);
+
+        $shares = array_filter($shares, function(IShare $share) {
+            return $share->getShareOwner() !== $this->currentUser;
+        });
+
+        $formatted = [];
+        foreach ($shares as $share) {
+            if ($this->canAccessShare($share)) {
+                try {
+                    $formatted[] = $this->formatShare($share);
+                } catch (NotFoundException $e) {
+                    // Ignore this share
+                }
+            }
+        }
+
+        if ($includeTags) {
+            $formatted = Helper::populateTags($formatted, 'file_source', \OC::$server->getTagManager());
+        }
+
+        return $formatted;
+    }
+
+    /**
+     * @param \OCP\Files\Node $folder
+     *
+     * @return array
+     * @throws OCSBadRequestException
+     * @throws NotFoundException
+     */
+    private function getSharesInDir(Node $folder): array {
+        if (!($folder instanceof \OCP\Files\Folder)) {
+            throw new OCSBadRequestException($this->l->t('Not a directory'));
+        }
+
+        $nodes = $folder->getDirectoryListing();
+
+        /** @var \OCP\Share\IShare[] $shares */
+        $shares = array_reduce($nodes, function($carry, $node) {
+            $carry = array_merge($carry, $this->getAllShares($node, true));
+            return $carry;
+        }, []);
+
+        // filter out duplicate shares
+        $known = [];
+
+
+        $formatted = $miniFormatted = [];
+        $resharingRight = false;
+        $known = [];
+        foreach ($shares as $share) {
+            if (in_array($share->getId(), $known) || $share->getSharedWith() === $this->currentUser) {
+                continue;
+            }
+
+            try {
+                $format = $this->formatShare($share);
+
+                $known[] = $share->getId();
+                $formatted[] = $format;
+                if ($share->getSharedBy() === $this->currentUser) {
+                    $miniFormatted[] = $format;
+                }
+                if (!$resharingRight && $this->shareProviderResharingRights($this->currentUser, $share, $folder)) {
+                    $resharingRight = true;
+                }
+            } catch (\Exception $e) {
+                //Ignore this share
+            }
+        }
+
+        if (!$resharingRight) {
+            $formatted = $miniFormatted;
+        }
+
+        return $formatted;
+    }
+
+    /**
+     * The getShares function.
+     *
+     * @NoAdminRequired
+     *
+     * @param string $shared_with_me
+     * @param string $reshares
+     * @param string $subfiles
+     * @param string $path
+     *
+     * - 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=..)
+     *
+     * @param string $include_tags
+     *
+     * @return DataResponse
+     * @throws NotFoundException
+     * @throws OCSBadRequestException
+     * @throws OCSNotFoundException
+     */
+    public function getShares(
+        string $shared_with_me = 'false',
+        string $reshares = 'false',
+        string $subfiles = 'false',
+        string $path = '',
+        string $include_tags = 'false'
+    ): DataResponse {
+
+        $node = null;
+        if ($path !== '') {
+            $userFolder = $this->rootFolder->getUserFolder($this->currentUser);
+            try {
+                $node = $userFolder->get($path);
+                $this->lock($node);
+            } catch (NotFoundException $e) {
+                throw new OCSNotFoundException(
+                    $this->l->t('Wrong path, file/folder doesn\'t exist')
+                );
+            } catch (LockedException $e) {
+                throw new OCSNotFoundException($this->l->t('Could not lock node'));
+            }
+        }
+
+        $shares = $this->getFormattedShares(
+            $this->currentUser,
+            $node,
+            ($shared_with_me === 'true'),
+            ($reshares === 'true'),
+            ($subfiles === 'true'),
+            ($include_tags === 'true')
+        );
+
+        return new DataResponse($shares);
+    }
+
+
+    /**
+     * @param string $viewer
+     * @param Node $node
+     * @param bool $sharedWithMe
+     * @param bool $reShares
+     * @param bool $subFiles
+     * @param bool $includeTags
+     *
+     * @return array
+     * @throws NotFoundException
+     * @throws OCSBadRequestException
+     */
+    private function getFormattedShares(
+        string $viewer, $node = null, bool $sharedWithMe = false, bool $reShares = false,
+        bool $subFiles = false, bool $includeTags = false
+    ): array {
+
+        if ($sharedWithMe) {
+            return $this->getSharedWithMe($node, $includeTags);
+        }
+
+        if ($subFiles) {
+            return $this->getSharesInDir($node);
+        }
+
+        $shares = $this->getSharesFromNode($viewer, $node, $reShares);
+
+        $known = $formatted = $miniFormatted = [];
+        $resharingRight = false;
+        foreach ($shares as $share) {
+            try {
+                $share->getNode();
+            } catch (NotFoundException $e) {
+                /*
 				 * Ignore shares where we can't get the node
 				 * For example delted shares
 				 */
-				continue;
-			}
-
-			if (in_array($share->getId(), $known) || $share->getSharedWith() === $this->currentUser) {
-				continue;
-			}
-
-			$known[] = $share->getId();
-			try {
-				/** @var IShare $share */
-				$format = $this->formatShare($share, $node);
-				$formatted[] = $format;
-
-				// let's also build a list of shares created
-				// by the current user only, in case
-				// there is no resharing rights
-				if ($share->getSharedBy() === $this->currentUser) {
-					$miniFormatted[] = $format;
-				}
-
-				// check if one of those share is shared with me
-				// and if I have resharing rights on it
-				if (!$resharingRight && $this->shareProviderResharingRights($this->currentUser, $share, $node)) {
-					$resharingRight = true;
-				}
-			} catch (InvalidPathException | NotFoundException $e) {
-			}
-		}
-
-		if (!$resharingRight) {
-			$formatted = $miniFormatted;
-		}
-
-		if ($includeTags) {
-			$formatted =
-				Helper::populateTags($formatted, 'file_source', \OC::$server->getTagManager());
-		}
-
-		return $formatted;
-	}
-
-
-	/**
-	 * The getInheritedShares function.
-	 * returns all shares relative to a file, including parent folders shares rights.
-	 *
-	 * @NoAdminRequired
-	 *
-	 * @param string $path
-	 *
-	 * - 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 DataResponse
-	 * @throws InvalidPathException
-	 * @throws NotFoundException
-	 * @throws OCSNotFoundException
-	 * @throws OCSBadRequestException
-	 * @throws SharingRightsException
-	 */
-	public function getInheritedShares(string $path): DataResponse {
-
-		// get Node from (string) path.
-		$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
-		try {
-			$node = $userFolder->get($path);
-			$this->lock($node);
-		} catch (\OCP\Files\NotFoundException $e) {
-			throw new OCSNotFoundException($this->l->t('Wrong path, file/folder doesn\'t exist'));
-		} catch (LockedException $e) {
-			throw new OCSNotFoundException($this->l->t('Could not lock path'));
-		}
-
-		// current User has resharing rights ?
-		$this->confirmSharingRights($node);
-
-		// initiate real owner.
