public WordMapper()
{
AlphabetGenerator generator = new AlphabetGenerator();
var upperCase = generator.CapitalLetters;
var lowerCase = generator.LowerCaseLetters;
_forwardDictionary = new CharDictionary(upperCase, lowerCase);
_inverseDictionary = new CharDictionary(upperCase.Backwards().ToList(), lowerCase.Backwards().ToList());
}
public void Encrypt()
{
AlphabetGenerator alphabet = new AlphabetGenerator(Keyword);
char[] unencryptedMessage = MessageString.ToCharArray();
char[] encryptedMessage = new char[MessageString.Length];
int alphabetMatrixLineNumber = 0;
for (int i = 0; i < unencryptedMessage.Length; i++)
{
// All the letters in the charToIntDictionary are stored in upper case, so it's important that each letter is converted to an uppercase value
// or else the Dictionary search will fail
char letter = char.ToUpper(unencryptedMessage[i]);
if (!char.IsLetter(letter))
{
encryptedMessage[i] = letter;
continue;
}
// If the loop has iterated through every row in the alphabetMatrix, it will be reset to start on the first row again
if (alphabetMatrixLineNumber == alphabet.Matrix.GetLength(1))
{
alphabetMatrixLineNumber = 0;
}
// Finds the letter's position in the alphabet and assigns the value that is in it's position in the alphabet matrix
int letterPosition = charToIntDictionary[letter];
encryptedMessage[i] = alphabet.Matrix[letterPosition, alphabetMatrixLineNumber];
alphabetMatrixLineNumber++;
}
MessageString = new string(encryptedMessage);
CreationDate = DateTime.Now;
}
