rbxjs-plus/lib/asset/buy.js

A system allowing access to roblox functions.

// Includes
var http = require('../util/http.js').func;
var getProductInfo = require('./getProductInfo.js').func;
var getGeneralToken = require('../util/getGeneralToken.js').func;

// Args
exports.required = [['asset', 'product']];
exports.optional = ['price', 'jar'];

// Define
function buy (jar, token, product, price) {
  var robux = product.PriceInRobux || 0;
  var productId = product.ProductId;
  if (price) {
    if (typeof price === 'number') {
      if (robux !== price) {
        throw new Error('Price requirement not met. Requested price: ' + price + ' Actual price: ' + robux);
      }
    } else if (typeof price === 'object') {
      var high = price.high;
      var low = price.low;
      if (high) {
        if (robux > high) {
          throw new Error('Price requirement not met. Requested price: <=' + high + ' Actual price: ' + robux);
        }
      }
      if (low) {
        if (robux < low) {
          throw new Error('Price requirement not met. Requested price: >=' + low + ' Actual price: ' + robux);
        }
      }
    }
  }
  var httpOpt = {
    url: '//www.roblox.com/API/Item.ashx?rqtype=purchase&productID=' + productId + '&expectedCurrency=1&expectedPrice=' + robux + '&expectedSellerID=' + product.Creator.Id + '&userAssetID=' + product.UserAssetId,
    options: {
      method: 'POST',
      jar: jar,
      headers: {
        'X-CSRF-TOKEN': token
      }
    }
  };
  return http(httpOpt)
  .then(function (body) {
    var json = JSON.parse(body);
    var err = json.errorMsg;
    if (json.showDivID === 'InsufficientFundsView') {
      err = 'You need ' + Math.abs(json.balanceAfterSale) + ' more robux to purchase this item.';
    }
    if (!err) {
      return {productId: productId, price: robux};
    } else {
      throw new Error(err);
    }
  });
}

function runWithToken (args) {
  var jar = args.jar;
  return getGeneralToken({
    jar: jar
  })
  .then(function (token) {
    return buy(jar, token, args.product, args.price);
  });
}

exports.func = function (args) {
  if (!args.product) {
    return getProductInfo({
      asset: args.asset
    })
    .then(function (product) {
      args.product = product;
      return runWithToken(args);
    });
  } else {
    return runWithToken(args);
  }
};