moves-notification-handler.php

<?php

class AhrMovesNotificationsHandler {

  public function __construct() {
    add_action('rest_api_init', function() {
      register_rest_route('moves/v1', '/notify', array(
        'methods' => 'POST',
        'callback' => array($this, 'on_receive_update'),
      ));
    });
  }

  public function on_receive_update(WP_REST_Request $request) {
    $json_body = $parameters = $request->get_json_params();

    $json_body = (array) $json_body;
    $json_body['created_at'] = date('r', time());
    $json_body = (object) $json_body;

    $filename = sprintf(
      "%s/cache/user-updates/%s.txt",
      dirname(__FILE__, 2),
      date('j-M-Y H.i.s', time())
    );

    file_put_contents($filename, json_encode($json_body), LOCK_EX);

    return $json_body;
  }

}