Source: experiments.js

"use strict";

/**
 * A collection of experiments currently available
 * @param data the json data received from the Prismic API
 * @constructor
 */
function Experiments(data) {
  var drafts = [];
  var running = [];
  if (data) {
    data.drafts && data.drafts.forEach(function (exp) {
      drafts.push(new Experiment(exp));
    });
    data.running && data.running.forEach(function (exp) {
      running.push(new Experiment(exp));
    });
  }
  this.drafts = drafts;
  this.running = running;
}

Experiments.prototype.current = function() {
  return this.running.length > 0 ? this.running[0] : null;
};

/**
 * Get the current running experiment variation ref from a cookie content
 */
Experiments.prototype.refFromCookie = function(cookie) {
  if (!cookie || cookie.trim() === "") return null;
  var splitted = cookie.trim().split(" ");
  if (splitted.length < 2) return null;
  var expId = splitted[0];
  var varIndex = parseInt(splitted[1], 10);
  var exp = this.running.filter(function(exp) {
    return exp.googleId() == expId && exp.variations.length > varIndex;
  })[0];
  return exp ? exp.variations[varIndex].ref() : null;
};

function Experiment(data) {
  this.data = data;
  var variations = [];
  data.variations && data.variations.forEach(function(v) {
    variations.push(new Variation(v));
  });
  this.variations = variations;
}

Experiment.prototype.id = function() {
  return this.data.id;
};

Experiment.prototype.googleId = function() {
  return this.data.googleId;
};

Experiment.prototype.name = function() {
  return this.data.name;
};

function Variation(data) {
  this.data = data;
}

Variation.prototype.id = function() {
  return this.data.id;
};

Variation.prototype.ref = function() {
  return this.data.ref;
};

Variation.prototype.label = function() {
  return this.data.label;
};

module.exports = {
  Experiments: Experiments,
  Variation: Variation
};