Path maching

match.js

import pathToRegexp from 'path-to-regexp';

const compilePath = (pattern) => {
  const keys = [];
  const re = pathToRegexp(pattern, keys);
  const compiledPattern = { re, keys };
  return compiledPattern;
};

/**
   input:
   - path: '/path/7';
   - pattern: '/path/:id';
   output:
   - { id : 7 } 
 */
function getParams(path, pattern) {
  const { re, keys } = compilePath(pattern);
  const match = re.exec(path);
  if (!match) return {};
  const [url, ...values] = match;
  const params = keys.reduce((memo, key, index) => {
    memo[key.name] = values[index];
    return memo;
  }, {});
  return params;
}


getParams('/path/7', '/path/:id'); // { id: 7 }