<?php
    class AbprotectorWooSession{
        private static $instance;

        public static function get_instance() {
            if ( ! isset( self::$instance ) ) {
                self::$instance = new self();
            }
            return self::$instance;
        }

        function __construct(){
            /**
             * Check is woocommerce session was initlized
             */
            if ( !isset(WC()->session) || empty(WC()->session) ) {
                if (class_exists('WC_Session_Handler')) {
                    WC()->session = new \WC_Session_Handler();
                    WC()->session->init();
                }
            }
            /**
             * make sure the session was created
             */
            if (method_exists(WC()->session, 'has_session')) {
                if (!WC()->session->has_session() && !defined('DOING_CRON')) {
                    if (method_exists(WC()->session, 'set_customer_session_cookie')) {
                        WC()->session->set_customer_session_cookie(true);
                    }
                }
            }
        }

        /**
         * check the wc session has the value
         * @param $key
         * @return bool
         */
        function hasKey($key)
        {
            return true;
        }

        /**
         * Set the value for the PHP session
         * @param $key
         * @param $value
         * @return null
         */
        function setValue($key, $value)
        {
            if (empty($key)) {
                return NULL;
            }
            if (method_exists(WC()->session, 'set')) {
                WC()->session->set($key, $value);
            }
            return true;
        }

        /**
         * get the value from the session
         * @param $key
         * @return mixed|null
         */
        function getValue($key)
        {
            if (empty($key)) {
                return NULL;
            }
            if (method_exists(WC()->session, 'get')) {
                return WC()->session->get($key);
            }
            return NULL;
        }

        /**
         * remove the value from the session
         * @param $key
         * @return bool
         */
        function removeValue($key)
        {
            if (empty($key))
                return false;
            if (method_exists(WC()->session, '__unset')) {
                WC()->session->__unset($key);
            }
            return true;
        }
    }
?>