525 lines
16 KiB
PHP
525 lines
16 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Bjoern Schiessle
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* @copyright 2013 Bjoern Schiessle schiessle@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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*/
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namespace OCA\Files\Share;
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class Api {
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/**
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* @brief get all shares
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*
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* @param array $params option 'file' to limit the result to a specific file/folder
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* @return \OC_OCS_Result share information
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*/
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public static function getAllShares($params) {
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// if a file is specified, get the share for this file
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if (isset($_GET['path'])) {
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$params['itemSource'] = self::getFileId($_GET['path']);
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$params['path'] = $_GET['path'];
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$params['itemType'] = self::getItemType($_GET['path']);
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if ( isset($_GET['reshares']) && $_GET['reshares'] !== 'false' ) {
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$params['reshares'] = true;
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} else {
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$params['reshares'] = false;
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}
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if (isset($_GET['subfiles']) && $_GET['subfiles'] !== 'false') {
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return self::getSharesFromFolder($params);
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}
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return self::collectShares($params);
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}
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$share = \OCP\Share::getItemShared('file', null);
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if ($share === false) {
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return new \OC_OCS_Result(null, 404, 'could not get shares');
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} else {
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return new \OC_OCS_Result($share);
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}
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}
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/**
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* @brief get share information for a given share
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*
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* @param array $params which contains a 'id'
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* @return \OC_OCS_Result share information
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*/
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public static function getShare($params) {
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$s = self::getShareFromId($params['id']);
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$params['itemSource'] = $s['item_source'];
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$params['itemType'] = $s['item_type'];
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$params['specificShare'] = true;
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return self::collectShares($params);
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}
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/**
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* @brief collect all share information, either of a specific share or all
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* shares for a given path
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* @param array $params
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* @return \OC_OCS_Result
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*/
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private static function collectShares($params) {
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$itemSource = $params['itemSource'];
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$itemType = $params['itemType'];
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$getSpecificShare = isset($params['specificShare']) ? $params['specificShare'] : false;
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if ($itemSource !== null) {
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$shares = \OCP\Share::getItemShared($itemType, $itemSource);
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$receivedFrom = \OCP\Share::getItemSharedWithBySource($itemType, $itemSource);
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// if a specific share was specified only return this one
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if ($getSpecificShare === true) {
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foreach ($shares as $share) {
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if ($share['id'] === (int) $params['id']) {
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$shares = array('element' => $share);
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break;
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}
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}
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}
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// include also reshares in the lists. This means that the result
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// will contain every user with access to the file.
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if (isset($params['reshares']) && $params['reshares'] === true) {
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$shares = self::addReshares($shares, $itemSource);
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}
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if ($receivedFrom) {
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$shares['received_from'] = $receivedFrom['uid_owner'];
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$shares['received_from_displayname'] = \OCP\User::getDisplayName($receivedFrom['uid_owner']);
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}
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} else {
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$shares = null;
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}
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if ($shares === null || empty($shares)) {
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return new \OC_OCS_Result(null, 404, 'share doesn\'t exist');
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} else {
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return new \OC_OCS_Result($shares);
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}
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}
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/**
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* @brief add reshares to a array of shares
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* @param array $shares array of shares
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* @param int $itemSource item source ID
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* @return array new shares array which includes reshares
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*/
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private static function addReshares($shares, $itemSource) {
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// if there are no shares than there are also no reshares
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$firstShare = reset($shares);
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if ($firstShare) {
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$path = $firstShare['path'];
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} else {
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return $shares;
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}
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$select = '`*PREFIX*share`.`id`, `item_type`, `*PREFIX*share`.`parent`, `share_type`, `share_with`, `file_source`, `path` , `permissions`, `stime`, `expiration`, `token`, `storage`, `mail_send`, `mail_send`';
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$getReshares = \OC_DB::prepare('SELECT ' . $select . ' FROM `*PREFIX*share` INNER JOIN `*PREFIX*filecache` ON `file_source` = `*PREFIX*filecache`.`fileid` WHERE `*PREFIX*share`.`file_source` = ? AND `*PREFIX*share`.`item_type` IN (\'file\', \'folder\') AND `uid_owner` != ?');
