Sendbox Shipping woocommerce plugin - Webhook dev

class-wooss-webhook.php

<?php
/**
 * Webhook class to handle everything webhook
 *
 * Helps create the webhook url and also handling whatever is sent to the url :)
 *
 * @author Precious Omonze (Code Explorer) <https://github.com/Preciousomonze>
 * License: GPLv2 or later
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'Woos_Webhook' ) ) {
    
    class Woos_Webhook {

    	private static $_instance = null;
        
        // Some custom parameters specific to gateway
        // These paramaters are for custom webhook
        private static $webhook = 'sendbox-api';
        private static $webhook_tag = 'pekky_sendbox_webhook';//:)
        private static $webhook_action = 'pekky_wh_action';//action to be triggered when the url is loaded

        public function __construct() {
        	add_action( 'init', array( $this, 'setup' ) );
            add_action( 'parse_request', array( $this, 'parse_request' ) );            
            add_action( self::$webhook_action, array( $this, 'webhook_handler' ) );
        }

        public function setup() {
            $this->add_rewrite_rules_tags();
            $this->add_rewrite_rules();
        }

      /**
         * Handles the HTTP Request sent from SendBox to site's webhook
         *
         *
         * @since 1.0.0
         *
         * @return bool
         */
        public function webhook_handler() {
			echo "in, your face, my 7k";

            $input = $_POST;
			//start your payload processing here

        }

   // network_site_url( self::$webhook . DIRECTORY_SEPARATOR . self::$webhook_tag ) //this helps return the full url
        public function parse_request( &$wp ) {

            if( array_key_exists( self::$webhook_tag, $wp->query_vars ) ) {                
                do_action( self::$webhook_action );
                die(0);
            }

        }

        protected function add_rewrite_rules_tags() {
        	add_rewrite_tag( '%' . self::$webhook_tag . '%', '([^&]+)' );
        }

        protected function add_rewrite_rules() {
            //To use like http://site.com/sendbox-api/pekky_sendbox_webhook/
            add_rewrite_rule( '^' . self::$webhook . '/([^/]*)/?', 'index.php?' .  self::$webhook_tag . '=$matches[1]', 'top' );
        }

    }
}
new Woos_Webhook();