laravel controller

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Response;
use Illuminate\Support\Facades\DB;
use Exception;
use Inertia\Inertia;
use App\Models\Document;
use App\Models\ExtractionResults;

class ExtractionController extends Controller
{
    public function index(Document $document)
    {
        return Inertia::render('DocumentExtract', compact('document'));
    }

    public function extract(Document $document)
    {
        ini_set('output_buffering', 'off');
        ini_set('zlib.output_compression', 'off');
        // Set headers for SSE
        $response = Response::stream(function () use ($document) {
            $counter = 0; // Initialize counter

            while ($counter < 20) { // Stop after 10 messages
                echo "data: " . json_encode([
                    'counter' => $counter,
                    'time' => now()->toDateTimeString(),
                    'document' => $document,
                ]) . "\n\n";

                ob_flush();
                flush();
                sleep(1); // Send updates every 2 seconds
                $counter++; // Increment counter
            }
        }, 200, [
            'Content-Type'      => 'text/event-stream',
            'Cache-Control'     => 'no-cache',
            'Connection'        => 'keep-alive',
            'X-Accel-Buffering' => 'no',
        ]);

        return $response;
    }
}