1541 lines
60 KiB
PHP
1541 lines
60 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Michael Gapczynski
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* @copyright 2012 Michael Gapczynski mtgap@owncloud.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace OCP;
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/**
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* This class provides the ability for apps to share their content between users.
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* Apps must create a backend class that implements OCP\Share_Backend and register it with this class.
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*
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* It provides the following hooks:
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* - post_shared
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*/
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class Share {
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const SHARE_TYPE_USER = 0;
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const SHARE_TYPE_GROUP = 1;
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const SHARE_TYPE_LINK = 3;
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const SHARE_TYPE_EMAIL = 4;
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const SHARE_TYPE_CONTACT = 5;
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const SHARE_TYPE_REMOTE = 6;
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/** CRUDS permissions (Create, Read, Update, Delete, Share) using a bitmask
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* Construct permissions for share() and setPermissions with Or (|) e.g.
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* Give user read and update permissions: PERMISSION_READ | PERMISSION_UPDATE
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*
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* Check if permission is granted with And (&) e.g. Check if delete is
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* granted: if ($permissions & PERMISSION_DELETE)
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*
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* Remove permissions with And (&) and Not (~) e.g. Remove the update
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* permission: $permissions &= ~PERMISSION_UPDATE
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*
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* Apps are required to handle permissions on their own, this class only
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* stores and manages the permissions of shares
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* @see lib/public/constants.php
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*/
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const FORMAT_NONE = -1;
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const FORMAT_STATUSES = -2;
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const FORMAT_SOURCES = -3;
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const TOKEN_LENGTH = 32; // see db_structure.xml
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private static $shareTypeUserAndGroups = -1;
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private static $shareTypeGroupUserUnique = 2;
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private static $backends = array();
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private static $backendTypes = array();
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private static $isResharingAllowed;
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/**
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* @brief Register a sharing backend class that implements OCP\Share_Backend for an item type
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* @param string Item type
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* @param string Backend class
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* @param string (optional) Depends on item type
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* @param array (optional) List of supported file extensions if this item type depends on files
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* @return Returns true if backend is registered or false if error
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*/
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public static function registerBackend($itemType, $class, $collectionOf = null, $supportedFileExtensions = null) {
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if (self::isEnabled()) {
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if (!isset(self::$backendTypes[$itemType])) {
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self::$backendTypes[$itemType] = array(
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'class' => $class,
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'collectionOf' => $collectionOf,
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'supportedFileExtensions' => $supportedFileExtensions
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);
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if(count(self::$backendTypes) === 1) {
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\OC_Util::addScript('core', 'share');
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\OC_Util::addStyle('core', 'share');
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}
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return true;
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}
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\OC_Log::write('OCP\Share',
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'Sharing backend '.$class.' not registered, '.self::$backendTypes[$itemType]['class']
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.' is already registered for '.$itemType,
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\OC_Log::WARN);
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}
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return false;
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}
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/**
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* @brief Check if the Share API is enabled
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* @return Returns true if enabled or false
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*
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* The Share API is enabled by default if not configured
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*
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*/
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public static function isEnabled() {
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if (\OC_Appconfig::getValue('core', 'shareapi_enabled', 'yes') == 'yes') {
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return true;
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}
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return false;
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}
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/**
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* @brief Get the items of item type shared with the current user
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* @param string Item type
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* @param int Format (optional) Format type must be defined by the backend
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* @param int Number of items to return (optional) Returns all by default
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* @return Return depends on format
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*/
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public static function getItemsSharedWith($itemType, $format = self::FORMAT_NONE,
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$parameters = null, $limit = -1, $includeCollections = false) {
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return self::getItems($itemType, null, self::$shareTypeUserAndGroups, \OC_User::getUser(), null, $format,
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$parameters, $limit, $includeCollections);
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}
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/**
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* @brief Get the item of item type shared with the current user
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* @param string Item type
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* @param string Item target
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* @param int Format (optional) Format type must be defined by the backend
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* @return Return depends on format
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*/
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public static function getItemSharedWith($itemType, $itemTarget, $format = self::FORMAT_NONE,
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$parameters = null, $includeCollections = false) {
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return self::getItems($itemType, $itemTarget, self::$shareTypeUserAndGroups, \OC_User::getUser(), null, $format,
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$parameters, 1, $includeCollections);
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}
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/**
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* @brief Get the item of item type shared with the current user by source
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* @param string Item type
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* @param string Item source
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* @param int Format (optional) Format type must be defined by the backend
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* @return Return depends on format
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*/
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public static function getItemSharedWithBySource($itemType, $itemSource, $format = self::FORMAT_NONE,
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$parameters = null, $includeCollections = false) {
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return self::getItems($itemType, $itemSource, self::$shareTypeUserAndGroups, \OC_User::getUser(), null, $format,
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$parameters, 1, $includeCollections, true);
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}
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/**
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* @brief Get the item of item type shared by a link
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* @param string Item type
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* @param string Item source
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* @param string Owner of link
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* @return Item
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*/
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public static function getItemSharedWithByLink($itemType, $itemSource, $uidOwner) {
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return self::getItems($itemType, $itemSource, self::SHARE_TYPE_LINK, null, $uidOwner, self::FORMAT_NONE,
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null, 1);
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}
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/**
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* @brief Get the item shared by a token
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* @param string token
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* @return Item
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*/
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public static function getShareByToken($token) {
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$query = \OC_DB::prepare('SELECT * FROM `*PREFIX*share` WHERE `token` = ?', 1);
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$result = $query->execute(array($token));
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if (\OC_DB::isError($result)) {
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\OC_Log::write('OCP\Share', \OC_DB::getErrorMessage($result) . ', token=' . $token, \OC_Log::ERROR);
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}
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return $result->fetchRow();
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}
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/**
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* @brief Get the shared items of item type owned by the current user
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* @param string Item type
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* @param int Format (optional) Format type must be defined by the backend
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* @param int Number of items to return (optional) Returns all by default
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* @return Return depends on format
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*/
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public static function getItemsShared($itemType, $format = self::FORMAT_NONE, $parameters = null,
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$limit = -1, $includeCollections = false) {
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return self::getItems($itemType, null, null, null, \OC_User::getUser(), $format,
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$parameters, $limit, $includeCollections);
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}
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/**
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* @brief Get the shared item of item type owned by the current user
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* @param string Item type
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* @param string Item source
