laravel-learn-bbs/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use App\Models\Link;
use App\Models\Reply;
use App\Models\Topic;
use App\Observers\LinkObserver;
use App\Observers\ReplyObserver;
use App\Observers\TopicObserver;
use Carbon\Carbon;
use Dingo\Api\Facade\API;
use Illuminate\Auth\Access\AuthorizationException;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        Carbon::setLocale('zh');
        Topic::observe(new TopicObserver());
        Reply::observe(new ReplyObserver());
        Link::observe(new LinkObserver());
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        if ($this->app->environment() !== 'production') {
            $this->app->register(\Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider::class);
        }
        if (app()->isLocal()) {
            $this->app->register(\VIACreative\SudoSu\ServiceProvider::class);
        }

        API::error(function (ModelNotFoundException $exception) {
            abort(404);
        });
        API::error(function (AuthorizationException $exception) {
            abort(403, $exception->getMessage());
        });
    }
}