export function parseQueryParams(queryString) {
  if (queryString === '') return {};
  const parts = queryString
    .split('?')
    .pop()
    .split('&')
    .map(function(p) { return p.split('=') })

  const params = {};
  parts.forEach(function(arr) {
    params[arr[0]] = arr[1];
  })
  return params;
}

export function toQueryString(params) {
  if (!params) return ""

  const parts = []
  for (const key in params) {
    if (params.hasOwnProperty(key) && params[key]) {
      parts.push(encodeURIComponent(key) + "=" + encodeURIComponent(params[key]))
    }
  }
  return parts.join("&")
}