function buildQueryEscape(param) {
  return encodeURIComponent(param).replace(/[!'()*]/g, x => `%${x.charCodeAt(0).toString(16).toUpperCase()}`);
}

function buildQuery(queryData, numericPrefix = null, argSeparator = '&', tempKey = null) {
  if (queryData === null) {
	return '';
  }
  
  let query = Object.keys(queryData).map(k => {
	let res;
	let key = k;
	if (tempKey) {
	  key = tempKey + '[' + key + ']';
	}
	if (typeof queryData[k] === 'object') {
	  res = buildQuery(queryData[k], null, argSeparator, key);
	} else {
	  if (numericPrefix) {
	    let isNum = !isNaN(parseFloat(key)) && isFinite(key);
		key = isNum ? numericPrefix + Number(key) : key;
	  }
	  if (queryData[k] !== '' && queryData[k]!== undefined && queryData[k]!== null) {
		let val = queryData[k];
                // convert boolean value to int
		if (val === true) {
		  val = '1';
		} else if (val === false) {
		  val = '0';
		}
		res = buildQueryEscape(key) + '=' + buildQueryEscape(val);
	  }
	}
	return res;
  });
  
  query = query.filter((w) => {
	return w !== undefined /* w !== null */;
  });
  return query.join(argSeparator).replace(/[!'()*]/g, '');
}