leezard/app/Events/ExportFailed.php

<?php
namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class ExportFailed implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $userId;
    public $errorMessage;
    public $message;

    /**
     * Create a new event instance.
     */
    public function __construct($userId, $errorMessage)
    {
        $this->userId = $userId;
        $this->errorMessage = $errorMessage;
        $this->message = 'Export fallito. Riprova o contatta il supporto.';
    }

    /**
     * Get the channels the event should broadcast on.
     */
    public function broadcastOn()
    {
        return new PrivateChannel('exports.' . $this->userId);
    }

    /**
     * Get the data to broadcast.
     */
    public function broadcastWith()
    {
        return [
            'type' => 'export_failed',
            'message' => $this->message,
            'error' => $this->errorMessage,
            'timestamp' => now()->toISOString()
        ];
    }

    /**
     * The event's broadcast name.
     */
    public function broadcastAs()
    {
        return 'export.failed';
    }
}