827 lines
25 KiB
PHP
827 lines
25 KiB
PHP
<?php
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namespace Api {
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use Driver\SQL\Condition\Compare;
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use Driver\SQL\Condition\CondIn;
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use Driver\SQL\Condition\CondNull;
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use Driver\SQL\SQL;
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use External\ZipStream\BufferWriter;
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use External\ZipStream\File;
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use External\ZipStream\ZipStream;
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abstract class FileAPI extends Request {
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protected function checkDirectory($parentId) {
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if ($parentId === null) {
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return true;
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}
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$sql = $this->user->getSQL();
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$res = $sql->select("directory")
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->from("UserFile")
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->where(new Compare("uid", $parentId))
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->limit(1)
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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if ($this->success) {
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if (empty($res)) {
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return $this->createError("Parent directory not found");
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} else if(!$res[0]["directory"]) {
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return $this->createError("Parent file is not a directory");
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}
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}
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return $this->success;
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}
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protected function downloadFile($name, $path) {
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if (!file_exists($path)) {
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http_response_code(404);
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die("404 - File does not exist anymore");
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} else if(!is_file($path) || !is_readable($path)) {
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die("403 - Unable to download file.");
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} else {
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$mimeType = @mime_content_type($path);
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if ($mimeType) {
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header("Content-Type: $mimeType");
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}
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$name = trim(preg_replace('/\s\s+/', ' ', $name));
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header("Content-Disposition: attachment; filename=$name");
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//No cache
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header('Expires: 0');
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header('Cache-Control: must-revalidate');
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header('Pragma: public');
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//Define file size
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header('Content-Length: ' . filesize($path));
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ob_clean();
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flush();
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readfile($path);
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exit;
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}
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}
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protected function downloadZip($files) {
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if ($files == null || empty($files) || !is_array($files)) {
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return $this->createError("No files to download");
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}
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header('Content-Disposition: attachment; filename="files.zip"');
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header('Content-Type: application/zip');
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$writer = new BufferWriter();
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$writer->registerCallback(function ($w) { echo $w->read(); });
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$zipStream = new ZipStream($writer);
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foreach ($files as $file) {
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$f = new File($file["name"]);
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$f->loadFromFile($file["path"]);
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$zipStream->saveFile($f);
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}
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$zipStream->close();
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exit;
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}
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protected function &findDirectory(&$files, $id) {
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if ($id !== null) {
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$id = (string)$id;
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if (isset($files[$id])) {
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return $files[$id]["items"];
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} else {
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foreach ($files as &$dir) {
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if ($dir["isDirectory"]) {
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$target =& $this->findDirectory($dir["items"], $id);
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if ($target !== $dir["items"]) {
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return $target;
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}
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}
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}
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return $files;
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}
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} else {
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return $files;
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}
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}
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protected function createFileList($res) {
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$files = array();
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foreach ($res as $row) {
