/// <summary>
/// Make sure the rate for provided currency is known.
/// </summary>
static void EnsureValidRate(Currency currency)
{
//Check if there is data in memory
if (Rates.ContainsKey(currency))
{
if (Rates[currency].Expires > DateTime.Now)
{
return;
}
else
{
Logger.Log(currency + $" rate has expired since {Rates[currency].Expires} @ Currencier");
Rates.Remove(currency);
}
}
else
{
Logger.Log(currency + " rate is not defined @ Currencier");
}
EnsureImportingMeansSetup();
//Extraction
string rawHtml = null;
try
{
//Extraction from Web
rawHtml = fastWeb.Get($"search?hl=en&gl=en&q={currency}+to+{MainCurrency}");
}
catch (FastWeb2Exception)
{
Logger.Log($"Cannot retrieve remote rate for {currency}. Reading all rates from file [{filePath}]");
//Extraction from file
AttemptReadRatesFromFile(currency);
return;
}
//Having remote page pulled down, continue extraction
HtmlDocument document = new HtmlDocument();
document.LoadHtml(rawHtml);
HtmlNode docNode = document.DocumentNode;
string exValue = rateParser.ExtractSingle(docNode);
decimal.TryParse(exValue, NumberStyles.Any, CultureInfo.InvariantCulture, out decimal value);
//Saving
SetRate(currency, new ExpirableRate(value, DefaultExpiration));
//Storing
WriteAllRates();
}
/// <summary>
/// Call for starting parsing by the contained rules, using provided crude information html content string.
/// </summary>
public PageParseResult Parse(string relativeUri = null)
{
if (fastWeb == null)
{
fastWeb = new FastWeb2(Domain);
}
var rawHtml = fastWeb.Get(relativeUri);
//PreprocessPlan
string processedHtml = PagePreprocess == null ? rawHtml : rawHtml.Mold(PagePreprocess);
//interpret as document node
HtmlDocument document = new HtmlDocument();
document.LoadHtml(processedHtml);
HtmlNode entireDocumentNode = document.DocumentNode;
var pageParseResult = new PageParseResult
{
Title = Title.ExtractSingle(node: entireDocumentNode)
};
if (Subtitle != null)
{
pageParseResult.Title += " " + Subtitle.ExtractSingleFromNode(node: entireDocumentNode);
}
if (Thumbnail != null)
{
pageParseResult.ThumbPath = Thumbnail.ExtractSingleFromNode(node: entireDocumentNode);
}
//Parsing Actual Options
if (DefaultOptionMode != DefaultOptionMode.Single)
{
try
{
bool isRegex = OptionsList.SelectMethod == SelectMethod.Regex;
IEnumerable <object> crudeOptions;
if (isRegex)
{
crudeOptions = OptionsList.ExtractList(entireDocumentNode.InnerHtml);
}
else
{
crudeOptions = OptionsList.ExtractList(entireDocumentNode);
}
foreach (var entry in crudeOptions)
{
var optionParseResult = isRegex ? ActualOption.Parse(entry as string) : ActualOption.Parse(entry as HtmlNode);
if (optionParseResult.Price.Amount == 0 && PriceMode != PriceMode.Add)
{
continue;
}
pageParseResult.OptionParseResults.Add(optionParseResult);
}
}
catch (NullReferenceException nrex) when(DefaultOptionMode == DefaultOptionMode.Alongside || DefaultOptionMode == DefaultOptionMode.Alternative)
{
//swallow when actual options absence allowed
Logger.Log(nrex.Message + " @ PageParsing of " + relativeUri);
}
}
//Default Option Logic
if (DefaultOptionMode != DefaultOptionMode.Ignore)
{
if (DefaultOptionMode == DefaultOptionMode.Single)
{
Logger.Log(Domain + " has 1 option per page setup. Add all options separately.");
}
OptionParseResult defaultOption;
try
{
defaultOption = DefaultOption.Parse(entireDocumentNode);
defaultOption.PropertyA = defaultOption.Code = DefaultOptionMode.ToString();
}
catch (NullReferenceException nrex)
{
Logger.Log(nrex.Message + " @ PageParsing of " + relativeUri);
throw;
}
//Prices correction according to Price Mode Setting
if (PriceMode == PriceMode.Add)
{
foreach (OptionParseResult optParseRes in pageParseResult.OptionParseResults)
{
optParseRes.Price.Amount += defaultOption.Price.Amount;
}
}
//Adding default option to the options list, if necessary
if (DefaultOptionMode == DefaultOptionMode.Alongside ||
DefaultOptionMode == DefaultOptionMode.Single ||
(DefaultOptionMode == DefaultOptionMode.Alternative && pageParseResult.OptionParseResults.Count == 0))
{
pageParseResult.OptionParseResults.Add(defaultOption);
}
}
//Prices correction according to the Main Currency & Shop Ordering Rules
foreach (OptionParseResult optParseRes in pageParseResult.OptionParseResults)
{
optParseRes.Price = optParseRes.Price.AsMainCurrency();
var value = optParseRes.Price.Amount;
value /= 1 + OrderDeduction;
if (OrderExtra != null && OrderLimit != null && OrderLimit.AsMainCurrency().Amount > 0)
{
decimal limitValue = OrderLimit.AsMainCurrency().Amount;
decimal orderExtraValue = OrderExtra.AsMainCurrency().Amount;
decimal piecesPerOrder = limitValue / value;
decimal extraPerPiece = orderExtraValue / piecesPerOrder;
value += extraPerPiece;
}
optParseRes.Price.Amount = value;
}
return(pageParseResult);
}