nextcloud/apps/files_sharing/api/sharees.php

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<?php
/**
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Roeland Jago Douma <rullzer@owncloud.com>
*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\Files_Sharing\API;
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use OCP\AppFramework\Http;
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use OCP\Contacts\IManager;
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use OCP\IGroup;
use OCP\IGroupManager;
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use OCP\ILogger;
use OCP\IRequest;
use OCP\IUser;
use OCP\IUserManager;
use OCP\IConfig;
use OCP\IUserSession;
use OCP\IURLGenerator;
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use OCP\Share;
class Sharees {
/** @var IGroupManager */
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protected $groupManager;
/** @var IUserManager */
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protected $userManager;
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/** @var IManager */
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protected $contactsManager;
/** @var IConfig */
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protected $config;
/** @var IUserSession */
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protected $userSession;
/** @var IRequest */
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protected $request;
/** @var IURLGenerator */
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protected $urlGenerator;
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/** @var ILogger */
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protected $logger;
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/** @var bool */
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protected $shareWithGroupOnly = false;
/** @var bool */
protected $shareeEnumeration = true;
/** @var int */
protected $offset = 0;
/** @var int */
protected $limit = 10;
/** @var array */
protected $result = [
'exact' => [
'users' => [],
'groups' => [],
'remotes' => [],
],
'users' => [],
'groups' => [],
'remotes' => [],
];
protected $reachedEndFor = [];
/**
* @param IGroupManager $groupManager
* @param IUserManager $userManager
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* @param IManager $contactsManager
* @param IConfig $config
* @param IUserSession $userSession
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* @param IURLGenerator $urlGenerator
* @param IRequest $request
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* @param ILogger $logger
*/
public function __construct(IGroupManager $groupManager,
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IUserManager $userManager,
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IManager $contactsManager,
IConfig $config,
IUserSession $userSession,
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IURLGenerator $urlGenerator,
IRequest $request,
ILogger $logger) {
$this->groupManager = $groupManager;
$this->userManager = $userManager;
$this->contactsManager = $contactsManager;
$this->config = $config;
$this->userSession = $userSession;
$this->urlGenerator = $urlGenerator;
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$this->request = $request;
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$this->logger = $logger;
}
/**
* @param string $search
*/
protected function getUsers($search) {
$this->result['users'] = $this->result['exact']['users'] = $users = [];
$userGroups = [];
if ($this->shareWithGroupOnly) {
// Search in all the groups this user is part of
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$userGroups = $this->groupManager->getUserGroupIds($this->userSession->getUser());
foreach ($userGroups as $userGroup) {
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$usersTmp = $this->groupManager->displayNamesInGroup($userGroup, $search, $this->limit, $this->offset);
foreach ($usersTmp as $uid => $userDisplayName) {
$users[$uid] = $userDisplayName;
}
}
} else {
// Search in all users
$usersTmp = $this->userManager->searchDisplayName($search, $this->limit, $this->offset);
foreach ($usersTmp as $user) {
$users[$user->getUID()] = $user->getDisplayName();
}
}
if (!$this->shareeEnumeration || sizeof($users) < $this->limit) {
$this->reachedEndFor[] = 'users';
}
$foundUserById = false;
foreach ($users as $uid => $userDisplayName) {
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if (strtolower($uid) === $search || strtolower($userDisplayName) === $search) {
if (strtolower($uid) === $search) {
$foundUserById = true;
}
$this->result['exact']['users'][] = [
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'label' => $userDisplayName,
'value' => [
'shareType' => Share::SHARE_TYPE_USER,
'shareWith' => $uid,
],
];
} else {
$this->result['users'][] = [
'label' => $userDisplayName,
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'value' => [
'shareType' => Share::SHARE_TYPE_USER,
'shareWith' => $uid,
],
];
}
}
if ($this->offset === 0 && !$foundUserById) {
// On page one we try if the search result has a direct hit on the
// user id and if so, we add that to the exact match list
$user = $this->userManager->get($search);
if ($user instanceof IUser) {
$addUser = true;
if ($this->shareWithGroupOnly) {
// Only add, if we have a common group
$commonGroups = array_intersect($userGroups, $this->groupManager->getUserGroupIds($user));
