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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\SystemTag;
use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use OCP\SystemTag\ISystemTagManager;
use OCP\SystemTag\ManagerEvent;
use OCP\SystemTag\TagAlreadyExistsException;
use OCP\SystemTag\TagNotFoundException;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use OCP\IGroupManager;
use OCP\SystemTag\ISystemTag;
use OCP\IUser;
/**
* Manager class for system tags
*/
class SystemTagManager implements ISystemTagManager {
const TAG_TABLE = 'systemtag';
const TAG_GROUP_TABLE = 'systemtag_group';
/** @var IDBConnection */
protected $connection;
/** @var EventDispatcherInterface */
protected $dispatcher;
/** @var IGroupManager */
protected $groupManager;
/**
* Prepared query for selecting tags directly
*
* @var \OCP\DB\QueryBuilder\IQueryBuilder
*/
private $selectTagQuery;
/**
* Constructor.
*
* @param IDBConnection $connection database connection
* @param EventDispatcherInterface $dispatcher
*/
public function __construct(
IDBConnection $connection,
IGroupManager $groupManager,
EventDispatcherInterface $dispatcher
) {
$this->connection = $connection;
$this->groupManager = $groupManager;
$this->dispatcher = $dispatcher;
$query = $this->connection->getQueryBuilder();
$this->selectTagQuery = $query->select('*')
->from(self::TAG_TABLE)
->where($query->expr()->eq('name', $query->createParameter('name')))
->andWhere($query->expr()->eq('visibility', $query->createParameter('visibility')))
->andWhere($query->expr()->eq('editable', $query->createParameter('editable')));
}
/**
* {@inheritdoc}
*/
public function getTagsByIds($tagIds) {
if (!is_array($tagIds)) {
$tagIds = [$tagIds];
}
$tags = [];
// note: not all databases will fail if it's a string or starts with a number
foreach ($tagIds as $tagId) {
if (!is_numeric($tagId)) {
throw new \InvalidArgumentException('Tag id must be integer');
}
}
$query = $this->connection->getQueryBuilder();
$query->select('*')
->from(self::TAG_TABLE)
->where($query->expr()->in('id', $query->createParameter('tagids')))
->addOrderBy('name', 'ASC')
->addOrderBy('visibility', 'ASC')
->addOrderBy('editable', 'ASC')
->setParameter('tagids', $tagIds, IQueryBuilder::PARAM_INT_ARRAY);
$result = $query->execute();
while ($row = $result->fetch()) {
$tags[$row['id']] = $this->createSystemTagFromRow($row);
}
$result->closeCursor();
if (count($tags) !== count($tagIds)) {
throw new TagNotFoundException(
'Tag id(s) not found', 0, null, array_diff($tagIds, array_keys($tags))
);
}
return $tags;
}
/**
* {@inheritdoc}
*/
public function getAllTags($visibilityFilter = null, $nameSearchPattern = null) {
$tags = [];
$query = $this->connection->getQueryBuilder();
$query->select('*')
->from(self::TAG_TABLE);
if (!is_null($visibilityFilter)) {
$query->andWhere($query->expr()->eq('visibility', $query->createNamedParameter((int)$visibilityFilter)));
}
if (!empty($nameSearchPattern)) {
$query->andWhere(
$query->expr()->like(
'name',
$query->createNamedParameter('%' . $this->connection->escapeLikeParameter($nameSearchPattern). '%')
)
);
}
$query
->addOrderBy('name', 'ASC')
->addOrderBy('visibility', 'ASC')
->addOrderBy('editable', 'ASC');
$result = $query->execute();
while ($row = $result->fetch()) {
$tags[$row['id']] = $this->createSystemTagFromRow($row);
}
$result->closeCursor();
return $tags;
}
/**
* {@inheritdoc}
*/
public function getTag($tagName, $userVisible, $userAssignable) {
$userVisible = (int)$userVisible;
$userAssignable = (int)$userAssignable;
$result = $this->selectTagQuery
->setParameter('name', $tagName)
->setParameter('visibility', $userVisible)
->setParameter('editable', $userAssignable)
->execute();
$row = $result->fetch();
$result->closeCursor();
if (!$row) {
throw new TagNotFoundException(
'Tag ("' . $tagName . '", '. $userVisible . ', ' . $userAssignable . ') does not exist'
);
}
return $this->createSystemTagFromRow($row);
}
/**
* {@inheritdoc}
*/
public function createTag($tagName, $userVisible, $userAssignable) {
$userVisible = (int)$userVisible;
$userAssignable = (int)$userAssignable;
$query = $this->connection->getQueryBuilder();
$query->insert(self::TAG_TABLE)
->values([
'name' => $query->createNamedParameter($tagName),
'visibility' => $query->createNamedParameter($userVisible),
'editable' => $query->createNamedParameter($userAssignable),
]);
try {
$query->execute();
} catch (UniqueConstraintViolationException $e) {
throw new TagAlreadyExistsException(
'Tag ("' . $tagName . '", '. $userVisible . ', ' . $userAssignable . ') already exists',
0,
$e
);
}
$tagId = $query->getLastInsertId();
$tag = new SystemTag(
(int)$tagId,
$tagName,
(bool)$userVisible,
(bool)$userAssignable
);
$this->dispatcher->dispatch(ManagerEvent::EVENT_CREATE, new ManagerEvent(
ManagerEvent::EVENT_CREATE, $tag
));
return $tag;
}
/**
* {@inheritdoc}
