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php - Laravel - 来自控制器全局的未读消息计数

问题描述

我有一个仪表板，您可以在其中查看有多少未读消息，但我希望在所有页面上使用此变量以在我的导航栏中创建一个徽章。如何将此变量返回给所有视图？

这是我的DashboardController：

class DashboardController extends Controller
{

public function index()
{
    $spentAmount = 0;
    $ordersPending = 0;
    $ordersCancelled = 0;
    $ordersCompleted = 0;
    $ordersPartial = 0;
    $ordersInProgress = 0;
    $orders = Auth::user()->orders;
    $ticketIds = Ticket::where(['user_id' => Auth::user()->id])->get()->pluck('id')->toArray();
    $unreadMessages = TicketMessage::where(['is_read' => 0])->whereIn('ticket_id', $ticketIds)->whereNotIn('user_id', [Auth::user()->id])->count();
    $supportTicketOpen = Ticket::where(['status' => 'OPEN', 'user_id' => Auth::user()->id])->count();

    foreach ($orders as $order) {
        if (strtolower($order->status) == 'pending') {
            $spentAmount += $order->price;
            $ordersPending++;
        } elseif (strtolower($order->status) == 'cancelled') {
            $ordersCancelled++;
        } elseif (strtolower($order->status) == 'completed') {
            $spentAmount += $order->price;
            $ordersCompleted++;
        } elseif (strtolower($order->status) == 'partial') {
            $spentAmount += $order->price;
            $ordersCompleted++;
        } elseif (strtolower($order->status) == 'inprogress') {
            $ordersInProgress++;
        }
    }
    return view('dashboard', compact(
        'spentAmount',
        'ordersPending',
        'ordersCancelled',
        'ordersCompleted',
        'unreadMessages',
        'ordersPartial',
        'supportTicketOpen',
        'ordersInProgress'
    ));


}

}

标签： phplaravel

解决方案

有三种不同的方法来解决您的挑战

* 中间件
* BaseClass
* JavaScript

中间件和基本控制器是类似的方法

中间件 

public function handle($request, Closure $next)
{
    $notificationCount = 1;// query the database here and get notification for your

    // add $notificationCount to your request instance
    $request->request->add(['notificationCount' => $notificationCount]);

    // call the middleware next method and you are done.
    return $next($request);
}

现在你可以在你的路由或路由组中附加这个中间件

基本控制器

class MyController extends Controller
{
    function __construct()
    {
        $this->middleware(function ($request, $next) {

            $notificationCount = 1;// query the database here and get notification for your

            // add $notificationCount to your request instance
            $request->request->add(['notificationCount' => $notificationCount]);

            // call the middleware next method and you are done.
            return $next($request);
        });
    }
}

现在您可以使用而不是扩展您的控制器，MyController而Controller不是您可以使用类似的东西

{{ request('notificationCount') }}

Javascript

创建一个函数/控制器并将通知的数量返回为返回

class NotificationCounterController extends Controller
{
    function getNotificatioCount()
    {
        $notificationCount = 1;
        return ['count' => $notificationCount];
    }
}

而不是您可以在文档加载事件中进行 ajax 调用。

如果想每隔几次更新一次通知，这很好。就像您可以每 5 秒进行一次 ajax 调用一样。

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