Shopify developer intern application task solution [Summer 2016]

Shopicruit Summer 2016 task 1.js

// Global variables
var CATEGORIES_SEARCHED_FOR = ['Keyboard', 'Computer'], MAXIMUM_WEIGHT/*in grams*/ = 100*1000;

function get_maximum_number_of_items_for_categories_searched_for_under_maximum_weight(variants, maximum_weight){
  var current_weight = 0, subtotal = 0, items = {};
  for(index = 0, variants_length = variants.length; index < variants_length; index++){
    if(current_weight + variants[index].grams < maximum_weight){
      items[variants[index].id] = 1;
      current_weight += variants[index].grams;
    } else{break;}
  }
  return items;
}

function update_cart(items){
  $.ajax({
    type: "POST",
    url: "http://shopicruit.myshopify.com/cart/update.js",
    data: {updates: items},
    dataType: "json",
    async: false,
    error: function(){console.log("Failed to add items to the cart.")}
  });
}

function run_shopicruit_task(){
  // Get all products and add to cart
  $.ajax({
    dataType: "json", url: "https://shopicruit.myshopify.com/products.json", async: false,
    success: function (data) {
      // Filter products to categories searched for
      var products = data.products.filter(function(product){
        return ~CATEGORIES_SEARCHED_FOR.indexOf(product.product_type);
      });

      // Get all product variants
      var variants = [].concat.apply([], products.map(function(product){ return product.variants; }));

      // Sort variants by weight
      variants.sort(function(a, b){ return a.grams - b.grams; });

      // Get the maximum number of product variants under the maximum weight
      var items = get_maximum_number_of_items_for_categories_searched_for_under_maximum_weight(variants, MAXIMUM_WEIGHT);

      // Update the cart
      update_cart(items);
    },
    error: function(){console.log("Failed to get products.");}
  });

  // Get the cart, containing
  $.getJSON("http://shopicruit.myshopify.com/cart.js", function(data){
    console.log(data);
    console.log("Your order comprises of " + data.item_count + " items for the total price of $" + (data.total_price/100) +
      ". Your items have a total weight of " + (data.total_weight/1000) + "kg." );
  });
}

Used Shopify's Ajax API

For this code to run, it is assumed that jQuery is available and that it is executing from the Shopicruit Shopify recruitment page.