private StringBuilder MoveString(StringBuilder inputSrting, int key, TypeCoding typeCoding)
{
StringBuilder outputString = new StringBuilder();
int tempKey = key;
if (typeCoding == TypeCoding.DECODING)
{
tempKey = -key;
}
for (int i = 0; i < inputSrting.Length; i++)
{
if (Char.IsLetter(inputSrting[i]))
{
int temp = UA_Alphabet.GetNumber(inputSrting[i]);
if (Exist(temp))
{
temp += tempKey;
if (IsCorrectNumber(temp))
{
outputString.Append(UA_Alphabet.GetChar(temp));
}
else
{
if (typeCoding == TypeCoding.DECODING)
{
outputString.Append(UA_Alphabet.GetChar(UA_Alphabet.AlphabetLength + tempKey));
}
else
{
outputString.Append(UA_Alphabet.GetChar(UA_Alphabet.AlphabetLength - tempKey));
}
}
}
else
{
outputString = new StringBuilder(_messageErrorLetter + inputSrting[i]);
return(null);
}
}
}
return(outputString);
}
public StringBuilder DecodingWithoutKey(StringBuilder inputString)
{
StringBuilder res = null;
char offerLetter = TextAnalyser.GetOffenLetter(inputString);
for (int i = 0; i < UA_Alphabet.LoudLetterLenght; i++)
{
int numbetween = UA_Alphabet.GetNumBetweenLetter(offerLetter, UA_Alphabet.GetLoudLetter(i));
StringBuilder partText = GetFirstPart(inputString);
StringBuilder partTextResult = DecodingUA(partText, numbetween);
if (CorrectText(partTextResult))
{
return(DecodingUA(inputString, numbetween));
}
}
return(res);
}