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* @param int Format (optional) Format type must be defined by the backend
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* @return Return depends on format
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*/
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public static function getItemShared($itemType, $itemSource, $format = self::FORMAT_NONE,
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$parameters = null, $includeCollections = false) {
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return self::getItems($itemType, $itemSource, null, null, \OC_User::getUser(), $format,
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$parameters, -1, $includeCollections);
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}
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/**
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* Get all users an item is shared with
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* @param string Item type
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* @param string Item source
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* @param string Owner
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* @param bool Include collections
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* @return Return array of users
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*/
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public static function getUsersItemShared($itemType, $itemSource, $uidOwner, $includeCollections = false) {
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$users = array();
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$items = self::getItems($itemType, $itemSource, null, null, $uidOwner, self::FORMAT_NONE, null, -1, $includeCollections);
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if ($items) {
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foreach ($items as $item) {
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if ((int)$item['share_type'] === self::SHARE_TYPE_USER) {
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$users[] = $item['share_with'];
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} else if ((int)$item['share_type'] === self::SHARE_TYPE_GROUP) {
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$users = array_merge($users, \OC_Group::usersInGroup($item['share_with']));
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}
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}
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}
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return $users;
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}
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/**
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* @brief Share an item with a user, group, or via private link
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* @param string Item type
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* @param string Item source
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* @param int SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
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* @param string User or group the item is being shared with
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* @param int CRUDS permissions
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* @return bool|string Returns true on success or false on failure, Returns token on success for links
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*/
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public static function shareItem($itemType, $itemSource, $shareType, $shareWith, $permissions) {
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$uidOwner = \OC_User::getUser();
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$sharingPolicy = \OC_Appconfig::getValue('core', 'shareapi_share_policy', 'global');
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// Verify share type and sharing conditions are met
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if ($shareType === self::SHARE_TYPE_USER) {
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if ($shareWith == $uidOwner) {
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$message = 'Sharing '.$itemSource.' failed, because the user '.$shareWith.' is the item owner';
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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if (!\OC_User::userExists($shareWith)) {
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$message = 'Sharing '.$itemSource.' failed, because the user '.$shareWith.' does not exist';
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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if ($sharingPolicy == 'groups_only') {
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$inGroup = array_intersect(\OC_Group::getUserGroups($uidOwner), \OC_Group::getUserGroups($shareWith));
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if (empty($inGroup)) {
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$message = 'Sharing '.$itemSource.' failed, because the user '
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.$shareWith.' is not a member of any groups that '.$uidOwner.' is a member of';
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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}
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// Check if the item source is already shared with the user, either from the same owner or a different user
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if ($checkExists = self::getItems($itemType, $itemSource, self::$shareTypeUserAndGroups,
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$shareWith, null, self::FORMAT_NONE, null, 1, true, true)) {
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// Only allow the same share to occur again if it is the same
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// owner and is not a user share, this use case is for increasing
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// permissions for a specific user
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if ($checkExists['uid_owner'] != $uidOwner || $checkExists['share_type'] == $shareType) {
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$message = 'Sharing '.$itemSource.' failed, because this item is already shared with '.$shareWith;
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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}
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} else if ($shareType === self::SHARE_TYPE_GROUP) {
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if (!\OC_Group::groupExists($shareWith)) {
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$message = 'Sharing '.$itemSource.' failed, because the group '.$shareWith.' does not exist';
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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if ($sharingPolicy == 'groups_only' && !\OC_Group::inGroup($uidOwner, $shareWith)) {
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$message = 'Sharing '.$itemSource.' failed, because '
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.$uidOwner.' is not a member of the group '.$shareWith;
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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// Check if the item source is already shared with the group, either from the same owner or a different user
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// The check for each user in the group is done inside the put() function
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if ($checkExists = self::getItems($itemType, $itemSource, self::SHARE_TYPE_GROUP, $shareWith,
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null, self::FORMAT_NONE, null, 1, true, true)) {
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// Only allow the same share to occur again if it is the same
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// owner and is not a group share, this use case is for increasing
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// permissions for a specific user
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if ($checkExists['uid_owner'] != $uidOwner || $checkExists['share_type'] == $shareType) {
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$message = 'Sharing '.$itemSource.' failed, because this item is already shared with '.$shareWith;
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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}
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// Convert share with into an array with the keys group and users
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$group = $shareWith;
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$shareWith = array();
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$shareWith['group'] = $group;
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$shareWith['users'] = array_diff(\OC_Group::usersInGroup($group), array($uidOwner));
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} else if ($shareType === self::SHARE_TYPE_LINK) {
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if (\OC_Appconfig::getValue('core', 'shareapi_allow_links', 'yes') == 'yes') {
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// when updating a link share
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if ($checkExists = self::getItems($itemType, $itemSource, self::SHARE_TYPE_LINK, null,
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$uidOwner, self::FORMAT_NONE, null, 1)) {
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// remember old token
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$oldToken = $checkExists['token'];
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//delete the old share
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self::delete($checkExists['id']);
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}
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// Generate hash of password - same method as user passwords
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if (isset($shareWith)) {
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$forcePortable = (CRYPT_BLOWFISH != 1);
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$hasher = new \PasswordHash(8, $forcePortable);
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$shareWith = $hasher->HashPassword($shareWith.\OC_Config::getValue('passwordsalt', ''));
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}
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// Generate token
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if (isset($oldToken)) {
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$token = $oldToken;
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} else {
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$token = \OC_Util::generate_random_bytes(self::TOKEN_LENGTH);
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}
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$result = self::put($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions,
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null, $token);
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if ($result) {
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return $token;
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} else {
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return false;
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}
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}
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$message = 'Sharing '.$itemSource.' failed, because sharing with links is not allowed';
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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return false;
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// } else if ($shareType === self::SHARE_TYPE_CONTACT) {
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// if (!\OC_App::isEnabled('contacts')) {
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// $message = 'Sharing '.$itemSource.' failed, because the contacts app is not enabled';
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// \OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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// return false;
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// }
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// $vcard = \OC_Contacts_App::getContactVCard($shareWith);
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// if (!isset($vcard)) {
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// $message = 'Sharing '.$itemSource.' failed, because the contact does not exist';
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// \OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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// throw new \Exception($message);
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// }
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// $details = \OC_Contacts_VCard::structureContact($vcard);
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// // TODO Add ownCloud user to contacts vcard
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// if (!isset($details['EMAIL'])) {
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// $message = 'Sharing '.$itemSource.' failed, because no email address is associated with the contact';
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// \OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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// throw new \Exception($message);
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// }
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// return self::shareItem($itemType, $itemSource, self::SHARE_TYPE_EMAIL, $details['EMAIL'], $permissions);
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} else {
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// Future share types need to include their own conditions
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$message = 'Share type '.$shareType.' is not valid for '.$itemSource;
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\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
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throw new \Exception($message);
