<?php

namespace App\Module\File\Providers;

use App\Module\File\Events\FileDeletedEvent;
use App\Module\File\Events\FileUploadedEvent;
use App\Module\File\Events\ImageDeletedEvent;
use App\Module\File\Events\ImageUploadedEvent;
use App\Module\File\Listeners\FileEventListener;
use Illuminate\Support\ServiceProvider;

/**
 * 文件模块服务提供者
 */
class FileServiceProvider extends ServiceProvider
{
    /**
     * 事件到监听器的映射
     *
     * @var array
     */
    protected $listen = [
        FileUploadedEvent::class => [
            FileEventListener::class . '@handleFileUploaded',
        ],
        ImageUploadedEvent::class => [
            FileEventListener::class . '@handleImageUploaded',
        ],
        FileDeletedEvent::class => [
            FileEventListener::class . '@handleFileDeleted',
        ],
        ImageDeletedEvent::class => [
            FileEventListener::class . '@handleImageDeleted',
        ],
    ];

    /**
     * 需要注册的订阅者
     *
     * @var array
     */
    protected $subscribe = [
        FileEventListener::class,
    ];

    /**
     * 注册服务
     *
     * @return void
     */
    public function register(): void
    {
        // 注册服务...
        $this->app->singleton('file.service', function ($app) {
            return new \App\Module\File\Services\FileService();
        });
        
        $this->app->singleton('img.service', function ($app) {
            return new \App\Module\File\Services\ImgService();
        });
        
        $this->app->singleton('temporary.service', function ($app) {
            return new \App\Module\File\Services\TemporaryService();
        });
    }

    /**
     * 启动服务
     *
     * @return void
     */
    public function boot(): void
    {
        // 注册事件监听器
        $this->registerEvents();
    }

    /**
     * 注册事件和监听器
     *
     * @return void
     */
    protected function registerEvents(): void
    {
        $events = $this->app['events'];

        foreach ($this->listen as $event => $listeners) {
            foreach ($listeners as $listener) {
                $events->listen($event, $listener);
            }
        }

        foreach ($this->subscribe as $subscriber) {
            $events->subscribe($subscriber);
        }
    }
}