Pony.fm/app/Providers/AuthServiceProvider.php

<?php

/**
 * Pony.fm - A community for pony fan music.
 * Copyright (C) 2015 Peter Deltchev
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace Poniverse\Ponyfm\Providers;

use Illuminate\Contracts\Auth\Access\Gate as GateContract;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Poniverse\Ponyfm\Models\Genre;
use Poniverse\Ponyfm\Policies\GenrePolicy;
use Poniverse\Ponyfm\Policies\TrackPolicy;
use Poniverse\Ponyfm\Models\Track;
use Poniverse\Ponyfm\Models\User;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * The policy mappings for the application.
     *
     * @var array
     */
    protected $policies = [
        Genre::class => GenrePolicy::class,
        Track::class => TrackPolicy::class,
    ];

    /**
     * Register any application authentication / authorization services.
     *
     * @param  \Illuminate\Contracts\Auth\Access\Gate  $gate
     * @return void
     */
    public function boot(GateContract $gate)
    {
        $gate->define('access-search', function(User $user) {
            return $user->hasRole('admin') || $user->hasRole('moderator');
        });

        $gate->define('access-admin-area', function(User $user) {
            return $user->hasRole('admin');
        });

        $gate->define('create-genre', function(User $user) {
            return $user->hasRole('admin');
        });

        $this->registerPolicies($gate);
    }
}