const urlVariableRegex = /\{[^{}}]+\}/g;
function removeNonChars(variableName) {
  return variableName.replace(/(?:^\W+)|(?:(?<!\W)\W+$)/g, "").split(/,/);
}
function extractUrlVariableNames(url) {
  const matches = url.match(urlVariableRegex);
  if (!matches) {
    return [];
  }
  return matches.map(removeNonChars).reduce((a, b) => a.concat(b), []);
}
export {
  extractUrlVariableNames
};