Add another CDN for FV Player Pro with custom URL token generator

fv-player-custom-cdn.php

<?php 

/*
Plugin Name: FV Player Pro - Custom CDN
Description: Add Settings -> FV Player Pro -> Hosting -> BunnyCDN Extended which signs the URLs for use in SK and US countries only.
Author: Foliovision
Version: 0.1
*/

add_action( 'plugins_loaded', 'fv_player_custom_cdn_load', 0 );

function fv_player_custom_cdn_load() {
  if( class_exists('FV_Player_Pro_Ajax_Loader') ) {
    
    class FV_Player_Pro_BunnyCDN_Extended extends FV_Player_Pro_Ajax_Loader {
      
      function __construct() {
        parent::__construct( array( 'key' => 'bunnycdn_extended', 'title' => 'BunnyCDN Extended') );
      }
      
      function args($args) {
        $args[] = 'token';
        return $args;
      }
      
      function secure_link( $url, $securityKey, $ttl = false ) {
        $parsed = parse_url( $url );
        $expires = time() + ( $ttl ? $ttl : apply_filters('fv_player_secure_link_timeout', 900) );
        $hashableBase = $securityKey.urldecode($parsed['path']).$expires.'token_countries=SK,US';
        
        $token = hash('sha256', $hashableBase, true);
        $token = base64_encode($token);
        $token = strtr($token, '+/', '-_');
        $token = str_replace('=', '', $token);  
        
        $url = add_query_arg( 'token', $token, $url);
        $url = add_query_arg( 'expires', $expires, $url);
        $url = add_query_arg( 'token_countries', 'SK,US', $url);

        return $url;
      }
    
    }
    
    new FV_Player_Pro_BunnyCDN_Extended;
    
  }
}