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}
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// If the item is a folder, scan through the folder looking for equivalent item types
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// if ($itemType == 'folder') {
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// $parentFolder = self::put('folder', $itemSource, $shareType, $shareWith, $uidOwner, $permissions, true);
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// if ($parentFolder && $files = \OC\Files\Filesystem::getDirectoryContent($itemSource)) {
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// for ($i = 0; $i < count($files); $i++) {
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// $name = substr($files[$i]['name'], strpos($files[$i]['name'], $itemSource) - strlen($itemSource));
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// if ($files[$i]['mimetype'] == 'httpd/unix-directory'
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// && $children = \OC\Files\Filesystem::getDirectoryContent($name, '/')
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// ) {
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// // Continue scanning into child folders
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// array_push($files, $children);
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// } else {
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// // Check file extension for an equivalent item type to convert to
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// $extension = strtolower(substr($itemSource, strrpos($itemSource, '.') + 1));
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// foreach (self::$backends as $type => $backend) {
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// if (isset($backend->dependsOn) && $backend->dependsOn == 'file' && isset($backend->supportedFileExtensions) && in_array($extension, $backend->supportedFileExtensions)) {
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// $itemType = $type;
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// break;
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// }
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// }
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// // Pass on to put() to check if this item should be converted, the item won't be inserted into the database unless it can be converted
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// self::put($itemType, $name, $shareType, $shareWith, $uidOwner, $permissions, $parentFolder);
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// }
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// }
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// return true;
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// }
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// return false;
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// } else {
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// Put the item into the database
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return self::put($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions);
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// }
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}
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/**
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* @brief Unshare an item from a user, group, or delete a private link
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* @param string Item type
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* @param string Item source
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* @param int SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
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* @param string User or group the item is being shared with
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* @return Returns true on success or false on failure
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*/
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public static function unshare($itemType, $itemSource, $shareType, $shareWith) {
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if ($item = self::getItems($itemType, $itemSource, $shareType, $shareWith, \OC_User::getUser(),
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self::FORMAT_NONE, null, 1)) {
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// Pass all the vars we have for now, they may be useful
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\OC_Hook::emit('OCP\Share', 'pre_unshare', array(
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'itemType' => $itemType,
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'itemSource' => $itemSource,
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'fileSource' => $item['file_source'],
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'shareType' => $shareType,
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'shareWith' => $shareWith,
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));
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self::delete($item['id']);
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return true;
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}
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return false;
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}
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/**
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* @brief Unshare an item from all users, groups, and remove all links
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* @param string Item type
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* @param string Item source
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* @return Returns true on success or false on failure
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*/
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public static function unshareAll($itemType, $itemSource) {
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if ($shares = self::getItemShared($itemType, $itemSource)) {
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// Pass all the vars we have for now, they may be useful
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\OC_Hook::emit('OCP\Share', 'pre_unshareAll', array(
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'itemType' => $itemType,
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'itemSource' => $itemSource,
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'shares' => $shares
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));
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foreach ($shares as $share) {
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self::delete($share['id']);
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}
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return true;
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}
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return false;
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}
|
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|
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/**
|
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* @brief Unshare an item shared with the current user
|
|
* @param string Item type
|
|
* @param string Item target
|
|
* @return Returns true on success or false on failure
|
|
*
|
|
* Unsharing from self is not allowed for items inside collections
|
|
*
|
|
*/
|
|
public static function unshareFromSelf($itemType, $itemTarget) {
|
|
if ($item = self::getItemSharedWith($itemType, $itemTarget)) {
|
|
if ((int)$item['share_type'] === self::SHARE_TYPE_GROUP) {
|
|
// Insert an extra row for the group share and set permission
|
|
// to 0 to prevent it from showing up for the user
|
|
$query = \OC_DB::prepare('INSERT INTO `*PREFIX*share`'
|
|
.' (`item_type`, `item_source`, `item_target`, `parent`, `share_type`,'
|
|
.' `share_with`, `uid_owner`, `permissions`, `stime`, `file_source`, `file_target`)'
|
|
.' VALUES (?,?,?,?,?,?,?,?,?,?,?)');
|
|
$query->execute(array($item['item_type'], $item['item_source'], $item['item_target'],
|
|
$item['id'], self::$shareTypeGroupUserUnique,
|
|
\OC_User::getUser(), $item['uid_owner'], 0, $item['stime'], $item['file_source'],
|
|
$item['file_target']));
|
|
\OC_DB::insertid('*PREFIX*share');
|
|
// Delete all reshares by this user of the group share
|
|
self::delete($item['id'], true, \OC_User::getUser());
|
|
} else if ((int)$item['share_type'] === self::$shareTypeGroupUserUnique) {
|
|
// Set permission to 0 to prevent it from showing up for the user
|
|
$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `permissions` = ? WHERE `id` = ?');
|
|
$query->execute(array(0, $item['id']));
|
|
self::delete($item['id'], true);
|
|
} else {
|
|
self::delete($item['id']);
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief Set the permissions of an item for a specific user or group
|
|
* @param string Item type
|
|
* @param string Item source
|
|
* @param int SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
|
|
* @param string User or group the item is being shared with
|
|
* @param int CRUDS permissions
|
|
* @return Returns true on success or false on failure
|
|
*/
|
|
public static function setPermissions($itemType, $itemSource, $shareType, $shareWith, $permissions) {
|
|
if ($item = self::getItems($itemType, $itemSource, $shareType, $shareWith,
|
|
\OC_User::getUser(), self::FORMAT_NONE, null, 1, false)) {
|
|
// Check if this item is a reshare and verify that the permissions
|
|
// granted don't exceed the parent shared item
|
|
if (isset($item['parent'])) {
|
|
$query = \OC_DB::prepare('SELECT `permissions` FROM `*PREFIX*share` WHERE `id` = ?', 1);
|
|
$result = $query->execute(array($item['parent']))->fetchRow();
|
|
if (~(int)$result['permissions'] & $permissions) {
|
|
$message = 'Setting permissions for '.$itemSource.' failed,'
|
|
.' because the permissions exceed permissions granted to '.\OC_User::getUser();
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
}
|
|
$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `permissions` = ? WHERE `id` = ?');
|
|
$query->execute(array($permissions, $item['id']));
|
|
// Check if permissions were removed
|
|
if ($item['permissions'] & ~$permissions) {
|
|
// If share permission is removed all reshares must be deleted
|
|
if (($item['permissions'] & PERMISSION_SHARE) && (~$permissions & PERMISSION_SHARE)) {
|
|
self::delete($item['id'], true);
|
|
} else {
|
|
$ids = array();
|
|
$parents = array($item['id']);
|
|
while (!empty($parents)) {
|
|
$parents = "'".implode("','", $parents)."'";
|
|
$query = \OC_DB::prepare('SELECT `id`, `permissions` FROM `*PREFIX*share`'
|
|
.' WHERE `parent` IN ('.$parents.')');
|
|
$result = $query->execute();
|
|
// Reset parents array, only go through loop again if
|
|
// items are found that need permissions removed
|
|
$parents = array();
|
|
while ($item = $result->fetchRow()) {
|
|
// Check if permissions need to be removed
|
|
if ($item['permissions'] & ~$permissions) {
|
|
// Add to list of items that need permissions removed
|
|
$ids[] = $item['id'];
|
|
$parents[] = $item['id'];
|
|
}
|
|
}
|
|
}
|
|
// Remove the permissions for all reshares of this item
|
|
if (!empty($ids)) {
|
|
$ids = "'".implode("','", $ids)."'";
|
|
$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `permissions` = `permissions` & ?'
|
|
.' WHERE `id` IN ('.$ids.')');
|
|
$query->execute(array($permissions));
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
$message = 'Setting permissions for '.$itemSource.' failed, because the item was not found';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
|
|
public static function setExpirationDate($itemType, $itemSource, $date) {
|
|
if ($items = self::getItems($itemType, $itemSource, null, null, \OC_User::getUser(),
|
|
self::FORMAT_NONE, null, -1, false)) {
|
|
if (!empty($items)) {
|
|
if ($date == '') {
|
|
$date = null;
|
|
} else {
|
|
$date = new \DateTime($date);
|
|
$date = date('Y-m-d H:i', $date->format('U') - $date->getOffset());
|
|
}
|
|
$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `expiration` = ? WHERE `id` = ?');
|
|
foreach ($items as $item) {
|
|
$query->execute(array($date, $item['id']));
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief Get the backend class for the specified item type
|
|
* @param string Item type
|
|
* @return Sharing backend object
|
|
*/
|
|
private static function getBackend($itemType) {
|
|
if (isset(self::$backends[$itemType])) {
|
|
return self::$backends[$itemType];
|
|
} else if (isset(self::$backendTypes[$itemType]['class'])) {
|
|
$class = self::$backendTypes[$itemType]['class'];
|
|
if (class_exists($class)) {
|
|
self::$backends[$itemType] = new $class;
|
|
if (!(self::$backends[$itemType] instanceof Share_Backend)) {
|
|
$message = 'Sharing backend '.$class.' must implement the interface OCP\Share_Backend';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
return self::$backends[$itemType];
|
|
} else {
|
|
$message = 'Sharing backend '.$class.' not found';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
}
|
|
$message = 'Sharing backend for '.$itemType.' not found';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
|
|
/**
|
|
* @brief Check if resharing is allowed
|
|
* @return Returns true if allowed or false
|
|
*
|
|
* Resharing is allowed by default if not configured
|
|
*
|
|
*/
|
|
private static function isResharingAllowed() {
|
|
if (!isset(self::$isResharingAllowed)) {
|
|
if (\OC_Appconfig::getValue('core', 'shareapi_allow_resharing', 'yes') == 'yes') {
|
|
self::$isResharingAllowed = true;
|
|
} else {
|
|
self::$isResharingAllowed = false;
|
|
}
|
|
}
|
|
return self::$isResharingAllowed;
|
|
}
|
|
|
|
/**
|
|
* @brief Get a list of collection item types for the specified item type
|
|
* @param string Item type
|
|
* @return array
|
|
*/
|
|
private static function getCollectionItemTypes($itemType) {
|
|
$collectionTypes = array($itemType);
|
|
foreach (self::$backendTypes as $type => $backend) {
|
|
if (in_array($backend['collectionOf'], $collectionTypes)) {
|
|
$collectionTypes[] = $type;
|
|
}
|
|
}
|
|
// TODO Add option for collections to be collection of themselves, only 'folder' does it now...