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if ($row["uid"] === null) continue;
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$fileId = $row["uid"];
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$parentId = $row["parentId"];
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$fileName = $row["name"];
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$isDirectory = $row["directory"];
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$fileElement = array("uid" => $fileId, "name" => $fileName, "isDirectory" => $isDirectory);
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if ($isDirectory) {
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$fileElement["items"] = array();
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} else {
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$fileElement["size"] = @filesize($row["path"]);
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$fileElement["mimeType"] = @mime_content_type($row["path"]);
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}
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$dir =& $this->findDirectory($files, $parentId);
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$dir[$fileId] = $fileElement;
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unset($dir);
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}
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return $files;
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}
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protected function filterFiles(SQL $sql, $query, $id, $token = null) {
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if (is_array($id)) {
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$query->where(new CondIn("UserFile.uid", $id));
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} else {
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$query->where(new Compare("UserFile.uid", $id));
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}
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if (is_null($token)) {
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$query->where(new Compare("user_id", $this->user->getId()));
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} else {
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$query->innerJoin("UserFileTokenFile", "UserFile.uid", "file_id")
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->innerJoin("UserFileToken", "UserFileToken.uid", "token_id")
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->where(new Compare("token", $token))
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->where(new CondNull("valid_until"), new Compare("valid_until", $sql->now(), ">="));
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}
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}
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}
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}
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namespace Api\File {
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use Api\FileAPI;
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use Api\Parameter\ArrayType;
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use Api\Parameter\Parameter;
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use Api\Parameter\StringType;
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use Driver\SQL\Condition\Compare;
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use Driver\SQL\Condition\CondIn;
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use Driver\SQL\Condition\CondNull;
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use Objects\User;
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class ValidateToken extends FileAPI {
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public function __construct(User $user, bool $externalCall = false) {
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parent::__construct($user, $externalCall, array(
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'token' => new StringType('token', 36, false)
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));
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$this->csrfTokenRequired = false;
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}
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public function execute($values = array()) {
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if (!parent::execute($values)) {
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return false;
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}
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$sql = $this->user->getSQL();
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$token = $this->getParam("token");
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$res = $sql->select("UserFile.uid", "valid_until", "token_type",
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"maxFiles", "maxSize", "extensions", "name", "path", "directory", "parent_id as parentId")
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->from("UserFileToken")
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->leftJoin("UserFileTokenFile", "UserFileToken.uid", "token_id")
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->leftJoin("UserFile", "UserFile.uid", "file_id")
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->where(new Compare("token", $token))
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->where(new CondNull("valid_until"), new Compare("valid_until", $sql->now(), ">="))
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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if ($this->success) {
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if (empty($res)) {
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return $this->createError("Invalid Token");
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} else {
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$row = $res[0];
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$this->result["token"] = array(
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"type" => $row["token_type"],
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"valid_until" => $row["valid_until"]
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);
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$this->result["files"] = $this->createFileList($res);
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/*foreach ($res as $row) {
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if ($row["uid"]) {
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$file = array(
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"isDirectory" => $row["directory"],
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"name" => $row["name"],
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"uid" => $row["uid"]
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);
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if ($file["isDirectory"]) {
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$file["items"] = array();
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} else {
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$file["size"] = @filesize($row["path"]);
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$file["mimeType"] = @mime_content_type($row["path"]);
