private async Task <Usd> GetDataFromHtmlAsync(string htmlPage)
{
var parser = new HtmlParser();
var document = parser.ParseDocument(htmlPage);
var titleValidation = document.GetElementsByTagName("tr").ElementAtOrDefault(1);
if (titleValidation == null)
{
await _slackHooksService.SendNotification(_httpClient);
return(null);
}
var titleText = titleValidation.GetElementsByTagName("td").ElementAtOrDefault(0);
if (titleText != null && !titleText.InnerHtml.Equals(_bnaSettings.ValidationHtml))
{
await _slackHooksService.SendNotification(_httpClient);
return(null);
}
var usdToday = document.GetElementsByTagName("tr").LastOrDefault();
if (usdToday == null)
{
await _slackHooksService.SendNotification(_httpClient);
return(null);
}
var buy = usdToday.GetElementsByTagName("td").ElementAtOrDefault(1);
var sale = usdToday.GetElementsByTagName("td").ElementAtOrDefault(2);
var date = usdToday.GetElementsByTagName("td").ElementAtOrDefault(3);
if (buy == null || sale == null)
{
await _slackHooksService.SendNotification(_httpClient);
return(null);
}
if (date != null)
{
return new Usd
{
Date = date.InnerHtml,
SaleValue = sale.InnerHtml,
BuyValue = buy.InnerHtml
}
}
;
await _slackHooksService.SendNotification(_httpClient);
return(null);
}
}
protected async Task SendSlackNotification(
string htmlPage,
DateTime dateTime,
CurrencyCodeEnum currencyCode,
Exception e = null)
{
Logger.LogError(e ?? new Exception("Error getting HTML"), "Error getting HTML, title is not valid, please check HTML: {Page}", htmlPage);
await SlackHooksService.SendNotification($"Can't get currency from {currencyCode} currency code, please check Html in the log or if the date is holiday {dateTime.ToUniversalTime():yyyy-MM-dd}");
}