/**
* @inheritdoc
*/
public function move(\OCP\Share\IShare $share, $recipient)
{
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER) {
// Just update the target
$qb = $this->dbConn->getQueryBuilder();
$qb->update('share')->set('file_target', $qb->createNamedParameter($share->getTarget()))->where($qb->expr()->eq('id', $qb->createNamedParameter($share->getId())))->execute();
} else {
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
// Check if there is a usergroup share
$qb = $this->dbConn->getQueryBuilder();
$stmt = $qb->select('id')->from('share')->where($qb->expr()->eq('share_type', $qb->createNamedParameter(self::SHARE_TYPE_USERGROUP)))->andWhere($qb->expr()->eq('share_with', $qb->createNamedParameter($recipient)))->andWhere($qb->expr()->eq('parent', $qb->createNamedParameter($share->getId())))->setMaxResults(1)->execute();
$data = $stmt->fetch();
$stmt->closeCursor();
if ($data === false) {
// No usergroup share yet. Create one.
$qb = $this->dbConn->getQueryBuilder();
$qb->insert('share')->values(['share_type' => $qb->createNamedParameter(self::SHARE_TYPE_USERGROUP), 'share_with' => $qb->createNamedParameter($recipient), 'uid_owner' => $qb->createNamedParameter($share->getShareOwner()), 'uid_initiator' => $qb->createNamedParameter($share->getSharedBy()), 'parent' => $qb->createNamedParameter($share->getId()), 'item_type' => $qb->createNamedParameter($share->getNode() instanceof File ? 'file' : 'folder'), 'item_source' => $qb->createNamedParameter($share->getNode()->getId()), 'file_source' => $qb->createNamedParameter($share->getNode()->getId()), 'file_target' => $qb->createNamedParameter($share->getTarget()), 'permissions' => $qb->createNamedParameter($share->getPermissions()), 'stime' => $qb->createNamedParameter($share->getShareTime()->getTimestamp())])->execute();
} else {
// Already a usergroup share. Update it.
$qb = $this->dbConn->getQueryBuilder();
$qb->update('share')->set('file_target', $qb->createNamedParameter($share->getTarget()))->where($qb->expr()->eq('id', $qb->createNamedParameter($data['id'])))->execute();
}
}
}
return $share;
}
/**
* Update a share
*
* @param IShare $share
* @return IShare The share object
*/
public function update(IShare $share)
{
/*
* We allow updating the permissions of federated shares
*/
$qb = $this->dbConnection->getQueryBuilder();
$qb->update('share')->where($qb->expr()->eq('id', $qb->createNamedParameter($share->getId())))->set('permissions', $qb->createNamedParameter($share->getPermissions()))->set('uid_owner', $qb->createNamedParameter($share->getShareOwner()))->set('uid_initiator', $qb->createNamedParameter($share->getSharedBy()))->execute();
return $share;
}
/**
* Check if the user that is sharing can actually share
*
* @param \OCP\Share\IShare $share
* @throws \Exception
*/
protected function canShare(\OCP\Share\IShare $share)
{
if (!$this->shareApiEnabled()) {
throw new \Exception('The share API is disabled');
}
if ($this->sharingDisabledForUser($share->getSharedBy())) {
throw new \Exception('You are not allowed to share');
}
}
/**
* Check if the user that is sharing can actually share
*
* @param \OCP\Share\IShare $share
* @return bool
*/
protected function canShare(\OCP\Share\IShare $share)
{
if (!$this->shareApiEnabled()) {
return false;
}
if ($this->sharingDisabledForUser($share->getSharedBy())) {
return false;
}
return true;
}
/**
* throws hooks when a share is attempted to be accessed
*
* @param \OCP\Share\IShare|string $share the Share instance if available,
* otherwise token
* @param int $errorCode
* @param string $errorMessage
* @throws OC\HintException
* @throws OC\ServerNotAvailableException
*/
protected function emitAccessShareHook($share, $errorCode = 200, $errorMessage = '')
{
$itemType = $itemSource = $uidOwner = '';
$token = $share;
$exception = null;
if ($share instanceof \OCP\Share\IShare) {
try {
$token = $share->getToken();
$uidOwner = $share->getSharedBy();
$itemType = $share->getNodeType();
$itemSource = $share->getNodeId();
} catch (\Exception $e) {
// we log what we know and pass on the exception afterwards
$exception = $e;
}
}
\OC_Hook::emit('OCP\\Share', 'share_link_access', ['itemType' => $itemType, 'itemSource' => $itemSource, 'uidOwner' => $uidOwner, 'token' => $token, 'errorCode' => $errorCode, 'errorMessage' => $errorMessage]);
if (!is_null($exception)) {
throw $exception;
}
}
/**
* @param \OCP\Share\IShare $share
* @return bool
*/
protected function canAccessShare(\OCP\Share\IShare $share)