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}
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$this->result["files"][] = $file;
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}
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}*/
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if ($row["token_type"] === "upload") {
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$this->result["restrictions"] = array(
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"maxFiles" => $row["maxFiles"] ?? 0,
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"maxSize" => $row["maxSize"] ?? 0,
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"extensions" => $row["extensions"] ?? ""
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);
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}
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}
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}
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return $this->success;
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}
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}
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class RevokeToken extends FileAPI {
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public function __construct(User $user, bool $externalCall = false) {
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parent::__construct($user, $externalCall, array(
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"token" => new StringType("token", 36)
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));
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$this->loginRequired = true;
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$this->csrfTokenRequired = true;
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}
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public function execute($values = array()) {
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if (!parent::execute($values)) {
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return false;
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}
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$sql = $this->user->getSQL();
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$token = $this->getParam("token");
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$res = $sql->select($sql->count())
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->from("UserFileToken")
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->where(new Compare("user_id", $this->user->getId()))
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->where(new Compare("token", $token))
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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if ($this->success) {
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if(empty($res)) {
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return $this->createError("Invalid token");
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} else {
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$res = $sql->update("UserFileToken")
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->set("valid_until", new \DateTime())
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->where(new Compare("user_id", $this->user->getId()))
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->where(new Compare("token", $token))
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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}
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}
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return $this->success;
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}
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}
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class ListFiles extends FileAPI {
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public function __construct(User $user, bool $externalCall = false) {
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parent::__construct($user, $externalCall, array(
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"directory" => new Parameter("directory", Parameter::TYPE_INT, true, null)
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));
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$this->loginRequired = true;
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$this->csrfTokenRequired = false;
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}
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public function execute($values = array()) {
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if (!parent::execute($values)) {
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return false;
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}
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$sql = $this->user->getSQL();
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$res = $sql->select(
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"UserFile.uid", "UserFile.directory", "UserFile.path", "UserFile.name",
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"UserFile.user_id", "parentTable.uid as parentId", "parentTable.name as parentName")
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->from("UserFile")
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->leftJoin("UserFile", "UserFile.parent_id", "parentTable.uid", "parentTable")
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->where(new Compare("UserFile.user_id", $this->user->getId()))
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->orderBy("UserFile.parent_id")
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->ascending()
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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if ($this->success) {
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$files = $this->createFileList($res);
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$directoryId = $this->getParam("directory");
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if (!is_null($directoryId)) {
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$wantedDir =& $this->findDirectory($files, $directoryId);
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if ($files === $wantedDir) {
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$files = array();
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} else {
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$files = $wantedDir;
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}
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}
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$this->result["files"] = $files;
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}
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return $this->success;
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}
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}
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class ListTokens extends FileAPI {
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public function __construct(User $user, bool $externalCall = false) {
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parent::__construct($user, $externalCall, array());
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$this->loginRequired = true;
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$this->csrfTokenRequired = false;
