private void SetDifferenceFromMedianTarget(string difference, ScraperAnalysis analysis)
{
var positive = true;
decimal percentageChange = 0m;
var trimChars = new char[3] {
'+', '-', '%'
};
if (difference.IndexOf('-') == 0)
{
positive = false;
}
difference = difference.Trim(trimChars);
bool isParsable = Decimal.TryParse(difference, out percentageChange);
if (isParsable)
{
if (positive)
{
analysis.DifferenceFromMedianPercentage = percentageChange;
}
else
{
analysis.DifferenceFromMedianPercentage = percentageChange * (-1);
}
}
}
private void SetCurrentRecommendation(IElement analysisText, ScraperAnalysis analysis)
{
var regex = new Regex("\\<[^\\>]*\\>");
var recommendation = regex.Replace(analysisText.InnerHtml, String.Empty);
analysis.CurrentRecommendation = recommendation;
}
private void SetLowMedianHighEstimates(IElement analysisText, ScraperAnalysis analysis)
{
var text = analysisText.InnerHtml;
var percentage = analysisText.Children.Length > 0 ? analysisText.Children[0].InnerHtml : "0";
SetDifferenceFromMedianTarget(percentage, analysis);
var words = text.Split(' ');
for (var i = 0; i < words.Length; i++)
{
if ((i != 0) && (i != words.Length - 1))
{
if (words[i - 1] == "The" && words[i + 1] == "analysts")
{
int numberOfAnalysts = 0;
bool isParsable = Int32.TryParse(words[i], out numberOfAnalysts);
if (isParsable)
{
analysis.NumberOfAnalysts = numberOfAnalysts;
}
i++;
}
if (words[i] == "median" && words[i + 1] == "target" && words[i + 2] == "of")
{
decimal medianTarget = 0m;
bool isParsable = Decimal.TryParse(words[i + 3].TrimEnd(','), out medianTarget);
if (isParsable)
{
analysis.MedianTarget = medianTarget;
}
i = i + 3;
}
if (words[i] == "high" && words[i + 1] == "estimate" && words[i + 2] == "of")
{
decimal highEstimate = 0m;
bool isParsable = Decimal.TryParse(words[i + 3], out highEstimate);
if (isParsable)
{
analysis.HighTarget = highEstimate;
}
i = i + 3;
}
if (words[i] == "low" && words[i + 1] == "estimate" && words[i + 2] == "of")
{
decimal lowEstimate = 0m;
bool isParsable = Decimal.TryParse(words[i + 3].TrimEnd('.'), out lowEstimate);
if (isParsable)
{
analysis.LowTarget = lowEstimate;
}
i = i + 3;
}
}
}
}
private async Task <ScraperAnalysis> GetAnalystView(HttpResponseMessage request)
{
const string lastPriceClassName = "wsod_last";
const string fiftyTwoWeekHighClassName = "val hi";
const string fiftyTwoWeekLowClassName = "val lo";
const string forecastId = "wsod_forecasts";
const string tickerNodeClassName = "wsod_smallSubHeading";
var scrapAnalysis = new ScraperAnalysis();
var response = await request.Content.ReadAsStreamAsync();
var parser = new HtmlParser();
var document = parser.ParseDocument(response);
var tickerNodes = document.GetElementsByClassName(tickerNodeClassName);
INode tickerNode = null;
if (tickerNodes.Length > 0)
{
tickerNode = tickerNodes[0];
}
SetTicker(scrapAnalysis, (IElement)tickerNode);
var lastPriceNodes = document.GetElementsByClassName(lastPriceClassName);
INode lastPriceNode = null;
if (lastPriceNodes.Length > 0)
{
lastPriceNode = lastPriceNodes[0].FirstChild;
}
SetCurrentPrice(scrapAnalysis, (IElement)lastPriceNode);
var fiftyTwoWeekHighNodes = document.GetElementsByClassName(fiftyTwoWeekHighClassName);
INode fiftyTwoWeekHighNode = null;
if (fiftyTwoWeekHighNodes.Length > 0)
{
fiftyTwoWeekHighNode = fiftyTwoWeekHighNodes[0];
}
SetFiftyTwoWeekHigh(scrapAnalysis, (IElement)fiftyTwoWeekHighNode);
var fiftyTwoWeekLowNodes = document.GetElementsByClassName(fiftyTwoWeekLowClassName);
INode fiftyTwoWeekLowNode = null;
if (fiftyTwoWeekLowNodes.Length > 0)
{
fiftyTwoWeekLowNode = fiftyTwoWeekLowNodes[0];
}
SetFiftyTwoWeekLow(scrapAnalysis, (IElement)fiftyTwoWeekLowNode);
var forecast = document.GetElementById(forecastId);
SetAnalystRatings(scrapAnalysis, forecast);
return(scrapAnalysis);
}
private void SetCurrentPrice(ScraperAnalysis analysis, IElement currentPrice)
{
if (currentPrice != null)
{
var valueText = currentPrice.InnerHtml;
var value = 0.0m;
if (Decimal.TryParse(valueText, out value))
{
analysis.CurrentPrice = value;
}
}
}
private void SetTicker(ScraperAnalysis analysis, IElement ticker)
{
if (ticker != null)
{
var exchangeAndTickerName = ticker.InnerHtml;
var unformattedTickerName = exchangeAndTickerName.Split(':');
if (unformattedTickerName.Length >= 2)
{
analysis.Ticker = unformattedTickerName[1].TrimEnd(')');
}
}
}
private void SetFiftyTwoWeekHigh(ScraperAnalysis analysis, IElement fiftyTwoWeekHigh)
{
if (fiftyTwoWeekHigh != null)
{
var valueText = fiftyTwoWeekHigh.InnerHtml;
var value = 0.0m;
if (Decimal.TryParse(valueText, out value))
{
analysis.FiftyTwoWeekHigh = value;
analysis.DecreaseFromFiftyTwoWeekHigh = analysis.FiftyTwoWeekHigh - analysis.CurrentPrice;
analysis.DecreaseFromFiftyTwoWeekHighPercentage = Decimal.Round(((analysis.DecreaseFromFiftyTwoWeekHigh / analysis.FiftyTwoWeekHigh) * 100), 2);
}
}
}
private void SetFiftyTwoWeekLow(ScraperAnalysis analysis, IElement fiftyTwoWeekLow)
{
if (fiftyTwoWeekLow != null)
{
var valueText = fiftyTwoWeekLow.InnerHtml;
var value = 0.0m;
if (Decimal.TryParse(valueText, out value))
{
analysis.FiftyTwoWeekLow = value;
analysis.IncreaseFromFiftyTwoWeekLow = analysis.CurrentPrice - analysis.FiftyTwoWeekLow;
analysis.IncreaseFromFiftyTwoWeekLowPercentage = Decimal.Round(((analysis.IncreaseFromFiftyTwoWeekLow / analysis.FiftyTwoWeekLow) * 100), 2);
}
}
}
private void SetAnalystRatings(ScraperAnalysis analysis, IElement forecast)
{
if (forecast != null)
{
var analysisText = forecast.GetElementsByTagName("p");
for (var j = 0; j < analysisText.Length; j++)
{
if (j == 0)
{
SetLowMedianHighEstimates(analysisText[0], analysis);
}
if (j == 1)
{
SetCurrentRecommendation(analysisText[1], analysis);
break;
}
}
}
}