|
|
if (!self::getBackend($itemType) instanceof Share_Backend_Collection || $itemType != 'folder') {
|
|
unset($collectionTypes[0]);
|
|
}
|
|
// Return array if collections were found or the item type is a
|
|
// collection itself - collections can be inside collections
|
|
if (count($collectionTypes) > 0) {
|
|
return $collectionTypes;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief Get shared items from the database
|
|
* @param string Item type
|
|
* @param string Item source or target (optional)
|
|
* @param int SHARE_TYPE_USER, SHARE_TYPE_GROUP, SHARE_TYPE_LINK, $shareTypeUserAndGroups, or $shareTypeGroupUserUnique
|
|
* @param string User or group the item is being shared with
|
|
* @param string User that is the owner of shared items (optional)
|
|
* @param int Format to convert items to with formatItems()
|
|
* @param mixed Parameters to pass to formatItems()
|
|
* @param int Number of items to return, -1 to return all matches (optional)
|
|
* @param bool Include collection item types (optional)
|
|
* @return mixed
|
|
*
|
|
* See public functions getItem(s)... for parameter usage
|
|
*
|
|
*/
|
|
private static function getItems($itemType, $item = null, $shareType = null, $shareWith = null,
|
|
$uidOwner = null, $format = self::FORMAT_NONE, $parameters = null, $limit = -1,
|
|
$includeCollections = false, $itemShareWithBySource = false) {
|
|
if (!self::isEnabled()) {
|
|
if ($limit == 1 || (isset($uidOwner) && isset($item))) {
|
|
return false;
|
|
} else {
|
|
return array();
|
|
}
|
|
}
|
|
$backend = self::getBackend($itemType);
|
|
$collectionTypes = false;
|
|
// Get filesystem root to add it to the file target and remove from the
|
|
// file source, match file_source with the file cache
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$root = \OC\Files\Filesystem::getRoot();
|
|
$where = 'INNER JOIN `*PREFIX*filecache` ON `file_source` = `*PREFIX*filecache`.`fileid`';
|
|
if (!isset($item)) {
|
|
$where .= ' WHERE `file_target` IS NOT NULL';
|
|
}
|
|
$fileDependent = true;
|
|
$queryArgs = array();
|
|
} else {
|
|
$fileDependent = false;
|
|
$root = '';
|
|
if ($includeCollections && !isset($item) && ($collectionTypes = self::getCollectionItemTypes($itemType))) {
|
|
// If includeCollections is true, find collections of this item type, e.g. a music album contains songs
|
|
if (!in_array($itemType, $collectionTypes)) {
|
|
$itemTypes = array_merge(array($itemType), $collectionTypes);
|
|
} else {
|
|
$itemTypes = $collectionTypes;
|
|
}
|
|
$placeholders = join(',', array_fill(0, count($itemTypes), '?'));
|
|
$where = ' WHERE `item_type` IN ('.$placeholders.'))';
|
|
$queryArgs = $itemTypes;
|
|
} else {
|
|
$where = ' WHERE `item_type` = ?';
|
|
$queryArgs = array($itemType);
|
|
}
|
|
}
|
|
if (isset($shareType)) {
|
|
// Include all user and group items
|
|
if ($shareType == self::$shareTypeUserAndGroups && isset($shareWith)) {
|
|
$where .= ' AND `share_type` IN (?,?,?)';
|
|
$queryArgs[] = self::SHARE_TYPE_USER;
|
|
$queryArgs[] = self::SHARE_TYPE_GROUP;
|
|
$queryArgs[] = self::$shareTypeGroupUserUnique;
|
|
$userAndGroups = array_merge(array($shareWith), \OC_Group::getUserGroups($shareWith));
|
|
$placeholders = join(',', array_fill(0, count($userAndGroups), '?'));
|
|
$where .= ' AND `share_with` IN ('.$placeholders.')';
|
|
$queryArgs = array_merge($queryArgs, $userAndGroups);
|
|
// Don't include own group shares
|
|
$where .= ' AND `uid_owner` != ?';
|
|
$queryArgs[] = $shareWith;
|
|
} else {
|
|
$where .= ' AND `share_type` = ?';
|
|
$queryArgs[] = $shareType;
|
|
if (isset($shareWith)) {
|
|
$where .= ' AND `share_with` = ?';
|
|
$queryArgs[] = $shareWith;
|
|
}
|
|
}
|
|
}
|
|
if (isset($uidOwner)) {
|
|
$where .= ' AND `uid_owner` = ?';
|
|
$queryArgs[] = $uidOwner;
|
|
if (!isset($shareType)) {
|
|
// Prevent unique user targets for group shares from being selected
|
|
$where .= ' AND `share_type` != ?';
|
|
$queryArgs[] = self::$shareTypeGroupUserUnique;
|
|
}
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$column = 'file_source';
|
|
} else {
|
|
$column = 'item_source';
|
|
}
|
|
} else {
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$column = 'file_target';
|
|
} else {
|
|
$column = 'item_target';
|
|
}
|
|
}
|
|
if (isset($item)) {
|
|
if ($includeCollections && $collectionTypes = self::getCollectionItemTypes($itemType)) {
|
|
$where .= ' AND (';
|
|
} else {
|
|
$where .= ' AND';
|
|
}
|
|
// If looking for own shared items, check item_source else check item_target
|
|
if (isset($uidOwner) || $itemShareWithBySource) {
|
|
// If item type is a file, file source needs to be checked in case the item was converted
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$where .= ' `file_source` = ?';
|
|
$column = 'file_source';
|
|
} else {
|
|
$where .= ' `item_source` = ?';
|
|
$column = 'item_source';
|
|
}
|
|
} else {
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$where .= ' `file_target` = ?';
|
|
$item = \OC\Files\Filesystem::normalizePath($item);
|
|
} else {
|
|
$where .= ' `item_target` = ?';
|
|
}
|
|
}
|
|
$queryArgs[] = $item;
|
|
if ($includeCollections && $collectionTypes) {
|
|
$placeholders = join(',', array_fill(0, count($collectionTypes), '?'));
|
|
$where .= ' OR `item_type` IN ('.$placeholders.'))';
|
|
$queryArgs = array_merge($queryArgs, $collectionTypes);
|
|
}
|
|
}
|
|
if ($limit != -1 && !$includeCollections) {
|
|
if ($shareType == self::$shareTypeUserAndGroups) {
|
|
// Make sure the unique user target is returned if it exists,
|
|
// unique targets should follow the group share in the database
|
|
// If the limit is not 1, the filtering can be done later
|
|
$where .= ' ORDER BY `*PREFIX*share`.`id` DESC';
|
|
}
|
|
// The limit must be at least 3, because filtering needs to be done
|
|
if ($limit < 3) {
|
|
$queryLimit = 3;
|
|
} else {
|
|
$queryLimit = $limit;
|
|
}
|
|
} else {
|
|
$queryLimit = null;
|
|
}
|
|
// TODO Optimize selects
|
|
if ($format == self::FORMAT_STATUSES) {
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$select = '`*PREFIX*share`.`id`, `item_type`, `*PREFIX*share`.`parent`,'
|
|
.' `share_type`, `file_source`, `path`, `expiration`, `storage`';
|
|
} else {
|
|
$select = '`id`, `item_type`, `item_source`, `parent`, `share_type`, `expiration`';
|
|
}
|
|
} else {
|
|
if (isset($uidOwner)) {
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$select = '`*PREFIX*share`.`id`, `item_type`, `*PREFIX*share`.`parent`,'
|
|
.' `share_type`, `share_with`, `file_source`, `path`, `permissions`, `stime`,'
|
|
.' `expiration`, `token`, `storage`';
|
|
} else {
|
|
$select = '`id`, `item_type`, `item_source`, `parent`, `share_type`, `share_with`, `permissions`,'
|
|
.' `stime`, `file_source`, `expiration`, `token`';
|
|
}
|
|
} else {
|
|
if ($fileDependent) {
|
|
if (($itemType == 'file' || $itemType == 'folder')
|
|
&& $format == \OC_Share_Backend_File::FORMAT_GET_FOLDER_CONTENTS
|
|
|| $format == \OC_Share_Backend_File::FORMAT_FILE_APP_ROOT
|
|
) {
|
|
$select = '`*PREFIX*share`.`id`, `item_type`, `*PREFIX*share`.`parent`, `uid_owner`, '
|
|
