egypt-banks-scraper/dist/index.js

Scrape exchange rates from Egypt banks

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getExchangeRates = exports.banksObjects = undefined;

var _promise = require('babel-runtime/core-js/promise');

var _promise2 = _interopRequireDefault(_promise);

var _keys = require('babel-runtime/core-js/object/keys');

var _keys2 = _interopRequireDefault(_keys);

var _banks = require('./banks');

var _banks2 = _interopRequireDefault(_banks);

var _browser = require('./browser');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var banksObjects = {};
_banks2.default.forEach(function (Bank) {
  var bankObject = new Bank();
  banksObjects[bankObject.name.acronym] = bankObject;
});

// get currency rate for currencyCode
function getCurrencyRates(rates, currencyCode) {
  for (var i = 0; i < rates.length; i += 1) {
    var filteredRate = rates[i].code === currencyCode ? rates[i] : undefined;
    if (filteredRate !== undefined) return filteredRate;
  }
  return null;
}

// get rates that have currency rate
function filterCurrencies(rates, currenciesCodes) {
  var filteredRates = [];
  currenciesCodes.forEach(function (code) {
    var rate = getCurrencyRates(rates, code);
    if (rate === null) return;

    filteredRates.push(rate);
  });
  return filteredRates;
}

async function getExchangeRates(banks, currencies) {
  var browser = await (0, _browser.getBrowser)();
  var getRates = async function getRates(bank) {
    try {
      var rates = await bank.scrape(browser);
      // If currencies array empty get all rates
      var filteredRates = currencies.length === 0 ? rates : filterCurrencies(rates, currencies);
      return {
        name: bank.name,
        rates: filteredRates
      };
    } catch (e) {
      // console.log('error on get rates:', e);

      return {
        name: bank.name,
        rates: []
      };
    }
  };

  // If banks array empty get all banks names
  var filteredBanks = banks.length === 0 ? (0, _keys2.default)(banksObjects) : banks;
  var result = {};
  var banksPromises = [];
  var ratesPromises = [];

  for (var i = 0; i < filteredBanks.length; i += 1) {
    var bankName = filteredBanks[i];
    var bank = banksObjects[bankName];

    if (bank) {
      ratesPromises.push(getRates(bank));
    }
  }
  banksPromises = await _promise2.default.all(ratesPromises);

  banksPromises.forEach(function (value) {
    result[value.name.acronym] = value;
  });
  await browser.close();
  return result;
}

// getExchangeRates(['AIB'], []).then((data) => {
//   console.log('data:', data);
// });

exports.banksObjects = banksObjects;
exports.getExchangeRates = getExchangeRates;