Calendar parser for codemotion

gistfile1.js

var fs = require('fs');

var obj = JSON.parse(fs.readFileSync('data.json', 'utf8'));

var result = "";

var writer = {
  log : function(params){
    result += params + "\r\n";

    console.log(params);
  },
  end: function(){
    fs.writeFile('codemotion.ics',result);
  }
}

function pad(num) {
  var zero = 2 - num.toString().length + 1;
  return Array(+(zero > 0 && zero)).join("0") + num;
}

//var writer = console;

writer.log("BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:-//hacksw/handcal//NONSGML v1.0//EN")

obj.days.forEach(function(day) {
  day.tracks.forEach(function(track) {
    track.slots.forEach(function(slot) {

      if(!slot.contents){
        return;
      }
      if(!slot.contents.title){
        return;
      }
      writer.log("BEGIN:VEVENT");

      if(slot.contents.type == "BREAK"){
        writer.log("SUMMARY:" + slot.contents.title);
      } else {
        writer.log("SUMMARY:" + "[" + track.name + "] " + slot.contents.title);
      }

      var dayName = day.name.substring(0,2);

      writer.log("DTSTART:201511" + dayName + "T" + pad(parseInt(slot.start.substring(0,2)) - 1) + slot.start.substring(3,5) + "00Z");
      writer.log("DTEND:201511" + dayName + "T" + pad(parseInt(slot.end.substring(0,2)) - 1) + slot.end.substring(3,5) + "00Z");

      var description = "";
      if(slot.contents.description){
        description += "DESCRIPTION:" + slot.contents.description.replace(/(\r\n|\n|\r)/gm,"\\n");
      }

      if(slot.contents.authors){
        for(var i = 0; i < slot.contents.authors.length; i++){
          var author = slot.contents.authors[i];
          description += "\\n\\nAutor: " + author.name + " (" + author.uuid + ") \\n:" + author.description.replace(/(\r\n|\n|\r)/gm,"");
        }
      }
      if(slot.contents.description){
        writer.log(description);
      }

      writer.log("END:VEVENT");
    }, this);

  }, this);

}, this);


writer.log("END:VCALENDAR");
if(writer.end){
  writer.end();
}