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<?php
/**
* @author Björn Schießle <schiessle@owncloud.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin McCorkell <robin@mccorkell.me.uk>
*
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @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\Share;
class Hooks extends \OC\Share\Constants {
/**
* remember which targets need to be updated in the post addToGroup Hook
* @var array
*/
private static $updateTargets = array();
/**
* Function that is called after a user is deleted. Cleans up the shares of that user.
* @param array $arguments
*/
public static function post_deleteUser($arguments) {
// Delete any items shared with the deleted user
$query = \OC_DB::prepare('DELETE FROM `*PREFIX*share`'
.' WHERE `share_with` = ? AND (`share_type` = ? OR `share_type` = ?)');
$query->execute(array($arguments['uid'], self::SHARE_TYPE_USER, self::$shareTypeGroupUserUnique));
// Delete any items the deleted user shared
$query = \OC_DB::prepare('SELECT `id` FROM `*PREFIX*share` WHERE `uid_owner` = ?');
$result = $query->execute(array($arguments['uid']));
while ($item = $result->fetchRow()) {
Helper::delete($item['id']);
}
}
/**
* Function that is called before a user is added to a group.
* check if we need to create a unique target for the user
* @param array $arguments
*/
public static function pre_addToGroup($arguments) {
$currentUser = \OC::$server->getUserSession()->getUser();
$currentUserID = is_null($currentUser) ? '' : $currentUser->getUID();
// setup filesystem for added user if it isn't the current user
if($currentUserID !== $arguments['uid']) {
\OC_Util::tearDownFS();
\OC_Util::setupFS($arguments['uid']);
}
/** @var \OC\DB\Connection $db */
$db = \OC::$server->getDatabaseConnection();
$insert = $db->createQueryBuilder();
$select = $db->createQueryBuilder();
// Find the group shares and check if the user needs a unique target
$select->select('*')
->from('`*PREFIX*share`')
->where($select->expr()->andX(
$select->expr()->eq('`share_type`', ':shareType'),
$select->expr()->eq('`share_with`', ':shareWith')
))
->setParameter('shareType', self::SHARE_TYPE_GROUP)
->setParameter('shareWith', $arguments['gid']);
$result = $select->execute();
while ($item = $result->fetch()) {
$itemTarget = Helper::generateTarget(
$item['item_type'],
$item['item_source'],
self::SHARE_TYPE_USER,
$arguments['uid'],
$item['uid_owner'],
null,
$item['parent']
);
if ($item['item_type'] === 'file' || $item['item_type'] === 'folder') {
$fileTarget = Helper::generateTarget(
$item['item_type'],
$item['file_target'],
self::SHARE_TYPE_USER,
$arguments['uid'],
$item['uid_owner'],
null,
$item['parent']
);
} else {
$fileTarget = null;
}
// Insert an extra row for the group share if the item or file target is unique for this user
if (
($fileTarget === null && $itemTarget != $item['item_target'])
|| ($fileTarget !== null && $fileTarget !== $item['file_target'])
) {
self::$updateTargets[$arguments['gid']][] = [
'`item_type`' => $insert->expr()->literal($item['item_type']),
'`item_source`' => $insert->expr()->literal($item['item_source']),
'`item_target`' => $insert->expr()->literal($itemTarget),
'`file_target`' => $insert->expr()->literal($fileTarget),
'`parent`' => $insert->expr()->literal($item['id']),
'`share_type`' => $insert->expr()->literal(self::$shareTypeGroupUserUnique),
'`share_with`' => $insert->expr()->literal($arguments['uid']),
'`uid_owner`' => $insert->expr()->literal($item['uid_owner']),
'`permissions`' => $insert->expr()->literal($item['permissions']),
'`stime`' => $insert->expr()->literal($item['stime']),
'`file_source`' => $insert->expr()->literal($item['file_source']),
];
}
}
// re-setup old filesystem state
if($currentUserID !== $arguments['uid']) {
\OC_Util::tearDownFS();
if($currentUserID !== '') {
\OC_Util::setupFS($currentUserID);
}
}
}
/**
* Function that is called after a user is added to a group.
* add unique target for the user if needed
* @param array $arguments
*/
public static function post_addToGroup($arguments) {
/** @var \OC\DB\Connection $db */
$db = \OC::$server->getDatabaseConnection();
$insert = $db->createQueryBuilder();
$insert->insert('`*PREFIX*share`');
if (isset(self::$updateTargets[$arguments['gid']])) {
foreach (self::$updateTargets[$arguments['gid']] as $newTarget) {
$insert->values($newTarget);
$insert->execute();
}
unset(self::$updateTargets[$arguments['gid']]);
}
}
/**
* Function that is called after a user is removed from a group. Shares are cleaned up.
* @param array $arguments
*/
public static function post_removeFromGroup($arguments) {
$sql = 'SELECT `id`, `share_type` FROM `*PREFIX*share`'
.' WHERE (`share_type` = ? AND `share_with` = ?) OR (`share_type` = ? AND `share_with` = ?)';
$result = \OC_DB::executeAudited($sql, array(self::SHARE_TYPE_GROUP, $arguments['gid'],
self::$shareTypeGroupUserUnique, $arguments['uid']));
while ($item = $result->fetchRow()) {
if ($item['share_type'] == self::SHARE_TYPE_GROUP) {
// Delete all reshares by this user of the group share
Helper::delete($item['id'], true, $arguments['uid']);
} else {
Helper::delete($item['id']);
}
}
}
/**
* Function that is called after a group is removed. Cleans up the shares to that group.
* @param array $arguments
*/
public static function post_deleteGroup($arguments) {
$sql = 'SELECT `id` FROM `*PREFIX*share` WHERE `share_type` = ? AND `share_with` = ?';
$result = \OC_DB::executeAudited($sql, array(self::SHARE_TYPE_GROUP, $arguments['gid']));
while ($item = $result->fetchRow()) {
Helper::delete($item['id']);
}
}
}
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