staffmanager/app/Listeners/OnUserRegistration.php

<?php

/*
 * Copyright © 2020 Miguel Nogueira
 *
 *   This file is part of Raspberry Staff Manager.
 *
 *     Raspberry Staff Manager is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     Raspberry Staff Manager is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with Raspberry Staff Manager.  If not, see <https://www.gnu.org/licenses/>.
 */

namespace App\Listeners;

use App\Notifications\NewUser;
use App\User;
use Illuminate\Auth\Events\Registered;
use Illuminate\Support\Facades\Log;

class OnUserRegistration
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Handle the event.
     *
     * @param  Registered  $event
     * @return void
     */
    public function handle(Registered $event)
    {
        // TODO: Send push notification to online admins via browser (w/ pusher)
        Log::info('User '.$event->user->name.' has just registered for an account.');

        foreach (User::all() as $user) {
            if ($user->hasRole('admin')) {
                $user->notify(new NewUser($event->user));
            }
        }
    }
}