// Requires babel
// use `url.parse` to extract query string

function sureArray(a) {
  return typeof a === 'object' && a instanceof Array ? a : [a];
}

export default function parseQuery(qstr) {
    var query = {};
    var a = (qstr[0] === '?' ? qstr.substr(1) : qstr).split('&');
    for (var i = 0; i < a.length; i++) {
        var b = a[i].split('=');
        const key = decodeURIComponent(b[0]);
        const value = decodeURIComponent(b[1]);
        query[key] = query[key] ? sureArray(query[key]).concat([value]) : (value || '');
    }
    return query;
}