public function __construct(CollectionWrapper $collectionWrapper, $filename, array $options = [])
{
$options += ['_id' => new ObjectId(), 'chunkSizeBytes' => self::$defaultChunkSizeBytes];
if (isset($options['aliases']) && !Functions::isStringArray($options['aliases'])) {
throw InvalidArgumentException::invalidType('"aliases" option', $options['aliases'], 'array of strings');
}
if (isset($options['chunkSizeBytes']) && !is_integer($options['chunkSizeBytes'])) {
throw InvalidArgumentException::invalidType('"chunkSizeBytes" option', $options['chunkSizeBytes'], 'integer');
}
if (isset($options['contentType']) && !is_string($options['contentType'])) {
throw InvalidArgumentException::invalidType('"contentType" option', $options['contentType'], 'string');
}
if (isset($options['metadata']) && !is_array($options['metadata']) && !is_object($options['metadata'])) {
throw InvalidArgumentException::invalidType('"metadata" option', $options['metadata'], 'array or object');
}
$this->chunkSize = $options['chunkSizeBytes'];
$this->collectionWrapper = $collectionWrapper;
$this->buffer = fopen('php://temp', 'w+');
$this->ctx = hash_init('md5');
$this->file = ['_id' => $options['_id'], 'chunkSize' => $this->chunkSize, 'filename' => (string) $filename, 'uploadDate' => new UTCDateTime(floor(microtime(true) * 1000))] + array_intersect_key($options, ['aliases' => 1, 'contentType' => 1, 'metadata' => 1]);
}