*/
public function updateTag($tagId, $tagName, $userVisible, $userAssignable) {
$userVisible = (int)$userVisible;
$userAssignable = (int)$userAssignable;
try {
$tags = $this->getTagsByIds($tagId);
} catch (TagNotFoundException $e) {
throw new TagNotFoundException(
'Tag does not exist', 0, null, [$tagId]
);
}
$beforeUpdate = array_shift($tags);
$afterUpdate = new SystemTag(
(int) $tagId,
$tagName,
(bool) $userVisible,
(bool) $userAssignable
);
$query = $this->connection->getQueryBuilder();
$query->update(self::TAG_TABLE)
->set('name', $query->createParameter('name'))
->set('visibility', $query->createParameter('visibility'))
->set('editable', $query->createParameter('editable'))
->where($query->expr()->eq('id', $query->createParameter('tagid')))
->setParameter('name', $tagName)
->setParameter('visibility', $userVisible)
->setParameter('editable', $userAssignable)
->setParameter('tagid', $tagId);
try {
if ($query->execute() === 0) {
throw new TagNotFoundException(
'Tag does not exist', 0, null, [$tagId]
);
}
} catch (UniqueConstraintViolationException $e) {
throw new TagAlreadyExistsException(
'Tag ("' . $tagName . '", '. $userVisible . ', ' . $userAssignable . ') already exists',
0,
$e
);
}
$this->dispatcher->dispatch(ManagerEvent::EVENT_UPDATE, new ManagerEvent(
ManagerEvent::EVENT_UPDATE, $afterUpdate, $beforeUpdate
));
}
/**
* {@inheritdoc}
*/
public function deleteTags($tagIds) {
if (!is_array($tagIds)) {
$tagIds = [$tagIds];
}
$tagNotFoundException = null;
$tags = [];
try {
$tags = $this->getTagsByIds($tagIds);
} catch (TagNotFoundException $e) {
$tagNotFoundException = $e;
// Get existing tag objects for the hooks later
$existingTags = array_diff($tagIds, $tagNotFoundException->getMissingTags());
if (!empty($existingTags)) {
try {
$tags = $this->getTagsByIds($existingTags);
} catch (TagNotFoundException $e) {
// Ignore further errors...
}
}
}
// delete relationships first
$query = $this->connection->getQueryBuilder();
$query->delete(SystemTagObjectMapper::RELATION_TABLE)
->where($query->expr()->in('systemtagid', $query->createParameter('tagids')))
->setParameter('tagids', $tagIds, IQueryBuilder::PARAM_INT_ARRAY)
->execute();
$query = $this->connection->getQueryBuilder();
$query->delete(self::TAG_TABLE)
->where($query->expr()->in('id', $query->createParameter('tagids')))
->setParameter('tagids', $tagIds, IQueryBuilder::PARAM_INT_ARRAY)
->execute();
foreach ($tags as $tag) {
$this->dispatcher->dispatch(ManagerEvent::EVENT_DELETE, new ManagerEvent(
ManagerEvent::EVENT_DELETE, $tag
));
}
if ($tagNotFoundException !== null) {
throw new TagNotFoundException(
'Tag id(s) not found', 0, $tagNotFoundException, $tagNotFoundException->getMissingTags()
);
}
}
/**
* {@inheritdoc}
*/
public function canUserAssignTag(ISystemTag $tag, IUser $user) {
// early check to avoid unneeded group lookups
if ($tag->isUserAssignable() && $tag->isUserVisible()) {
return true;
}
if ($this->groupManager->isAdmin($user->getUID())) {
return true;
}
if (!$tag->isUserVisible()) {
return false;
}
$groupIds = $this->groupManager->getUserGroupIds($user);
if (!empty($groupIds)) {
$matchingGroups = array_intersect($groupIds, $this->getTagGroups($tag));
if (!empty($matchingGroups)) {
return true;
}
}
return false;
}
/**
* {@inheritdoc}
*/
public function canUserSeeTag(ISystemTag $tag, IUser $user) {
if ($tag->isUserVisible()) {
return true;
}
if ($this->groupManager->isAdmin($user->getUID())) {
return true;
}
return false;
}
private function createSystemTagFromRow($row) {
return new SystemTag((int)$row['id'], $row['name'], (bool)$row['visibility'], (bool)$row['editable']);
}
/**
* {@inheritdoc}
*/
public function setTagGroups(ISystemTag $tag, $groupIds) {
// delete relationships first
$this->connection->beginTransaction();
try {
$query = $this->connection->getQueryBuilder();
$query->delete(self::TAG_GROUP_TABLE)
->where($query->expr()->eq('systemtagid', $query->createNamedParameter($tag->getId())))
->execute();
// add each group id
$query = $this->connection->getQueryBuilder();
$query->insert(self::TAG_GROUP_TABLE)
->values([
'systemtagid' => $query->createNamedParameter($tag->getId()),
'gid' => $query->createParameter('gid'),
]);
foreach ($groupIds as $groupId) {
if ($groupId === '') {
continue;
}
$query->setParameter('gid', $groupId);
$query->execute();
}
$this->connection->commit();
} catch (\Exception $e) {
$this->connection->rollBack();
throw $e;
}
}
/**
* {@inheritdoc}
*/
public function getTagGroups(ISystemTag $tag) {
$groupIds = [];
$query = $this->connection->getQueryBuilder();
$query->select('gid')
->from(self::TAG_GROUP_TABLE)
->where($query->expr()->eq('systemtagid', $query->createNamedParameter($tag->getId())))
->orderBy('gid');
$result = $query->execute();
while ($row = $result->fetch()) {
$groupIds[] = $row['gid'];
}
$result->closeCursor();
return $groupIds;
}
}