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ShareService.php
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ShareService.php
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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2017 Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\Polls\Service;
use OCA\Polls\Db\CommentMapper;
use OCA\Polls\Db\OptionMapper;
use OCA\Polls\Db\Poll;
use OCA\Polls\Db\PollMapper;
use OCA\Polls\Db\Share;
use OCA\Polls\Db\ShareMapper;
use OCA\Polls\Db\UserMapper;
use OCA\Polls\Db\VoteMapper;
use OCA\Polls\Event\ShareChangedDisplayNameEvent;
use OCA\Polls\Event\ShareChangedEmailEvent;
use OCA\Polls\Event\ShareChangedLabelEvent;
use OCA\Polls\Event\ShareChangedRegistrationConstraintEvent;
use OCA\Polls\Event\ShareCreateEvent;
use OCA\Polls\Event\ShareDeletedEvent;
use OCA\Polls\Event\ShareLockedEvent;
use OCA\Polls\Event\ShareRegistrationEvent;
use OCA\Polls\Event\ShareTypeChangedEvent;
use OCA\Polls\Exceptions\ForbiddenException;
use OCA\Polls\Exceptions\InvalidShareTypeException;
use OCA\Polls\Exceptions\InvalidUsernameException;
use OCA\Polls\Exceptions\NotFoundException;
use OCA\Polls\Exceptions\ShareAlreadyExistsException;
use OCA\Polls\Exceptions\ShareNotFoundException;
use OCA\Polls\Model\Acl as Acl;
use OCA\Polls\Model\SentResult;
use OCA\Polls\Model\UserBase;
use OCA\Polls\UserSession;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\DB\Exception;
use OCP\EventDispatcher\IEventDispatcher;
use OCP\Security\ISecureRandom;
use Psr\Log\LoggerInterface;
class ShareService {
private const SHARES_TO_CONVERT_ON_ACCESS = [
Share::TYPE_EMAIL,
Share::TYPE_CONTACT,
];
/** @var Share[] * */
private array $shares;
/**
* @psalm-suppress PossiblyUnusedMethod
*/
public function __construct(
private LoggerInterface $logger,
private IEventDispatcher $eventDispatcher,
private ISecureRandom $secureRandom,
private ShareMapper $shareMapper,
private SystemService $systemService,
private Share $share,
private MailService $mailService,
private Acl $acl,
private NotificationService $notificationService,
private PollMapper $pollMapper,
private UserMapper $userMapper,
private UserSession $userSession,
private VoteMapper $voteMapper,
private OptionMapper $optionMapper,
private CommentMapper $commentMapper,
) {
$this->shares = [];
}
/**
* Read all shares of a poll based on the poll id and return list as array
*
* @return Share[]
*
* @psalm-return array<array-key, Share>
*/
public function list(int $pollId): array {
try {
$this->pollMapper->find($pollId)->request(Poll::PERMISSION_POLL_EDIT);
$this->shares = $this->shareMapper->findByPoll($pollId);
} catch (ForbiddenException $e) {
return [];
} catch (DoesNotExistException $e) {
return [];
}
$this->sortByCategory();
return $this->shares;
}
/**
* Read all univited shares of a poll based on the poll id and return list as array
*
* @return Share[]
*
* @psalm-return array<array-key, Share>
*/
public function listNotInvited(int $pollId): array {
try {
$this->pollMapper->find($pollId)->request(Poll::PERMISSION_POLL_EDIT);
$this->shares = $this->shareMapper->findByPollNotInvited($pollId);
} catch (ForbiddenException $e) {
return [];
} catch (DoesNotExistException $e) {
return [];
}
$this->sortByCategory();
return $this->shares;
}
/**
* Converts the public share to a personal share for hte current logged in user
* If user is not authorized for this poll, create a personal share
* for this user and return the created share instead of the public share
*/
private function convertPublicShareToPersonalShare(): void {
try {
$this->share = $this->createNewShare(
$this->share->getPollId(),
$this->userSession->getUser(),
preventInvitation: true
);
} catch (ShareAlreadyExistsException $e) {
// replace share by existing personal share
$this->share = $e->getShare()
?? $this->share = $this->shareMapper->findByPollAndUser($this->share->getPollId(), $this->userSession->getCurrentUserId());
// remove the public token from session
$this->userSession->setShareToken($this->share->getToken());
}
}
/**
* Get share by token for accessing the poll
*
* @param string $token Token of share to get
*/
public function request(string $token): Share {
$this->share = $this->shareMapper->findByToken($token);
$this->validateShareType();
