public override string Decrypt(string text)
{
List<int> letterIndexes = new List<int>();
StringBuilder outText = new StringBuilder();
foreach (var letter in text)
{
if(letter != '*' && letter != '-')
outText.Append(alphabet.Letters.IndexOf(letter));
else
outText.Append(letter);
}
foreach (var word in outText.ToString().Split('*'))
{
letterIndexes.Add(int.Parse(word));
}
Mathematics.Function resultFuntion = new Mathematics.Function(letterIndexes.ToArray()) / function;
StringBuilder result = new StringBuilder();
foreach (var member in resultFuntion.Members)
{
if (member.Сoefficient < 0)
result.Append(alphabet.Letters[(-1 * member.Сoefficient + alphabet.Quantity) % alphabet.Quantity-1]);
else
result.Append(alphabet.Letters[(member.Сoefficient + alphabet.Quantity) % alphabet.Quantity-1]);
}
return result.ToString();
}
public override string Encrypt(string text)
{
List<int> letterIndexes = new List<int>();
foreach (var letter in text)
{
letterIndexes.Add(alphabet.Letters.IndexOf(letter)+1);
}
Mathematics.Function resultFuntion = new Mathematics.Function(letterIndexes.ToArray()) * function;
StringBuilder tempResult = new StringBuilder();
for (int i = 0; i < resultFuntion.Members.Count; i++)
{
tempResult.Append(resultFuntion.Members[i].Сoefficient);
if (i != resultFuntion.Members.Count - 1)
tempResult.Append("*");
}
StringBuilder result = new StringBuilder();
foreach (var letter in tempResult.ToString())
{
if (letter == '*' || letter == '-')
result.Append(letter);
else
result.Append(alphabet[int.Parse(letter.ToString())]);
}
return result.ToString();
}
public Polinom(Alphabets.Alphabet alphabet, Mathematics.Function function)
{
this.alphabet = alphabet;
this.function = function;
}