.'`share_type`, `share_with`, `file_source`, `path`, `file_target`, '
|
|
.'`permissions`, `expiration`, `storage`, `*PREFIX*filecache`.`parent` as `file_parent`, '
|
|
.'`name`, `mtime`, `mimetype`, `mimepart`, `size`, `encrypted`, `etag`';
|
|
} else {
|
|
$select = '`*PREFIX*share`.`id`, `item_type`, `item_source`, `item_target`,
|
|
`*PREFIX*share`.`parent`, `share_type`, `share_with`, `uid_owner`,
|
|
`file_source`, `path`, `file_target`, `permissions`, `stime`, `expiration`, `token`, `storage`';
|
|
}
|
|
} else {
|
|
$select = '*';
|
|
}
|
|
}
|
|
}
|
|
$root = strlen($root);
|
|
$query = \OC_DB::prepare('SELECT '.$select.' FROM `*PREFIX*share` '.$where, $queryLimit);
|
|
$result = $query->execute($queryArgs);
|
|
if (\OC_DB::isError($result)) {
|
|
\OC_Log::write('OCP\Share',
|
|
\OC_DB::getErrorMessage($result) . ', select=' . $select . ' where=' . $where,
|
|
\OC_Log::ERROR);
|
|
}
|
|
$items = array();
|
|
$targets = array();
|
|
$switchedItems = array();
|
|
$mounts = array();
|
|
while ($row = $result->fetchRow()) {
|
|
// Filter out duplicate group shares for users with unique targets
|
|
if ($row['share_type'] == self::$shareTypeGroupUserUnique && isset($items[$row['parent']])) {
|
|
$row['share_type'] = self::SHARE_TYPE_GROUP;
|
|
$row['share_with'] = $items[$row['parent']]['share_with'];
|
|
// Remove the parent group share
|
|
unset($items[$row['parent']]);
|
|
if ($row['permissions'] == 0) {
|
|
continue;
|
|
}
|
|
} else if (!isset($uidOwner)) {
|
|
// Check if the same target already exists
|
|
if (isset($targets[$row[$column]])) {
|
|
// Check if the same owner shared with the user twice
|
|
// through a group and user share - this is allowed
|
|
$id = $targets[$row[$column]];
|
|
if ($items[$id]['uid_owner'] == $row['uid_owner']) {
|
|
// Switch to group share type to ensure resharing conditions aren't bypassed
|
|
if ($items[$id]['share_type'] != self::SHARE_TYPE_GROUP) {
|
|
$items[$id]['share_type'] = self::SHARE_TYPE_GROUP;
|
|
$items[$id]['share_with'] = $row['share_with'];
|
|
}
|
|
// Switch ids if sharing permission is granted on only
|
|
// one share to ensure correct parent is used if resharing
|
|
if (~(int)$items[$id]['permissions'] & PERMISSION_SHARE
|
|
&& (int)$row['permissions'] & PERMISSION_SHARE) {
|
|
$items[$row['id']] = $items[$id];
|
|
$switchedItems[$id] = $row['id'];
|
|
unset($items[$id]);
|
|
$id = $row['id'];
|
|
}
|
|
// Combine the permissions for the item
|
|
$items[$id]['permissions'] |= (int)$row['permissions'];
|
|
continue;
|
|
}
|
|
} else {
|
|
$targets[$row[$column]] = $row['id'];
|
|
}
|
|
}
|
|
// Remove root from file source paths if retrieving own shared items
|
|
if (isset($uidOwner) && isset($row['path'])) {
|
|
if (isset($row['parent'])) {
|
|
$row['path'] = '/Shared/'.basename($row['path']);
|
|
} else {
|
|
if (!isset($mounts[$row['storage']])) {
|
|
$mounts[$row['storage']] = \OC\Files\Filesystem::getMountByNumericId($row['storage']);
|
|
}
|
|
if ($mounts[$row['storage']]) {
|
|
$path = $mounts[$row['storage']]->getMountPoint().$row['path'];
|
|
$row['path'] = substr($path, $root);
|
|
}
|
|
}
|
|
}
|
|
if (isset($row['expiration'])) {
|
|
$time = new \DateTime();
|
|
if ($row['expiration'] < date('Y-m-d H:i', $time->format('U') - $time->getOffset())) {
|
|
self::delete($row['id']);
|
|
continue;
|
|
}
|
|
}
|
|
// Check if resharing is allowed, if not remove share permission
|
|
if (isset($row['permissions']) && !self::isResharingAllowed()) {
|
|
$row['permissions'] &= ~PERMISSION_SHARE;
|
|
}
|
|
// Add display names to result
|
|
if ( isset($row['share_with']) && $row['share_with'] != '') {
|
|
$row['share_with_displayname'] = \OCP\User::getDisplayName($row['share_with']);
|
|
}
|
|
if ( isset($row['uid_owner']) && $row['uid_owner'] != '') {
|
|
$row['displayname_owner'] = \OCP\User::getDisplayName($row['uid_owner']);
|
|
}
|
|
|
|
$items[$row['id']] = $row;
|
|
}
|
|
if (!empty($items)) {
|
|
$collectionItems = array();
|
|
foreach ($items as &$row) {
|
|
// Return only the item instead of a 2-dimensional array
|
|
if ($limit == 1 && $row[$column] == $item && ($row['item_type'] == $itemType || $itemType == 'file')) {
|
|
if ($format == self::FORMAT_NONE) {
|
|
return $row;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
// Check if this is a collection of the requested item type
|
|
if ($includeCollections && $collectionTypes && in_array($row['item_type'], $collectionTypes)) {
|
|
if (($collectionBackend = self::getBackend($row['item_type']))
|
|
&& $collectionBackend instanceof Share_Backend_Collection) {
|
|
// Collections can be inside collections, check if the item is a collection
|
|
if (isset($item) && $row['item_type'] == $itemType && $row[$column] == $item) {
|
|
$collectionItems[] = $row;
|
|
} else {
|
|
$collection = array();
|
|
$collection['item_type'] = $row['item_type'];
|
|
if ($row['item_type'] == 'file' || $row['item_type'] == 'folder') {
|
|
$collection['path'] = basename($row['path']);
|
|
}
|
|
$row['collection'] = $collection;
|
|
// Fetch all of the children sources
|
|
$children = $collectionBackend->getChildren($row[$column]);
|
|
foreach ($children as $child) {
|
|
$childItem = $row;
|
|
$childItem['item_type'] = $itemType;
|
|
if ($row['item_type'] != 'file' && $row['item_type'] != 'folder') {
|
|
$childItem['item_source'] = $child['source'];
|
|
$childItem['item_target'] = $child['target'];
|
|
}
|
|
if ($backend instanceof Share_Backend_File_Dependent) {
|
|
if ($row['item_type'] == 'file' || $row['item_type'] == 'folder') {
|
|
$childItem['file_source'] = $child['source'];
|
|
} else {
|
|
$meta = \OC\Files\Filesystem::getFileInfo($child['file_path']);
|
|
$childItem['file_source'] = $meta['fileid'];
|
|
}
|
|
$childItem['file_target'] =
|
|
\OC\Files\Filesystem::normalizePath($child['file_path']);
|
|
}
|
|
if (isset($item)) {
|
|
if ($childItem[$column] == $item) {
|
|
// Return only the item instead of a 2-dimensional array
|
|
if ($limit == 1) {
|
|
if ($format == self::FORMAT_NONE) {
|
|
return $childItem;
|
|
} else {
|
|
// Unset the items array and break out of both loops
|
|
$items = array();
|
|
$items[] = $childItem;
|
|
break 2;
|
|
}
|
|
} else {
|
|
$collectionItems[] = $childItem;
|
|
}
|
|
}
|
|
} else {
|
|
$collectionItems[] = $childItem;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Remove collection item
|
|
$toRemove = $row['id'];
|
|
if (array_key_exists($toRemove, $switchedItems)) {
|
|
$toRemove = $switchedItems[$toRemove];
|
|
}
|
|
unset($items[$toRemove]);
|
|
}
|
|
}
|
|
if (!empty($collectionItems)) {
|
|
$items = array_merge($items, $collectionItems);
|
|
}
|
|
if (empty($items) && $limit == 1) {
|
|
return false;
|
|
}
|
|
if ($format == self::FORMAT_NONE) {
|
|
return $items;
|
|
} else if ($format == self::FORMAT_STATUSES) {
|
|
$statuses = array();
|
|
foreach ($items as $item) {
|
|
if ($item['share_type'] == self::SHARE_TYPE_LINK) {
|
|
$statuses[$item[$column]]['link'] = true;
|
|
} else if (!isset($statuses[$item[$column]])) {
|
|
$statuses[$item[$column]]['link'] = false;
|
|
}
