nextcloud/apps/sharebymail/lib/ShareByMailProvider.php

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<?php
/**
* @copyright Copyright (c) 2016 Bjoern Schiessle <bjoern@schiessle.org>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\ShareByMail;
use OC\HintException;
use OC\Share20\Exception\InvalidShare;
use OCP\Activity\IManager;
use OCP\Files\Folder;
use OCP\Files\IRootFolder;
use OCP\Files\Node;
use OCP\IDBConnection;
use OCP\IL10N;
use OCP\ILogger;
use OCP\IURLGenerator;
use OCP\IUser;
use OCP\IUserManager;
use OCP\Mail\IMailer;
use OCP\Security\ISecureRandom;
use OC\Share20\Share;
use OCP\Share\Exceptions\ShareNotFound;
use OCP\Share\IShare;
use OCP\Share\IShareProvider;
use OCP\Template;
/**
* Class ShareByMail
*
* @package OCA\ShareByMail
*/
class ShareByMailProvider implements IShareProvider {
/** @var IDBConnection */
private $dbConnection;
/** @var ILogger */
private $logger;
/** @var ISecureRandom */
private $secureRandom;
/** @var IUserManager */
private $userManager;
/** @var IRootFolder */
private $rootFolder;
/** @var IL10N */
private $l;
/** @var IMailer */
private $mailer;
/** @var IURLGenerator */
private $urlGenerator;
/** @var IManager */
private $activityManager;
/**
* Return the identifier of this provider.
*
* @return string Containing only [a-zA-Z0-9]
*/
public function identifier() {
return 'ocMailShare';
}
/**
* DefaultShareProvider constructor.
*
* @param IDBConnection $connection
* @param ISecureRandom $secureRandom
* @param IUserManager $userManager
* @param IRootFolder $rootFolder
* @param IL10N $l
* @param ILogger $logger
* @param IMailer $mailer
* @param IURLGenerator $urlGenerator
* @param IManager $activityManager
*/
public function __construct(
IDBConnection $connection,
ISecureRandom $secureRandom,
IUserManager $userManager,
IRootFolder $rootFolder,
IL10N $l,
ILogger $logger,
IMailer $mailer,
IURLGenerator $urlGenerator,
IManager $activityManager
) {
$this->dbConnection = $connection;
$this->secureRandom = $secureRandom;
$this->userManager = $userManager;
$this->rootFolder = $rootFolder;
$this->l = $l;
$this->logger = $logger;
$this->mailer = $mailer;
$this->urlGenerator = $urlGenerator;
$this->activityManager = $activityManager;
}
/**
* Share a path
*
* @param IShare $share
* @return IShare The share object
* @throws ShareNotFound
* @throws \Exception
*/
public function create(IShare $share) {
$shareWith = $share->getSharedWith();
/*
* Check if file is not already shared with the remote user
*/
$alreadyShared = $this->getSharedWith($shareWith, \OCP\Share::SHARE_TYPE_EMAIL, $share->getNode(), 1, 0);
if (!empty($alreadyShared)) {
$message = 'Sharing %s failed, this item is already shared with %s';
$message_t = $this->l->t('Sharing %s failed, this item is already shared with %s', array($share->getNode()->getName(), $shareWith));
$this->logger->debug(sprintf($message, $share->getNode()->getName(), $shareWith), ['app' => 'Federated File Sharing']);
throw new \Exception($message_t);
}
$shareId = $this->createMailShare($share);
$this->createActivity($share);
$data = $this->getRawShare($shareId);
return $this->createShareObject($data);
}
/**
* create activity if a file/folder was shared by mail
*
* @param IShare $share
*/
protected function createActivity(IShare $share) {
$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
$this->publishActivity(
Activity::SUBJECT_SHARED_EMAIL_SELF,
[$userFolder->getRelativePath($share->getNode()->getPath()), $share->getSharedWith()],
$share->getSharedBy(),
$share->getNode()->getId(),
$userFolder->getRelativePath($share->getNode()->getPath())
);
if ($share->getShareOwner() !== $share->getSharedBy()) {
$ownerFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
$fileId = $share->getNode()->getId();
$nodes = $ownerFolder->getById($fileId);
$ownerPath = $nodes[0]->getPath();
$this->publishActivity(
Activity::SUBJECT_SHARED_EMAIL_BY,
[$ownerFolder->getRelativePath($ownerPath), $share->getSharedWith(), $share->getSharedBy()],
$share->getShareOwner(),
$fileId,
$ownerFolder->getRelativePath($ownerPath)
);
}
}
/**
* publish activity if a file/folder was shared by mail
*
* @param $subject
* @param $parameters
* @param $affectedUser
* @param $fileId
* @param $filePath
*/
protected function publishActivity($subject, $parameters, $affectedUser, $fileId, $filePath) {
