/**
* Start a editing session or return an existing one
* @param string $uid of the user starting a session
* @param \OCA\Richdocuments\File $file - file object
* @return array
* @throws \Exception
*/
public static function start($uid, $file)
{
// Create a directory to store genesis
$genesis = new \OCA\Richdocuments\Genesis($file);
$oldSession = new Session();
$oldSession->loadBy('file_id', $file->getFileId());
//If there is no existing session we need to start a new one
if (!$oldSession->hasData()) {
$newSession = new Session(array($genesis->getPath(), $genesis->getHash(), $file->getOwner(), $file->getFileId()));
if (!$newSession->insert()) {
throw new \Exception('Failed to add session into database');
}
}
$sessionData = $oldSession->loadBy('file_id', $file->getFileId())->getData();
$memberColor = \OCA\Richdocuments\Helper::getMemberColor($uid);
$member = new \OCA\Richdocuments\Db\Member([$sessionData['es_id'], $uid, $memberColor, time(), intval($file->isPublicShare()), $file->getToken()]);
if (!$member->insert()) {
throw new \Exception('Failed to add member into database');
}
$sessionData['member_id'] = (string) $member->getLastInsertId();
// Do we have OC_Avatar in out disposal?
if (\OC::$server->getConfig()->getSystemValue('enable_avatars', true) !== true) {
$imageUrl = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAAAAACH5BAAAAAAALAAAAAABAAEAAAICTAEAOw==';
} else {
$imageUrl = $uid;
}
$displayName = $file->isPublicShare() ? $uid . ' ' . \OCA\Richdocuments\Db\Member::getGuestPostfix() : \OC::$server->getUserSession()->getUser()->getDisplayName($uid);
$userId = $file->isPublicShare() ? $displayName : \OC::$server->getUserSession()->getUser()->getUID();
$op = new \OCA\Richdocuments\Db\Op();
$op->addMember($sessionData['es_id'], $sessionData['member_id'], $displayName, $userId, $memberColor, $imageUrl);
$sessionData['title'] = basename($file->getPath());
$sessionData['permissions'] = $file->getPermissions();
return $sessionData;
}
/**
* Create new genesis document
* @param File $file
* */
public function __construct(File $file)
{
$view = $file->getOwnerView();
$path = $file->getPath();
$owner = $file->getOwner();
$this->view = new View('/' . $owner);
if (!$this->view->file_exists(self::DOCUMENTS_DIRNAME)) {
$this->view->mkdir(self::DOCUMENTS_DIRNAME);
}
$this->validate($view, $path);
$this->hash = $view->hash('sha1', $path, false);
$this->path = self::DOCUMENTS_DIRNAME . '/' . $this->hash . '.odt';
if (!$this->view->file_exists($this->path)) {
//copy new genesis to /user/documents/{hash}.odt
// get decrypted content
$content = $view->file_get_contents($path);
$mimetype = $view->getMimeType($path);
$data = Filter::read($content, $mimetype);
$this->view->file_put_contents($this->path, $data['content']);
}
try {
$this->validate($this->view, $this->path);
} catch (\Exception $e) {
throw new \Exception('Failed to copy genesis');
}
}
/**
* Store the document content to its origin
* @NoAdminRequired
*/
public function save()
{
$response = new JSONResponse();
try {
$esId = $this->request->server['HTTP_WEBODF_SESSION_ID'];
$session = $this->loadSession($esId);
$memberId = $this->request->server['HTTP_WEBODF_MEMBER_ID'];
$currentMember = $this->loadMember($memberId, $esId);
// Extra info for future usage
// $sessionRevision = $this->request->server['HTTP_WEBODF_SESSION_REVISION'];
//NB ouch! New document content is passed as an input stream content
$stream = fopen('php://input', 'r');
if (!$stream) {
throw new \Exception('New content missing');
}
$content = stream_get_contents($stream);
try {
if ($currentMember->getIsGuest()) {
$file = File::getByShareToken($currentMember->getToken());
} else {
$file = new File($session->getFileId());
}
$view = $file->getOwnerView(true);
$path = $file->getPath(true);
} catch (\Exception $e) {
//File was deleted or unshared. We need to save content as new file anyway
//Sorry, but for guests it would be lost :(
if ($this->uid) {
$view = new View('/' . $this->uid . '/files');
$dir = \OC::$server->getConfig()->getUserValue($this->uid, 'richdocuments', 'save_path', '');
$path = Helper::getNewFileName($view, $dir . 'New Document.odt');
} else {
throw $e;
}
}
$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)) {
$currentHash = $view->hash('sha1', $path, false);
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
$this->logger->debug('Update hash', ['app' => $this->appName]);
$session->updateGenesisHash($esId, sha1($data['content']));
} else {
// Last user. Kill session data
Db\Session::cleanUp($esId);
}
$view->touch($path);
}
$response->setData(['status' => 'success']);
} catch (\Exception $e) {
$response->setStatus(Http::STATUS_INTERNAL_SERVER_ERROR);
$response->setData([]);
$this->logger->warning('Saving failed. Reason:' . $e->getMessage(), ['app' => $this->appName]);
}
return $response;
}
