问题

在我的 Laravel 应用程序中，我已经成功地实现了 Pusher，但我想要这样做：当用户成功下订单时，默认订单的状态消息是 `pending`。具体情况是，当管理员将状态消息更改为 `processed` 时，已下订单的用户会收到通知，告知他的订单已处理。

但是当前的代码会向所有用户发送通知。

**Controller**

```php
if ($data->status_message == 'processed') {
   event(new OrderEvent('Hi, Your order is processed!'));

   // 其他操作...
}

My Event OrderEvent.php

public function broadcastOn()
{
    return new Channel('notif-channel');
}

/**
 * Broadcast order event.
 * 
 * @return void
 */
public function broadcastAs()
{
    return 'order-event';
}

在 App blade 中

var channel = pusher.subscribe('notif-channel');
channel.bind('order-event', function(data) {

    const obj = JSON.parse(JSON.stringify(data));
    const message = obj.message;
    
    // 其他处理...
}

<details>
<summary>英文:</summary>

I have successfully implemented pusher on my laravel app but I want to make, when the user succeeds in making an order the default status_message for the order is `pending`, the case is when the admin changes the status_message to `processed`, the user who has ordered gets a notification that the order he has made is processed.

this is my code but this code sends notifications to all users.

**Controller**

    if ($data-&gt;status_message == &#39;processed&#39;) {
       event(new OrderEvent(&#39;Hi, Your order is processed!&#39;));

       //...
    }

**My Event OrderEvent.php**

    public function broadcastOn()
    {
        return new Channel(&#39;notif-channel&#39;);
    }

    /**
     * Broadcast order event.
     * 
     * @return void
     */
    public function broadcastAs()
    {
        return &#39;order-event&#39;;
    }

**in App blade**

    var channel = pusher.subscribe(&#39;notif-channel&#39;);
        channel.bind(&#39;order-event&#39;, function(data) {

            const obj = JSON.parse(JSON.stringify(data));
            const message = obj.message;
            
            blah blah blah
    }

</details>


# 答案1
**得分**: 1

用户和管理员应该在同一个频道上。例如，如果用户订阅了频道'order-channel-SetUserID'。
管理员应该向该频道发送消息，然后你应该在前端查找并在DOM上进行更改。

在你的控制器中，当你提交订单状态的更改时，运行带有频道名称的事件：

```php
event(new OrderEvent($user_id, '嗨，您的订单已处理！'));

现在你的事件应该类似于这样：

class OrderEvent implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $user_id;
    public $message;

    public function __construct($user_id, $message)
    {
        $this->user_id  = $user_id;
        $this->message  = $message;
    }

    public function broadcastOn()
    {
        return new Channel('order-channel.' . $this->user_id);
    }

    public function broadcastAs()
    {
        return 'order-event';
    }
}

当然，你可以更改你的类名等等，我只是给出一个想法。

重要的是要通过与该用户相同的频道发送更改，否则你会对访问你网站的其他用户进行更改。

编辑

以下是你需要配置的其他内容。
在app/Providers/EventServiceProvider.php中

你需要将事件放在protected $listen中：

protected $listen = [
    Registered::class => [
        SendEmailVerificationNotification::class,
    ],
    OrderEvent::class => [
        OrderEventListener::class,
    ],
];

在app/Listeners中，你应该创建OrderEventListener.php并设置如下：

<?php

namespace App\Listeners;

use App\Events\OrderEvent;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Queue\InteractsWithQueue;
use Pusher;

class OrderEventListener
{
    public function __construct()
    {
        //
    }

    public function handle(OrderEvent $event)
    {
        $pusher = new Pusher(env('PUSHER_APP_KEY'), 
                  env('PUSHER_APP_SECRET'), env('PUSHER_APP_ID'), [
            'cluster' => env('PUSHER_APP_CLUSTER'),
            'useTLS' => true
        ]);

        $pusher->trigger($event->broadcastOn(),
        $event->broadcastAs(), $event->data);
    }
}

检查你的Pusher仪表板中的调试控制台？如果你能在那里看到事件触发，那么你只需要用JavaScript显示消息。如果没有事件正在运行，那么你的代码中可能有遗漏。

event(new OrderEvent($user_id, 'Hi, Your order is processed!'));

class OrderEvent implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $user_id;
    public $message;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($user_id, $message)
    {
        $this->user_id  = $user_id;
        $this->message  = $message;
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return \Illuminate\Broadcasting\Channel|array
     */
    public function broadcastOn()
    {
        return new Channel('order-channel.' . $this->user_id);
    }

    public function broadcastAs()
    {
        return 'order-event';
    }
}

  protected $listen = [
        Registered::class => [
            SendEmailVerificationNotification::class,
        ],
        OrderEvent::class => [
            OrderEventListener::class,
        ],
    ];

<?php
    
namespace App\Listeners;
use App\Events\OrderEvent;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Queue\InteractsWithQueue;
use Pusher;
    
    class OrderEventListener
        {
            /**
             * Create the event listener.
             *
             * @return void
             */
            public function __construct()
            {
                //
            }
        
            /**
             * Handle the event.
             *
             * @param  \App\Events\OrderEvent  $event
             * @return void
             */
            public function handle(OrderEvent $event)
            {
                $pusher = new Pusher(env('PUSHER_APP_KEY'), 
                          env('PUSHER_APP_SECRET'), env('PUSHER_APP_ID'), [
                    'cluster' => env('PUSHER_APP_CLUSTER'),
                    'useTLS' => true
                ]);
        
                $pusher->trigger($event->broadcastOn(),
                $event->broadcastAs(), $event->data);
            }