-		$owner = $node->getOwner()
-					  ->getUID();
-		if (!$this->userManager->userExists($owner)) {
-			return new DataResponse([]);
-		}
-
-		// get node based on the owner, fix owner in case of external storage
-		$userFolder = $this->rootFolder->getUserFolder($owner);
-		if ($node->getId() !== $userFolder->getId() && !$userFolder->isSubNode($node)) {
-			$owner = $node->getOwner()
-						  ->getUID();
-			$userFolder = $this->rootFolder->getUserFolder($owner);
-			$nodes = $userFolder->getById($node->getId());
-			$node = array_shift($nodes);
-		}
-		$basePath = $userFolder->getPath();
-
-		// generate node list for each parent folders
-		/** @var Node[] $nodes */
-		$nodes = [];
-		while ($node->getPath() !== $basePath) {
-			$node = $node->getParent();
-			$nodes[] = $node;
-		}
-
-		// for each nodes, retrieve shares.
-		$shares = [];
-		foreach ($nodes as $node) {
-			$getShares = $this->getFormattedShares($owner, $node, false, true);
-			$this->mergeFormattedShares($shares, $getShares);
-		}
-
-		return new DataResponse(array_values($shares));
-	}
-
-
-	/**
-	 * @NoAdminRequired
-	 *
-	 * @param string $id
-	 * @param int $permissions
-	 * @param string $password
-	 * @param string $sendPasswordByTalk
-	 * @param string $publicUpload
-	 * @param string $expireDate
-	 * @param string $note
-	 * @param string $label
-	 * @param string $hideDownload
-	 * @return DataResponse
-	 * @throws LockedException
-	 * @throws NotFoundException
-	 * @throws OCSBadRequestException
-	 * @throws OCSForbiddenException
-	 * @throws OCSNotFoundException
-	 */
-	public function updateShare(
-		string $id,
-		int $permissions = null,
-		string $password = null,
-		string $sendPasswordByTalk = null,
-		string $publicUpload = null,
-		string $expireDate = null,
-		string $note = null,
-		string $label = null,
-		string $hideDownload = null
-	): DataResponse {
-		try {
-			$share = $this->getShareById($id);
-		} catch (ShareNotFound $e) {
-			throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-		}
-
-		$this->lock($share->getNode());
-
-		if (!$this->canAccessShare($share, false)) {
-			throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-		}
-
-		if (!$this->canEditShare($share)) {
-			throw new OCSForbiddenException('You are not allowed to edit incoming shares');
-		}
-
-		if (
-			$permissions === null &&
-			$password === null &&
-			$sendPasswordByTalk === null &&
-			$publicUpload === null &&
-			$expireDate === null &&
-			$note === null &&
-			$label === null &&
-			$hideDownload === null
-		) {
-			throw new OCSBadRequestException($this->l->t('Wrong or no update parameter given'));
-		}
-
-		if ($note !== null) {
-			$share->setNote($note);
-		}
-
-		/**
-		 * expirationdate, password and publicUpload only make sense for link shares
-		 */
-		if ($share->getShareType() === Share::SHARE_TYPE_LINK
-			|| $share->getShareType() === Share::SHARE_TYPE_EMAIL) {
-
-			/**
-			 * We do not allow editing link shares that the current user
-			 * doesn't own. This is confusing and lead to errors when
-			 * someone else edit a password or expiration date without
-			 * the share owner knowing about it.
-			 * We only allow deletion
-			 */
-
-			if ($share->getSharedBy() !== $this->currentUser) {
-				throw new OCSForbiddenException('You are not allowed to edit link shares that you don\'t own');
-			}
-
-			// Update hide download state
-			if ($hideDownload === 'true') {
-				$share->setHideDownload(true);
-			} else if ($hideDownload === 'false') {
-				$share->setHideDownload(false);
-			}
-
-			$newPermissions = null;
-			if ($publicUpload === 'true') {
-				$newPermissions = Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE;
-			} else if ($publicUpload === 'false') {
-				$newPermissions = Constants::PERMISSION_READ;
-			}
-
-			if ($permissions !== null) {
-				$newPermissions = (int) $permissions;
-				$newPermissions = $newPermissions & ~Constants::PERMISSION_SHARE;
-			}
-
-			if ($newPermissions !== null &&
-				!in_array($newPermissions, [
-					Constants::PERMISSION_READ,
-					Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE, // legacy
-					Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE, // correct
-					Constants::PERMISSION_CREATE, // hidden file list
-					Constants::PERMISSION_READ | Constants::PERMISSION_UPDATE, // allow to edit single files
-				], true)
-			) {
-				throw new OCSBadRequestException($this->l->t('Can\'t change permissions for public share links'));
-			}
-
-			if (
-				// legacy
-				$newPermissions === (Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE) ||
-				// correct
-				$newPermissions === (Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE)
-			) {
-				if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
-					throw new OCSForbiddenException($this->l->t('Public upload disabled by the administrator'));
-				}
-
-				if (!($share->getNode() instanceof \OCP\Files\Folder)) {
-					throw new OCSBadRequestException($this->l->t('Public upload is only possible for publicly shared folders'));
-				}
-
-				// normalize to correct public upload permissions
-				$newPermissions = Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE;
-			}
-
-			if ($newPermissions !== null) {
-				$share->setPermissions($newPermissions);
-				$permissions = $newPermissions;
-			}
-
-			if ($expireDate === '') {
-				$share->setExpirationDate(null);
-			} else if ($expireDate !== null) {
-				try {
-					$expireDate = $this->parseDate($expireDate);
-				} catch (\Exception $e) {
-					throw new OCSBadRequestException($e->getMessage(), $e);
-				}
-				$share->setExpirationDate($expireDate);
-			}
-
-			if ($password === '') {
-				$share->setPassword(null);
-			} else if ($password !== null) {
-				$share->setPassword($password);
-			}
-
-			// only link shares have labels
-			if ($share->getShareType() === Share::SHARE_TYPE_LINK && $label !== null) {
-				$share->setLabel($label);
-			}
-
-			if ($sendPasswordByTalk === 'true') {
-				if (!$this->appManager->isEnabledForUser('spreed')) {
-					throw new OCSForbiddenException($this->l->t('Sharing sending the password by Nextcloud Talk failed because Nextcloud Talk is not enabled'));
-				}
-
-				$share->setSendPasswordByTalk(true);
-			} else if ($sendPasswordByTalk !== null) {
-				$share->setSendPasswordByTalk(false);
-			}
-		}
-
-		// NOT A LINK SHARE
-		else {
-			if ($permissions !== null) {
-				$permissions = (int) $permissions;
-				$share->setPermissions($permissions);
-			}
-
-			if ($expireDate === '') {
-				$share->setExpirationDate(null);
-			} else if ($expireDate !== null) {
-				try {
-					$expireDate = $this->parseDate($expireDate);
-				} catch (\Exception $e) {
-					throw new OCSBadRequestException($e->getMessage(), $e);
-				}
-				$share->setExpirationDate($expireDate);
-			}
-		}
-
-		try {
-			$share = $this->shareManager->updateShare($share);
-		} catch (GenericShareException $e) {
-			$code = $e->getCode() === 0 ? 403 : $e->getCode();
-			throw new OCSException($e->getHint(), $code);
-		} catch (\Exception $e) {
-			throw new OCSBadRequestException($e->getMessage(), $e);
-		}
-
-		return new DataResponse($this->formatShare($share));
-	}
-
-	/**
-	 * @NoAdminRequired
-	 */
-	public function pendingShares(): DataResponse {
-		$pendingShares = [];
-
-		$shareTypes = [
-			IShare::TYPE_USER,