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$statuses[$item[$column]]['path'] = $item['path'];
|
|
}
|
|
}
|
|
return $statuses;
|
|
} else {
|
|
return $backend->formatItems($items, $format, $parameters);
|
|
}
|
|
} else if ($limit == 1 || (isset($uidOwner) && isset($item))) {
|
|
return false;
|
|
}
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* @brief Put shared item into the database
|
|
* @param string Item type
|
|
* @param string Item source
|
|
* @param int SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
|
|
* @param string User or group the item is being shared with
|
|
* @param int CRUDS permissions
|
|
* @param bool|array Parent folder target (optional)
|
|
* @return bool Returns true on success or false on failure
|
|
*/
|
|
private static function put($itemType, $itemSource, $shareType, $shareWith, $uidOwner,
|
|
$permissions, $parentFolder = null, $token = null) {
|
|
$backend = self::getBackend($itemType);
|
|
// Check if this is a reshare
|
|
if ($checkReshare = self::getItemSharedWithBySource($itemType, $itemSource, self::FORMAT_NONE, null, true)) {
|
|
// Check if attempting to share back to owner
|
|
if ($checkReshare['uid_owner'] == $shareWith && $shareType == self::SHARE_TYPE_USER) {
|
|
$message = 'Sharing '.$itemSource.' failed, because the user '.$shareWith.' is the original sharer';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
// Check if share permissions is granted
|
|
if (self::isResharingAllowed() && (int)$checkReshare['permissions'] & PERMISSION_SHARE) {
|
|
if (~(int)$checkReshare['permissions'] & $permissions) {
|
|
$message = 'Sharing '.$itemSource
|
|
.' failed, because the permissions exceed permissions granted to '.$uidOwner;
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
} else {
|
|
// TODO Don't check if inside folder
|
|
$parent = $checkReshare['id'];
|
|
$itemSource = $checkReshare['item_source'];
|
|
$fileSource = $checkReshare['file_source'];
|
|
$suggestedItemTarget = $checkReshare['item_target'];
|
|
$suggestedFileTarget = $checkReshare['file_target'];
|
|
$filePath = $checkReshare['file_target'];
|
|
}
|
|
} else {
|
|
$message = 'Sharing '.$itemSource.' failed, because resharing is not allowed';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
} else {
|
|
$parent = null;
|
|
$suggestedItemTarget = null;
|
|
$suggestedFileTarget = null;
|
|
if (!$backend->isValidSource($itemSource, $uidOwner)) {
|
|
$message = 'Sharing '.$itemSource.' failed, because the sharing backend for '
|
|
.$itemType.' could not find its source';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
$parent = null;
|
|
if ($backend instanceof Share_Backend_File_Dependent) {
|
|
$filePath = $backend->getFilePath($itemSource, $uidOwner);
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$fileSource = $itemSource;
|
|
} else {
|
|
$meta = \OC\Files\Filesystem::getFileInfo($filePath);
|
|
$fileSource = $meta['fileid'];
|
|
}
|
|
if ($fileSource == -1) {
|
|
$message = 'Sharing '.$itemSource.' failed, because the file could not be found in the file cache';
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
} else {
|
|
$filePath = null;
|
|
$fileSource = null;
|
|
}
|
|
}
|
|
$query = \OC_DB::prepare('INSERT INTO `*PREFIX*share` (`item_type`, `item_source`, `item_target`,'
|
|
.' `parent`, `share_type`, `share_with`, `uid_owner`, `permissions`, `stime`, `file_source`,'
|
|
.' `file_target`, `token`) VALUES (?,?,?,?,?,?,?,?,?,?,?,?)');
|
|
// Share with a group
|
|
if ($shareType == self::SHARE_TYPE_GROUP) {
|
|
$groupItemTarget = self::generateTarget($itemType, $itemSource, $shareType, $shareWith['group'],
|
|
$uidOwner, $suggestedItemTarget);
|
|
if (isset($fileSource)) {
|
|
if ($parentFolder) {
|
|
if ($parentFolder === true) {
|
|
$groupFileTarget = self::generateTarget('file', $filePath, $shareType,
|
|
$shareWith['group'], $uidOwner, $suggestedFileTarget);
|
|
// Set group default file target for future use
|
|
$parentFolders[0]['folder'] = $groupFileTarget;
|
|
} else {
|
|
// Get group default file target
|
|
$groupFileTarget = $parentFolder[0]['folder'].$itemSource;
|
|
$parent = $parentFolder[0]['id'];
|
|
}
|
|
} else {
|
|
$groupFileTarget = self::generateTarget('file', $filePath, $shareType, $shareWith['group'],
|
|
$uidOwner, $suggestedFileTarget);
|
|
}
|
|
} else {
|
|
$groupFileTarget = null;
|
|
}
|
|
$query->execute(array($itemType, $itemSource, $groupItemTarget, $parent, $shareType,
|
|
$shareWith['group'], $uidOwner, $permissions, time(), $fileSource, $groupFileTarget, $token));
|
|
// Save this id, any extra rows for this group share will need to reference it
|
|
$parent = \OC_DB::insertid('*PREFIX*share');
|
|
// Loop through all users of this group in case we need to add an extra row
|
|
foreach ($shareWith['users'] as $uid) {
|
|
$itemTarget = self::generateTarget($itemType, $itemSource, self::SHARE_TYPE_USER, $uid,
|
|
$uidOwner, $suggestedItemTarget, $parent);
|
|
if (isset($fileSource)) {
|
|
if ($parentFolder) {
|
|
if ($parentFolder === true) {
|
|
$fileTarget = self::generateTarget('file', $filePath, self::SHARE_TYPE_USER, $uid,
|
|
$uidOwner, $suggestedFileTarget, $parent);
|
|
if ($fileTarget != $groupFileTarget) {
|
|
$parentFolders[$uid]['folder'] = $fileTarget;
|
|
}
|
|
} else if (isset($parentFolder[$uid])) {
|
|
$fileTarget = $parentFolder[$uid]['folder'].$itemSource;
|
|
$parent = $parentFolder[$uid]['id'];
|
|
}
|
|
} else {
|
|
$fileTarget = self::generateTarget('file', $filePath, self::SHARE_TYPE_USER,
|
|
$uid, $uidOwner, $suggestedFileTarget, $parent);
|
|
}
|
|
} else {
|
|
$fileTarget = null;
|
|
}
|
|
// Insert an extra row for the group share if the item or file target is unique for this user
|
|
if ($itemTarget != $groupItemTarget || (isset($fileSource) && $fileTarget != $groupFileTarget)) {
|
|
$query->execute(array($itemType, $itemSource, $itemTarget, $parent,
|
|
self::$shareTypeGroupUserUnique, $uid, $uidOwner, $permissions, time(),
|
|
$fileSource, $fileTarget, $token));
|
|
$id = \OC_DB::insertid('*PREFIX*share');
|
|
}
|
|
}
|
|
\OC_Hook::emit('OCP\Share', 'post_shared', array(
|
|
'itemType' => $itemType,
|
|
'itemSource' => $itemSource,
|
|
'itemTarget' => $groupItemTarget,
|
|
'parent' => $parent,
|
|
'shareType' => $shareType,
|
|
'shareWith' => $shareWith['group'],
|
|
'uidOwner' => $uidOwner,
|
|
'permissions' => $permissions,
|
|
'fileSource' => $fileSource,
|
|
'fileTarget' => $groupFileTarget,
|
|
'id' => $parent,
|
|
'token' => $token
|
|
));
|
|
if ($parentFolder === true) {
|
|
// Return parent folders to preserve file target paths for potential children
|
|
return $parentFolders;
|
|
}
|
|
} else {
|
|
$itemTarget = self::generateTarget($itemType, $itemSource, $shareType, $shareWith, $uidOwner,
|
|
$suggestedItemTarget);
|
|
if (isset($fileSource)) {
|
|
if ($parentFolder) {
|
|
if ($parentFolder === true) {
|
|
$fileTarget = self::generateTarget('file', $filePath, $shareType, $shareWith,
|
|
$uidOwner, $suggestedFileTarget);
|
|
$parentFolders['folder'] = $fileTarget;
|
|
} else {
|
|
$fileTarget = $parentFolder['folder'].$itemSource;
|
|
$parent = $parentFolder['id'];
|
|
}
|
|
} else {
