/**
* Start a editing session or return an existing one
* @param string $uid of the user starting a session
* @param \OCA\Documents\File $file - file object
* @return array
* @throws \Exception
*/
public static function start($uid, File $file)
{
list($ownerView, $path) = $file->getOwnerViewAndPath();
// Create a directory to store genesis
$genesis = new Genesis($ownerView, $path, $file->getOwner());
$oldSession = new Db_Session();
$oldSession->loadBy('file_id', $file->getFileId());
//If there is no existing session we need to start a new one
if (!$oldSession->hasData()) {
$newSession = new Db_Session(array($genesis->getPath(), $genesis->getHash(), $file->getOwner(), $file->getFileId()));
if (!$newSession->insert()) {
throw new \Exception('Failed to add session into database');
}
}
$session = $oldSession->loadBy('file_id', $file->getFileId())->getData();
$memberColor = Helper::getRandomColor();
$member = new Db_Member(array($session['es_id'], $uid, $memberColor, time()));
if ($member->insert()) {
// Do we have OC_Avatar in out disposal?
if (!class_exists('\\OC_Avatar') || \OC_Config::getValue('enable_avatars', true) !== true) {
//$x['avatar_url'] = \OCP\Util::linkToRoute('documents_user_avatar');
$imageUrl = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAAAAACH5BAAAAAAALAAAAAABAAEAAAICTAEAOw==';
} else {
// https://github.com/owncloud/documents/issues/51
// Temporary stub
$imageUrl = $uid;
/*
$avatar = new \OC_Avatar($uid);
$image = $avatar->get(64);
// User has an avatar
if ($image instanceof \OC_Image) {
$imageUrl = \OC_Helper::linkToRoute(
'core_avatar_get',
array( 'user' => $uid, 'size' => 64)
) . '?requesttoken=' . \OC::$session->get('requesttoken');
} else {
//shortcircuit if it's not an image
$imageUrl = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAAAAACH5BAAAAAAALAAAAAABAAEAAAICTAEAOw==';
}
*/
}
$session['member_id'] = (string) $member->getLastInsertId();
$op = new Db_Op();
$op->addMember($session['es_id'], $session['member_id'], \OCP\User::getDisplayName($uid), $memberColor, $imageUrl);
} else {
throw new \Exception('Failed to add member into database');
}
$session['permissions'] = $ownerView->getFilePermissions($path);
return $session;
}
/**
* Store the document content to its origin
*/
public static function save()
{
try {
$esId = @$_SERVER['HTTP_WEBODF_SESSION_ID'];
if (!$esId) {
throw new \Exception('Session id can not be empty');
}
$memberId = @$_SERVER['HTTP_WEBODF_MEMBER_ID'];
$currentMember = new Db\Member();
$currentMember->load($memberId);
if (is_null($currentMember->getIsGuest()) || $currentMember->getIsGuest()) {
self::preDispatchGuest();
} else {
$uid = self::preDispatch();
}
//check if member belongs to the session
if ($esId != $currentMember->getEsId()) {
throw new \Exception($memberId . ' does not belong to session ' . $esId);
}
// Extra info for future usage
// $sessionRevision = Helper::getArrayValueByKey($_SERVER, 'HTTP_WEBODF_SESSION_REVISION');
$stream = fopen('php://input', 'r');
if (!$stream) {
throw new \Exception('New content missing');
}
$content = stream_get_contents($stream);
$session = new Db\Session();
$session->load($esId);
if (!$session->getEsId()) {
throw new \Exception('Session does not exist');
}
try {
if ($currentMember->getIsGuest()) {
$file = File::getByShareToken($currentMember->getToken());
} else {
$file = new File($session->getFileId());
}
list($view, $path) = $file->getOwnerViewAndPath(true);
} catch (\Exception $e) {
//File was deleted or unshared. We need to save content as new file anyway
//Sorry, but for guests it would be lost :(
if (isset($uid)) {
$view = new \OC\Files\View('/' . $uid . '/files');
$dir = \OCP\Config::getUserValue(\OCP\User::getUser(), 'documents', 'save_path', '');