-			IShare::TYPE_GROUP
-		];
-
-		foreach ($shareTypes as $shareType) {
-			$shares = $this->shareManager->getSharedWith($this->currentUser, $shareType, null, -1, 0);
-
-			foreach ($shares as $share) {
-				if ($share->getStatus() === IShare::STATUS_PENDING || $share->getStatus() === IShare::STATUS_REJECTED) {
-					$pendingShares[] = $share;
-				}
-			}
-		}
-
-		$result = array_filter(array_map(function (IShare $share) {
-			$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
-			$nodes = $userFolder->getById($share->getNodeId());
-			if (empty($nodes)) {
-				// fallback to guessing the path
-				$node = $userFolder->get($share->getTarget());
-				if ($node === null || $share->getTarget() === '') {
-					return null;
-				}
-			} else {
-				$node = $nodes[0];
-			}
-
-			try {
-				$formattedShare = $this->formatShare($share, $node);
-				$formattedShare['status'] = $share->getStatus();
-				$formattedShare['path'] = $share->getNode()->getName();
-				$formattedShare['permissions'] = 0;
-				return $formattedShare;
-			} catch (NotFoundException $e) {
-				return null;
-			}
-		}, $pendingShares), function ($entry) {
-			return $entry !== null;
-		});
-
-		return new DataResponse($result);
-	}
-
-	/**
-	 * @NoAdminRequired
-	 *
-	 * @param string $id
-	 * @return DataResponse
-	 * @throws OCSNotFoundException
-	 * @throws OCSException
-	 * @throws OCSBadRequestException
-	 */
-	public function acceptShare(string $id): DataResponse {
-		try {
-			$share = $this->getShareById($id);
-		} catch (ShareNotFound $e) {
-			throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-		}
-
-		if (!$this->canAccessShare($share)) {
-			throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
-		}
-
-		try {
-			$this->shareManager->acceptShare($share, $this->currentUser);
-		} catch (GenericShareException $e) {
-			$code = $e->getCode() === 0 ? 403 : $e->getCode();
-			throw new OCSException($e->getHint(), $code);
-		} catch (\Exception $e) {
-			throw new OCSBadRequestException($e->getMessage(), $e);
-		}
-
-		return new DataResponse();
-	}
-
-	/**
-	 * Does the user have read permission on the share
-	 *
-	 * @param \OCP\Share\IShare $share the share to check
-	 * @param boolean $checkGroups check groups as well?
-	 * @return boolean
-	 * @throws NotFoundException
-	 *
-	 * @suppress PhanUndeclaredClassMethod
-	 */
-	protected function canAccessShare(\OCP\Share\IShare $share, bool $checkGroups = true): bool {
-		// A file with permissions 0 can't be accessed by us. So Don't show it
-		if ($share->getPermissions() === 0) {
-			return false;
-		}
-
-		// Owner of the file and the sharer of the file can always get share
-		if ($share->getShareOwner() === $this->currentUser
-			|| $share->getSharedBy() === $this->currentUser) {
-			return true;
-		}
-
-		// If the share is shared with you, you can access it!
-		if ($share->getShareType() === Share::SHARE_TYPE_USER
-			&& $share->getSharedWith() === $this->currentUser) {
-			return true;
-		}
-
-		// Have reshare rights on the shared file/folder ?
-		// Does the currentUser have access to the shared file?
-		$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
-		$files = $userFolder->getById($share->getNodeId());
-		if (!empty($files) && $this->shareProviderResharingRights($this->currentUser, $share, $files[0])) {
-			return true;
-		}
-
-		// If in the recipient group, you can see the share
-		if ($checkGroups && $share->getShareType() === Share::SHARE_TYPE_GROUP) {
-			$sharedWith = $this->groupManager->get($share->getSharedWith());
-			$user = $this->userManager->get($this->currentUser);
-			if ($user !== null && $sharedWith !== null && $sharedWith->inGroup($user)) {
-				return true;
-			}
-		}
-
-		if ($share->getShareType() === Share::SHARE_TYPE_CIRCLE) {
-			// TODO: have a sanity check like above?
-			return true;
-		}
-
-		if ($share->getShareType() === Share::SHARE_TYPE_ROOM) {
-			try {
-				return $this->getRoomShareHelper()->canAccessShare($share, $this->currentUser);
-			} catch (QueryException $e) {
-				return false;
-			}
-		}
-
-		return false;
-	}
-
-	/**
-	 * Does the user have edit permission on the share
-	 *
-	 * @param \OCP\Share\IShare $share the share to check
-	 * @return boolean
-	 */
-	protected function canEditShare(\OCP\Share\IShare $share): bool {
-		// A file with permissions 0 can't be accessed by us. So Don't show it
-		if ($share->getPermissions() === 0) {
-			return false;
-		}
-
-		// The owner of the file and the creator of the share
-		// can always edit the share
-		if ($share->getShareOwner() === $this->currentUser ||
-			$share->getSharedBy() === $this->currentUser
-		) {
-			return true;
-		}
-
-		//! we do NOT support some kind of `admin` in groups.
-		//! You cannot edit shares shared to a group you're
-		//! a member of if you're not the share owner or the file owner!
-
-		return false;
-	}
-
-	/**
-	 * Does the user have delete permission on the share
-	 *
-	 * @param \OCP\Share\IShare $share the share to check
-	 * @return boolean
-	 */
-	protected function canDeleteShare(\OCP\Share\IShare $share): bool {
-		// A file with permissions 0 can't be accessed by us. So Don't show it
-		if ($share->getPermissions() === 0) {
-			return false;
-		}
-
-		// if the user is the recipient, i can unshare
-		// the share with self
-		if ($share->getShareType() === Share::SHARE_TYPE_USER &&
-			$share->getSharedWith() === $this->currentUser
-		) {
-			return true;
-		}
-
-		// The owner of the file and the creator of the share
-		// can always delete the share
-		if ($share->getShareOwner() === $this->currentUser ||
-			$share->getSharedBy() === $this->currentUser
-		) {
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	 * Does the user have delete permission on the share
-	 * This differs from the canDeleteShare function as it only
-	 * remove the share for the current user. It does NOT
-	 * completely delete the share but only the mount point.
-	 * It can then be restored from the deleted shares section.
-	 *
-	 * @param \OCP\Share\IShare $share the share to check
-	 * @return boolean
-	 *
-	 * @suppress PhanUndeclaredClassMethod
-	 */
-	protected function canDeleteShareFromSelf(\OCP\Share\IShare $share): bool {
-		if ($share->getShareType() !== IShare::TYPE_GROUP &&
-			$share->getShareType() !== IShare::TYPE_ROOM
-		) {
-			return false;
-		}
-
-		if ($share->getShareOwner() === $this->currentUser ||
-			$share->getSharedBy() === $this->currentUser
-		) {
-			// Delete the whole share, not just for self
-			return false;
-		}
-
-		// If in the recipient group, you can delete the share from self
-		if ($share->getShareType() === Share::SHARE_TYPE_GROUP) {
-			$sharedWith = $this->groupManager->get($share->getSharedWith());
-			$user = $this->userManager->get($this->currentUser);
-			if ($user !== null && $sharedWith !== null && $sharedWith->inGroup($user)) {
-				return true;
-			}
-		}
-
-		if ($share->getShareType() === Share::SHARE_TYPE_ROOM) {
-			try {
-				return $this->getRoomShareHelper()->canAccessShare($share, $this->currentUser);
-			} catch (QueryException $e) {
-				return false;
-			}
-		}
-
-		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(string $expireDate): \DateTime {
-		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(string $id): IShare {
-		$share = null;
-
-		// First check if it is an internal share.