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$reshares = $getReshares->execute(array($itemSource, \OCP\User::getUser()))->fetchAll();
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foreach ($reshares as $key => $reshare) {
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if (isset($reshare['share_with']) && $reshare['share_with'] !== '') {
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$reshares[$key]['share_with_displayname'] = \OCP\User::getDisplayName($reshare['share_with']);
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}
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// add correct path to the result
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$reshares[$key]['path'] = $path;
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}
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return array_merge($shares, $reshares);
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}
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/**
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* @brief get share from all files in a given folder (non-recursive)
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* @param array $params contains 'path' to the folder
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* @return \OC_OCS_Result
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*/
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private static function getSharesFromFolder($params) {
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$path = $params['path'];
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$view = new \OC\Files\View('/'.\OCP\User::getUser().'/files');
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if(!$view->is_dir($path)) {
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return new \OC_OCS_Result(null, 400, "not a directory");
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}
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$content = $view->getDirectoryContent($path);
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$result = array();
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foreach ($content as $file) {
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// workaround because folders are named 'dir' in this context
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$itemType = $file['type'] === 'file' ? 'file' : 'folder';
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$share = \OCP\Share::getItemShared($itemType, $file['fileid']);
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$receivedFrom = \OCP\Share::getItemSharedWithBySource($itemType, $file['fileid']);
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if ($receivedFrom) {
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$share['received_from'] = $receivedFrom['uid_owner'];
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$share['received_from_displayname'] = \OCP\User::getDisplayName($receivedFrom['uid_owner']);
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}
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if ($share) {
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$result = array_merge($result, $share);
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}
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}
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return new \OC_OCS_Result($result);
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}
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/**
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* @breif create a new share
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* @param array $params
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* @return \OC_OCS_Result
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*/
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public static function createShare($params) {
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$path = isset($_POST['path']) ? $_POST['path'] : null;
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if($path === null) {
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return new \OC_OCS_Result(null, 400, "please specify a file or folder path");
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}
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$itemSource = self::getFileId($path);
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$itemType = self::getItemType($path);
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if($itemSource === null) {
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return new \OC_OCS_Result(null, 404, "wrong path, file/folder doesn't exist.");
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}
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$shareWith = isset($_POST['shareWith']) ? $_POST['shareWith'] : null;
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$shareType = isset($_POST['shareType']) ? (int)$_POST['shareType'] : null;
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switch($shareType) {
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case \OCP\Share::SHARE_TYPE_USER:
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$permissions = isset($_POST['permissions']) ? (int)$_POST['permissions'] : 31;
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break;
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case \OCP\Share::SHARE_TYPE_GROUP:
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$permissions = isset($_POST['permissions']) ? (int)$_POST['permissions'] : 31;
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break;
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case \OCP\Share::SHARE_TYPE_LINK:
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//allow password protection
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$shareWith = isset($_POST['password']) ? $_POST['password'] : null;
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//check public link share
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$publicUploadEnabled = \OC::$server->getAppConfig()->getValue('core', 'shareapi_allow_public_upload', 'yes');
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if(isset($_POST['publicUpload']) && $publicUploadEnabled !== 'yes') {
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return new \OC_OCS_Result(null, 403, "public upload disabled by the administrator");
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}
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$publicUpload = isset($_POST['publicUpload']) ? $_POST['publicUpload'] : 'false';
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// read, create, update (7) if public upload is enabled or
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// read (1) if public upload is disabled
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$permissions = $publicUpload === 'true' ? 7 : 1;
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break;
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default:
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return new \OC_OCS_Result(null, 400, "unknown share type");
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}
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try {
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$token = \OCP\Share::shareItem(
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$itemType,
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$itemSource,
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$shareType,
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$shareWith,
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$permissions
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);
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} catch (\Exception $e) {
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return new \OC_OCS_Result(null, 403, $e->getMessage());
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}
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if ($token) {
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$data = array();
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$data['id'] = 'unknown';
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$shares = \OCP\Share::getItemShared($itemType, $itemSource);
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if(is_string($token)) { //public link share
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foreach ($shares as $share) {
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if ($share['token'] === $token) {
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$data['id'] = $share['id'];
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break;
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}
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}
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$url = \OCP\Util::linkToPublic('files&t='.$token);
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$data['url'] = $url; // '&' gets encoded to $amp;
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$data['token'] = $token;
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} else {