$path = Helper::getNewFileName($view, $dir . 'New Document.odt');
}
}
$member = new Db\Member();
$members = $member->getActiveCollection($esId);
$memberIds = array_map(function ($x) {
return $x['member_id'];
}, $members);
// Active users except current user
$memberCount = count($memberIds) - 1;
if ($view->file_exists($path)) {
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
$currentHash = sha1($view->file_get_contents($path));
\OC_FileProxy::$enabled = $proxyStatus;
if (!Helper::isVersionsEnabled() && $currentHash !== $session->getGenesisHash()) {
// Original file was modified externally. Save to a new one
$path = Helper::getNewFileName($view, $path, '-conflict');
}
$mimetype = $view->getMimeType($path);
} else {
$mimetype = Storage::MIMETYPE_LIBREOFFICE_WORDPROCESSOR;
}
$data = Filter::write($content, $mimetype);
if ($view->file_put_contents($path, $data['content'])) {
// Not a last user
if ($memberCount > 0) {
// Update genesis hash to prevent conflicts
Helper::debugLog('Update hash');
$session->updateGenesisHash($esId, sha1($data['content']));
} else {
// Last user. Kill session data
Db\Session::cleanUp($esId);
}
$view->touch($path);
}
\OCP\JSON::success();
} catch (\Exception $e) {
Helper::warnLog('Saving failed. Reason:' . $e->getMessage());
//\OCP\JSON::error(array('message'=>$e->getMessage()));
\OC_Response::setStatus(500);
}
exit;
}
/**
* Store the document content to its origin
*/
public static function save()
{
try {
$esId = @$_SERVER['HTTP_WEBODF_SESSION_ID'];
if (!$esId) {
throw new \Exception('Session id can not be empty');
}
$memberId = @$_SERVER['HTTP_WEBODF_MEMBER_ID'];
$sessionRevision = @$_SERVER['HTTP_WEBODF_SESSION_REVISION'];
$stream = fopen('php://input', 'r');
if (!$stream) {
throw new \Exception('New content missing');
}
$content = stream_get_contents($stream);
$session = new Db_Session();
$session->load($esId);
if (!$session->hasData()) {
throw new \Exception('Session does not exist');
}
$sessionData = $session->getData();
$file = new File($sessionData['file_id']);
if (!$file->isPublicShare()) {
self::preDispatch();
} else {
self::preDispatchGuest();
}
list($view, $path) = $file->getOwnerViewAndPath();
$isWritable = $view->file_exists($path) && $view->isUpdatable($path) || $view->isCreatable($path);
if (!$isWritable) {
throw new \Exception($path . ' does not exist or is not writable for user ' . $uid);
}
$member = new Db_Member();
$members = $member->getActiveCollection($esId);
$memberIds = array_map(function ($x) {
return $x['member_id'];
}, $members);
//check if member belongs to the session
if (!in_array($memberId, $memberIds)) {
throw new \Exception($memberId . ' does not belong to session ' . $esId);
}
// Active users except current user
$memberCount = count($memberIds) - 1;
if ($view->file_exists($path)) {
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
$currentHash = sha1($view->file_get_contents($path));
\OC_FileProxy::$enabled = $proxyStatus;
if (!Helper::isVersionsEnabled() && $currentHash !== $sessionData['genesis_hash']) {
// Original file was modified externally. Save to a new one
$path = Helper::getNewFileName($view, $path, '-conflict');
}
}
if ($view->file_put_contents($path, $content)) {
// Not a last user
if ($memberCount > 0) {
// Update genesis hash to prevent conflicts
Helper::debugLog('Update hash');
$session->updateGenesisHash($esId, sha1($content));
} else {
// Last user. Kill session data
Db_Session::cleanUp($esId);
}
$view->touch($path);
}
\OCP\JSON::success();
exit;
} catch (\Exception $e) {
Helper::warnLog('Saving failed. Reason:' . $e->getMessage());
\OCP\JSON::error(array('message' => $e->getMessage()));
exit;
}
}