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}
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public function execute($values = array()) {
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if (!parent::execute($values)) {
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return false;
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}
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$sql = $this->user->getSQL();
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$res = $sql->select("uid","token","valid_until","token_type", "maxFiles", "maxSize", "extensions")
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->from("UserFileToken")
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->orderBy("valid_until")
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->descending()
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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if ($this->success) {
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$this->result["tokens"] = array();
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foreach ($res as $row) {
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$tokenType = $row["token_type"];
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if ($tokenType !== "upload") {
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unset($row["maxFiles"]);
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unset($row["maxSize"]);
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unset($row["extensions"]);
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}
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unset($row["token_type"]);
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$row["type"] = $tokenType;
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$this->result["tokens"][] = $row;
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}
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}
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return $this->success;
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}
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}
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class CreateDirectory extends FileAPI {
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public function __construct(User $user, bool $externalCall = false) {
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parent::__construct($user, $externalCall, array(
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'name' => new StringType('name', 32),
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'parentId' => new Parameter('parentId', Parameter::TYPE_INT, true, null)
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));
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$this->loginRequired = true;
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}
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public function execute($values = array()) {
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if (!parent::execute($values)) {
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return false;
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}
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$sql = $this->user->getSQL();
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$name = $this->getParam('name');
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$parentId = $this->getParam("parentId");
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if (!$this->checkDirectory($parentId)) {
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return $this->success;
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}
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$res = $sql->insert("UserFile", array("directory", "name", "user_id", "parent_id"))
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->addRow(true, $name, $this->user->getId(), $parentId)
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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return $this->success;
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}
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}
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class Rename extends FileAPI { }
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class Move extends FileAPI { }
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class Upload extends FileAPI {
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public function __construct(User $user, bool $externalCall = false) {
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parent::__construct($user, $externalCall, array(
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'parentId' => new Parameter('parentId', Parameter::TYPE_INT, true, null),
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'token' => new StringType('token', 36, true, null)
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));
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$this->csrfTokenRequired = false;
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}
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public function execute($values = array()) {
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if (!parent::execute($values)) {
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return false;
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}
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$token = $this->getParam("token");
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if (!$this->user->isLoggedIn() && is_null($token)) {
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return $this->createError("Permission denied (expected token)");
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}
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$sql = $this->user->getSQL();
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$parentId = $this->getParam("parentId");
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if (!is_null($token) && !is_null($parentId)) {
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return $this->createError("Cannot upload to parent directory using token");
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}
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if (!is_null($parentId) && !$this->checkDirectory($parentId)) {
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return $this->success;
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}
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$fileKeys = array_keys($_FILES);
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$numFilesUploaded = count($fileKeys);
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if (!is_null($token)) {
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$res = $sql->select("uid", "token_type", "maxFiles", "maxSize", "extensions", "user_id")
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->from("UserFileToken")
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->where(new Compare("token", $token))
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->where(new CondNull("valid_until"), new Compare("valid_until", $sql->now(), ">="))
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->limit(1)
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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if (!$this->success) {