-		try {
-			$share = $this->shareManager->getShareById('ocinternal:' . $id, $this->currentUser);
-			return $share;
-		} catch (ShareNotFound $e) {
-			// Do nothing, just try the other share type
-		}
-
-
-		try {
-			if ($this->shareManager->shareProviderExists(Share::SHARE_TYPE_CIRCLE)) {
-				$share = $this->shareManager->getShareById('ocCircleShare:' . $id, $this->currentUser);
-				return $share;
-			}
-		} catch (ShareNotFound $e) {
-			// Do nothing, just try the other share type
-		}
-
-		try {
-			if ($this->shareManager->shareProviderExists(Share::SHARE_TYPE_EMAIL)) {
-				$share = $this->shareManager->getShareById('ocMailShare:' . $id, $this->currentUser);
-				return $share;
-			}
-		} catch (ShareNotFound $e) {
-			// Do nothing, just try the other share type
-		}
-
-		try {
-			$share = $this->shareManager->getShareById('ocRoomShare:' . $id, $this->currentUser);
-			return $share;
-		} catch (ShareNotFound $e) {
-			// Do nothing, just try the other share type
-		}
-
-		if (!$this->shareManager->outgoingServer2ServerSharesAllowed()) {
-			throw new ShareNotFound();
-		}
-		$share = $this->shareManager->getShareById('ocFederatedSharing:' . $id, $this->currentUser);
-
-		return $share;
-	}
-
-	/**
-	 * Lock a Node
-	 *
-	 * @param \OCP\Files\Node $node
-	 * @throws LockedException
-	 */
-	private function lock(\OCP\Files\Node $node) {
-		$node->lock(ILockingProvider::LOCK_SHARED);
-		$this->lockedNode = $node;
-	}
-
-	/**
-	 * Cleanup the remaining locks
-	 * @throws @LockedException
-	 */
-	public function cleanup() {
-		if ($this->lockedNode !== null) {
-			$this->lockedNode->unlock(ILockingProvider::LOCK_SHARED);
-		}
-	}
-
-	/**
-	 * Returns the helper of ShareAPIController for room shares.
-	 *
-	 * If the Talk application is not enabled or the helper is not available
-	 * a QueryException is thrown instead.
-	 *
-	 * @return \OCA\Talk\Share\Helper\ShareAPIController
-	 * @throws QueryException
-	 */
-	private function getRoomShareHelper() {
-		if (!$this->appManager->isEnabledForUser('spreed')) {
-			throw new QueryException();
-		}
-
-		return $this->serverContainer->query('\OCA\Talk\Share\Helper\ShareAPIController');
-	}
-
-
-	/**
-	 * @param string $viewer
-	 * @param Node $node
-	 * @param bool $reShares
-	 *
-	 * @return IShare[]
-	 */
-	private function getSharesFromNode(string $viewer, $node, bool $reShares): array {
-
-		$providers = [
-			Share::SHARE_TYPE_USER,
-			Share::SHARE_TYPE_GROUP,
-			Share::SHARE_TYPE_LINK,
-			Share::SHARE_TYPE_EMAIL,
-			Share::SHARE_TYPE_EMAIL,
-			Share::SHARE_TYPE_CIRCLE,
-			Share::SHARE_TYPE_ROOM
-		];
-
-		// Should we assume that the (currentUser) viewer is the owner of the node !?
-		$shares = [];
-		foreach ($providers as $provider) {
-			if (!$this->shareManager->shareProviderExists($provider)) {
-				continue;
-			}
-
-			$providerShares =
-				$this->shareManager->getSharesBy($viewer, $provider, $node, $reShares, -1, 0);
-			$shares = array_merge($shares, $providerShares);
-		}
-
-		if ($this->shareManager->outgoingServer2ServerSharesAllowed()) {
-			$federatedShares = $this->shareManager->getSharesBy(
-				$this->currentUser, Share::SHARE_TYPE_REMOTE, $node, $reShares, -1, 0
-			);
-			$shares = array_merge($shares, $federatedShares);
-		}
-
-		if ($this->shareManager->outgoingServer2ServerGroupSharesAllowed()) {
-			$federatedShares = $this->shareManager->getSharesBy(
-				$this->currentUser, Share::SHARE_TYPE_REMOTE_GROUP, $node, $reShares, -1, 0
-			);
-			$shares = array_merge($shares, $federatedShares);
-		}
-
-		return $shares;
-	}
-
-
-	/**
-	 * @param Node $node
-	 *
-	 * @throws SharingRightsException
-	 */
-	private function confirmSharingRights(Node $node): void {
-		if (!$this->hasResharingRights($this->currentUser, $node)) {
-			throw new SharingRightsException('no sharing rights on this item');
-		}
-	}
-
-
-	/**
-	 * @param string $viewer
-	 * @param Node $node
-	 *
-	 * @return bool
-	 */
-	private function hasResharingRights($viewer, $node): bool {
-		if ($viewer === $node->getOwner()->getUID()) {
-			return true;
-		}
-
-		foreach ([$node, $node->getParent()] as $node) {
-			$shares = $this->getSharesFromNode($viewer, $node, true);
-			foreach ($shares as $share) {
-				try {
-					if ($this->shareProviderResharingRights($viewer, $share, $node)) {
-						return true;
-					}
-				} catch (InvalidPathException | NotFoundException $e) {
-				}
-			}
-		}
-
-		return false;
-	}
-
-
-	/**
-	 * Returns if we can find resharing rights in an IShare object for a specific user.
