/**
* Delete a share
*
* @param IShare $share
*/
public function delete(IShare $share)
{
$qb = $this->dbConnection->getQueryBuilder();
$qb->delete('share')->where($qb->expr()->eq('id', $qb->createNamedParameter($share->getId())));
$qb->execute();
list(, $remote) = $this->addressHandler->splitUserRemote($share->getSharedWith());
$this->notifications->sendRemoteUnShare($remote, $share->getId(), $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 string $recipient UserId of recipient
* @throws BackendError
* @throws ProviderException
*/
public function deleteFromSelf(\OCP\Share\IShare $share, $recipient)
{
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
$group = $this->groupManager->get($share->getSharedWith());
$user = $this->userManager->get($recipient);
if (!$group->inGroup($user)) {
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)))->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), 'uid_owner' => $qb->createNamedParameter($share->getShareOwner()), 'uid_initiator' => $qb->createNamedParameter($share->getSharedBy()), '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');
}
}
}
/**
* @inheritdoc
*/
public function moveShare(\OCP\Share\IShare $share, $recipientId)
{
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
throw new \InvalidArgumentException('Can\'t change target of link share');
}
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER && $share->getSharedWith() !== $recipientId) {
throw new \InvalidArgumentException('Invalid recipient');
}
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
$sharedWith = $this->groupManager->get($share->getSharedWith());
$recipient = $this->userManager->get($recipientId);
if (!$sharedWith->inGroup($recipient)) {
throw new \InvalidArgumentException('Invalid recipient');
}
}
list($providerId, ) = $this->splitFullId($share->getId());
$provider = $this->factory->getProvider($providerId);
$provider->move($share, $recipientId);
}
/**
* @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;
}
/**
* Delete a share (owner unShares the file)
*
* @param IShare $share
*/
public function delete(IShare $share)
{
list(, $remote) = $this->addressHandler->splitUserRemote($share->getSharedWith());
$isOwner = false;
// if the local user is the owner we can send the unShare request directly...
if ($this->userManager->userExists($share->getShareOwner())) {
$this->notifications->sendRemoteUnShare($remote, $share->getId(), $share->getToken());
$this->revokeShare($share, true);
$isOwner = true;
} else {
// ... if not we need to correct ID for the unShare request
$remoteId = $this->getRemoteId($share);
$this->notifications->sendRemoteUnShare($remote, $remoteId, $share->getToken());
$this->revokeShare($share, false);
}
// send revoke notification to the other user, if initiator and owner are not the same user
if ($share->getShareOwner() !== $share->getSharedBy()) {
$remoteId = $this->getRemoteId($share);
if ($isOwner) {
list(, $remote) = $this->addressHandler->splitUserRemote($share->getSharedBy());
} else {
list(, $remote) = $this->addressHandler->splitUserRemote($share->getShareOwner());
}
$this->notifications->sendRevokeShare($remote, $remoteId, $share->getToken());
}
$this->removeShareFromTable($share);
}
/**
* Check for pre share requirements for group shares
*
* @param \OCP\Share\IShare $share
* @throws \Exception
*/
protected function groupCreateChecks(\OCP\Share\IShare $share)
{
// Verify if the user can share with this group
if ($this->shareWithGroupMembersOnly()) {
if (!$share->getSharedWith()->inGroup($share->getSharedBy())) {
throw new \Exception('Only sharing within your own groups is allowed');
}
}
/*
* TODO: Could be costly, fix
*
* Also this is not what we want in the future.. then we want to squash identical shares.
*/
$provider = $this->factory->getProviderForType(\OCP\Share::SHARE_TYPE_GROUP);
$existingShares = $provider->getSharesByPath($share->getNode());
foreach ($existingShares as $existingShare) {
if ($existingShare->getFullId() === $share->getFullId()) {
continue;
}
if ($existingShare->getSharedWith() === $share->getSharedWith()) {
throw new \Exception('Path already shared with this group');
}
}
}
