ParseNotificationHandler.php

<?php 

use GuzzleHttp\Client;
use Illuminate\Config\Repository;
use Illuminate\Events\Dispatcher;

class ParseNotificationHandler
{
    /**
     * Config repository.
     *
     * @var \Illuminate\Config\Repository
     */
    protected $config;

    /**
     * Guzzle client instance.
     *
     * @var \GuzzleHttp\Client
     */
    protected $client;

    /**
     * Construct a new event subscription.
     *
     * @param \GuzzleHttp\Client $client
     */
    public function __construct(Repository $config, Client $client)
    {
        $this->config = $config;
        $this->client = $client;
    }

    /**
     * Send push notification.
     *
     * @param  string   $channel
     * @param  string   $message
     * @return \GuzzleHttp\Message\ResponseInterface
     */
    public function send($channel, $message)
    {
        $payload = json_encode([
            'where' => ['channels' => $channel],
            'data'  => ['alert'    => $message],
        ]);

        $request = $this->client->createRequest('POST', 'https://api.parse.com/1/push', [
            'body' => $payload,
        ]);

        $request->setHeaders([
            'X-Parse-Application-Id' => $this->config->get('services.parse.app'),
            'X-Parse-REST-API-Key'   => $this->config->get('services.parse.key'),
            'Content-Type'           => 'application/json',
        ]);

        return $this->client->send($request);
    }

    /**
     * Subscribe to event listener.
     *
     * @param  \Illuminate\Events\Dispatcher    $events
     * @return void
     */
    public function subscribe(Dispatcher $events)
    {
        $events->listen('push.notifier: send', 'ParseNotificationHandler@send');
    }
}