$addUser = !empty($commonGroups);
}
if ($addUser) {
array_push($this->result['exact']['users'], [
'label' => $user->getDisplayName(),
'value' => [
'shareType' => Share::SHARE_TYPE_USER,
'shareWith' => $user->getUID(),
],
]);
}
}
}
if (!$this->shareeEnumeration) {
$this->result['users'] = [];
}
}
/**
* @param string $search
*/
protected function getGroups($search) {
$this->result['groups'] = $this->result['exact']['groups'] = [];
$groups = $this->groupManager->search($search, $this->limit, $this->offset);
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$groups = array_map(function (IGroup $group) { return $group->getGID(); }, $groups);
if (!$this->shareeEnumeration || sizeof($groups) < $this->limit) {
$this->reachedEndFor[] = 'groups';
}
$userGroups = [];
if (!empty($groups) && $this->shareWithGroupOnly) {
// Intersect all the groups that match with the groups this user is a member of
$userGroups = $this->groupManager->getUserGroups($this->userSession->getUser());
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$userGroups = array_map(function (IGroup $group) { return $group->getGID(); }, $userGroups);
$groups = array_intersect($groups, $userGroups);
}
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foreach ($groups as $gid) {
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if (strtolower($gid) === $search) {
$this->result['exact']['groups'][] = [
'label' => $search,
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'value' => [
'shareType' => Share::SHARE_TYPE_GROUP,
'shareWith' => $search,
],
];
} else {
$this->result['groups'][] = [
'label' => $gid,
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'value' => [
'shareType' => Share::SHARE_TYPE_GROUP,
'shareWith' => $gid,
],
];
}
}
if ($this->offset === 0 && empty($this->result['exact']['groups'])) {
// On page one we try if the search result has a direct hit on the
// user id and if so, we add that to the exact match list
$group = $this->groupManager->get($search);
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if ($group instanceof IGroup && (!$this->shareWithGroupOnly || in_array($group->getGID(), $userGroups))) {
array_push($this->result['exact']['groups'], [
'label' => $group->getGID(),
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'value' => [
'shareType' => Share::SHARE_TYPE_GROUP,
'shareWith' => $group->getGID(),
],
]);
}
}
if (!$this->shareeEnumeration) {
$this->result['groups'] = [];
}
}
/**
* @param string $search
* @return array possible sharees
*/
protected function getRemote($search) {
$this->result['remotes'] = [];
// Search in contacts
//@todo Pagination missing
$addressBookContacts = $this->contactsManager->search($search, ['CLOUD', 'FN']);
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$foundRemoteById = false;
foreach ($addressBookContacts as $contact) {
if (isset($contact['isLocalSystemBook'])) {
continue;
}
if (isset($contact['CLOUD'])) {
$cloudIds = $contact['CLOUD'];
if (!is_array($cloudIds)) {
$cloudIds = [$cloudIds];
}
foreach ($cloudIds as $cloudId) {
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list(, $serverUrl) = $this->splitUserRemote($cloudId);
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if (strtolower($contact['FN']) === $search || strtolower($cloudId) === $search) {
if (strtolower($cloudId) === $search) {
$foundRemoteById = true;
}
$this->result['exact']['remotes'][] = [
'label' => $contact['FN'],
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'value' => [
'shareType' => Share::SHARE_TYPE_REMOTE,
'shareWith' => $cloudId,
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'server' => $serverUrl,
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],
];
} else {
$this->result['remotes'][] = [
'label' => $contact['FN'],
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'value' => [
'shareType' => Share::SHARE_TYPE_REMOTE,
'shareWith' => $cloudId,
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'server' => $serverUrl,
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],
];
}
}
}
}
if (!$this->shareeEnumeration) {
$this->result['remotes'] = [];
}
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if (!$foundRemoteById && substr_count($search, '@') >= 1 && substr_count($search, ' ') === 0 && $this->offset === 0) {
$this->result['exact']['remotes'][] = [
'label' => $search,
'value' => [
'shareType' => Share::SHARE_TYPE_REMOTE,
'shareWith' => $search,
],
];
}
$this->reachedEndFor[] = 'remotes';
}
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/**
* split user and remote from federated cloud id
*
* @param string $address federated share address
* @return array [user, remoteURL]
* @throws \Exception
*/
public function splitUserRemote($address) {
if (strpos($address, '@') === false) {
throw new \Exception('Invalid Federated Cloud ID');
}
// Find the first character that is not allowed in user names
$id = str_replace('\\', '/', $address);
$posSlash = strpos($id, '/');
$posColon = strpos($id, ':');
if ($posSlash === false && $posColon === false) {
$invalidPos = strlen($id);
} else if ($posSlash === false) {
$invalidPos = $posColon;
} else if ($posColon === false) {
$invalidPos = $posSlash;
} else {
$invalidPos = min($posSlash, $posColon);
}
// Find the last @ before $invalidPos
$pos = $lastAtPos = 0;
while ($lastAtPos !== false && $lastAtPos <= $invalidPos) {
$pos = $lastAtPos;
$lastAtPos = strpos($id, '@', $pos + 1);
}