-	 *
-	 * @suppress PhanUndeclaredClassMethod
-	 *
-	 * @param string $userId
-	 * @param IShare $share
-	 * @param Node $node
-	 *
-	 * @return bool
-	 * @throws NotFoundException
-	 * @throws InvalidPathException
-	 */
-	private function shareProviderResharingRights(string $userId, IShare $share, $node): bool {
-		if ($share->getShareOwner() === $userId) {
-			return true;
-		}
-
-		// we check that current user have parent resharing rights on the current file
-		if ($node !== null && ($node->getPermissions() & Constants::PERMISSION_SHARE) !== 0) {
-			return true;
-		}
-
-		if ((\OCP\Constants::PERMISSION_SHARE & $share->getPermissions()) === 0) {
-			return false;
-		}
-
-		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER && $share->getSharedWith() === $userId) {
-			return true;
-		}
-
-		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP && $this->groupManager->isInGroup($userId, $share->getSharedWith())) {
-			return true;
-		}
-
-		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_CIRCLE && \OC::$server->getAppManager()->isEnabledForUser('circles')
-			&& class_exists('\OCA\Circles\Api\v1\Circles')) {
-
-			$hasCircleId = (substr($share->getSharedWith(), -1) === ']');
-			$shareWithStart = ($hasCircleId ? strrpos($share->getSharedWith(), '[') + 1 : 0);
-			$shareWithLength = ($hasCircleId ? -1 : strpos($share->getSharedWith(), ' '));
-			if (is_bool($shareWithLength)) {
-				$shareWithLength = -1;
-			}
-			$sharedWith = substr($share->getSharedWith(), $shareWithStart, $shareWithLength);
-			try {
-				$member = \OCA\Circles\Api\v1\Circles::getMember($sharedWith, $userId, 1);
-				if ($member->getLevel() >= 4) {
-					return true;
-				}
-				return false;
-			} catch (QueryException $e) {
-				return false;
-			}
-		}
-
-		return false;
-	}
-
-	/**
-	 * Get all the shares for the current user
-	 *
-	 * @param Node|null $path
-	 * @param boolean $reshares
-	 * @return void
-	 */
-	private function getAllShares(?Node $path = null, bool $reshares = false) {
-		// Get all shares
-		$userShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_USER, $path, $reshares, -1, 0);
-		$groupShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_GROUP, $path, $reshares, -1, 0);
-		$linkShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_LINK, $path, $reshares, -1, 0);
-
-		// EMAIL SHARES
-		$mailShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_EMAIL, $path, $reshares, -1, 0);
-
-		// CIRCLE SHARES
-		$circleShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_CIRCLE, $path, $reshares, -1, 0);
-
-		// TALK SHARES
-		$roomShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_ROOM, $path, $reshares, -1, 0);
-
-		// FEDERATION
-		if ($this->shareManager->outgoingServer2ServerSharesAllowed()) {
-			$federatedShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_REMOTE, $path, $reshares, -1, 0);
-		} else {
-			$federatedShares = [];
-		}
-		if ($this->shareManager->outgoingServer2ServerGroupSharesAllowed()) {
-			$federatedGroupShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_REMOTE_GROUP, $path, $reshares, -1, 0);
-		} else {
-			$federatedGroupShares = [];
-		}
-
-		return array_merge($userShares, $groupShares, $linkShares, $mailShares, $circleShares, $roomShares, $federatedShares, $federatedGroupShares);
-	}
-
-
-	/**
-	 * merging already formatted shares.
-	 * We'll make an associative array to easily detect duplicate Ids.
-	 * Keys _needs_ to be removed after all shares are retrieved and merged.
-	 *
-	 * @param array $shares
-	 * @param array $newShares
-	 */
-	private function mergeFormattedShares(array &$shares, array $newShares) {
-		foreach ($newShares as $newShare) {
-			if (!array_key_exists($newShare['id'], $shares)) {
-				$shares[$newShare['id']] = $newShare;
-			}
-		}
-	}
+                continue;
+            }
+
+            if (in_array($share->getId(), $known) || $share->getSharedWith() === $this->currentUser) {
+                continue;
+            }
+
+            $known[] = $share->getId();
+            try {
+                /** @var IShare $share */
+                $format = $this->formatShare($share, $node);
+                $formatted[] = $format;
+
+                // let's also build a list of shares created
+                // by the current user only, in case
+                // there is no resharing rights
+                if ($share->getSharedBy() === $this->currentUser) {
+                    $miniFormatted[] = $format;
+                }
+
+                // check if one of those share is shared with me
+                // and if I have resharing rights on it
+                if (!$resharingRight && $this->shareProviderResharingRights($this->currentUser, $share, $node)) {
+                    $resharingRight = true;
+                }
+            } catch (InvalidPathException | NotFoundException $e) {
+            }
+        }
+
+        if (!$resharingRight) {
+            $formatted = $miniFormatted;
+        }
+
+        if ($includeTags) {
+            $formatted =
+                Helper::populateTags($formatted, 'file_source', \OC::$server->getTagManager());
+        }
+
+        return $formatted;
+    }
+
+
+    /**
+     * The getInheritedShares function.
+     * returns all shares relative to a file, including parent folders shares rights.
+     *
+     * @NoAdminRequired
+     *
+     * @param string $path
+     *
+     * - 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 DataResponse
+     * @throws InvalidPathException
+     * @throws NotFoundException
+     * @throws OCSNotFoundException
+     * @throws OCSBadRequestException
+     * @throws SharingRightsException
+     */
+    public function getInheritedShares(string $path): DataResponse {
+
+        // get Node from (string) path.
+        $userFolder = $this->rootFolder->getUserFolder($this->currentUser);
+        try {
+            $node = $userFolder->get($path);
+            $this->lock($node);
+        } catch (\OCP\Files\NotFoundException $e) {
+            throw new OCSNotFoundException($this->l->t('Wrong path, file/folder doesn\'t exist'));
+        } catch (LockedException $e) {
+            throw new OCSNotFoundException($this->l->t('Could not lock path'));
+        }
+
+        // current User has resharing rights ?
+        $this->confirmSharingRights($node);
+
+        // initiate real owner.
+        $owner = $node->getOwner()
+                        ->getUID();
+        if (!$this->userManager->userExists($owner)) {
+            return new DataResponse([]);
+        }
+
+        // get node based on the owner, fix owner in case of external storage
+        $userFolder = $this->rootFolder->getUserFolder($owner);
+        if ($node->getId() !== $userFolder->getId() && !$userFolder->isSubNode($node)) {
+            $owner = $node->getOwner()
+                            ->getUID();
+            $userFolder = $this->rootFolder->getUserFolder($owner);
+            $nodes = $userFolder->getById($node->getId());
+            $node = array_shift($nodes);
+        }
+        $basePath = $userFolder->getPath();
+
+        // generate node list for each parent folders
+        /** @var Node[] $nodes */
+        $nodes = [];
+        while ($node->getPath() !== $basePath) {
+            $node = $node->getParent();
+            $nodes[] = $node;
+        }
+
+        // for each nodes, retrieve shares.
+        $shares = [];
+        foreach ($nodes as $node) {
+            $getShares = $this->getFormattedShares($owner, $node, false, true);
+            $this->mergeFormattedShares($shares, $getShares);
+        }
+
+        return new DataResponse(array_values($shares));
+    }
+
+
+    /**
+     * @NoAdminRequired
+     *
+     * @param string $id
+     * @param int $permissions
+     * @param string $password
+     * @param string $sendPasswordByTalk
+     * @param string $publicUpload
+     * @param string $expireDate
+     * @param string $note
+     * @param string $label
+     * @param string $hideDownload
+     * @return DataResponse
+     * @throws LockedException
+     * @throws NotFoundException
+     * @throws OCSBadRequestException
+     * @throws OCSForbiddenException
+     * @throws OCSNotFoundException
+     */
+    public function updateShare(
+        string $id,
+        int $permissions = null,
+        string $password = null,
+        string $sendPasswordByTalk = null,
+        string $publicUpload = null,
+        string $expireDate = null,
+        string $note = null,
+        string $label = null,
+        string $hideDownload = null
+    ): DataResponse {
+        try {
+            $share = $this->getShareById($id);
+        } catch (ShareNotFound $e) {
+            throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+        }
+
+        $this->lock($share->getNode());
+
+        if (!$this->canAccessShare($share, false)) {
+            throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+        }
+
+        if (!$this->canEditShare($share)) {
+            throw new OCSForbiddenException('You are not allowed to edit incoming shares');
+        }
+
+        if (
+            $permissions === null &&
+            $password === null &&
+            $sendPasswordByTalk === null &&
+            $publicUpload === null &&
+            $expireDate === null &&
+            $note === null &&
+            $label === null &&
+            $hideDownload === null
+        ) {
+            throw new OCSBadRequestException($this->l->t('Wrong or no update parameter given'));
+        }
+
+        if ($note !== null) {
+            $share->setNote($note);
+        }
+
+        /**
+         * expirationdate, password and publicUpload only make sense for link shares
+         */
+        if ($share->getShareType() === Share::SHARE_TYPE_LINK
+            || $share->getShareType() === Share::SHARE_TYPE_EMAIL) {
+
+            /**
+             * We do not allow editing link shares that the current user
+             * doesn't own. This is confusing and lead to errors when
+             * someone else edit a password or expiration date without
+             * the share owner knowing about it.