|
|
$fileTarget = self::generateTarget('file', $filePath, $shareType, $shareWith, $uidOwner,
|
|
$suggestedFileTarget);
|
|
}
|
|
} else {
|
|
$fileTarget = null;
|
|
}
|
|
$query->execute(array($itemType, $itemSource, $itemTarget, $parent, $shareType, $shareWith, $uidOwner,
|
|
$permissions, time(), $fileSource, $fileTarget, $token));
|
|
$id = \OC_DB::insertid('*PREFIX*share');
|
|
\OC_Hook::emit('OCP\Share', 'post_shared', array(
|
|
'itemType' => $itemType,
|
|
'itemSource' => $itemSource,
|
|
'itemTarget' => $itemTarget,
|
|
'parent' => $parent,
|
|
'shareType' => $shareType,
|
|
'shareWith' => $shareWith,
|
|
'uidOwner' => $uidOwner,
|
|
'permissions' => $permissions,
|
|
'fileSource' => $fileSource,
|
|
'fileTarget' => $fileTarget,
|
|
'id' => $id,
|
|
'token' => $token
|
|
));
|
|
if ($parentFolder === true) {
|
|
$parentFolders['id'] = $id;
|
|
// Return parent folder to preserve file target paths for potential children
|
|
return $parentFolders;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Generate a unique target for the item
|
|
* @param string Item type
|
|
* @param string Item source
|
|
* @param int SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
|
|
* @param string User or group the item is being shared with
|
|
* @param string The suggested target originating from a reshare (optional)
|
|
* @param int The id of the parent group share (optional)
|
|
* @return string Item target
|
|
*/
|
|
private static function generateTarget($itemType, $itemSource, $shareType, $shareWith, $uidOwner,
|
|
$suggestedTarget = null, $groupParent = null) {
|
|
$backend = self::getBackend($itemType);
|
|
if ($shareType == self::SHARE_TYPE_LINK) {
|
|
if (isset($suggestedTarget)) {
|
|
return $suggestedTarget;
|
|
}
|
|
return $backend->generateTarget($itemSource, false);
|
|
} else {
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$column = 'file_target';
|
|
$columnSource = 'file_source';
|
|
} else {
|
|
$column = 'item_target';
|
|
$columnSource = 'item_source';
|
|
}
|
|
if ($shareType == self::SHARE_TYPE_USER) {
|
|
// Share with is a user, so set share type to user and groups
|
|
$shareType = self::$shareTypeUserAndGroups;
|
|
$userAndGroups = array_merge(array($shareWith), \OC_Group::getUserGroups($shareWith));
|
|
} else {
|
|
$userAndGroups = false;
|
|
}
|
|
$exclude = null;
|
|
// Backend has 3 opportunities to generate a unique target
|
|
for ($i = 0; $i < 2; $i++) {
|
|
// Check if suggested target exists first
|
|
if ($i == 0 && isset($suggestedTarget)) {
|
|
$target = $suggestedTarget;
|
|
} else {
|
|
if ($shareType == self::SHARE_TYPE_GROUP) {
|
|
$target = $backend->generateTarget($itemSource, false, $exclude);
|
|
} else {
|
|
$target = $backend->generateTarget($itemSource, $shareWith, $exclude);
|
|
}
|
|
if (is_array($exclude) && in_array($target, $exclude)) {
|
|
break;
|
|
}
|
|
}
|
|
// Check if target already exists
|
|
$checkTarget = self::getItems($itemType, $target, $shareType, $shareWith);
|
|
if (!empty($checkTarget)) {
|
|
foreach ($checkTarget as $item) {
|
|
// Skip item if it is the group parent row
|
|
if (isset($groupParent) && $item['id'] == $groupParent) {
|
|
if (count($checkTarget) == 1) {
|
|
return $target;
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
if ($item['uid_owner'] == $uidOwner) {
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
$meta = \OC\Files\Filesystem::getFileInfo($itemSource);
|
|
if ($item['file_source'] == $meta['fileid']) {
|
|
return $target;
|
|
}
|
|
} else if ($item['item_source'] == $itemSource) {
|
|
return $target;
|
|
}
|
|
}
|
|
}
|
|
if (!isset($exclude)) {
|
|
$exclude = array();
|
|
}
|
|
// Find similar targets to improve backend's chances to generate a unqiue target
|
|
if ($userAndGroups) {
|
|
if ($column == 'file_target') {
|
|
$checkTargets = \OC_DB::prepare('SELECT `'.$column.'` FROM `*PREFIX*share`'
|
|
.' WHERE `item_type` IN (\'file\', \'folder\')'
|
|
.' AND `share_type` IN (?,?,?)'
|
|
.' AND `share_with` IN (\''.implode('\',\'', $userAndGroups).'\')');
|
|
$result = $checkTargets->execute(array(self::SHARE_TYPE_USER, self::SHARE_TYPE_GROUP,
|
|
self::$shareTypeGroupUserUnique));
|
|
} else {
|
|
$checkTargets = \OC_DB::prepare('SELECT `'.$column.'` FROM `*PREFIX*share`'
|
|
.' WHERE `item_type` = ? AND `share_type` IN (?,?,?)'
|
|
.' AND `share_with` IN (\''.implode('\',\'', $userAndGroups).'\')');
|
|
$result = $checkTargets->execute(array($itemType, self::SHARE_TYPE_USER,
|
|
self::SHARE_TYPE_GROUP, self::$shareTypeGroupUserUnique));
|
|
}
|
|
} else {
|
|
if ($column == 'file_target') {
|
|
$checkTargets = \OC_DB::prepare('SELECT `'.$column.'` FROM `*PREFIX*share`'
|
|
.' WHERE `item_type` IN (\'file\', \'folder\')'
|
|
.' AND `share_type` = ? AND `share_with` = ?');
|
|
$result = $checkTargets->execute(array(self::SHARE_TYPE_GROUP, $shareWith));
|
|
} else {
|
|
$checkTargets = \OC_DB::prepare('SELECT `'.$column.'` FROM `*PREFIX*share`'
|
|
.' WHERE `item_type` = ? AND `share_type` = ? AND `share_with` = ?');
|
|
$result = $checkTargets->execute(array($itemType, self::SHARE_TYPE_GROUP, $shareWith));
|
|
}
|
|
}
|
|
while ($row = $result->fetchRow()) {
|
|
$exclude[] = $row[$column];
|
|
}
|
|
} else {
|
|
return $target;
|
|
}
|
|
}
|
|
}
|
|
$message = 'Sharing backend registered for '.$itemType.' did not generate a unique target for '.$itemSource;
|
|
\OC_Log::write('OCP\Share', $message, \OC_Log::ERROR);
|
|
throw new \Exception($message);
|
|
}
|
|
|
|
/**
|
|
* @brief Delete all reshares of an item
|
|
* @param int Id of item to delete
|
|
* @param bool If true, exclude the parent from the delete (optional)
|
|
* @param string The user that the parent was shared with (optinal)
|
|
*/
|
|
private static function delete($parent, $excludeParent = false, $uidOwner = null) {
|
|
$ids = array($parent);
|
|
$parents = array($parent);
|
|
while (!empty($parents)) {
|
|
$parents = "'".implode("','", $parents)."'";
|
|
// Check the owner on the first search of reshares, useful for
|
|
// finding and deleting the reshares by a single user of a group share
|
|
if (count($ids) == 1 && isset($uidOwner)) {
|
|
$query = \OC_DB::prepare('SELECT `id`, `uid_owner`, `item_type`, `item_target`, `parent`'
|
|
.' FROM `*PREFIX*share` WHERE `parent` IN ('.$parents.') AND `uid_owner` = ?');
|
|
$result = $query->execute(array($uidOwner));
|
|
} else {
|
|
$query = \OC_DB::prepare('SELECT `id`, `item_type`, `item_target`, `parent`, `uid_owner`'
|
|
.' FROM `*PREFIX*share` WHERE `parent` IN ('.$parents.')');
|
|
$result = $query->execute();
|
|
}
|
|
// Reset parents array, only go through loop again if items are found
|
|
$parents = array();
|
|
while ($item = $result->fetchRow()) {
|
|
// Search for a duplicate parent share, this occurs when an
|
|
// item is shared to the same user through a group and user or the
|
|
// same item is shared by different users
|
|
$userAndGroups = array_merge(array($item['uid_owner']), \OC_Group::getUserGroups($item['uid_owner']));
|
|
$query = \OC_DB::prepare('SELECT `id`, `permissions` FROM `*PREFIX*share`'
|
|
.' WHERE `item_type` = ?'