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return false;
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}
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if (empty($res) || $res[0]["token_type"] !== "upload") {
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return $this->createError("Permission denied (token)");
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}
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$tokenId = $res[0]["uid"];
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$maxFiles = $res[0]["maxFiles"] ?? 0;
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$maxSize = $res[0]["maxSize"] ?? 0;
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$userId = $res[0]["user_id"];
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$extensions = explode(",", trim(strtolower($res[0]["extensions"] ?? "")));
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$extensions = array_filter($extensions);
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$res = $sql->select($sql->count())
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->from("UserFileTokenFile")
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->where(new Compare("token_id", $tokenId))
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->execute();
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$this->success = ($res !== false);
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$this->lastError = $sql->getLastError();
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if (!$this->success) {
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return false;
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}
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$count = $res[0]["count"];
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if ($maxFiles > 0 && $numFilesUploaded > 0 && $numFilesUploaded + $count > $maxFiles) {
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return $this->createError("File limit exceeded. Currently uploaded $count / $maxFiles files");
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}
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if ($maxSize > 0 || !empty($extensions)) {
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foreach ($_FILES as $file) {
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$name = $file["name"];
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if ($maxSize > 0 && $file["size"] > $maxSize) {
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return $this->createError("File Size limit of $maxSize bytes exceeded for file $name");
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}
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$dotPos = strrpos($name, ".");
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$ext = ($dotPos !== false ? strtolower(substr($name, $dotPos + 1)) : false);
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if (!empty($extensions) && $ext !== false && !in_array($ext, $extensions)) {
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return $this->createError("File '$name' has prohibited extension. Allowed extensions: " . implode(",", $extensions));
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}
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}
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}
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} else {
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$userId = $this->user->getId();
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}
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if ($numFilesUploaded === 0) {
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return $this->createError("No file uploaded");
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}
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$uploadDir = realpath($_SERVER["DOCUMENT_ROOT"] . "/files/uploaded/");
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if (!is_writable($uploadDir)) {
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return $this->createError("Upload directory is not writable");
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}
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$fileIds = array();
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foreach ($_FILES as $key => $file) {
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$fileName = $file["name"];
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$tmpPath = $file["tmp_name"];
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if (!$tmpPath) {
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return $this->createError("Error uploading file: $fileName");
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}
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$md5Hash = @hash_file('md5', $tmpPath);
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$sha1Hash = @hash_file('sha1', $tmpPath);
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$filePath = $uploadDir . "/" . $md5Hash . $sha1Hash;
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if (move_uploaded_file($tmpPath, $filePath)) {
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$res = $sql->insert("UserFile", array("name", "directory", "path", "user_id", "parent_id"))
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->addRow($fileName, false, $filePath, $userId, $parentId)
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->returning("uid")
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->execute();
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if ($res === false) {
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$this->lastError = $sql->getLastError();
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$this->success = false;
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return false;
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} else {
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$fileIds[] = $sql->getLastInsertId();
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}
|
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} else {
|
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return $this->createError("Could not create file: " . $fileName);
|
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}
|
|
}
|
|
|
|
if (!is_null($token)) {
|
|
$query = $sql->insert("UserFileTokenFile", array("file_id", "token_id"));
|
|
foreach ($fileIds as $fileId) {
|
|
$query->addRow($fileId, $tokenId);
|
|
}
|
|
|
|
$res = $query->execute();
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
}
|
|
|
|
return $this->success;
|
|
}
|
|
}
|
|
|
|
class Download extends FileAPI {
|
|
|
|
public function __construct(User $user, bool $externalCall = false) {
|
|
parent::__construct($user, $externalCall, array(
|
|
"id" => new ArrayType("id", Parameter::TYPE_INT, true),
|
|
"token" => new StringType("token", 36, true, null)
|
|
));
|
|
$this->csrfTokenRequired = false;
|
|
}
|
|
|
|
public function execute($values = array()) {
|
|
if (!parent::execute($values)) {
|
|
return false;
|
|
}
|
|
|
|
$token = $this->getParam("token");
|
|
if (!$this->user->isLoggedIn() && is_null($token)) {
|
|
return $this->createError("Permission denied (expected token)");
|
|
}
|
|
|
|
$sql = $this->user->getSQL();
|
|
$fileIds = array_unique($this->getParam("id"));
|
|
