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<?php
namespace App\Services;
use App\Core\Database;
use App\Helpers\CacheHelper;
use App\Helpers\CoreHelper;
use App\Helpers\FileHelper;
use App\Helpers\TranslateHelper;
use App\Helpers\ValidationHelper;
use App\Models\File;
class ZipFile
{
public $zip = null;
public $fullZipPathAndFilename = null;
public $tmpLocalCachePath = null;
public $tmpLocalFullPath = null;
// set max filesize allowed for each file, 500MB
public $maxPermittedEachFileBytes = 1024 * 1024 * 500;
function __construct($zipFilename) {
$this->zip = new \ZipArchive();
$zipStoragePath = CACHE_DIRECTORY_ROOT . '/zip';
if (!is_dir($zipStoragePath)) {
mkdir($zipStoragePath);
}
$this->fullZipPathAndFilename = $zipStoragePath . '/' . $zipFilename . '.zip';
if (file_exists($this->fullZipPathAndFilename)) {
@unlink($this->fullZipPathAndFilename);
}
// create tmp local directory for tmp files
$this->tmpLocalCachePath = 'zip/_tmp/' . $zipFilename;
$this->tmpLocalFullPath = CACHE_DIRECTORY_ROOT . '/' . $this->tmpLocalCachePath . '/';
// make sure the folder path exists
CoreHelper::checkCreateDirectory($this->tmpLocalFullPath);
// setup zip
if ($this->zip->open($this->fullZipPathAndFilename, \ZipArchive::CREATE) !== true) {
echo TranslateHelper::t('account_home_failed_creating_zip_file', 'Error: Failed creating zip file: ' . $this->fullZipPathAndFilename);
exit;
}
}
public function addFileAndFolders($folderData, $baseFolderName = '') {
foreach ($folderData AS $folderItem) {
// add directory
$this->zip->addEmptyDir($baseFolderName . $folderItem['basePath'] . $folderItem['folderName']);
// check for subfolders
if ((isset($folderItem['folders'])) && (count($folderItem['folders']))) {
$this->addFileAndFolders($folderItem['folders'], $baseFolderName);
}
// output progress
self::outputBufferToScreen(TranslateHelper::t('account_home_added_folder_to_zip', '- Added folder ') . $baseFolderName . $folderItem['basePath'] . $folderItem['folderName'] . '/');
// add files into directory
$this->addFilesTopZip($folderItem, $baseFolderName . $folderItem['basePath'] . $folderItem['folderName'] . '/');
}
}
public function close() {
// save the zip
$this->zip->close();
// remove any temp files
if(file_exists($this->tmpLocalFullPath)) {
CacheHelper::removeCacheSubFolder($this->tmpLocalCachePath);
}
}
public function getFullFilePath() {
return $this->fullZipPathAndFilename;
}
public function addFilesTopZip($loopBaseData, $basePath = '') {
if (empty($loopBaseData['files'])) {
return true;
}
foreach ($loopBaseData['files'] AS $file) {
$this->addSingleFileToZip($file, $basePath);
}
return true;
}
public function addSingleFileToZip($file, $basePath = '') {
// make sure filesize is less than $this->maxPermittedEachFileBytes
if ($file->getPrimaryFileSize() > $this->maxPermittedEachFileBytes) {
// output progress
self::outputBufferToScreen(TranslateHelper::t('account_home_file_item_too_large_for_zip', '- File is too large to include in zip file ([[[FILE_NAME]]], [[[FILE_SIZE_FORMATTED]]])', array('FILE_NAME' => $basePath . $file->originalFilename, 'FILE_SIZE_FORMATTED' => CoreHelper::formatSize($file->fileSize))), 'red');
return false;
}
// output progress
self::outputBufferToScreen(TranslateHelper::t('account_home_getting', '- Getting ') . $basePath . $file->originalFilename . ' (' . CoreHelper::formatSize($file->getPrimaryFileSize()) . ') ...', null, ' ');
// if file is stored locally, add by file path
$rs = false;
if ($file->fileIsOnCurrentServer() === true) {
// output progress
self::outputBufferToScreen('Done. Adding to zip file...', null, ' ');
// add file to zip from the file system
$rs = $this->zip->addFile($file->getFullFilePath(), $basePath . $file->originalFilename);
}
else {
// download to temp local file while creating the zip
$tmpLocalFile = $this->tmpLocalFullPath . md5($file->id . microtime());
// load based on download token, create download url without any IP restrictions
$downloadUrl = $file->generateDirectDownloadUrlForMedia(false);
// get file content