+             * We only allow deletion
+             */
+
+            if ($share->getSharedBy() !== $this->currentUser) {
+                throw new OCSForbiddenException('You are not allowed to edit link shares that you don\'t own');
+            }
+
+            // Update hide download state
+            if ($hideDownload === 'true') {
+                $share->setHideDownload(true);
+            } else if ($hideDownload === 'false') {
+                $share->setHideDownload(false);
+            }
+
+            $newPermissions = null;
+            if ($publicUpload === 'true') {
+                $newPermissions = Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE;
+            } else if ($publicUpload === 'false') {
+                $newPermissions = Constants::PERMISSION_READ;
+            }
+
+            if ($permissions !== null) {
+                $newPermissions = (int) $permissions;
+                $newPermissions = $newPermissions & ~Constants::PERMISSION_SHARE;
+            }
+
+            if ($newPermissions !== null &&
+                !in_array($newPermissions, [
+                    Constants::PERMISSION_READ,
+                    Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE, // legacy
+                    Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE, // correct
+                    Constants::PERMISSION_CREATE, // hidden file list
+                    Constants::PERMISSION_READ | Constants::PERMISSION_UPDATE, // allow to edit single files
+                ], true)
+            ) {
+                throw new OCSBadRequestException($this->l->t('Can\'t change permissions for public share links'));
+            }
+
+            if (
+                // legacy
+                $newPermissions === (Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE) ||
+                // correct
+                $newPermissions === (Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE)
+            ) {
+                if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
+                    throw new OCSForbiddenException($this->l->t('Public upload disabled by the administrator'));
+                }
+
+                if (!($share->getNode() instanceof \OCP\Files\Folder)) {
+                    throw new OCSBadRequestException($this->l->t('Public upload is only possible for publicly shared folders'));
+                }
+
+                // normalize to correct public upload permissions
+                $newPermissions = Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE;
+            }
+
+            if ($newPermissions !== null) {
+                $share->setPermissions($newPermissions);
+                $permissions = $newPermissions;
+            }
+
+            if ($expireDate === '') {
+                $share->setExpirationDate(null);
+            } else if ($expireDate !== null) {
+                try {
+                    $expireDate = $this->parseDate($expireDate);
+                } catch (\Exception $e) {
+                    throw new OCSBadRequestException($e->getMessage(), $e);
+                }
+                $share->setExpirationDate($expireDate);
+            }
+
+            if ($password === '') {
+                $share->setPassword(null);
+            } else if ($password !== null) {
+                $share->setPassword($password);
+            }
+
+            // only link shares have labels
+            if ($share->getShareType() === Share::SHARE_TYPE_LINK && $label !== null) {
+                $share->setLabel($label);
+            }
+
+            if ($sendPasswordByTalk === 'true') {
+                if (!$this->appManager->isEnabledForUser('spreed')) {
+                    throw new OCSForbiddenException($this->l->t('Sharing sending the password by Nextcloud Talk failed because Nextcloud Talk is not enabled'));
+                }
+
+                $share->setSendPasswordByTalk(true);
+            } else if ($sendPasswordByTalk !== null) {
+                $share->setSendPasswordByTalk(false);
+            }
+        }
+
+        // NOT A LINK SHARE
+        else {
+            if ($permissions !== null) {
+                $permissions = (int) $permissions;
+                $share->setPermissions($permissions);
+            }
+
+            if ($expireDate === '') {
+                $share->setExpirationDate(null);
+            } else if ($expireDate !== null) {
+                try {
+                    $expireDate = $this->parseDate($expireDate);
+                } catch (\Exception $e) {
+                    throw new OCSBadRequestException($e->getMessage(), $e);
+                }
+                $share->setExpirationDate($expireDate);
+            }
+        }
+
+        try {
+            $share = $this->shareManager->updateShare($share);
+        } catch (GenericShareException $e) {
+            $code = $e->getCode() === 0 ? 403 : $e->getCode();
+            throw new OCSException($e->getHint(), $code);
+        } catch (\Exception $e) {
+            throw new OCSBadRequestException($e->getMessage(), $e);
+        }
+
+        return new DataResponse($this->formatShare($share));
+    }
+
+    /**
+     * @NoAdminRequired
+     */
+    public function pendingShares(): DataResponse {
+        $pendingShares = [];
+
+        $shareTypes = [
+            IShare::TYPE_USER,
+            IShare::TYPE_GROUP
+        ];
+
+        foreach ($shareTypes as $shareType) {
+            $shares = $this->shareManager->getSharedWith($this->currentUser, $shareType, null, -1, 0);
+
+            foreach ($shares as $share) {
+                if ($share->getStatus() === IShare::STATUS_PENDING || $share->getStatus() === IShare::STATUS_REJECTED) {
+                    $pendingShares[] = $share;
+                }
+            }
+        }
+
+        $result = array_filter(array_map(function (IShare $share) {
+            $userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
+            $nodes = $userFolder->getById($share->getNodeId());
+            if (empty($nodes)) {
+                // fallback to guessing the path
+                $node = $userFolder->get($share->getTarget());
+                if ($node === null || $share->getTarget() === '') {
+                    return null;
+                }
+            } else {
+                $node = $nodes[0];
+            }
+
+            try {
+                $formattedShare = $this->formatShare($share, $node);
+                $formattedShare['status'] = $share->getStatus();
+                $formattedShare['path'] = $share->getNode()->getName();
+                $formattedShare['permissions'] = 0;
+                return $formattedShare;
+            } catch (NotFoundException $e) {
+                return null;
+            }
+        }, $pendingShares), function ($entry) {
+            return $entry !== null;
+        });
+
+        return new DataResponse($result);
+    }
+
+    /**
+     * @NoAdminRequired
+     *
+     * @param string $id
+     * @return DataResponse
+     * @throws OCSNotFoundException
+     * @throws OCSException
+     * @throws OCSBadRequestException
+     */
+    public function acceptShare(string $id): DataResponse {
+        try {
+            $share = $this->getShareById($id);
+        } catch (ShareNotFound $e) {
+            throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+        }
+
+        if (!$this->canAccessShare($share)) {
+            throw new OCSNotFoundException($this->l->t('Wrong share ID, share doesn\'t exist'));
+        }
+
+        try {
+            $this->shareManager->acceptShare($share, $this->currentUser);
+        } catch (GenericShareException $e) {
+            $code = $e->getCode() === 0 ? 403 : $e->getCode();
+            throw new OCSException($e->getHint(), $code);
+        } catch (\Exception $e) {
+            throw new OCSBadRequestException($e->getMessage(), $e);
+        }
+
+        return new DataResponse();
+    }
+
+    /**
+     * Does the user have read permission on the share
+     *
+     * @param \OCP\Share\IShare $share the share to check
+     * @param boolean $checkGroups check groups as well?
