/**
 * @param {String} token might match the following pattern: {user}@{tpl_id}@{token}:{cache_buster}
 */
function parse(token) {
    var signer, cacheBuster;

    var tokenSplit = token.split(':');

    token = tokenSplit[0];
    if (tokenSplit.length > 1) {
        cacheBuster = tokenSplit[1];
    }

    tokenSplit = token.split('@');
    if ( tokenSplit.length > 1 ) {
        signer = tokenSplit.shift();
        if ( tokenSplit.length > 1 ) {
            /*var template_hash = */tokenSplit.shift(); // unused
        }
        token = tokenSplit.shift();
    }

    return {
        token: token,
        signer: signer,
        cacheBuster: cacheBuster
    };
}
module.exports.parse = parse;