{
// A file with permissions 0 can't be accessed by us. So Don't show it
if ($share->getPermissions() === 0) {
return false;
}
// Owner of the file and the sharer of the file can always get share
if ($share->getShareOwner() === $this->currentUser->getUID() || $share->getSharedBy() === $this->currentUser->getUID()) {
return true;
}
// If the share is shared with you (or a group you are a member of)
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER && $share->getSharedWith() === $this->currentUser->getUID()) {
return true;
}
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
$sharedWith = $this->groupManager->get($share->getSharedWith());
if ($sharedWith->inGroup($this->currentUser)) {
return true;
}
}
return false;
}
/**
* in case of a re-share we need to send the other use (initiator or owner)
* a message that the file was unshared
*
* @param IShare $share
* @param bool $isOwner the user can either be the owner or the user who re-sahred it
* @throws ShareNotFound
* @throws \OC\HintException
*/
protected function revokeShare($share, $isOwner)
{
// also send a unShare request to the initiator, if this is a different user than the owner
if ($share->getShareOwner() !== $share->getSharedBy()) {
if ($isOwner) {
list(, $remote) = $this->addressHandler->splitUserRemote($share->getSharedBy());
} else {
list(, $remote) = $this->addressHandler->splitUserRemote($share->getShareOwner());
}
$remoteId = $this->getRemoteId($share);
$this->notifications->sendRevokeShare($remote, $remoteId, $share->getToken());
}
}
/**
* Unshare a share from the recipient. If this is a group share
* this means we need a special entry in the share db.
*
* @param \OCP\Share\IShare $share
* @param IUser $recipient
* @throws BackendError
* @throws ProviderException
*/
public function deleteFromSelf(\OCP\Share\IShare $share, IUser $recipient)
{
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
/** @var IGroup $group */
$group = $share->getSharedWith();
if (!$group->inGroup($recipient)) {
throw new ProviderException('Recipient not in receiving group');
}
// Try to fetch user specific share
$qb = $this->dbConn->getQueryBuilder();
$stmt = $qb->select('*')->from('share')->where($qb->expr()->eq('share_type', $qb->createNamedParameter(self::SHARE_TYPE_USERGROUP)))->andWhere($qb->expr()->eq('share_with', $qb->createNamedParameter($recipient->getUID())))->andWhere($qb->expr()->eq('parent', $qb->createNamedParameter($share->getId())))->execute();
$data = $stmt->fetch();
/*
* Check if there already is a user specific group share.
* If there is update it (if required).
*/
if ($data === false) {
$qb = $this->dbConn->getQueryBuilder();
$type = $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder';
//Insert new share
$qb->insert('share')->values(['share_type' => $qb->createNamedParameter(self::SHARE_TYPE_USERGROUP), 'share_with' => $qb->createNamedParameter($recipient->getUID()), 'uid_owner' => $qb->createNamedParameter($share->getShareOwner()->getUID()), 'uid_initiator' => $qb->createNamedParameter($share->getSharedBy()->getUID()), 'parent' => $qb->createNamedParameter($share->getId()), 'item_type' => $qb->createNamedParameter($type), 'item_source' => $qb->createNamedParameter($share->getNode()->getId()), 'file_source' => $qb->createNamedParameter($share->getNode()->getId()), 'file_target' => $qb->createNamedParameter($share->getTarget()), 'permissions' => $qb->createNamedParameter(0), 'stime' => $qb->createNamedParameter($share->getShareTime()->getTimestamp())])->execute();
} else {
if ($data['permissions'] !== 0) {
// Update existing usergroup share
$qb = $this->dbConn->getQueryBuilder();
$qb->update('share')->set('permissions', $qb->createNamedParameter(0))->where($qb->expr()->eq('id', $qb->createNamedParameter($data['id'])))->execute();
}
}
} else {
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER) {
if ($share->getSharedWith() !== $recipient) {
throw new ProviderException('Recipient does not match');
}
// We can just delete user and link shares
$this->delete($share);
} else {
throw new ProviderException('Invalid shareType');
}
}
}
/**
* check if we are the initiator or the owner of a re-share and return the correct UID
*
* @param Share\IShare $share
* @return string
*/
protected function getCorrectUid(Share\IShare $share)
{
if ($this->userManager->userExists($share->getShareOwner())) {
return $share->getShareOwner();
}
return $share->getSharedBy();
}