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<?php

require __DIR__."/../utils/Xapi.php";

/**
 * Common base functions.
 */
class SwagPlugin {

    private static $instance;

    /**
     * Constructor.
     */
    private function __construct() {
    }

    /**
     * Get xapi endpoint, if configured.
     */
    public function getXapi() {
        static $xapi;

        if (!$xapi) {
            if (is_plugin_active("wp-xapi-lrs/wp-xapi-lrs.php")) {
                $endpoint=site_url()."/wp-content/plugins/wp-xapi-lrs/endpoint.php";
                $username=get_option("xapilrs_username");
                $password=get_option("xapilrs_password");

                $xapi=new Xapi($endpoint,$username,$password);
            }

            else {
                $endpoint=get_option("ti_xapi_endpoint_url");
                $username=get_option("ti_xapi_username");
                $password=get_option("ti_xapi_password");

                if ($endpoint)
                    $xapi=new Xapi($endpoint,$username,$password);

                else
                    $xapi=NULL;
            }
        }

        return $xapi;
    }

    /**
     * Get sinleton instance.
     */
    public static function instance() {
        if (!SwagPlugin::$instance)
            SwagPlugin::$instance=new SwagPlugin();

        return SwagPlugin::$instance;
    }
}