$query = $sql->select("UserFile.uid", "path", "name", "directory")->from("UserFile");
|
|
$this->filterFiles($sql, $query, $fileIds, $token);
|
|
|
|
$res = $query->execute();
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
|
|
if ($this->success) {
|
|
$foundFiles = array();
|
|
foreach ($res as $row) {
|
|
$foundFiles[$row["uid"]] = $row;
|
|
}
|
|
|
|
$filesToDownload = array();
|
|
foreach ($fileIds as $fileId) {
|
|
if (!array_key_exists($fileId, $foundFiles)) {
|
|
if (is_null($token)) {
|
|
return $this->createError("File not found: $fileId");
|
|
} else {
|
|
return $this->createError("Permission denied (token)");
|
|
}
|
|
} else if (!$foundFiles[$fileId]["directory"]) {
|
|
$filesToDownload[] = $foundFiles[$fileId];
|
|
}
|
|
}
|
|
|
|
if (empty($filesToDownload)) {
|
|
return $this->createError("No file selected");
|
|
} else if (count($filesToDownload) === 1) {
|
|
$file = array_shift($filesToDownload);
|
|
$path = $file["path"];
|
|
$name = $file["name"];
|
|
$this->downloadFile($name, $path);
|
|
} else {
|
|
$this->downloadZip($filesToDownload);
|
|
}
|
|
}
|
|
|
|
return $this->success;
|
|
}
|
|
}
|
|
|
|
class Delete extends FileAPI {
|
|
|
|
public function __construct(User $user, bool $externalCall = false) {
|
|
parent::__construct($user, $externalCall, array(
|
|
"id" => new ArrayType("id", Parameter::TYPE_INT, true),
|
|
"token" => new StringType("token", 36, true, null)
|
|
));
|
|
$this->csrfTokenRequired = true;
|
|
}
|
|
|
|
public function execute($values = array()) {
|
|
if (!parent::execute($values)) {
|
|
return false;
|
|
}
|
|
|
|
$token = $this->getParam("token");
|
|
if (!$this->user->isLoggedIn() && is_null($token)) {
|
|
return $this->createError("Permission denied (expected token)");
|
|
}
|
|
|
|
$sql = $this->user->getSQL();
|
|
$fileIds = array_unique($this->getParam("id"));
|
|
|
|
$query = $sql->select("UserFile.uid", "path", "name")->from("UserFile");
|
|
$this->filterFiles($sql, $query, $fileIds, $token);
|
|
$res = $query->execute();
|
|
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
|
|
if ($this->success) {
|
|
if (count($res) !== count($fileIds)) {
|
|
$foundFiles = array_map(function ($row) { return $row["uid"]; }, $res);
|
|
foreach($fileIds as $fileId) {
|
|
if (!in_array($fileId, $foundFiles)) {
|
|
return $this->createError("File not found: $fileId");
|
|
}
|
|
}
|
|
} else {
|
|
$res = $sql->delete("UserFile")
|
|
->where(new CondIn("uid", $fileIds))
|
|
->execute();
|
|
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
}
|
|
}
|
|
|
|
return $this->success;
|
|
}
|
|
}
|
|
|
|
class CreateUploadToken extends FileAPI {
|
|
public function __construct(User $user, bool $externalCall = false) {
|
|
parent::__construct($user, $externalCall, array(
|
|
"maxFiles" => new Parameter("maxFiles", Parameter::TYPE_INT, true, 1),
|
|
"maxSize" => new Parameter("maxSize", Parameter::TYPE_INT, true, null),
|
|
"extensions" => new StringType("extensions", 64, true, null),
|
|
"durability" => new Parameter("durability", Parameter::TYPE_INT, true, 60*24*2)
|
|
));
|
|
$this->loginRequired = true;
|
|
$this->csrfTokenRequired = false;
|
|
}
|
|
|
|
public function execute($values = array()) {
|
|
if (!parent::execute($values)) {
|
|
return false;
|
|
}
|
|
|
|
$maxFiles = $this->getParam("maxFiles");
|
|
$maxSize = $this->getParam("maxSize");
|
|
$extensions = $this->getParam("extensions");
|
|
$durability = $this->getParam("durability");
|
|
|
|
if (!is_null($maxFiles) && $maxFiles < 0) {
|
|
return $this->createError("Invalid number of maximum files.");
|
|
}
|
|
|
|
if (!is_null($maxSize) && $maxSize < 0) {
|
|
return $this->createError("Invalid maximum size for uploaded files.");
|
|
}
|
|
|
|
if (!is_null($durability) && $durability < 0) {
|
|
return $this->createError("Invalid durability.");
|
|
}
|
|
|
|
if (!is_null($extensions)) {
|
|
$extensions = explode(",",$extensions);
|
|
foreach ($extensions as $i => $ext) {
|
|
if (strlen($ext) === 0 || (strlen($ext) === 1 && $ext[0] === ".")) {
|
|
unset ($extensions[$i]);
|
|
} else if ($ext[0] === ".") {
|
|
$extensions[$i] = substr($ext, 1);
|
|
}
|
|
}
|
|
$extensions = implode(",", $extensions);
|
|
}
|
|
|
|
$sql = $this->user->getSQL();
|
|
$token = generateRandomString(36);
|
|
$validUntil = $durability == 0 ? null : (new \DateTime())->modify("+$durability MINUTES");
|
|
$res = $sql->insert("UserFileToken",
|
|
array("token", "token_type", "maxSize", "maxFiles", "extensions", "valid_until", "user_id"))
|
|
->addRow($token, "upload", $maxSize, $maxFiles, $extensions, $validUntil, $this->user->getId())
|
|
->returning("uid")
|
|
->execute();
|
|
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
|
|
if ($this->success) {
|
|
$this->result["token"] = $token;
|
|
$this->result["tokenId"] = $sql->getLastInsertId();
|
|
}
|
|
|
|
return $this->success;
|
|
}
|
|
}
|
|
|
|
class CreateDownloadToken extends FileAPI {
|
|
|
|
public function __construct(User $user, bool $externalCall = false) {
|
|
parent::__construct($user, $externalCall, array(
|
|
"durability" => new Parameter("durability", Parameter::TYPE_INT, true, 60*24*2),
|
|
"files" => new Parameter("files", Parameter::TYPE_ARRAY, false)
|
|
));
|
|
$this->loginRequired = true;
|
|
$this->csrfTokenRequired = false;
|
|
}
|
|
|
|
public function execute($values = array()) {
|
|
if (!parent::execute($values)) {
|
|
return false;
|
|
}
|
|
|
|
$durability = $this->getParam("durability");
|
|
$fileIds = $this->getParam("files");
|
|
|
|
if (!is_null($durability) && $durability < 0) {
|
|
return $this->createError("Invalid durability.");
|
|
}
|
|
|
|
foreach ($fileIds as $fileId) {
|
|
if (!is_int($fileId) && is_numeric($fileId)) {
|
|
$fileId = intval($fileId);
|
|
}
|
|
if (!is_int($fileId) || $fileId < 1) {
|
|
return $this->createError("Invalid file id: $fileId");
|
|
}
|
|
}
|
|
|
|
$fileIds = array_unique($fileIds);
|
|
|
|
// Check for files:
|
|
$sql = $this->user->getSQL();
|
|
$res = $sql->select("uid")
|
|
->from("UserFile")
|
|
->where(new CondIn("uid", $fileIds))
|
|
->execute();
|
|
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
if (!$this->success) {
|
|
return false;
|
|
}
|
|
|
|
if (count($res) !== count($fileIds)) {
|
|
$foundFiles = array_map(function ($row) { return $row["uid"]; }, $res);
|
|
foreach ($fileIds as $fileId) {
|
|
if (!in_array($fileId, $foundFiles)) {
|
|
return $this->createError("File not found: $fileId");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Insert
|
|
$token = generateRandomString(36);
|
|
$validUntil = $durability == 0 ? null : (new \DateTime())->modify("+$durability MINUTES");
|
|
$res = $sql->insert("UserFileToken", array("token_type", "valid_until", "user_id", "token"))
|
|
->addRow("download", $validUntil, $this->user->getId(), $token)
|
|
->returning("uid")
|
|
->execute();
|
|
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
if (!$this->success) {
|
|
return false;
|
|
}
|
|
|
|
$tokenId = $sql->getLastInsertId();
|
|
$query = $sql->insert("UserFileTokenFile", array("token_id", "file_id"));
|
|
foreach ($fileIds as $fileId) {
|
|
$query->addRow($tokenId, $fileId);
|
|
}
|
|
|
|
$res = $query->execute();
|
|
$this->success = ($res !== false);
|
|
$this->lastError = $sql->getLastError();
|
|
|
|
if ($this->success) {
|
|
$this->result["token"] = $token;
|
|
}
|
|
|
|
return $this->success;
|
|
}
|
|
}
|
|
}
|