CoreHelper::getRemoteUrlContent($downloadUrl, $tmpLocalFile);
if (file_exists($tmpLocalFile)) {
// output progress
self::outputBufferToScreen('Done. Adding to zip file...', null, ' ');
// add file to zip
$rs = $this->zip->addFile($tmpLocalFile, $basePath . $file->originalFilename);
}
else {
// output progress
self::outputBufferToScreen('Error: Failed getting file contents (' . $file->originalFilename . ').', 'red');
}
}
if ($rs) {
// output progress
self::outputBufferToScreen('File added.', 'green');
}
else {
// output progress
self::outputBufferToScreen('Error: Failed adding \'' . $file->originalFilename . '\' to zip file.', 'red');
}
}
static function getFolderStructureAsArray($rootFolderId, $startFolderId, $currentUserId = null, $basePathStr = '') {
// setup database
$db = Database::getDatabase();
// load folder infomation
$folderData = $db->getRow('SELECT folderName, parentId, userId '
. 'FROM file_folder '
. 'WHERE id = ' . (int) $startFolderId . ' '
. 'LIMIT 1');
if ($currentUserId === null) {
$currentUserId = $folderData['userId'];
}
// get file data
$fileData = [];
$fileData[$folderData['folderName']] = array(
'files' => FileHelper::loadAllActiveByFolderId($startFolderId),
'folderName' => $folderData['folderName'],
'basePath' => $basePathStr,
'folders' => array(),
);
// get child folders and files
$subArr = [];
$folders = $db->getRows('SELECT id '
. 'FROM file_folder '
. 'WHERE parentId = ' . (int) $startFolderId . ' '
. 'AND (userId = ' . (int) $currentUserId . ' '
. 'OR (file_folder.id IN (SELECT folder_id FROM file_folder_share LEFT JOIN file_folder_share_item ON file_folder_share.id = file_folder_share_item.file_folder_share_id WHERE file_folder_share.shared_with_user_id = ' . (int) $currentUserId . ' '
. 'AND share_permission_level IN ("upload_download", "all")))'
. ') '
. 'ORDER BY folderName');
if ($folders) {
foreach ($folders AS $folder) {
$rs = self::getFolderStructureAsArray($rootFolderId, $folder['id'], $currentUserId, ($startFolderId != $rootFolderId ? ($basePathStr . $folderData['folderName'] . '/') : ''));
$subArr = $subArr + $rs;
}
}
$fileData[$folderData['folderName']]['folders'] = $subArr;
return $fileData;
}
static function getTotalFileCount($loopBaseData) {
$total = 0;
if (is_array($loopBaseData['files']) && count($loopBaseData['files']) > 0) {
$total = $total + count($loopBaseData['files']);
}
if (is_array($loopBaseData['folders']) && count($loopBaseData['folders'])) {
foreach ($loopBaseData['folders'] AS $folder) {
$total = $total + self::getTotalFileCount($folder);
}
}
return $total;
}
static function getTotalFileSize($loopBaseData) {
$total = 0;
if (is_array($loopBaseData['files']) && count($loopBaseData['files']) > 0) {
foreach ($loopBaseData['files'] AS $file) {
$total = $total + $file->getPrimaryFileSize();
}
if (is_array($loopBaseData['folders']) && count($loopBaseData['folders'])) {
foreach ($loopBaseData['folders'] AS $folder) {
$total = $total + self::getTotalFileSize($folder);
}
}
}
return $total;
}
// local helper functions
static function outputInitialBuffer() {
// 1KB of initial data, required by Webkit browsers
echo "<span><!--" . str_repeat("0", 1000) . "--></span>";
ob_flush();
flush();
}
static function outputBufferToScreen($str, $colour = null, $lineBreak = '<br/>') {
if ($colour !== null) {
echo '<span style="color: ' . $colour . '">';
}
echo ValidationHelper::safeOutputToScreen($str);
if ($colour !== null) {
echo '</span>';
}
self::scrollIframe();
echo $lineBreak;
ob_flush();
flush();
}
static function scrollIframe() {
echo '<script>window.scrollBy(0,50);</script>';
}
static function purgeOldZipFiles() {
// loop cache zip folder and clear any older than 3 days old
$zipStoragePath = CACHE_DIRECTORY_ROOT . '/zip/';
foreach (glob($zipStoragePath . "*.zip") as $file) {
// protect the filename
if (filemtime($file) < time() - 60 * 60 * 24 * 3) {
// double check we're in the zip cache store
if (substr($file, 0, strlen(CACHE_DIRECTORY_ROOT . '/zip/')) == CACHE_DIRECTORY_ROOT . '/zip/') {
@unlink($file);
}
}
}
}
}