if ($pos !== false) {
$user = substr($id, 0, $pos);
$remote = substr($id, $pos + 1);
$remote = $this->fixRemoteURL($remote);
if (!empty($user) && !empty($remote)) {
return array($user, $remote);
}
}
throw new \Exception('Invalid Federated Cloud ID');
}
/**
* Strips away a potential file names and trailing slashes:
* - http://localhost
* - http://localhost/
* - http://localhost/index.php
* - http://localhost/index.php/s/{shareToken}
*
* all return: http://localhost
*
* @param string $remote
* @return string
*/
protected function fixRemoteURL($remote) {
$remote = str_replace('\\', '/', $remote);
if ($fileNamePosition = strpos($remote, '/index.php')) {
$remote = substr($remote, 0, $fileNamePosition);
}
$remote = rtrim($remote, '/');
return $remote;
}
/**
* @return \OC_OCS_Result
*/
public function search() {
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$search = isset($_GET['search']) ? (string) $_GET['search'] : '';
$itemType = isset($_GET['itemType']) ? (string) $_GET['itemType'] : null;
$page = isset($_GET['page']) ? (int) $_GET['page'] : 1;
$perPage = isset($_GET['perPage']) ? (int) $_GET['perPage'] : 200;
if ($perPage <= 0) {
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return new \OC_OCS_Result(null, Http::STATUS_BAD_REQUEST, 'Invalid perPage argument');
}
if ($page <= 0) {
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return new \OC_OCS_Result(null, Http::STATUS_BAD_REQUEST, 'Invalid page');
}
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$shareTypes = [
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Share::SHARE_TYPE_USER,
Share::SHARE_TYPE_GROUP,
Share::SHARE_TYPE_REMOTE,
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];
if (isset($_GET['shareType']) && is_array($_GET['shareType'])) {
$shareTypes = array_intersect($shareTypes, $_GET['shareType']);
sort($shareTypes);
} else if (isset($_GET['shareType']) && is_numeric($_GET['shareType'])) {
$shareTypes = array_intersect($shareTypes, [(int) $_GET['shareType']]);
sort($shareTypes);
}
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if (in_array(Share::SHARE_TYPE_REMOTE, $shareTypes) && !$this->isRemoteSharingAllowed($itemType)) {
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// Remove remote shares from type array, because it is not allowed.
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$shareTypes = array_diff($shareTypes, [Share::SHARE_TYPE_REMOTE]);
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}
$this->shareWithGroupOnly = $this->config->getAppValue('core', 'shareapi_only_share_with_group_members', 'no') === 'yes';
$this->shareeEnumeration = $this->config->getAppValue('core', 'shareapi_allow_share_dialog_user_enumeration', 'yes') === 'yes';
$this->limit = (int) $perPage;
$this->offset = $perPage * ($page - 1);
return $this->searchSharees($search, $itemType, $shareTypes, $page, $perPage);
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}
/**
* Method to get out the static call for better testing
*
* @param string $itemType
* @return bool
*/
protected function isRemoteSharingAllowed($itemType) {
try {
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$backend = Share::getBackend($itemType);
return $backend->isShareTypeAllowed(Share::SHARE_TYPE_REMOTE);
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} catch (\Exception $e) {
return false;
}
}
/**
* Testable search function that does not need globals
*
* @param string $search
* @param string $itemType
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* @param array $shareTypes
* @param int $page
* @param int $perPage
* @return \OC_OCS_Result
*/
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protected function searchSharees($search, $itemType, array $shareTypes, $page, $perPage) {
// Verify arguments
if ($itemType === null) {
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return new \OC_OCS_Result(null, Http::STATUS_BAD_REQUEST, 'Missing itemType');
}
// Get users
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if (in_array(Share::SHARE_TYPE_USER, $shareTypes)) {
$this->getUsers($search);
}
// Get groups
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if (in_array(Share::SHARE_TYPE_GROUP, $shareTypes)) {
$this->getGroups($search);
}
// Get remote
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if (in_array(Share::SHARE_TYPE_REMOTE, $shareTypes)) {
$this->getRemote($search);
}
$response = new \OC_OCS_Result($this->result);
$response->setItemsPerPage($perPage);
if (sizeof($this->reachedEndFor) < 3) {
$response->addHeader('Link', $this->getPaginationLink($page, [
'search' => $search,
'itemType' => $itemType,
'shareType' => $shareTypes,
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'perPage' => $perPage,
]));
}
return $response;
}
/**
* Generates a bunch of pagination links for the current page
*
* @param int $page Current page
* @param array $params Parameters for the URL
* @return string
*/
protected function getPaginationLink($page, array $params) {
if ($this->isV2()) {
$url = $this->urlGenerator->getAbsoluteURL('/ocs/v2.php/apps/files_sharing/api/v1/sharees') . '?';
} else {
$url = $this->urlGenerator->getAbsoluteURL('/ocs/v1.php/apps/files_sharing/api/v1/sharees') . '?';
}
$params['page'] = $page + 1;
$link = '<' . $url . http_build_query($params) . '>; rel="next"';
return $link;
}
/**
* @return bool
*/
protected function isV2() {
return $this->request->getScriptName() === '/ocs/v2.php';
}
}