private IEnumerable <ExchangeRates> GetExchangeRatesFromSources(IEnumerable <ExchangeRateSource> exchangeRateSources, HtmlNode rootNode)
{
const string ExchangeRateDiv = "div.col-xs-12.gray-round-1px-border";
const string ExchangeRateSourceHeading = "h3#homeHeading";
const string ExchangeRateUpdateDateParagraph = "p.no-margin.full-width.black-text";
IEnumerable <HtmlNode> exchangeRateHtmlNodes = rootNode.CssSelect(ExchangeRateDiv);
foreach (HtmlNode exchangeRateNode in exchangeRateHtmlNodes)
{
string exchangeRateSourceText = exchangeRateNode.CssSelect(ExchangeRateSourceHeading).First().InnerText;
string updatedAtText = exchangeRateNode.CssSelect(ExchangeRateUpdateDateParagraph).First().InnerText;
if (!_kinguilaHojeSourceMapper.CanMap(exchangeRateSourceText))
{
continue;
}
ExchangeRateSource exchangeRateSource = _kinguilaHojeSourceMapper.Map(exchangeRateSourceText);
if (!exchangeRateSources.Contains(exchangeRateSource))
{
continue;
}
DateTimeOffset updatedAt = _pageTextualInformationParser.ParseDate(updatedAtText);
IEnumerable <CurrencyRate> currencyRates = GetCurrencyRates(exchangeRateNode);
yield return(new ExchangeRates(exchangeRateSource, updatedAt, currencyRates));
}
}
public async Task <IEnumerable <ExchangeRates> > GetExchangeRateFromAllSources()
{
Uri kinguilaHojeUri = new Uri("http://www.kinguilahoje.com/");
ScrapingBrowser browser = new ScrapingBrowser();
WebPage kinguilaHomePage = await browser.NavigateToPageAsync(kinguilaHojeUri);
return(GetExchangeRatesFromSources(ExchangeRateSource.GetAll(), kinguilaHomePage.Html));
}