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foreach ($shares as $share) {
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if ($share['share_with'] === $shareWith && $share['share_type'] === $shareType) {
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$data['id'] = $share['id'];
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break;
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}
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}
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}
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return new \OC_OCS_Result($data);
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} else {
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return new \OC_OCS_Result(null, 404, "couldn't share file");
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}
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}
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/**
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* update shares, e.g. password, permissions, etc
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* @param array $params shareId 'id' and the parameter we want to update
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* currently supported: permissions, password, publicUpload
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* @return \OC_OCS_Result
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*/
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public static function updateShare($params) {
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$share = self::getShareFromId($params['id']);
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$itemSource = isset($share['item_source']) ? $share['item_source'] : null;
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if($itemSource === null) {
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return new \OC_OCS_Result(null, 404, "wrong share Id, share doesn't exist.");
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}
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try {
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if(isset($params['_put']['permissions'])) {
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return self::updatePermissions($share, $params);
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} elseif (isset($params['_put']['password'])) {
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return self::updatePassword($share, $params);
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} elseif (isset($params['_put']['publicUpload'])) {
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return self::updatePublicUpload($share, $params);
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}
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} catch (\Exception $e) {
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return new \OC_OCS_Result(null, 400, $e->getMessage());
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}
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return new \OC_OCS_Result(null, 400, "Wrong or no update parameter given");
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}
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/**
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* @brief update permissions for a share
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* @param array $share information about the share
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* @param array $params contains 'permissions'
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* @return \OC_OCS_Result
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*/
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private static function updatePermissions($share, $params) {
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$itemSource = $share['item_source'];
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$itemType = $share['item_type'];
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$shareWith = $share['share_with'];
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$shareType = $share['share_type'];
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$permissions = isset($params['_put']['permissions']) ? (int)$params['_put']['permissions'] : null;
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$publicUploadStatus = \OC::$server->getAppConfig()->getValue('core', 'shareapi_allow_public_upload', 'yes');
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$publicUploadEnabled = ($publicUploadStatus === 'yes') ? true : false;
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// only change permissions for public shares if public upload is enabled
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// and we want to set permissions to 1 (read only) or 7 (allow upload)
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if ( (int)$shareType === \OCP\Share::SHARE_TYPE_LINK ) {
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if ($publicUploadEnabled === false || ($permissions !== 7 && $permissions !== 1)) {
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return new \OC_OCS_Result(null, 400, "can't change permission for public link share");
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}
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}
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try {
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$return = \OCP\Share::setPermissions(
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$itemType,
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$itemSource,
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$shareType,
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$shareWith,
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$permissions
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);
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} catch (\Exception $e) {
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return new \OC_OCS_Result(null, 404, $e->getMessage());
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}
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if ($return) {
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return new \OC_OCS_Result();
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} else {
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return new \OC_OCS_Result(null, 404, "couldn't set permissions");
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}
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}
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/**
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* @brief enable/disable public upload
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* @param array $share information about the share
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* @param array $params contains 'publicUpload' which can be 'yes' or 'no'
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* @return \OC_OCS_Result
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*/
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private static function updatePublicUpload($share, $params) {
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$publicUploadEnabled = \OC::$server->getAppConfig()->getValue('core', 'shareapi_allow_public_upload', 'yes');
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if($publicUploadEnabled !== 'yes') {
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return new \OC_OCS_Result(null, 403, "public upload disabled by the administrator");
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}
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if ($share['item_type'] !== 'folder' ||
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(int)$share['share_type'] !== \OCP\Share::SHARE_TYPE_LINK ) {
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return new \OC_OCS_Result(null, 404, "public upload is only possible for public shared folders");
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}
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// read, create, update (7) if public upload is enabled or
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// read (1) if public upload is disabled
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$params['_put']['permissions'] = $params['_put']['publicUpload'] === 'true' ? 7 : 1;
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return self::updatePermissions($share, $params);
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}
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/**
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* @brief update password for public link share
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* @param array $share information about the share
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* @param type $params 'password'
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* @return \OC_OCS_Result
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*/
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private static function updatePassword($share, $params) {
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$itemSource = $share['item_source'];
