const guxid: string = (Math.random().toString(16) + "000000000").substr(2, 8);

/**
 * Get current unique global page user id
 */
function guid() {
    function _p8(s: boolean) {
        const p = guxid;
        return s ? "-" + p.substr(0, 4) + "-" + p.substr(4, 4) : p;
    }

    return _p8(false) + _p8(true) + _p8(true) + _p8(false);
}

if (typeof jQuery != "undefined" && !isnode()) {
    jQuery.guid = function () {
        function _p8(s: boolean) {
            const p = guxid;
            return s ? "-" + p.substr(0, 4) + "-" + p.substr(4, 4) : p;
        }

        return _p8(false) + _p8(true) + _p8(true) + _p8(false);
    };
}

/**
 * Generate UUID v4
 */
function uuidv4() {
    return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function (c) {
        const r = (Math.random() * 16) | 0,
            v = c == "x" ? r : (r & 0x3) | 0x8;
        return v.toString(16);
    });
}