static string FindTheAuthor(string text)
{
AuthorProfile textProfile = new AuthorProfile()
{
Ngrams = GenerateProfile(text), Author = "UNKNOWN"
};
string BestMatchAuthor = "UNKNOWN";
int minDis = int.MaxValue;
// XML serialization/reading variables
DirectoryInfo d = new DirectoryInfo(Environment.CurrentDirectory + $"\\Profiles");
XmlSerializer serializer = new XmlSerializer(typeof(AuthorProfile));
FileStream fileStream;
foreach (var file in d.GetFiles("*.xml"))
{
// Check all xml profiles in /Profile folder
fileStream = new FileStream($"Profiles/{file}", FileMode.Open);
AuthorProfile tmp = (AuthorProfile)serializer.Deserialize(fileStream);
int dis = CompareTwoProfiles(tmp, textProfile);
if (dis <= minDis)
{
minDis = dis;
BestMatchAuthor = tmp.Author;
}
fileStream.Close();
}
//Console.WriteLine(BestMatchAuthor);
return(BestMatchAuthor);
}
/// <summary>
/// Compares two profiles and return their dissimilarity.
/// </summary>
static int CompareTwoProfiles(AuthorProfile profile1, AuthorProfile profile2)
{
int sum = 0;
List <NgramFreq> allNgrams = new List <NgramFreq>();
int indexOfItemInOtherP;
foreach (KeyValuePair <string, int> item in profile1.Ngrams)
{
indexOfItemInOtherP = profile2.Ngrams.IndexOf(item);
allNgrams.Add(new NgramFreq()
{
ngram = item.NGram,
f1 = item.Freq,
f2 = (indexOfItemInOtherP == -1 ? 0 : profile2.Ngrams[indexOfItemInOtherP].Freq)
});
}
foreach (KeyValuePair <string, int> item in profile2.Ngrams)
{
if (!allNgrams.Exists(x => x.ngram == item.NGram))
{
// Ngram was NOT processed yet
indexOfItemInOtherP = profile1.Ngrams.IndexOf(item);
allNgrams.Add(new NgramFreq()
{
ngram = item.NGram,
f1 = (indexOfItemInOtherP == -1 ? 0 : profile1.Ngrams[indexOfItemInOtherP].Freq),
f2 = item.Freq
});
}
}
// Calculate total dissimilarity
foreach (var item in allNgrams)
{
//sum += (int)Math.Floor(Math.Pow(2 * (item.f1 - item.f2) / (item.f1 + item.f2), 2));
sum += (int)Math.Abs(2 * (item.f1 - item.f2) / (item.f1 + item.f2));
}
return(sum);
}
/// <summary>
/// Create a new author profile and save it to a file
/// </summary>
static void DefineNewAuthorProfile(string learnData, string author = null)
{
//StreamWriter file = File.AppendText("profiles.txt");
AuthorProfile authorProfile = new AuthorProfile();
FileStream xmlFile;
XmlSerializer writer = new XmlSerializer(typeof(AuthorProfile));
// Extract only words from text
List <KeyValuePair <string, int> > myList = GenerateProfile(learnData, profileLimit);
// Author's name
string catname;
if (author == null)
{
// Manual author's name input
Console.Write($"Enter authors name:");
catname = Console.ReadLine();
}
else
{
catname = author;
}
if (catname.Length == 0)
{
catname = "UNDEFINED";
}
authorProfile.Author = catname.ToLower();
authorProfile.Ngrams = myList;
Directory.CreateDirectory("Profiles");
xmlFile = File.Create(Environment.CurrentDirectory + $"\\Profiles\\{catname}.xml");
writer.Serialize(xmlFile, authorProfile);
xmlFile.Close();
}