trypost/app/Events/PostCommentCreated.php

<?php

declare(strict_types=1);

namespace App\Events;

use App\Models\PostComment;
use App\Models\User;
use App\Support\MentionParser;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Foundation\Events\Dispatchable;

class PostCommentCreated implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets;

    public function __construct(public PostComment $comment) {}

    public function broadcastAs(): string
    {
        return 'post.comment.created';
    }

    public function broadcastOn(): array
    {
        return [
            new PrivateChannel("post.{$this->comment->post_id}"),
        ];
    }

    /**
     * @return array<string, mixed>
     */
    public function broadcastWith(): array
    {
        $mentionedIds = MentionParser::extractUserIds($this->comment->body ?? '');
        $mentionedUsers = empty($mentionedIds)
            ? []
            : User::query()
                ->whereIn('id', $mentionedIds)
                ->get(['id', 'name'])
                ->mapWithKeys(fn ($u) => [$u->id => $u->name])
                ->all();

        return [
            'comment' => [
                'id' => $this->comment->id,
                'user_id' => $this->comment->user_id,
                'parent_id' => $this->comment->parent_id,
                'body' => $this->comment->body,
                'reactions' => $this->comment->reactions ?? [],
                'created_at' => $this->comment->created_at->toISOString(),
                'updated_at' => $this->comment->updated_at->toISOString(),
                'user' => [
                    'id' => $this->comment->user->id,
                    'name' => $this->comment->user->name,
                    'photo_url' => $this->comment->user->photo_url,
                ],
            ],
            'mentioned_users' => $mentionedUsers,
        ];
    }

    public function broadcastQueue(): string
    {
        return 'broadcasts';
    }
}