private function createUploadPromise()
{
// Creates an iterator that yields promises for either upload or
// multipart upload operations for each file in the source directory.
$files = Aws\recursive_dir_iterator($this->source['path']);
// Filter out directories.
$files = \Aws\filter($files, function ($file) {
return !is_dir($file);
});
// Map each file into a promise that performs the actual transfer.
$files = \Aws\map($files, function ($file) {
return filesize($file) >= $this->mupThreshold ? $this->uploadMultipart($file) : $this->upload($file);
});
// Create an EachPromise, that will concurrently handle the upload
// operations' yielded promises from the iterator.
return Promise\each_limit_all($files, $this->concurrency);
}
/** @return Iterator */
private function getDownloadsIterator()
{
if (is_string($this->source)) {
$listArgs = $this->getS3Args($this->sourceMetadata['path']);
if (isset($listArgs['Key'])) {
$listArgs['Prefix'] = $listArgs['Key'] . '/';
unset($listArgs['Key']);
}
$files = $this->client->getPaginator('ListObjects', $listArgs)->search('Contents[].Key');
$files = Aws\map($files, function ($key) use($listArgs) {
return "s3://{$listArgs['Bucket']}/{$key}";
});
return Aws\filter($files, function ($key) {
return substr($key, -1, 1) !== '/';
});
}
return $this->source;
}