Laravel Aggregated Notification Implementation (https://x.com/akinkunmi/status/2058950199163207690?s=20)

NotifyOfNewLike.php

<?php

namespace App\Jobs;

use App\Models\Post;
use App\Models\Like;
use App\Models\User;
use App\Notifications\AggregatedLikeNotification;
use App\Notifications\SingleLikeNotification;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Queue\Queueable;
use Illuminate\Queue\Attributes\WithoutRelations;
use Illuminate\Queue\Attributes\DebounceFor;

#[WithoutRelations]
#[DebounceFor(60, maxWait: 120)]
class NotifyOfNewLike implements ShouldQueue
{
    use Queueable;

    public function __construct(
        public Post $post,
    ) {}

    public function debounceId(): string
    {
        return "post:{$this->post->id}:notify-of-new-like";
    }

    public function handle(): void
    {
        $this->post->load([
            'user',
            'likes' => fn ($q) => $q
                ->with('user:id,name')
                ->whereNull('notification_sent_at')
                ->latest(),
        ]);

        $likes = $this->post->likes;

        if ($likes->isEmpty()) {
            return;
        }

        $recipient = $this->post->user;

        if ($likes->count() <= 10) {
            foreach ($likes as $like) {
                $recipient->notify(
                    new SingleLikeNotification(
                        post: $this->post,
                        user: $like->user,
                    ),
                );
            }
        } else {
            $firstLike = $likes->first();

            $recipient->notify(
                new AggregatedLikeNotification(
                    post: $this->post,
                    user: $firstLike->user,
                    othersCount: $likes->count() - 1,
                ),
            );
        }

        $this->post->likes()
            ->whereKey($likes)
            ->update([
                'notification_sent_at' => now(),
            ]);
    }
}