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$itemType = $share['item_type'];
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if( (int)$share['share_type'] !== \OCP\Share::SHARE_TYPE_LINK) {
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return new \OC_OCS_Result(null, 400, "password protection is only supported for public shares");
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}
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$shareWith = isset($params['_put']['password']) ? $params['_put']['password'] : null;
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if($shareWith === '') {
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$shareWith = null;
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}
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$items = \OCP\Share::getItemShared($itemType, $itemSource);
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$checkExists = false;
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foreach ($items as $item) {
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if($item['share_type'] === \OCP\Share::SHARE_TYPE_LINK) {
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$checkExists = true;
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$permissions = $item['permissions'];
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}
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}
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if (!$checkExists) {
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return new \OC_OCS_Result(null, 404, "share doesn't exists, can't change password");
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}
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$result = \OCP\Share::shareItem(
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$itemType,
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$itemSource,
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\OCP\Share::SHARE_TYPE_LINK,
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$shareWith,
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$permissions
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);
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if($result) {
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return new \OC_OCS_Result();
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}
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return new \OC_OCS_Result(null, 404, "couldn't set password");
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}
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/**
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* @brief unshare a file/folder
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* @param array $params contains the shareID 'id' which should be unshared
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* @return \OC_OCS_Result
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*/
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public static function deleteShare($params) {
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$share = self::getShareFromId($params['id']);
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$itemSource = isset($share['item_source']) ? $share['item_source'] : null;
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$itemType = isset($share['item_type']) ? $share['item_type'] : null;;
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if($itemSource === null) {
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return new \OC_OCS_Result(null, 404, "wrong share ID, share doesn't exist.");
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}
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$shareWith = isset($share['share_with']) ? $share['share_with'] : null;
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$shareType = isset($share['share_type']) ? (int)$share['share_type'] : null;
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if( $shareType === \OCP\Share::SHARE_TYPE_LINK) {
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$shareWith = null;
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}
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try {
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$return = \OCP\Share::unshare(
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$itemType,
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$itemSource,
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$shareType,
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$shareWith);
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} catch (\Exception $e) {
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return new \OC_OCS_Result(null, 404, $e->getMessage());
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}
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if ($return) {
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return new \OC_OCS_Result();
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} else {
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$msg = "Unshare Failed";
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return new \OC_OCS_Result(null, 404, $msg);
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}
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}
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/**
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* @brief get file ID from a given path
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* @param string $path
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* @return string fileID or null
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*/
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private static function getFileId($path) {
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$view = new \OC\Files\View('/'.\OCP\User::getUser().'/files');
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$fileId = null;
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$fileInfo = $view->getFileInfo($path);
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if ($fileInfo) {
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$fileId = $fileInfo['fileid'];
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}
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return $fileId;
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}
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/**
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* @brief get itemType
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* @param string $path
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* @return string type 'file', 'folder' or null of file/folder doesn't exists
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*/
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private static function getItemType($path) {
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$view = new \OC\Files\View('/'.\OCP\User::getUser().'/files');
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$itemType = null;
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if ($view->is_dir($path)) {
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$itemType = "folder";
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} elseif ($view->is_file($path)) {
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$itemType = "file";
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}
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return $itemType;
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}
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/**
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* @brief get some information from a given share
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* @param int $shareID
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* @return array with: item_source, share_type, share_with, item_type, permissions
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*/
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private static function getShareFromId($shareID) {
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$sql = 'SELECT `item_source`, `share_type`, `share_with`, `item_type`, `permissions` FROM `*PREFIX*share` WHERE `id` = ?';
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$args = array($shareID);
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$query = \OCP\DB::prepare($sql);
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$result = $query->execute($args);
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('files_sharing', \OC_DB::getErrorMessage($result), \OCP\Util::ERROR);
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return null;
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}
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if ($share = $result->fetchRow()) {
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return $share;
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}
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return null;
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}
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}
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