$event = $this->activityManager->generateEvent();
$event->setApp('sharebymail')
->setType('shared')
->setSubject($subject, $parameters)
->setAffectedUser($affectedUser)
->setObject('files', $fileId, $filePath);
$this->activityManager->publish($event);
}
/**
* @param IShare $share
* @return int
* @throws \Exception
*/
protected function createMailShare(IShare $share) {
$share->setToken($this->generateToken());
$shareId = $this->addShareToDB(
$share->getNodeId(),
$share->getNodeType(),
$share->getSharedWith(),
$share->getSharedBy(),
$share->getShareOwner(),
$share->getPermissions(),
$share->getToken()
);
try {
$link = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.showShare',
['token' => $share->getToken()]);
$this->sendMailNotification($share->getNode()->getName(),
$link,
$share->getShareOwner(),
$share->getSharedBy(), $share->getSharedWith());
} catch (HintException $hintException) {
$this->logger->error('Failed to send share by mail: ' . $hintException->getMessage());
$this->removeShareFromTable($shareId);
throw $hintException;
} catch (\Exception $e) {
$this->logger->error('Failed to send share by mail: ' . $e->getMessage());
$this->removeShareFromTable($shareId);
throw new HintException('Failed to send share by mail',
$this->l->t('Failed to send share by E-mail'));
}
return $shareId;
}
protected function sendMailNotification($filename, $link, $owner, $initiator, $shareWith) {
$ownerUser = $this->userManager->get($owner);
$initiatorUser = $this->userManager->get($initiator);
$ownerDisplayName = ($ownerUser instanceof IUser) ? $ownerUser->getDisplayName() : $owner;
$initiatorDisplayName = ($initiatorUser instanceof IUser) ? $initiatorUser->getDisplayName() : $initiator;
if ($owner === $initiator) {
$subject = (string)$this->l->t('%s shared »%s« with you', array($ownerDisplayName, $filename));
} else {
$subject = (string)$this->l->t('%s shared »%s« with you on behalf of %s', array($ownerDisplayName, $filename, $initiatorDisplayName));
}
$message = $this->mailer->createMessage();
$htmlBody = $this->createMailBody('mail', $filename, $link, $ownerDisplayName, $initiatorDisplayName);
$textBody = $this->createMailBody('altmail', $filename, $link, $ownerDisplayName, $initiatorDisplayName);
$message->setTo([$shareWith]);
$message->setSubject($subject);
$message->setBody($textBody, 'text/plain');
$message->setHtmlBody($htmlBody);
$this->mailer->send($message);
}
/**
* create mail body
*
* @param $filename
* @param $link
* @param $owner
* @param $initiator
* @return string plain text mail
* @throws HintException
*/
protected function createMailBody($template, $filename, $link, $owner, $initiator) {
$mailBodyTemplate = new Template('sharebymail', $template, '');
$mailBodyTemplate->assign ('filename', \OCP\Util::sanitizeHTML($filename));
$mailBodyTemplate->assign ('link', $link);
$mailBodyTemplate->assign ('owner', \OCP\Util::sanitizeHTML($owner));
$mailBodyTemplate->assign ('initiator', \OCP\Util::sanitizeHTML($initiator));
$mailBodyTemplate->assign ('onBehalfOf', $initiator !== $owner);
$mailBody = $mailBodyTemplate->fetchPage();
if (is_string($mailBody)) {
return $mailBody;
}
throw new HintException('Failed to create the E-mail',
$this->l->t('Failed to create the E-mail'));
}
/**
* send password to recipient of a mail share
*
* @param string $filename
* @param string $initiator
* @param string $shareWith
*/
protected function sendPassword($filename, $initiator, $shareWith, $password) {
$initiatorUser = $this->userManager->get($initiator);
$initiatorDisplayName = ($initiatorUser instanceof IUser) ? $initiatorUser->getDisplayName() : $initiator;
$subject = (string)$this->l->t('Password to access »%s« shared to you by %s', [$filename, $initiatorDisplayName]);
$message = $this->mailer->createMessage();
$htmlBody = $this->createMailBodyToSendPassword('mailpassword', $filename, $initiatorDisplayName, $password);
$textBody = $this->createMailBodyToSendPassword('altmailpassword', $filename,$initiatorDisplayName, $password);
$message->setTo([$shareWith]);
$message->setSubject($subject);
$message->setBody($textBody, 'text/plain');
$message->setHtmlBody($htmlBody);
$this->mailer->send($message);
}
/**
* create mail body to send password to recipient
*
* @param string $filename
* @param string $initiator
* @param string $password
