Fix unix dates to suitable in frontmatter

fix-dates.js

/**
 * Convert unix timestamps to ISO times in frontmatter
 */


'use strict';

const fs = require('fs'),
  path = require('path'),
  yfm = require('yaml-front-matter');


// 1277284080 --> 2014-03-22T17:44:00+0200

// 1. Find Markdown files
// 2. read their frontmatter
// 3. fix date
// 4. string replace in original contents

var directory = 'stories/published/';

var list = fs.readdirSync(directory);

list.forEach(function eachFile(filename) {
  var filepath = path.join(directory, filename);

  console.log('Reading ' + filepath);

  var raw = fs.readFileSync(filepath, 'utf8');
  var data = yfm.loadFront(raw);

  if (data.hasOwnProperty('image') && data.image.hasOwnProperty('modified')) {
    var orig = String(data.image.modified);
    if (orig.substr(0, 2) !== '20') {
      var date = new Date(data['image']['modified'] * 1000);
      var suitable = toSuitableString(date);
      raw = raw.replace(orig, suitable);
    }

    fs.writeFileSync(filepath, raw, 'utf8');
  }
  /*
  publishtime: 1277284080
  modified: 1277285361
  */

});

function pad(number) {
  if (number < 10) {
    return '0' + number;
  }
  return number;
}

function toSuitableString(date) {
  return '\'' + date.getFullYear() +
    '-' + pad(date.getMonth() + 1) +
    '-' + pad(date.getDate()) +
    'T' + pad(date.getHours()) +
    ':' + pad(date.getMinutes()) +
    ':' + pad(date.getSeconds()) +
    '+' + pad(Math.abs(date.getTimezoneOffset() / 60 * 100)) + '\'';
}