php - Laravel Controller 功能全局应用

Question

我的网站收件箱页面有一个 Controller ，该 Controller 中有一个函数可以计算用户未读消息的数量。

    public function updateUnreadCount() {
        if (Auth::check()) {
            $value = 0;
            $messages = Message::where(function($query) {
                return $query->where('recipient_id', Auth::user()->id)->where('reci_read', 0)
                ->orWhere('user_id', Auth::user()->id)->where('sender_read', 0);
            }); 

            foreach ($messages as &$value) {
                    ++$value;
            };

            Auth::user()->update([
                'unread_msg' => $value,
            ]);
        };  
    }   

我想知道的是，如何让这个函数对所有经过身份验证的用户全局触发，以便我可以在每个页面上显示未读消息的数量？

Answer 1

使用View Composer

View composers are callbacks or class methods that are called when a view is rendered.

假设您的未读收件箱位于navbar.blade.php。

        // From the documentation, using Closure based composers...
        View::composer('navbar', function ($view) {
            if(Auth::user()) {
              //logic here
            }
        });