* @return string plain text mail
* @throws HintException
*/
protected function createMailBodyToSendPassword($template, $filename, $initiator, $password) {
$mailBodyTemplate = new Template('sharebymail', $template, '');
$mailBodyTemplate->assign ('filename', \OCP\Util::sanitizeHTML($filename));
$mailBodyTemplate->assign ('password', \OCP\Util::sanitizeHTML($password));
$mailBodyTemplate->assign ('initiator', \OCP\Util::sanitizeHTML($initiator));
$mailBody = $mailBodyTemplate->fetchPage();
if (is_string($mailBody)) {
return $mailBody;
}
throw new HintException('Failed to create the E-mail',
$this->l->t('Failed to create the E-mail'));
}
/**
* generate share token
*
* @return string
*/
protected function generateToken() {
$token = $this->secureRandom->generate(
15, ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_UPPER . ISecureRandom::CHAR_DIGITS);
return $token;
}
/**
* Get all children of this share
*
* @param IShare $parent
* @return IShare[]
*/
public function getChildren(IShare $parent) {
$children = [];
$qb = $this->dbConnection->getQueryBuilder();
$qb->select('*')
->from('share')
->where($qb->expr()->eq('parent', $qb->createNamedParameter($parent->getId())))
->andWhere($qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL)))
->orderBy('id');
$cursor = $qb->execute();
while($data = $cursor->fetch()) {
$children[] = $this->createShareObject($data);
}
$cursor->closeCursor();
return $children;
}
/**
* add share to the database and return the ID
*
* @param int $itemSource
* @param string $itemType
* @param string $shareWith
* @param string $sharedBy
* @param string $uidOwner
* @param int $permissions
* @param string $token
* @return int
*/
protected function addShareToDB($itemSource, $itemType, $shareWith, $sharedBy, $uidOwner, $permissions, $token) {
$qb = $this->dbConnection->getQueryBuilder();
$qb->insert('share')
->setValue('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL))
->setValue('item_type', $qb->createNamedParameter($itemType))
->setValue('item_source', $qb->createNamedParameter($itemSource))
->setValue('file_source', $qb->createNamedParameter($itemSource))
->setValue('share_with', $qb->createNamedParameter($shareWith))
->setValue('uid_owner', $qb->createNamedParameter($uidOwner))
->setValue('uid_initiator', $qb->createNamedParameter($sharedBy))
->setValue('permissions', $qb->createNamedParameter($permissions))
->setValue('token', $qb->createNamedParameter($token))
->setValue('stime', $qb->createNamedParameter(time()));
/*
* Added to fix https://github.com/owncloud/core/issues/22215
* Can be removed once we get rid of ajax/share.php
*/
$qb->setValue('file_target', $qb->createNamedParameter(''));
$qb->execute();
$id = $qb->getLastInsertId();
return (int)$id;
}
/**
* Update a share
*
* @param IShare $share
* @param string|null $plainTextPassword
* @return IShare The share object
*/
public function update(IShare $share, $plainTextPassword = null) {
$originalShare = $this->getShareById($share->getId());
// a real password was given
$validPassword = $plainTextPassword !== null && $plainTextPassword !== '';
if($validPassword && $originalShare->getPassword() !== $share->getPassword()) {
$this->sendPassword($share->getNode()->getName(), $share->getSharedBy(), $share->getSharedWith(), $plainTextPassword);
}
/*
* We allow updating the permissions and password of mail 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()))
->set('password', $qb->createNamedParameter($share->getPassword()))
->execute();
return $share;
}
/**
* @inheritdoc
*/
public function move(IShare $share, $recipient) {
/**
* nothing to do here, mail shares are only outgoing shares
*/
return $share;
}
/**
* Delete a share (owner unShares the file)
*
* @param IShare $share
*/
public function delete(IShare $share) {
$this->removeShareFromTable($share->getId());
}
/**
* @inheritdoc
*/
public function deleteFromSelf(IShare $share, $recipient) {
// nothing to do here, mail shares are only outgoing shares
return;
}
/**
* @inheritdoc
*/
public function getSharesBy($userId, $shareType, $node, $reshares, $limit, $offset) {
$qb = $this->dbConnection->getQueryBuilder();
$qb->select('*')
->from('share');
$qb->andWhere($qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL)));
/**
* Reshares for this user are shares where they are the owner.