// deletes the displayname, to avoid displayname preset in case of public polls
if ($this->share->getType() === Share::TYPE_PUBLIC) {
$this->share->setDisplayName('');
}
// Exception: logged in user, accesses the poll via public share link
if ($this->share->getType() === Share::TYPE_PUBLIC && $this->userSession->getIsLoggedIn()) {
$this->convertPublicShareToPersonalShare();
}
// Exception for convertable (email and contact) shares
if (in_array($this->share->getType(), Share::CONVERATABLE_PUBLIC_SHARES, true)) {
$this->convertPersonalPublicShareToExternalShare();
}
return $this->share;
}
/**
* Get share by token for accessing the poll
*
* @param string $token Token of share to get
*/
public function get(string $token): Share {
return $this->share = $this->shareMapper->findByToken($token);
}
/**
* Change share type
*/
public function setType(string $token, string $type): Share {
$this->share = $this->shareMapper->findByToken($token);
$this->pollMapper->find($this->share->getPollId())->request(Poll::PERMISSION_POLL_EDIT);
// ATM only type user can transform to type admin and vice versa
if (($type === Share::TYPE_ADMIN && $this->share->getType() === Share::TYPE_USER)
|| ($type === Share::TYPE_USER && $this->share->getType() === Share::TYPE_ADMIN)) {
$this->share->setType($type);
$this->share = $this->shareMapper->update($this->share);
$this->eventDispatcher->dispatchTyped(new ShareTypeChangedEvent($this->share));
}
return $this->share;
}
/**
* Change share type
*/
public function setPublicPollEmail(string $token, string $value): Share {
try {
$this->share = $this->shareMapper->findByToken($token);
$this->pollMapper->find($this->share->getPollId())->request(Poll::PERMISSION_POLL_EDIT);
$this->share->setPublicPollEmail($value);
$this->share = $this->shareMapper->update($this->share);
} catch (ShareNotFoundException $e) {
throw new NotFoundException('Token ' . $token . ' does not exist');
}
$this->eventDispatcher->dispatchTyped(new ShareChangedRegistrationConstraintEvent($this->share));
return $this->share;
}
/**
* Set emailAddress of personal public share
*
* @return Share
*/
public function setEmailAddress(Share $share, string $emailAddress, bool $emptyIsValid = false): Share {
if ($share->getType() === Share::TYPE_EXTERNAL) {
MailService::validateEmailAddress($emailAddress, $emptyIsValid);
$share->setEmailAddress($emailAddress);
// TODO: Send confirmation
$share = $this->shareMapper->update($share);
} else {
throw new InvalidShareTypeException('Email address can only be set in external shares.');
}
$this->eventDispatcher->dispatchTyped(new ShareChangedEmailEvent($share));
return $share;
}
/**
* Set displayName of personal share
*
* @return Share
*/
public function setDisplayName(string $displayName, string $token): Share {
$this->share = $this->shareMapper->findByToken($token);
if ($this->share->getType() === Share::TYPE_EXTERNAL) {
$displayName = $this->systemService->validatePublicUsername($displayName, share: $this->share);
$this->share->setDisplayName($displayName);
$dispatchEvent = new ShareChangedDisplayNameEvent($this->share);
} else {
throw new InvalidShareTypeException('Displayname can only be set for external shares.');
}
$this->share = $this->shareMapper->update($this->share);
$this->eventDispatcher->dispatchTyped($dispatchEvent);
return $this->share;
}
/**
* Set label of public share
*
* @return Share
*/
public function setLabel(string $label, string $token): Share {
$this->share = $this->shareMapper->findByToken($token);
if ($this->share->getType() === Share::TYPE_PUBLIC) {
$this->pollMapper->find($this->share->getPollId())->request(Poll::PERMISSION_POLL_EDIT);
$this->share->setLabel($label);
// overwrite any possible displayName
// TODO: Remove afte rmigratiuon to label
$this->share->setDisplayName('');
$dispatchEvent = new ShareChangedLabelEvent($this->share);
} else {
throw new InvalidShareTypeException('Label can only be set for public shares.');
}
$this->share = $this->shareMapper->update($this->share);
$this->eventDispatcher->dispatchTyped($dispatchEvent);
return $this->share;
}
/**
* Delete emailAddress of the personal share
*/
public function deleteEmailAddress(Share $share): Share {
if ($share->getType() === Share::TYPE_EXTERNAL) {
