pixelfed/app/Jobs/LikePipeline/LikePipeline.php

<?php

namespace App\Jobs\LikePipeline;

use App\Like;
use App\Notification;
use Cache;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Log;
use Redis;

class LikePipeline implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    protected $like;

    /**
     * Delete the job if its models no longer exist.
     *
     * @var bool
     */
    public $deleteWhenMissingModels = true;

    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct(Like $like)
    {
        $this->like = $like;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        $like = $this->like;

        $status = $this->like->status;
        $actor = $this->like->actor;

        if (!$status || $status->url !== null) {
            // Ignore notifications to remote statuses, or deleted statuses
            return;
        }

        $exists = Notification::whereProfileId($status->profile_id)
                  ->whereActorId($actor->id)
                  ->whereAction('like')
                  ->whereItemId($status->id)
                  ->whereItemType('App\Status')
                  ->count();

        if ($actor->id === $status->profile_id || $exists !== 0) {
            return true;
        }

        try {
            $notification = new Notification();
            $notification->profile_id = $status->profile_id;
            $notification->actor_id = $actor->id;
            $notification->action = 'like';
            $notification->message = $like->toText();
            $notification->rendered = $like->toHtml();
            $notification->item_id = $status->id;
            $notification->item_type = "App\Status";
            $notification->save();

            Cache::forever('notification.'.$notification->id, $notification);

            $redis = Redis::connection();
            $key = config('cache.prefix').':user.'.$status->profile_id.'.notifications';
            $redis->lpush($key, $notification->id);
        } catch (Exception $e) {
            Log::error($e);
        }
    }
}