laravel-websockets/src/LaravelEcho/Http/Controllers/FetchChannel.php

<?php

namespace BeyondCode\LaravelWebSockets\LaravelEcho\Http\Controllers;

use BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Channels\ChannelManager;
use BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Exceptions\InvalidSignatureException;
use Illuminate\Http\Request;
use Symfony\Component\HttpKernel\Exception\HttpException;

class FetchChannel extends EchoController
{
    /** @var \BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Channels\ChannelManager */
    protected $channelManager;

    public function __construct(ChannelManager $channelManager)
    {
        $this->channelManager = $channelManager;
    }

    public function __invoke(Request $request)
    {
        $this->verifySignature($request);

        foreach ($request->json()->get('channels', []) as $channelId) {
            $channel = $this->channelManager->find($request->appId, $channelId);

            optional($channel)->broadcast([
                'channel' => $channelId,
                'event' => $request->json()->get('name'),
                'data' => $request->json()->get('data'),
            ]);
        }

        return $request->json()->all();
    }
}