textile-js/src/fixlinks.js

A full-featured JavaScript Textile parser

// recurse the tree and swap out any "href" attributes
// this uses the context as the replace dictionary so it can be fed to Array#map
module.exports = function fixLinks (ml, dict) {
  if (Array.isArray(ml)) {
    if (ml[0] === 'a') { // found a link
      const attr = ml[1];
      if (typeof attr === 'object' && 'href' in attr && attr.href in dict) {
        attr.href = dict[attr.href];
      }
    }
    for (let i = 0, l = ml.length; i < l; i++) {
      if (Array.isArray(ml[i])) {
        fixLinks(ml[i], dict);
      }
    }
  }
  return ml;
};