|
|
.' AND `item_target` = ?'
|
|
.' AND `share_type` IN (?,?,?)'
|
|
.' AND `share_with` IN (\''.implode('\',\'', $userAndGroups).'\')'
|
|
.' AND `uid_owner` != ? AND `id` != ?');
|
|
$duplicateParent = $query->execute(array($item['item_type'], $item['item_target'],
|
|
self::SHARE_TYPE_USER, self::SHARE_TYPE_GROUP, self::$shareTypeGroupUserUnique,
|
|
$item['uid_owner'], $item['parent']))->fetchRow();
|
|
if ($duplicateParent) {
|
|
// Change the parent to the other item id if share permission is granted
|
|
if ($duplicateParent['permissions'] & PERMISSION_SHARE) {
|
|
$query = \OC_DB::prepare('UPDATE `*PREFIX*share` SET `parent` = ? WHERE `id` = ?');
|
|
$query->execute(array($duplicateParent['id'], $item['id']));
|
|
continue;
|
|
}
|
|
}
|
|
$ids[] = $item['id'];
|
|
$parents[] = $item['id'];
|
|
}
|
|
}
|
|
if ($excludeParent) {
|
|
unset($ids[0]);
|
|
}
|
|
if (!empty($ids)) {
|
|
$ids = "'".implode("','", $ids)."'";
|
|
$query = \OC_DB::prepare('DELETE FROM `*PREFIX*share` WHERE `id` IN ('.$ids.')');
|
|
$query->execute();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Hook Listeners
|
|
*/
|
|
|
|
public static function post_deleteUser($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` = ?');
|
|
$result = $query->execute(array($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 = $result->fetchRow()) {
|
|
self::delete($item['id']);
|
|
}
|
|
}
|
|
|
|
public static function post_addToGroup($arguments) {
|
|
// Find the group shares and check if the user needs a unique target
|
|
$query = \OC_DB::prepare('SELECT * FROM `*PREFIX*share` WHERE `share_type` = ? AND `share_with` = ?');
|
|
$result = $query->execute(array(self::SHARE_TYPE_GROUP, $arguments['gid']));
|
|
$query = \OC_DB::prepare('INSERT INTO `*PREFIX*share` (`item_type`, `item_source`,'
|
|
.' `item_target`, `parent`, `share_type`, `share_with`, `uid_owner`, `permissions`,'
|
|
.' `stime`, `file_source`, `file_target`) VALUES (?,?,?,?,?,?,?,?,?,?,?)');
|
|
while ($item = $result->fetchRow()) {
|
|
if ($item['item_type'] == 'file' || $item['item_type'] == 'file') {
|
|
$itemTarget = null;
|
|
} else {
|
|
$itemTarget = self::generateTarget($item['item_type'], $item['item_source'], self::SHARE_TYPE_USER,
|
|
$arguments['uid'], $item['uid_owner'], $item['item_target'], $item['id']);
|
|
}
|
|
if (isset($item['file_source'])) {
|
|
$fileTarget = self::generateTarget($item['item_type'], $item['item_source'], self::SHARE_TYPE_USER,
|
|
$arguments['uid'], $item['uid_owner'], $item['file_target'], $item['id']);
|
|
} else {
|
|
$fileTarget = null;
|
|
}
|
|
// Insert an extra row for the group share if the item or file target is unique for this user
|
|
if ($itemTarget != $item['item_target'] || $fileTarget != $item['file_target']) {
|
|
$query->execute(array($item['item_type'], $item['item_source'], $itemTarget, $item['id'],
|
|
self::$shareTypeGroupUserUnique, $arguments['uid'], $item['uid_owner'], $item['permissions'],
|
|
$item['stime'], $item['file_source'], $fileTarget));
|
|
\OC_DB::insertid('*PREFIX*share');
|
|
}
|
|
}
|
|
}
|
|
|
|
public static function post_removeFromGroup($arguments) {
|
|
// TODO Don't call if user deleted?
|
|
$query = \OC_DB::prepare('SELECT `id`, `share_type` FROM `*PREFIX*share`'
|
|
.' WHERE (`share_type` = ? AND `share_with` = ?) OR (`share_type` = ? AND `share_with` = ?)');
|
|
$result = $query->execute(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
|
|
self::delete($item['id'], true, $arguments['uid']);
|
|
} else {
|
|
self::delete($item['id']);
|
|
}
|
|
}
|
|
}
|
|
|
|
public static function post_deleteGroup($arguments) {
|
|
$query = \OC_DB::prepare('SELECT id FROM `*PREFIX*share` WHERE `share_type` = ? AND `share_with` = ?');
|
|
$result = $query->execute(array(self::SHARE_TYPE_GROUP, $arguments['gid']));
|
|
while ($item = $result->fetchRow()) {
|
|
self::delete($item['id']);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Interface that apps must implement to share content.
|
|
*/
|
|
interface Share_Backend {
|
|
|
|
/**
|
|
* @brief Get the source of the item to be stored in the database
|
|
* @param string Item source
|
|
* @param string Owner of the item
|
|
* @return mixed|array|false Source
|
|
*
|
|
* Return an array if the item is file dependent, the array needs two keys: 'item' and 'file'
|
|
* Return false if the item does not exist for the user
|
|
*
|
|
* The formatItems() function will translate the source returned back into the item
|
|
*/
|
|
public function isValidSource($itemSource, $uidOwner);
|
|
|
|
/**
|
|
* @brief Get a unique name of the item for the specified user
|
|
* @param string Item source
|
|
* @param string|false User the item is being shared with
|
|
* @param array|null List of similar item names already existing as shared items
|
|
* @return string Target name
|
|
*
|
|
* This function needs to verify that the user does not already have an item with this name.
|
|
* If it does generate a new name e.g. name_#
|
|
*/
|
|
public function generateTarget($itemSource, $shareWith, $exclude = null);
|
|
|
|
/**
|
|
* @brief Converts the shared item sources back into the item in the specified format
|
|
* @param array Shared items
|
|
* @param int Format
|
|
* @return ?
|
|
*
|
|
* The items array is a 3-dimensional array with the item_source as the
|
|
* first key and the share id as the second key to an array with the share
|
|
* info.
|
|
*
|
|
* The key/value pairs included in the share info depend on the function originally called:
|
|
* If called by getItem(s)Shared: id, item_type, item, item_source,
|
|
* share_type, share_with, permissions, stime, file_source
|
|
*
|
|
* If called by getItem(s)SharedWith: id, item_type, item, item_source,
|
|
* item_target, share_type, share_with, permissions, stime, file_source,
|
|
* file_target
|
|
*
|
|
* This function allows the backend to control the output of shared items with custom formats.
|
|
* It is only called through calls to the public getItem(s)Shared(With) functions.
|
|
*/
|
|
public function formatItems($items, $format, $parameters = null);
|
|
|
|
}
|
|
|
|
/**
|
|
* Interface for share backends that share content that is dependent on files.
|
|
* Extends the Share_Backend interface.
|
|
*/
|
|
interface Share_Backend_File_Dependent extends Share_Backend {
|
|
|
|
/**
|
|
* @brief Get the file path of the item
|
|
* @param
|
|
* @param
|
|
* @return
|
|
*/
|
|
public function getFilePath($itemSource, $uidOwner);
|
|
|
|
}
|
|
|
|
/**
|
|
* Interface for collections of of items implemented by another share backend.
|
|
* Extends the Share_Backend interface.
|
|
*/
|
|
interface Share_Backend_Collection extends Share_Backend {
|
|
|
|
/**
|
|
* @brief Get the sources of the children of the item
|
|
* @param string Item source
|
|
* @return array Returns an array of children each inside an array with the keys: source, target, and file_path if applicable
|
|
*/
|
|
public function getChildren($itemSource);
|
|
|
|
}
|