get exchange rate from wooribank

Code.gs

function getDate(decrease) {
  var date = new Date();
  if(decrease && decrease > 0) {
    date = new Date(date);
    date.setDate(date.getDate() - decrease);
  }
  
  var yyyy = date.getFullYear().toString(),
      dd = date.getDate().toString(),
      mm = (date.getMonth() + 1).toString();
  
  if(dd.length == 1) dd = '0' + dd;
  if(mm.length == 1) mm = '0' + mm;
  
  return yyyy + mm + dd;
}

var baseURL = 'https://spib.wooribank.com/pib/jcc?withyou=ENENG0358&__ID=c008822&BAS_DT=';
function getExchangeHash() {
  var html = '';
  var cache = CacheService.getPublicCache();
  var cached = cache.get('exchange-rate-woori');
  if (cached != null) {
    html = cached;
  } else {
    var decrease = -1;
    while(html.length == 0 || html.indexOf('Today\'s exchange rates are not notified') > -1) {
      decrease++;
      var url = baseURL + getDate(decrease);
      var html = UrlFetchApp.fetch(url).getContentText();
    }
    cache.put('exchange-rate-woori', html, 3600); // cache for 1 hour
  }
  
  var hash = {};
  var h = html.match(/<tbody[\s\S]*?<\/tr>/g).filter(function(tr) {
    return tr.indexOf('<th') == -1;
  });
  h.map(function(tr) {
    var data = tr.match(/\<td[\s\S]*?>*?\<\/(td|th)\>/gm).map(function(td) {
      var datum = td.replace(/\<td[\s\S]*?\>|\<a[\s\S]*?\>|\<\/td\>|\<\/th\>|<\/a>|,/g, '').trim();
      return (isNaN(parseFloat(datum)) ? datum : parseFloat(datum));
    });
    var key = data.shift();
    hash[key] = {
      'country': data[0],
      'foreign-send': data[1],
      'foreign-recv': data[2],
      'cash-buy': data[3],
      'cash-sell': data[4],
      'buy-tc': data[5],
      'standard': data[6],
      'bank-of-korea': data[7],
      'us-calc': data[8]
    };
  });
  
  return hash;
}

function getExchangeRate(currency, type) {
  if(!currency) currency = 'JPY';

  var data = getExchangeHash();
  if(!data.hasOwnProperty(currency)) {
    throw 'Unexcepted currency: ' + currency;
  } else if(!data[currency].hasOwnProperty(type)) {
    throw 'Unexcepted type: ' + type;
  }
  
  return data[currency][type];
}

var cellConfig = {
  'N3': ['JPY', 'standard'],
  'O3': ['JPY', 'cash-buy'],
  'N4': ['GBP', 'standard'],
  'O4': ['GBP', 'cash-buy'],
  'N5': ['EUR', 'standard'],
  'O5': ['EUR', 'cash-buy'],
};
function setCellValue(cell, value, apply) {
  SpreadsheetApp.getActiveSheet().getRange(cell).setValue(value);
  if(apply) SpreadsheetApp.flush();
}
function reloadCell() {
  for(var cell in cellConfig) {
    if(cellConfig.hasOwnProperty(cell)) {
      setCellValue(cell, 'Loading..', true);
      var value = getExchangeRate.apply(null, cellConfig[cell]);
      setCellValue(cell, value, true);
    }
  }
}

pjw

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