migrate blogs from cnblogs to markdown

cnblogs.js

var feedparser = require('feedparser'),
    async = require('async'),
    moment = require('moment'),
    tomd = require('to-markdown').toMarkdown,
    fsextra = require('fs-extra');

var source = 'CNBlogs_BlogBackup.xml',
    target = 'post';

function tidyHtml(html) {
  return html.replace(/<br \/><\/a>/g, '</a><br />');
}

function joinYaml(head, mark) {
  var mark = mark.replace(/ *\n\[YAML\] ([\w\W]+?)(\n|$)/, function(m, c1){
    var ar = c1.replace(/&nbsp;/g, ' ').split(', '), key, value;
    ar.forEach(function(item){
      key = item.split(': ')[0];
      value = item.slice(key.length + 2);
      head[key.toLowerCase()] = value;
    });
    return '';
  });
  var yaml = '';
  for (key in head) {
    yaml += key + ': ' + head[key] + '\n'
  }
  return '---\n' + yaml + '---\n\n' + mark;
}

function tidyMark(mark) {
  var re = /<div class="cnblogs_Highlighter">\n<pre class="brush:(\w+?);gutter:false;">([\w\W]+?)\n?<\/pre>\n<\/div>/g;
  mark = mark.replace(/\r\n|\r/g, '\n')
             .replace(re, function(m, c1, c2){
                  c2 = c2.replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&amp;/g, '&');
                  return '```' + c1 + '\n' + c2 + '\n```'
              })
             .replace(/(\d)\\./g, '$1.')
             .replace(/\n\[/g, '  \n[');
  return mark;
}

async.waterfall([
  function(next){
    feedparser.parseFile(source, next);
  },
  function(meta, posts, next){
    async.forEach(posts, function(item, next){
      var link = (item.origlink ? item.origlink : item.link).split('/').reverse()[0];
      var date = moment(item.pubdate);                  
      var name = target + '/' + date.format('YYYY-MM-DD') + '-' + link.split('.')[0] + '.md';
      var mark = tomd(tidyHtml(item.description));
      var head = {
        title: item.title,
        date: date.format('YYYY-MM-DD HH:mm:ss')
      };
      mark = tidyMark(joinYaml(head, mark));
      fsextra.outputFile(name, mark, next);
    }, function(){
      next(null, posts.length);
    });
  }
], function(err, length){
  if (err) throw err;
  console.log('%d posts migrated.', length);
});

package.json

{
  "name": "migrator-cnblogs",
  "version": "0.0.1",
  "description": "migrate blogs from cnblogs to markdown",
  "dependencies": {
    "async": "*",
    "feedparser": "*",
    "moment": "*",
    "to-markdown": "*",
    "fs-extra": "*"
  }
}

nice