Streaming CSV download

[parkourben99]

I'm using this package but have large datasets that need to be downloaded. I have previously just written a easy way to stream the download by chunking the query and directly download the CSV.

I created a trait to be able to do this with. This is very basic right now.

My question is would something like this be worth making a PR to add?

trait Streamable
{
    public function stream(string $filename, int $chunkSize = 1000): StreamedResponse
    {
        return response()->streamDownload(
            function () use ($chunkSize) {
                $this->streamRows($chunkSize);
            },
            "{$filename}.csv",
            [
                'Content-Type' => 'text/csv',
            ],
        );
    }

    protected function streamRows($chunkSize)
    {
        $stream = fopen('php://output', 'w');

        fputcsv($stream, $this->headings());

        $this->query()->chunk($chunkSize, function ($chunk) use ($stream) {
            foreach ($chunk as $row) {
                fputcsv($stream, $this->map($row));
            }
        });

        fclose($stream);
    }
}