ngn4.io/scripts/data.js

module.exports = function(set, app, data, scriptMethods) {
  var keys = Object.keys(set.generators);
  var cache = {};
  var defaultKey = null;

  for(var i = 0; i < keys.length; ++i) {
    var bindObj = {key: keys[i]}

    var func = (function (req, res) {
      var key = this.key;
      var gen = set.generators[key];

      if(!cache.hasOwnProperty(key)) {
        data.generators[key].catId = key.split('/')[0];
        cache[key] = JSON.stringify(data.generators[key]);
      }

      res.header("Content-Type", "application/json; charset=utf-8");
      res.end(cache[key]);
    }).bind(bindObj);

    app.get('/d/' + keys[i], func);

    if(i === 0) {
      app.get('/d/default', func);
      defaultKey = keys[i];
    }
  }

  scriptMethods.getDefaultDataKey = function() {
    return defaultKey;
  }

  scriptMethods.getInitDataFromCookie = function(cookies) {
    var key;
    if(Object.prototype.hasOwnProperty.call(cookies, 'last_generator')) {
      key = cookies['last_generator'];
    } else {
      key = defaultKey;
    }

    if(!cache.hasOwnProperty(key)) {
      data.generators[key].catId = key.split('/')[0];
      cache[key] = JSON.stringify(data.generators[key]);
    }

    return cache[key];
  }
}