Laravel中的事件广播：实现实时通知和状态更新

<?php

namespace AppEvents;

use IlluminateContractsBroadcastingShouldBroadcast;
use IlluminateFoundationEventsDispatchable;
use IlluminateQueueSerializesModels;

class NewComment implements ShouldBroadcast
{
    use Dispatchable, SerializesModels;

    public $comment;

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

    /**
     * Get the channels the event should broadcast on.
     *
     * @return IlluminateBroadcastingChannel|array
     */
    public function broadcastOn()
    {
        return new Channel('comments');
    }
}

<?php

namespace AppListeners;

use AppEventsNewComment;
use IlluminateContractsQueueShouldQueue;
use IlluminateQueueInteractsWithQueue;

class SendCommentNotification implements ShouldQueue
{
    use InteractsWithQueue;

    /**
     * Handle the event.
     *
     * @param  NewComment  $event
     * @return void
     */
    public function handle(NewComment $event)
    {
        // 处理发送通知的逻辑
        // 例如，发送邮件通知用户
    }
}

protected $listen = [
    'AppEventsNewComment' => [
        'AppListenersSendCommentNotification',
    ],
];

BROADCAST_DRIVER=redis

<?php

namespace AppHttpControllers;

use AppEventsNewComment;
use AppModelsComment;
use IlluminateHttpRequest;

class CommentController extends Controller
{
    public function create(Request $request)
    {
        $comment = Comment::create([
            'content' => $request->input('content'),
            'user_id' => auth()->user()->id,
            // 其他属性
        ]);

        event(new NewComment($comment));

        // 你的其他代码逻辑

        return response()->json(['message' => 'Comment created successfully']);
    }
}

<script src="{{asset('js/app.js')}}"></script>

Echo.channel('comments')
    .listen('NewComment', (event) => {
        // 处理接收到的事件
        // 例如，显示新评论的内容
    });