pixelfed/app/Jobs/FollowPipeline/FollowPipeline.php

<?php

namespace App\Jobs\FollowPipeline;

use App\Follower;
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 Illuminate\Support\Facades\Redis;
use App\Services\AccountService;
use App\Services\FollowerService;

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

    protected $follower;

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

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

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

        if(!$actor || !$target) {
            return;
        }

        if($target->domain || !$target->private_key) {
            return;
        }

        Cache::forget('profile:following:' . $actor->id);
        Cache::forget('profile:following:' . $target->id);

        FollowerService::add($actor->id, $target->id);

        $count = Follower::whereProfileId($actor->id)->count();
        $actor->following_count = $count;
        $actor->save();
        AccountService::del($actor->id);

        $count = Follower::whereFollowingId($target->id)->count();
        $target->followers_count = $count;
        $target->save();
        AccountService::del($target->id);

        if($target->user_id && $target->domain === null) {
            try {
                $notification = new Notification();
                $notification->profile_id = $target->id;
                $notification->actor_id = $actor->id;
                $notification->action = 'follow';
                $notification->item_id = $target->id;
                $notification->item_type = "App\Profile";
                $notification->save();
            } catch (Exception $e) {
                Log::error($e);
            }
        }
    }
}