$share->setEmailAddress('');
return $this->shareMapper->update($share);
} else {
throw new InvalidShareTypeException('Email address can only be set in external shares.');
}
}
/**
* Convert convertable public shares to external share and generates a unique user id
* @param string|null $userId
* @param string|null $displayName
* @param string|null $emailAddress
* @param string|null $timeZone
* @param string|null $language
*/
private function convertPersonalPublicShareToExternalShare(
?string $userId = null,
?string $displayName = null,
?string $emailAddress = null,
?string $timeZone = null,
?string $language = null,
): void {
// paranoia double check
if (!in_array($this->share->getType(), Share::CONVERATABLE_PUBLIC_SHARES, true)) {
return;
}
$initialUserId = $this->share->getUserId();
$this->share->setUserId($userId ?? $this->generatePublicUserId());
$this->share->setDisplayName($displayName ?? $this->share->getDisplayName());
$this->share->setTimeZoneName($timeZone ?? $this->share->getTimeZoneName());
$this->share->setLanguage($language ?? $this->share->getLanguage());
if ($emailAddress && $emailAddress !== $this->share->getEmailAddress()) {
// reset invitation sent, if email address is changed
$this->share->setInvitationSent(0);
}
$this->share->setEmailAddress($emailAddress ?? $this->share->getEmailAddress());
// convert to type external
$this->share->setType(Share::TYPE_EXTERNAL);
// remove personal information from user id
$this->share->setUserId($this->generatePublicUserId());
$this->share = $this->shareMapper->update($this->share);
$this->convertDependingObjects($initialUserId, $this->share->getUserId(), $this->share->getPollId());
}
/**
* Rename userId as a follow up on renaming share's userId
* This methods covers the situation, where a userId of a share
* is changed, but there are already existing votes or options
* belonging to the renamed user
*
* This situation could occur, if a user already registered before the update to 7.2.4 and
* already voted, commented or suggested an option and reenters the poll with an email or contact share
*
* added in Polls 7.2.4 (can be removed later)
*/
private function convertDependingObjects(string $userId, string $replacementId, int $pollId): void {
$this->voteMapper->renameUserId($userId, $replacementId, $pollId);
$this->optionMapper->renameUserId($userId, $replacementId, $pollId);
$this->commentMapper->renameUserId($userId, $replacementId, $pollId);
}
/**
* Create a personal share from a public share
* or update an email share with the displayName
* @param string $publicShareToken
* @param string $displayName
* @param string $emailAddress
* @param string $timeZone
* @return Share
*/
public function register(
string $publicShareToken,
string $displayName,
string $emailAddress = '',
string $timeZone = '',
): Share {
$this->share = $this->get($publicShareToken);
$displayName = $this->systemService->validatePublicUsername($displayName, share: $this->share);
if ($this->share->getPublicPollEmail() !== Share::EMAIL_DISABLED) {
MailService::validateEmailAddress($emailAddress, $this->share->getPublicPollEmail() !== Share::EMAIL_MANDATORY);
}
$language = $this->systemService->getGenericLanguage();
$userId = $this->generatePublicUserId();
if ($this->share->getType() === Share::TYPE_PUBLIC) {
// Create new external share for user, who entered the poll via public link,
// prevent invtation sending, when no email address is given
$this->createNewShare(
$this->share->getPollId(),
$this->userMapper->getUserObject(Share::TYPE_EXTERNAL, $userId, $displayName, $emailAddress, $language, $language, $timeZone),
!$emailAddress,
$timeZone
);
$this->eventDispatcher->dispatchTyped(new ShareRegistrationEvent($this->share));
} elseif (in_array($this->share->getType(), Share::CONVERATABLE_PUBLIC_SHARES, true)) {
// Convert email and contact shares to external share, if user registers
// this should be avoided by the actual use cases, but keep code in case of later changes
$this->convertPersonalPublicShareToExternalShare($userId, $displayName, $emailAddress, $timeZone, $language);
} else {
throw new ForbiddenException('Share does not allow registering for poll');
}
// send invitation mail, if invitationSent has no timestamp
try {