+     * @return boolean
+     * @throws NotFoundException
+     *
+     * @suppress PhanUndeclaredClassMethod
+     */
+    protected function canAccessShare(\OCP\Share\IShare $share, bool $checkGroups = true): bool {
+        // A file with permissions 0 can't be accessed by us. So Don't show it
+        if ($share->getPermissions() === 0) {
+            return false;
+        }
+
+        // Owner of the file and the sharer of the file can always get share
+        if ($share->getShareOwner() === $this->currentUser
+            || $share->getSharedBy() === $this->currentUser) {
+            return true;
+        }
+
+        // If the share is shared with you, you can access it!
+        if ($share->getShareType() === Share::SHARE_TYPE_USER
+            && $share->getSharedWith() === $this->currentUser) {
+            return true;
+        }
+
+        // Have reshare rights on the shared file/folder ?
+        // Does the currentUser have access to the shared file?
+        $userFolder = $this->rootFolder->getUserFolder($this->currentUser);
+        $files = $userFolder->getById($share->getNodeId());
+        if (!empty($files) && $this->shareProviderResharingRights($this->currentUser, $share, $files[0])) {
+            return true;
+        }
+
+        // If in the recipient group, you can see the share
+        if ($checkGroups && $share->getShareType() === Share::SHARE_TYPE_GROUP) {
+            $sharedWith = $this->groupManager->get($share->getSharedWith());
+            $user = $this->userManager->get($this->currentUser);
+            if ($user !== null && $sharedWith !== null && $sharedWith->inGroup($user)) {
+                return true;
+            }
+        }
+
+        if ($share->getShareType() === Share::SHARE_TYPE_CIRCLE) {
+            // TODO: have a sanity check like above?
+            return true;
+        }
+
+        if ($share->getShareType() === Share::SHARE_TYPE_ROOM) {
+            try {
+                return $this->getRoomShareHelper()->canAccessShare($share, $this->currentUser);
+            } catch (QueryException $e) {
+                return false;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Does the user have edit permission on the share
+     *
+     * @param \OCP\Share\IShare $share the share to check
+     * @return boolean
+     */
+    protected function canEditShare(\OCP\Share\IShare $share): bool {
+        // A file with permissions 0 can't be accessed by us. So Don't show it
+        if ($share->getPermissions() === 0) {
+            return false;
+        }
+
+        // The owner of the file and the creator of the share
+        // can always edit the share
+        if ($share->getShareOwner() === $this->currentUser ||
+            $share->getSharedBy() === $this->currentUser
+        ) {
+            return true;
+        }
+
+        //! we do NOT support some kind of `admin` in groups.
+        //! You cannot edit shares shared to a group you're
+        //! a member of if you're not the share owner or the file owner!
+
+        return false;
+    }
+
+    /**
+     * Does the user have delete permission on the share
+     *
+     * @param \OCP\Share\IShare $share the share to check
+     * @return boolean
+     */
+    protected function canDeleteShare(\OCP\Share\IShare $share): bool {
+        // A file with permissions 0 can't be accessed by us. So Don't show it
+        if ($share->getPermissions() === 0) {
+            return false;
+        }
+
+        // if the user is the recipient, i can unshare
+        // the share with self
+        if ($share->getShareType() === Share::SHARE_TYPE_USER &&
+            $share->getSharedWith() === $this->currentUser
+        ) {
+            return true;
+        }
+
+        // The owner of the file and the creator of the share
+        // can always delete the share
+        if ($share->getShareOwner() === $this->currentUser ||
+            $share->getSharedBy() === $this->currentUser
+        ) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Does the user have delete permission on the share
+     * This differs from the canDeleteShare function as it only
+     * remove the share for the current user. It does NOT
+     * completely delete the share but only the mount point.
+     * It can then be restored from the deleted shares section.
+     *
+     * @param \OCP\Share\IShare $share the share to check
+     * @return boolean
+     *
+     * @suppress PhanUndeclaredClassMethod
+     */
+    protected function canDeleteShareFromSelf(\OCP\Share\IShare $share): bool {
+        if ($share->getShareType() !== IShare::TYPE_GROUP &&
+            $share->getShareType() !== IShare::TYPE_ROOM
+        ) {
+            return false;
+        }
+
+        if ($share->getShareOwner() === $this->currentUser ||
+            $share->getSharedBy() === $this->currentUser
+        ) {
+            // Delete the whole share, not just for self
+            return false;
+        }
+
+        // If in the recipient group, you can delete the share from self
+        if ($share->getShareType() === Share::SHARE_TYPE_GROUP) {
+            $sharedWith = $this->groupManager->get($share->getSharedWith());
+            $user = $this->userManager->get($this->currentUser);
+            if ($user !== null && $sharedWith !== null && $sharedWith->inGroup($user)) {
+                return true;
+            }
+        }
+
+        if ($share->getShareType() === Share::SHARE_TYPE_ROOM) {
+            try {
+                return $this->getRoomShareHelper()->canAccessShare($share, $this->currentUser);
+            } catch (QueryException $e) {
+                return false;
+            }
+        }
+
+        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(string $expireDate): \DateTime {
+        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(string $id): IShare {
+        $share = null;
+
+        // First check if it is an internal share.
+        try {
+            $share = $this->shareManager->getShareById('ocinternal:' . $id, $this->currentUser);
+            return $share;
+        } catch (ShareNotFound $e) {
+            // Do nothing, just try the other share type
+        }
+
+
+        try {
+            if ($this->shareManager->shareProviderExists(Share::SHARE_TYPE_CIRCLE)) {
+                $share = $this->shareManager->getShareById('ocCircleShare:' . $id, $this->currentUser);
+                return $share;
+            }
+        } catch (ShareNotFound $e) {
+            // Do nothing, just try the other share type
+        }
+
+        try {
+            if ($this->shareManager->shareProviderExists(Share::SHARE_TYPE_EMAIL)) {
+                $share = $this->shareManager->getShareById('ocMailShare:' . $id, $this->currentUser);
+                return $share;
+            }
+        } catch (ShareNotFound $e) {
+            // Do nothing, just try the other share type
+        }
+
+        try {
+            $share = $this->shareManager->getShareById('ocRoomShare:' . $id, $this->currentUser);
+            return $share;
+        } catch (ShareNotFound $e) {
+            // Do nothing, just try the other share type
+        }
+
+        if (!$this->shareManager->outgoingServer2ServerSharesAllowed()) {
+            throw new ShareNotFound();
+        }
+        $share = $this->shareManager->getShareById('ocFederatedSharing:' . $id, $this->currentUser);
+
+        return $share;
+    }
+
+    /**
+     * Lock a Node
+     *
+     * @param \OCP\Files\Node $node
+     * @throws LockedException
+     */
+    private function lock(\OCP\Files\Node $node) {
+        $node->lock(ILockingProvider::LOCK_SHARED);
+        $this->lockedNode = $node;
+    }
+
+    /**
+     * Cleanup the remaining locks
+     * @throws @LockedException
+     */
+    public function cleanup() {
+        if ($this->lockedNode !== null) {
+            $this->lockedNode->unlock(ILockingProvider::LOCK_SHARED);
+        }
+    }
+
+    /**
+     * Returns the helper of ShareAPIController for room shares.
