/// <summary>
/// This method runs our bayes spam filter after the threshold was calibrated
/// and prints the results
/// </summary>
/// <param name="folderPath"> Path to the email folder. </param>
private void RunBayesSpamFilter(string folderPath)
{
if (Directory.Exists(folderPath))
{
var isInSpamFolder = folderPath.Equals(spamTestPath);
List <double> errors = new List <double>();
var filePaths = Directory.GetFiles(folderPath);
var spamChecker = new SpamChecker(wordInfoDictionary);
// The spam probabilities of each file are calculated and all the errors are added to a separate list
foreach (var filePath in filePaths)
{
var spamProbability = spamChecker.GetSpamProbability(filePath);
if (isInSpamFolder && spamProbability <= threshold)
{
errors.Add(spamProbability);// These should be spam, but aren't marked by our filter
}
else if (!isInSpamFolder && spamProbability >= threshold)
{
errors.Add(spamProbability);// These should be ham, but aren't marked by our filter
}
}
PrintTestResult(folderPath, isInSpamFolder, errors, filePaths);
}
else
{
throw new DirectoryNotFoundException();
}
}
/// <summary>
/// Count all wrongly marked spam files.
/// </summary>
/// <param name="spamFilePaths"> Path to spam files. </param>
/// <param name="spamChecker"> The checker to use. </param>
/// <returns></returns>
private int GetSpamMarkedAsHamCounter(string[] spamFilePaths, SpamChecker spamChecker)
{
var spamMarkedAsHam = 0;
foreach (var spamFilePath in spamFilePaths)
{
var spamProbability = spamChecker.GetSpamProbability(spamFilePath);
if (spamProbability < threshold)
{
spamMarkedAsHam++;
}
}
return(spamMarkedAsHam);
}
