structure of the code follows structure of the data

structure of the code follows structure of the data

// loadtweets.js: exports init function, which loads tweets from ./tweets folder into tweet_collection global variable.

var fs = require('fs');
var _und = require('./underscore-min')._;

tweet_collection = [];

function Tweet(diskTweet, donor) {
    
    // if encapsulated RT, act on retweeted_status value instead of entire tweet
    if (tweet_json.retweeted_status) {
        tweet_json = tweet_json.retweeted_status
    };
    
    _und.extend(this, tweet_json);
    this.created_at = new Date(this.created_at);
    this.donors = [];
    this.donors.push(donor);
    // console.log(this.id_str + " donated by " + this.donors);
}

function parseDiskTweet(disktweet, donor)
{
  return new Tweet(tweet, donor);
}
function parseDiskTweets(diskTweets, donor)
{
  _.map(function (t) { return diskTweets(t, donor) }, parseDiskTweet);
}

function parseDiskTweetsFileContent(content, donor)
{
  var diskTweets = JSON.parse(content.substring(fileContents.indexOf("[")));
  parseDiskTweets(diskTweets);
}

function parseDiskTweetFile(filename, callback, donor)
{
  fs.readFile(file, 'utf8', function(err, fileContents) {         // Read in file and pass to callback
    if (err) {
      console.log(err);
    }
    else if (fileContents.substr(0,9) !== "Grailbird") {        // If the file is not valid, skip and notify.
      console.log("-- File " + file + " was not a valid Grailbird data file and was skipped.");
      callback([]);                                           // Still call back an empty array so it's accounted for.
    }
    else 
      callback(parseDiskTweetsFileContent(fileContent, donor));
  });
}
function parseDirectory(dirname)
{
  ...
}