if (!$this->share->getInvitationSent()) {
$this->mailService->sendInvitation($this->share);
}
} catch (\Exception $e) {
$this->logger->error('Error sending Mail', ['emailAddress' => $this->share->getEmailAddress()]);
}
return $this->share;
}
/**
* Delete or restore share by Token
* @param string $token Share of token to delete
* @param bool $restore Set true, if share is to be restored
*/
public function deleteByToken(string $token, bool $restore = false): Share {
$share = $this->shareMapper->findByToken($token, true);
return $this->delete($share, $restore);
}
/**
* Delete or restore share
* @param Share $share Share to delete or restore
* @param bool $restore Set true, if share is to be restored
*/
public function delete(Share $share, bool $restore = false): Share {
$this->pollMapper->find($share->getPollId())->request(Poll::PERMISSION_POLL_EDIT);
$share->setDeleted($restore ? 0 : time());
$this->shareMapper->update($share);
$this->eventDispatcher->dispatchTyped(new ShareDeletedEvent($share));
return $share;
}
/**
* Lock or unlock share
* @param string $token Share of token to lock/unlock
* @param bool $unlock Set true, if share is to be unlocked
*/
public function lockByToken(string $token, bool $unlock = false): Share {
$share = $this->shareMapper->findByToken($token, getDeleted: true);
return $this->lock($share, unlock: $unlock);
}
/**
* Lock or unlock share
* @param Share $share Share to lock/unlock
* @param bool $unlock Set true, if share is to be unlocked
*/
private function lock(Share $share, bool $unlock = false): Share {
$this->pollMapper->find($share->getPollId())->request(Poll::PERMISSION_POLL_EDIT);
$share->setLocked($unlock ? 0 : time());
$this->shareMapper->update($share);
$this->eventDispatcher->dispatchTyped(new ShareLockedEvent($share));
return $share;
}
public function sendAllInvitations(int $pollId): ?SentResult {
$sentResult = new SentResult();
// first resolve group shares
$shares = $this->listNotInvited($pollId);
foreach ($shares as $share) {
if (in_array($share->getType(), Share::RESOLVABLE_SHARES)) {
$this->resolveGroup($share);
}
}
// finally send invitation for all not already invited sharees
$shares = $this->listNotInvited($pollId);
foreach ($shares as $share) {
if (!in_array($share->getType(), Share::RESOLVABLE_SHARES)) {
$this->sendInvitation($share, $sentResult);
}
}
return $sentResult;
}
/**
* Resolve a group share into it's member shares and and replace the group share
* @param string $token Token of share to lock/unlock
*/
public function resolveGroupByToken(string $token): array {
$share = $this->get($token);
return $this->resolveGroup($share);
}
/**
* Resolve a group share into it's member shares and and replace the group share
* @param Share $share Share to lock/unlock
*/
private function resolveGroup(Share $share): array {
$shares = [];
if (!in_array($share->getType(), Share::RESOLVABLE_SHARES)) {
throw new InvalidShareTypeException('Cannot resolve members from share type ' . $share->getType());
}
foreach ($this->userMapper->getUserObject($share->getType(), $share->getUserId())->getMembers() as $member) {
try {
$newShare = $this->add($share->getPollId(), $member->getType(), $member->getId());
$shares[] = $newShare;
} catch (ShareAlreadyExistsException $e) {
continue;
}
}
$this->delete($share);
return $shares;
}
/**
* Sent invitation mails for a share
* Additionally send notification via notifications
* @param Share $share
* @param SentResult $sentResult to collect results
*/
public function sendInvitation(Share $share, ?SentResult &$sentResult = null): ?SentResult {
if (in_array($share->getType(), [Share::TYPE_USER, Share::TYPE_ADMIN], true)) {
$this->notificationService->sendInvitation($share->getPollId(), $share->getUserId());
} elseif ($share->getType() === Share::TYPE_GROUP) {
foreach ($this->userMapper->getUserFromShare($share)->getMembers() as $member) {
$this->notificationService->sendInvitation($share->getPollId(), $member->getId());
}
}
return $this->mailService->sendInvitation($share, $sentResult);
}
private function generatePublicUserId(string $prefix = 'ex_'): string {
$publicUserId = '';
while ($publicUserId === '') {
$publicUserId = $prefix . $this->secureRandom->generate(
8,
ISecureRandom::CHAR_DIGITS .
ISecureRandom::CHAR_LOWER .
