/**
* Read a specific lump. Currently only supports entities.
*
* @param $index
* @throws \Exception
*/
private function readLump($index)
{
$info = $this->lumpHeader[$index];
$this->buffer->seek($info['fileofs']);
if ($index === 0) {
$hdr = $this->buffer->peek(4);
if ($hdr == 'LZMA') {
// Team Fortress 2
// Decompress
$buffer = $this->decompressLZMALump($this->buffer);
} else {
$buffer = $this->buffer->slice($info['filelen']);
}
$parts = explode("}", $buffer->getData());
$lump = [];
foreach ($parts as $data) {
$data = trim($data);
if (strlen($data) < 1 || $data[0] != '{') {
continue;
}
$lump[] = KeyValues::decode("\"Entity\"\n" . trim($data) . "\n}")['Entity'];
}
} else {
if ($index === 40) {
$file = tempnam(sys_get_temp_dir(), 'zip');
$tmp = fopen($file, 'w');
$remaining = $info['filelen'];
while ($remaining > 0) {
$chunk = $this->buffer->read($remaining > CHUNK_SIZE ? CHUNK_SIZE : $remaining);
fwrite($tmp, $chunk);
$remaining -= strlen($chunk);
}
$lump = new PakFile($file);
}
}
return $lump;
}
/**
* Load the archive.
*
* @throws VPKException
* @throws \Exception
* @throws \VLib\Buffer\BufferUnderflowException
*/
private function load()
{
$this->multiChunk = strpos($this->path, '_dir') !== false;
// Load it from our filesystem. This uses Flysystem to support remote files.
$fh = $this->filesystem->readStream($this->path);
if (!$fh) {
throw new VPKException('Unable to open path ' . $this->path);
}
/**
* Use a temporary buffer for the header data.
*/
$buffer = new ResourceBuffer($fh);
$sig = $buffer->getInteger();
if ($sig !== 1437209140) {
throw new VPKException('Invalid file signature.');
}
$this->version = $buffer->getInteger();
switch ($this->version) {
case 1:
$headerSize = 12;
break;
case 2:
$headerSize = 28;
$buffer->skip(16);
break;
default:
throw new VPKException('Invalid file version.');
}
$this->dictSize = $buffer->getInteger();
$this->pathEntries = [];
while ($type = $buffer->getString()) {
while ($dir = $buffer->getString()) {
while ($name = $buffer->getString()) {
$crc32 = $buffer->getInteger();
$preloadSize = $buffer->getShort();
$chunkIndex = $buffer->getShort();
$offset = $buffer->getInteger();
$size = $buffer->getInteger();
$term = $buffer->getShort();
if ($term !== 0xffff) {
throw new VPKException('Unexpected termination character.');
}
$preload = '';
if ($preloadSize > 0) {
$preload = $buffer->read($preloadSize);
}
if ($this->multiChunk) {
$entryName = sprintf('%s_%03d.vpk', $this->vpkName, $chunkIndex);
$entryName = $this->dir . '/' . $entryName;
} else {
$entryName = $this->file;
if ($this->version == 1) {
$offset += $headerSize + $this->dictSize;
}
}
$entry = new VPKEntry($this->filesystem, $entryName);
$entry->setType($type);
$entry->setName($name);
$entry->setDir($dir);
$entry->setCRC32($crc32);
$entry->setOffset($offset);
$entry->setSize($size);
$entry->setPreload($preload);
$this->pathEntries[$entry->getPath()] = $entry;
}
}
}
}