CakePHP 4: Firebase Cloud Messaging Component in CakePHP for Push Notification

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<?php

namespace App\Controller\Component;

use Cake\Controller\Component;

use Cake\Http\Client;

class FirebaseComponent extends Component

{

  

    public function headers() {

        $header =   ['headers' =>   [

                                        'Accept' => 'application/json',

                                        'Content-Type' => 'application/json',

                                        'Authorization' => 'key=AAAAeh0kVhs4ums9A0SYyO2xbCgXvT_jfUUi-0jXs0GfMpZ5DZPqKylqht-TPXGPiqFVj81hBPLL_st9NkjspAarhbfufFHBQN_7'

                                    ]

                    ];

        return $header;

    }

    public function sendSingleNotification() //FCM

    {

        $fcToken = 'e_tHOI1XT3udZvMYS0crNcqD4w6N5g31j6jqid12dGmm4X8Ucm28DjBXDaMJmWMCAxJ3CukpHMjESSsqnJGu08T3sEhspRr';

        $data = [ 'param_1' => 'your_param_1', 'param_2' => 'your_param_2', 'link' => 'https://inigotech.com' ];

        $notification = ['title' => 'Payment Update', 'text' => 'Your payment has been VERIFIED'];

        $data = [   

                            'to'  => $fcToken,

                            'data'      => $data,

                            'notification'       => $notification

                        ];

        $http = new Client(); 

        $response = $http->post(

                                'https://fcm.googleapis.com/fcm/send',

                                json_encode($data),

                                $this->headers()                               

                                );

        

        $jsonResult = json_decode($response->getStringBody(), true);

        if(isset($jsonResult['success'])){

            $success = $jsonResult['failure'];

            //$io->out($success);

        }

    }

}