+     *
+     * If the Talk application is not enabled or the helper is not available
+     * a QueryException is thrown instead.
+     *
+     * @return \OCA\Talk\Share\Helper\ShareAPIController
+     * @throws QueryException
+     */
+    private function getRoomShareHelper() {
+        if (!$this->appManager->isEnabledForUser('spreed')) {
+            throw new QueryException();
+        }
+
+        return $this->serverContainer->query('\OCA\Talk\Share\Helper\ShareAPIController');
+    }
+
+
+    /**
+     * @param string $viewer
+     * @param Node $node
+     * @param bool $reShares
+     *
+     * @return IShare[]
+     */
+    private function getSharesFromNode(string $viewer, $node, bool $reShares): array {
+
+        $providers = [
+            Share::SHARE_TYPE_USER,
+            Share::SHARE_TYPE_GROUP,
+            Share::SHARE_TYPE_LINK,
+            Share::SHARE_TYPE_EMAIL,
+            Share::SHARE_TYPE_EMAIL,
+            Share::SHARE_TYPE_CIRCLE,
+            Share::SHARE_TYPE_ROOM
+        ];
+
+        // Should we assume that the (currentUser) viewer is the owner of the node !?
+        $shares = [];
+        foreach ($providers as $provider) {
+            if (!$this->shareManager->shareProviderExists($provider)) {
+                continue;
+            }
+
+            $providerShares =
+                $this->shareManager->getSharesBy($viewer, $provider, $node, $reShares, -1, 0);
+            $shares = array_merge($shares, $providerShares);
+        }
+
+        if ($this->shareManager->outgoingServer2ServerSharesAllowed()) {
+            $federatedShares = $this->shareManager->getSharesBy(
+                $this->currentUser, Share::SHARE_TYPE_REMOTE, $node, $reShares, -1, 0
+            );
+            $shares = array_merge($shares, $federatedShares);
+        }
+
+        if ($this->shareManager->outgoingServer2ServerGroupSharesAllowed()) {
+            $federatedShares = $this->shareManager->getSharesBy(
+                $this->currentUser, Share::SHARE_TYPE_REMOTE_GROUP, $node, $reShares, -1, 0
+            );
+            $shares = array_merge($shares, $federatedShares);
+        }
+
+        return $shares;
+    }
+
+
+    /**
+     * @param Node $node
+     *
+     * @throws SharingRightsException
+     */
+    private function confirmSharingRights(Node $node): void {
+        if (!$this->hasResharingRights($this->currentUser, $node)) {
+            throw new SharingRightsException('no sharing rights on this item');
+        }
+    }
+
+
+    /**
+     * @param string $viewer
+     * @param Node $node
+     *
+     * @return bool
+     */
+    private function hasResharingRights($viewer, $node): bool {
+        if ($viewer === $node->getOwner()->getUID()) {
+            return true;
+        }
+
+        foreach ([$node, $node->getParent()] as $node) {
+            $shares = $this->getSharesFromNode($viewer, $node, true);
+            foreach ($shares as $share) {
+                try {
+                    if ($this->shareProviderResharingRights($viewer, $share, $node)) {
+                        return true;
+                    }
+                } catch (InvalidPathException | NotFoundException $e) {
+                }
+            }
+        }
+
+        return false;
+    }
+
+
+    /**
+     * Returns if we can find resharing rights in an IShare object for a specific user.
+     *
+     * @suppress PhanUndeclaredClassMethod
+     *
+     * @param string $userId
+     * @param IShare $share
+     * @param Node $node
+     *
+     * @return bool
+     * @throws NotFoundException
+     * @throws InvalidPathException
+     */
+    private function shareProviderResharingRights(string $userId, IShare $share, $node): bool {
+        if ($share->getShareOwner() === $userId) {
+            return true;
+        }
+
+        // we check that current user have parent resharing rights on the current file
+        if ($node !== null && ($node->getPermissions() & Constants::PERMISSION_SHARE) !== 0) {
+            return true;
+        }
+
+        if ((\OCP\Constants::PERMISSION_SHARE & $share->getPermissions()) === 0) {
+            return false;
+        }
+
+        if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER && $share->getSharedWith() === $userId) {
+            return true;
+        }
+
+        if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP && $this->groupManager->isInGroup($userId, $share->getSharedWith())) {
+            return true;
+        }
+
+        if ($share->getShareType() === \OCP\Share::SHARE_TYPE_CIRCLE && \OC::$server->getAppManager()->isEnabledForUser('circles')
+            && class_exists('\OCA\Circles\Api\v1\Circles')) {
+
+            $hasCircleId = (substr($share->getSharedWith(), -1) === ']');
+            $shareWithStart = ($hasCircleId ? strrpos($share->getSharedWith(), '[') + 1 : 0);
+            $shareWithLength = ($hasCircleId ? -1 : strpos($share->getSharedWith(), ' '));
+            if (is_bool($shareWithLength)) {
+                $shareWithLength = -1;
+            }
+            $sharedWith = substr($share->getSharedWith(), $shareWithStart, $shareWithLength);
+            try {
+                $member = \OCA\Circles\Api\v1\Circles::getMember($sharedWith, $userId, 1);
+                if ($member->getLevel() >= 4) {
+                    return true;
+                }
+                return false;
+            } catch (QueryException $e) {
+                return false;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Get all the shares for the current user
+     *
+     * @param Node|null $path
+     * @param boolean $reshares
+     * @return void
+     */
+    private function getAllShares(?Node $path = null, bool $reshares = false) {
+        // Get all shares
+        $userShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_USER, $path, $reshares, -1, 0);
+        $groupShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_GROUP, $path, $reshares, -1, 0);
+        $linkShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_LINK, $path, $reshares, -1, 0);
+
+        // EMAIL SHARES
+        $mailShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_EMAIL, $path, $reshares, -1, 0);
+
+        // CIRCLE SHARES
+        $circleShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_CIRCLE, $path, $reshares, -1, 0);
+
+        // TALK SHARES
+        $roomShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_ROOM, $path, $reshares, -1, 0);
+
+        // FEDERATION
+        if ($this->shareManager->outgoingServer2ServerSharesAllowed()) {
+            $federatedShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_REMOTE, $path, $reshares, -1, 0);
+        } else {
+            $federatedShares = [];
+        }
+        if ($this->shareManager->outgoingServer2ServerGroupSharesAllowed()) {
+            $federatedGroupShares = $this->shareManager->getSharesBy($this->currentUser, Share::SHARE_TYPE_REMOTE_GROUP, $path, $reshares, -1, 0);
+        } else {
+            $federatedGroupShares = [];
+        }
+
+        return array_merge($userShares, $groupShares, $linkShares, $mailShares, $circleShares, $roomShares, $federatedShares, $federatedGroupShares);
+    }
+
+
+    /**
+     * merging already formatted shares.
+     * We'll make an associative array to easily detect duplicate Ids.
+     * Keys _needs_ to be removed after all shares are retrieved and merged.
+     *
+     * @param array $shares
+     * @param array $newShares
+     */
+    private function mergeFormattedShares(array &$shares, array $newShares) {
+        foreach ($newShares as $newShare) {
+            if (!array_key_exists($newShare['id'], $shares)) {
+                $shares[$newShare['id']] = $newShare;
+            }
+        }
+    }
 
 }