ISecureRandom::CHAR_UPPER
);
try {
// make sure, the user id is unique
$publicUserId = $this->systemService->validatePublicUsername($publicUserId, share: $this->share);
} catch (InvalidUsernameException $e) {
$publicUserId = '';
}
}
return $publicUserId;
}
/**
* Add share
*
* @return Share
*/
public function add(
int $pollId,
string $type,
string $userId = '',
string $displayName = '',
string $emailAddress = '',
): Share {
$this->pollMapper->find($pollId)->request(Poll::PERMISSION_POLL_EDIT);
if ($type === UserBase::TYPE_PUBLIC) {
$this->acl->request(Acl::PERMISSION_PUBLIC_SHARES);
}
$share = $this->createNewShare($pollId, $this->userMapper->getUserObject($type, $userId, $displayName, $emailAddress));
$this->eventDispatcher->dispatchTyped(new ShareCreateEvent($share));
return $share;
}
private function sortByCategory(): void {
$sortedShares = [];
foreach (Share::TYPE_SORT_ARRAY as $shareType) {
$filteredShares = array_filter($this->shares, function ($share) use ($shareType) {
return $share->getType() === $shareType;
});
$sortedShares = array_merge($sortedShares, $filteredShares);
}
$this->shares = $sortedShares;
}
/**
* Validate if share type is allowed to be used in a public poll
* or is accessibale for use by the current user
*/
private function validateShareType(): void {
$valid = match ($this->share->getType()) {
Share::TYPE_PUBLIC, Share::TYPE_EMAIL, Share::TYPE_EXTERNAL => true,
Share::TYPE_USER => $this->share->getUserId() === $this->userSession->getCurrentUserId(),
Share::TYPE_ADMIN => $this->share->getUserId() === $this->userSession->getCurrentUserId(),
// Note: $this->share->getUserId() is actually the group name in case of Share::TYPE_GROUP
Share::TYPE_GROUP => $this->userSession->getUser()->getIsInGroup($this->share->getUserId()),
default => throw new ForbiddenException('Invalid share type ' . $this->share->getType()),
};
if (!$valid) {
throw new ForbiddenException('User is not allowed to use this share for poll access (' . $this->share->getType() . ')');
}
}
private function generateToken(): string {
$token = null;
$loopCounter = 0;
while ($token === null) {
$loopCounter++;
$token = $this->secureRandom->generate(
8,
ISecureRandom::CHAR_DIGITS .
ISecureRandom::CHAR_LOWER .
ISecureRandom::CHAR_UPPER
);
try {
$this->shareMapper->findByToken($token, true);
// reset token, if it already exists
$token = null;
} catch (ShareNotFoundException) {
$loopCounter = 0;
}
if ($loopCounter > 10) {
// In case of uninspected situations, avoid an endless loop
throw new \Exception('Unexpected loop count while trying to create a token for a new share');
}
}
return $token;
}
/**
* crate a new share
*/
private function createNewShare(
int $pollId,
UserBase $userGroup,
bool $preventInvitation = false,
string $timeZone = '',
): Share {
$preventInvitation = $userGroup->getType() === UserBase::TYPE_PUBLIC ?: $preventInvitation;
// Generate a unique id
$token = $this->generateToken();
$this->share = new Share();
$this->share->setToken($token);
$this->share->setPollId($pollId);
$this->share->setType($userGroup->getShareType());
$this->share->setDisplayName($userGroup->getDisplayName());
$this->share->setInvitationSent($preventInvitation ? time() : 0);
$this->share->setEmailAddress($userGroup->getEmailAddress());
$this->share->setUserId($userGroup->getShareUserId());
// normal continuation
// public share to create, set token as userId
if ($userGroup->getType() === UserBase::TYPE_PUBLIC) {
$this->share->setUserId($token);
}
// user is created from public share. Store locale information for
// usage in server side actions, i.e. scheduled emails
if ($userGroup->getType() === UserBase::TYPE_EXTERNAL) {
$this->share->setLanguage($userGroup->getLanguageCode());
$this->share->setTimeZoneName($timeZone);
}
try {
$this->share = $this->shareMapper->insert($this->share);
// return new created share
return $this->share;
} catch (Exception $e) {
// TODO: Change exception catch to actual exception
// Currently OC\DB\Exceptions\DbalException is thrown instead of
// UniqueConstraintViolationException
// since the exception is from private namespace, we check the type string
if (get_class($e) === 'OC\DB\Exceptions\DbalException' && $e->getReason() === Exception::REASON_UNIQUE_CONSTRAINT_VIOLATION) {
$share = $this->shareMapper->findByPollAndUser($pollId, $this->share->getUserId(), true);
if ($share->getDeleted()) {
// Deleted share exist, restore deleted share and generate new token
$share->setDeleted(0);
$share->setLocked(0);
$share->setInvitationSent(0);
$share->setToken($this->generateToken());
if ($share->getType() === UserBase::TYPE_ADMIN) {
$share->setType(UserBase::TYPE_USER);
}
$share = $this->shareMapper->update($share);
}
// return existing undeleted share
throw new ShareAlreadyExistsException(existingShare: $share);
}
// other error
throw $e;
}
}
}