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<?php
class Chunk
{
public $UPLOAD_PATH;
private $_lastChunk = null;
private $_chunkFolder = '';
private $_lockFile = '';
private $_isLast = false;
public function __construct()
{
$this->UPLOAD_PATH = dirname(dirname(__FILE__)) . '/';
$this->_chunkFolder = $this->UPLOAD_PATH . 'default';
}
/**
* @param $info
*/
public function save($info)
{
$ret = $this->validate($info);
if ('' !== $ret)
trigger_error($ret, E_USER_ERROR);
$this->_lastChunk = $info;
$this->_chunkFolder = $this->UPLOAD_PATH . $info['id'];
$this->_lockFile = $this->_chunkFolder . '/lock';
if (!is_dir($this->_chunkFolder)) {
Helper::createDir($this->_chunkFolder);
}
$f = fopen($this->_lockFile, 'c');
if (flock($f, LOCK_EX)) {
$chunks = array_diff(scandir($this->_chunkFolder), array('.', '..', 'lock'));
if ((int) $this->_lastChunk['total'] === count($chunks) + 1) {
$this->_isLast = true;
}
$content = $info['content'];
if (!empty($this->_lastChunk['blob'])) {
if (empty($_FILES['content']['tmp_name'])) {
trigger_error('Chunk content is empty: ' . print_r($_FILES, true), E_USER_ERROR);
}
$content = Helper::readFile($_FILES['content']['tmp_name']);
Helper::deleteFile($_FILES['content']['tmp_name']);
}
Helper::writeFile($this->_chunkFolder . '/' . (int) $info['current'], $content);
flock($f, LOCK_UN);
return true;
} else {
trigger_error('Couldn\'t lock the file: ' . $this->_lockFile, E_USER_NOTICE);
}
}
/**
* @return bool
*/
public function last()
{
return $this->_isLast;
}
/**
* @return string
*/
public function complete()
{
$content = '';
for ($i = 1, $count = (int) $this->_lastChunk['total']; $i <= $count; $i++) {
if (!file_exists($this->_chunkFolder . "/$i"))
trigger_error('Missing chunk #' . $i . ' : ' . implode(' / ', scandir($this->_chunkFolder)), E_USER_NOTICE);
$data = Helper::readFile($this->_chunkFolder . "/$i");
if (!empty($this->_lastChunk['encode']) || !empty($this->_lastChunk['zip'])) {
$data = base64_decode($data);
}
$content .= $data;
}
Helper::removeDir($this->_chunkFolder);
if (!empty($this->_lastChunk['zip'])) {
$result = $this->unZip($content);
} else if (!empty($this->_lastChunk['encode'])) {
$result = array(
'status' => 'done',
'data' => rawurldecode($content)
);
} else {
$result = array(
'status' => 'done',
'data' => $content
);
}
return $result;
}
/**
* @param $content
* @return array
*/
public function unZip($content)
{
$templateName = basename(dirname($this->UPLOAD_PATH));
$tmp = JPATH_SITE . '/templates/' . $templateName . '/tmp';
Helper::createDir($tmp);
Helper::writeFile($tmp . '/content.zip', $content);
Helper::createDir($tmp . '/unzip');
$result = array('status' => 'done');
if (version_compare(JVERSION, '3.0', '<')) {
jimport('joomla.filesystem.archive');
$ret = JArchive::extract($tmp . '/content.zip', $tmp . '/unzip');
if ($ret === false) {
$result = array(
'status' => 'error',
'message' => 'Invalid type.'
);
}
} else {
jimport('joomla.filesystem.path');
try {
JArchive::extract($tmp . '/content.zip', $tmp . '/unzip');
} catch (Exception $e) {
$result = array(
'status' => 'error',
'message' => $e->getMessage()
);
}
}
if ($result['status'] === 'done' && file_exists($tmp . '/unzip/data')) {
$result['data'] = file_get_contents($tmp . '/unzip/data');
} else {
$result = array(
'status' => 'error',
'message' => 'Unzipping data error'
);
}
Helper::removeDir($tmp);
return $result;
}
/**
* @param $info
* @return string
*/
public function validate($info)
{
$errors = array();
if (!isset($info['id']) || !$info['id'])
$errors[] = 'Invalid id';
if (!isset($info['total']) || (int) $info['total'] < 1)
$errors[] = 'Invalid chunks total';
if (!isset($info['current']) || (int) $info['current'] < 1)
$errors[] = 'Invalid current chunk number';
if (empty($_FILES['content']) && empty($info['content']))
$errors[] = 'Invalid chunk content';
if (count($errors) < 1)
return '';
else
return implode(', ', $errors);
}
}