*/
if ($reshares === false) {
//Special case for old shares created via the web UI
$or1 = $qb->expr()->andX(
$qb->expr()->eq('uid_owner', $qb->createNamedParameter($userId)),
$qb->expr()->isNull('uid_initiator')
);
$qb->andWhere(
$qb->expr()->orX(
$qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId)),
$or1
)
);
} else {
$qb->andWhere(
$qb->expr()->orX(
$qb->expr()->eq('uid_owner', $qb->createNamedParameter($userId)),
$qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId))
)
);
}
if ($node !== null) {
$qb->andWhere($qb->expr()->eq('file_source', $qb->createNamedParameter($node->getId())));
}
if ($limit !== -1) {
$qb->setMaxResults($limit);
}
$qb->setFirstResult($offset);
$qb->orderBy('id');
$cursor = $qb->execute();
$shares = [];
while($data = $cursor->fetch()) {
$shares[] = $this->createShareObject($data);
}
$cursor->closeCursor();
return $shares;
}
/**
* @inheritdoc
*/
public function getShareById($id, $recipientId = null) {
$qb = $this->dbConnection->getQueryBuilder();
$qb->select('*')
->from('share')
->where($qb->expr()->eq('id', $qb->createNamedParameter($id)))
->andWhere($qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL)));
$cursor = $qb->execute();
$data = $cursor->fetch();
$cursor->closeCursor();
if ($data === false) {
throw new ShareNotFound();
}
try {
$share = $this->createShareObject($data);
} catch (InvalidShare $e) {
throw new ShareNotFound();
}
return $share;
}
/**
* Get shares for a given path
*
* @param \OCP\Files\Node $path
* @return IShare[]
*/
public function getSharesByPath(Node $path) {
$qb = $this->dbConnection->getQueryBuilder();
$cursor = $qb->select('*')
->from('share')
->andWhere($qb->expr()->eq('file_source', $qb->createNamedParameter($path->getId())))
->andWhere($qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL)))
->execute();
$shares = [];
while($data = $cursor->fetch()) {
$shares[] = $this->createShareObject($data);
}
$cursor->closeCursor();
return $shares;
}
/**
* @inheritdoc
*/
public function getSharedWith($userId, $shareType, $node, $limit, $offset) {
/** @var IShare[] $shares */
$shares = [];
//Get shares directly with this user
$qb = $this->dbConnection->getQueryBuilder();
$qb->select('*')
->from('share');
// Order by id
$qb->orderBy('id');
// Set limit and offset
if ($limit !== -1) {
$qb->setMaxResults($limit);
}
$qb->setFirstResult($offset);
$qb->where($qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL)));
$qb->andWhere($qb->expr()->eq('share_with', $qb->createNamedParameter($userId)));
// Filter by node if provided
if ($node !== null) {
$qb->andWhere($qb->expr()->eq('file_source', $qb->createNamedParameter($node->getId())));
}
$cursor = $qb->execute();
while($data = $cursor->fetch()) {
$shares[] = $this->createShareObject($data);
}
$cursor->closeCursor();
return $shares;
}
/**
* Get a share by token
*
* @param string $token
* @return IShare
* @throws ShareNotFound
*/
public function getShareByToken($token) {
$qb = $this->dbConnection->getQueryBuilder();
$cursor = $qb->select('*')
->from('share')
->where($qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL)))
->andWhere($qb->expr()->eq('token', $qb->createNamedParameter($token)))
->execute();
$data = $cursor->fetch();
if ($data === false) {
throw new ShareNotFound('Share not found', $this->l->t('Could not find share'));
}
try {
$share = $this->createShareObject($data);
} catch (InvalidShare $e) {
throw new ShareNotFound('Share not found', $this->l->t('Could not find share'));
}
return $share;
}
/**
* remove share from table
*
* @param string $shareId
*/
protected function removeShareFromTable($shareId) {
$qb = $this->dbConnection->getQueryBuilder();
$qb->delete('share')
->where($qb->expr()->eq('id', $qb->createNamedParameter($shareId)));
$qb->execute();
}
/**
* Create a share object from an database row
*
