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<?php
namespace OCA\OJSXC;
use OCA\OJSXC\Db\IQRosterPush;
use OCA\OJSXC\Db\IQRosterPushMapper;
use OCP\IDBConnection;
use OCP\IGroup;
use OCP\IUserManager;
use OCP\IUser;
use OCP\IUserSession;
class RosterPush
{
/**
* @var IUserManager
*/
private $userManager;
/**
* @var IQRosterPushMapper
*/
private $iqRosterPushMapper;
private $host;
/**
* @var IUserSession
*/
private $userSession;
/**
* @var IDBConnection
*/
private $db;
/**
* @var IUserProvider
*/
private $userProvider;
/**
* RosterPush constructor.
*
* @param IUserManager $userManager
* @param IUserSession $userSession
* @param string $host
* @param IQRosterPushMapper $iqRosterPushMapper
* @param IDBConnection $db
* @param IUserProvider $userProvider
*/
public function __construct(
IUserManager $userManager,
IUserSession $userSession,
$host,
IQRosterPushMapper $iqRosterPushMapper,
IDbConnection $db,
IUserProvider $userProvider
) {
$this->userManager = $userManager;
$this->userSession = $userSession;
$this->host = $host;
$this->iqRosterPushMapper = $iqRosterPushMapper;
$this->db = $db;
$this->userProvider = $userProvider;
}
/**
* @see https://tools.ietf.org/html/rfc6121#section-2.1.6
* @param IUser $user
*/
public function createOrUpdateRosterItem(IUser $user)
{
$iq = new IQRosterPush();
$iq->setJid($user->getUID());
$iq->setName($user->getDisplayName());
$iq->setSubscription('both');
$iq->setFrom('');
foreach ($this->userProvider->getAllUsersForUserByUID($user->getUID()) as $recipient) {
if ($recipient->getUID() !== $user->getUID()) {
$iq->setTo($recipient->getUID());
$this->iqRosterPushMapper->insert($iq);
}
}
}
/**
* @see https://tools.ietf.org/html/rfc6121#section-2.1.6
* @param $userId
*/
public function removeRosterItem($userId)
{
$iq = new IQRosterPush();
$iq->setJid($userId);
$iq->setSubscription('remove');
$iq->setFrom('');
foreach ($this->userManager->search('') as $recipient) {
if ($recipient->getUID() !== $userId) {
$iq->setTo($recipient->getUID());
$this->iqRosterPushMapper->insert($iq);
}
}
}
/**
* @brief performs a completely roster fresh of all users. This will send
* a rosterPush for every existing user and a rosterPush for every
* user which was ever deleted. The deleted user is fetched from the
* `addressbookchanges` table.
*/
public function refreshRoster()
{
$stats = [
"updated" => 0,
"removed" => 0
];
foreach ($this->userManager->search('') as $user) {
$this->createOrUpdateRosterItem($user);
$stats["updated"]++;
}
/**
* Here we look into the addressbookchanges table for deletions
* of "contacts" in the system addressbook. This are actual users of the
* Nextcloud instance. Because this is a private API of Nextcloud it's
* encapsulated in a try/catch block.
*/
try {
$query = "SELECT `id` FROM `*PREFIX*addressbooks` WHERE `principaluri`='principals/system/system' LIMIT 1";
$addressbooks = $this->db->executeQuery($query)->fetchAll();
$id = $addressbooks[0]['id'];
$query = "SELECT `uri` FROM `*PREFIX*addressbookchanges` AS ac1 WHERE `addressbookid` = ? AND `operation` = 3 AND `id`=(SELECT MAX(id) FROM `*PREFIX*addressbookchanges` AS ac2 WHERE `uri`=ac1.uri)"; // we use the subquery to always fetch the latest change
// Fetching all changes
$deletions = $this->db->executeQuery($query, [$id])->fetchAll();
foreach ($deletions as $deletion) {
$userid = $deletion['uri'];
$colonPlace = strpos($userid, ':');
$dotPlace = strrpos($userid, '.');
$userid = substr($userid, $colonPlace + 1, strlen($userid) - $dotPlace - $colonPlace);
$this->removeRosterItem($userid);
$stats["removed"]++;
}
} catch (\Exception $e) {
\OC::$server->getLogger()->logException($e);
}
return $stats;
}
/**
* When a user is removed from a group, the roster items for the $userId must be removed for all users in the $group
* but only if $userId isn't accessible anymore for a user in $group.
*
* @param IGroup $group
* @param string $userId the user which is removed
*/
public function removeRosterItemForUsersInGroup(IGroup $group, $userId)
{
$iq = new IQRosterPush();
$iq->setJid($userId);
$iq->setSubscription('remove');
$iq->setFrom('');
foreach ($group->getUsers() as $recipient) {
// check if $recipient can still chat with $userId
// if not -> remove $userId from $recipient's roster.
if ($recipient->getUID() !== $userId && !$this->userProvider->hasUserForUserByUID($recipient->getUID(), $userId)) {
$iq->setTo($recipient->getUID());
$this->iqRosterPushMapper->insert($iq);
}
}
}
/**
* When a user is added to a group, this user should get a rosterPush for all users in this group
*
* @param IUser $receiver
* @param IGroup $group
*/
public function addUserToGroup(IUser $receiver, IGroup $group)
{
$iq = new IQRosterPush();
$iq->setSubscription('both');
$iq->setFrom('');
$iq->setTo($receiver->getUID());
foreach ($group->getUsers() as $user) {
$iq->setJid($user->getUID());
$iq->setName($user->getDisplayName());
$this->iqRosterPushMapper->insert($iq);
}
}
/**
* When a user is removed from a group, this user should get a rosterPush for all users in this group
*
* @param IUser $receiver
* @param IGroup $group
*/
public function removeUserFromGroup(IUser $receiver, IGroup $group)
{
$iq = new IQRosterPush();
$iq->setSubscription('remove');
$iq->setFrom('');
$iq->setTo($receiver->getUID());
foreach ($group->getUsers() as $user) {
$iq->setJid($user->getUID());
$iq->setName($user->getDisplayName());
$this->iqRosterPushMapper->insert($iq);
}
}
}
|