* @param array $data
* @return IShare
* @throws InvalidShare
* @throws ShareNotFound
*/
protected function createShareObject($data) {
$share = new Share($this->rootFolder, $this->userManager);
$share->setId((int)$data['id'])
->setShareType((int)$data['share_type'])
->setPermissions((int)$data['permissions'])
->setTarget($data['file_target'])
->setMailSend((bool)$data['mail_send'])
->setToken($data['token']);
$shareTime = new \DateTime();
$shareTime->setTimestamp((int)$data['stime']);
$share->setShareTime($shareTime);
$share->setSharedWith($data['share_with']);
$share->setPassword($data['password']);
if ($data['uid_initiator'] !== null) {
$share->setShareOwner($data['uid_owner']);
$share->setSharedBy($data['uid_initiator']);
} else {
//OLD SHARE
$share->setSharedBy($data['uid_owner']);
$path = $this->getNode($share->getSharedBy(), (int)$data['file_source']);
$owner = $path->getOwner();
$share->setShareOwner($owner->getUID());
}
$share->setNodeId((int)$data['file_source']);
$share->setNodeType($data['item_type']);
$share->setProviderId($this->identifier());
return $share;
}
/**
* Get the node with file $id for $user
*
* @param string $userId
* @param int $id
* @return \OCP\Files\File|\OCP\Files\Folder
* @throws InvalidShare
*/
private function getNode($userId, $id) {
try {
$userFolder = $this->rootFolder->getUserFolder($userId);
} catch (NotFoundException $e) {
throw new InvalidShare();
}
$nodes = $userFolder->getById($id);
if (empty($nodes)) {
throw new InvalidShare();
}
return $nodes[0];
}
/**
* A user is deleted from the system
* So clean up the relevant shares.
*
* @param string $uid
* @param int $shareType
*/
public function userDeleted($uid, $shareType) {
$qb = $this->dbConnection->getQueryBuilder();
$qb->delete('share')
->where($qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL)))
->andWhere($qb->expr()->eq('uid_owner', $qb->createNamedParameter($uid)))
->execute();
}
/**
* This provider does not support group shares
*
* @param string $gid
*/
public function groupDeleted($gid) {
return;
}
/**
* This provider does not support group shares
*
* @param string $uid
* @param string $gid
*/
public function userDeletedFromGroup($uid, $gid) {
return;
}
/**
* get database row of a give share
*
* @param $id
* @return array
* @throws ShareNotFound
*/
protected function getRawShare($id) {
// Now fetch the inserted share and create a complete share object
$qb = $this->dbConnection->getQueryBuilder();
$qb->select('*')
->from('share')
->where($qb->expr()->eq('id', $qb->createNamedParameter($id)));
$cursor = $qb->execute();
$data = $cursor->fetch();
$cursor->closeCursor();
if ($data === false) {
throw new ShareNotFound;
}
return $data;
}
public function getSharesInFolder($userId, Folder $node, $reshares) {
$qb = $this->dbConnection->getQueryBuilder();
$qb->select('*')
->from('share', 's')
->andWhere($qb->expr()->orX(
$qb->expr()->eq('item_type', $qb->createNamedParameter('file')),
$qb->expr()->eq('item_type', $qb->createNamedParameter('folder'))
))
->andWhere(
$qb->expr()->eq('share_type', $qb->createNamedParameter(\OCP\Share::SHARE_TYPE_EMAIL))
);
/**
* Reshares for this user are shares where they are the owner.
*/
if ($reshares === false) {
$qb->andWhere($qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId)));
} else {
$qb->andWhere(
$qb->expr()->orX(
$qb->expr()->eq('uid_owner', $qb->createNamedParameter($userId)),
$qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId))
)
);
}
$qb->innerJoin('s', 'filecache' ,'f', 's.file_source = f.fileid');
$qb->andWhere($qb->expr()->eq('f.parent', $qb->createNamedParameter($node->getId())));
$qb->orderBy('id');
$cursor = $qb->execute();
$shares = [];
while ($data = $cursor->fetch()) {
$shares[$data['fileid']][] = $this->createShareObject($data);
}
$cursor->closeCursor();
return $shares;
}
}