/// <summary>
/// Generuje liste losowych kodow
/// </summary>
/// <param name="howManyCodes"></param>
/// <param name="codeType"></param>
/// <returns></returns>
public static List <CodeModel> GenerateListOfRandomCodes(int howManyCodes, EanCodeType codeType)
{
//tworzy instancje zwracanej listy
List <CodeModel> outputCodeModelList = new List <CodeModel>();
//inicjalizacja generatora liczb losowych
Random rnd = new Random();
//generuje zadana ilosc kodow
for (int j = 0; j < howManyCodes; j++)
{
StringBuilder sb = new StringBuilder();
//generuje kod o zadanej liczbie znakow
for (int i = 0; i < (int)codeType; i++)
{
sb.Append(rnd.Next(0, 9));
}
//tworzy instancje modelu kodu
CodeModel codeModel = new CodeModel
{
//wypelnia wyszystkie wlasciwosci obiektu
Code = sb.ToString(), IsLengthValid = true, IsCharValid = true
};
//dodaje obiekt do listy
outputCodeModelList.Add(codeModel);
}
//zwraca liste kodow
return(outputCodeModelList);
}
/// <summary>
/// Weryfikuj kod pod wzgledem jego dlugosci i dozwolonych w nim znakow i okresl poprawnosc kodu
/// </summary>
/// <param name="inputCodeModel"></param>
/// <param name="inputCodeType"></param>
/// <returns></returns>
public static bool IsCodeValid(CodeModel inputCodeModel, EanCodeType inputCodeType)
{
//check if code length is valid and set property
inputCodeModel.IsLengthValid = IsLengthValid(inputCodeModel.Code, (int)inputCodeType);
//check if code chars are valid and set property
inputCodeModel.IsCharValid = IsCharValid(inputCodeModel.Code);
//return main state of validation
return(inputCodeModel.IsCharValid && inputCodeModel.IsLengthValid);
}
/// <summary>
/// Wyswietla glowne menu wraz z informacja o liczbie wprowadzonych kodow
/// </summary>
/// <param name="howManyCodes"></param>
/// <returns></returns>
public static string LoadMenu(int howManyCodes, EanCodeType eanCodeType)
{
Console.WriteLine($"Number of {eanCodeType} codes: {howManyCodes}");
Console.WriteLine("Press '1' Input code");
Console.WriteLine("Press '2' Generate list of random codes");
Console.WriteLine("Press '3' Load code list from file");
Console.WriteLine("Press '4' Fix checksums");
Console.WriteLine("Press '5' Print results");
Console.WriteLine("Press 'q' to Exit");
Console.Write("Choose option: ");
return(Console.ReadLine());
}
/// <summary>
/// Naprawia kod numeryczny modyfikujac niepoprawna sume kontrolna
/// </summary>
/// <param name="codes"></param>
/// <param name="codeType"></param>
public static void FixChecksum(List <CodeModel> codeModelList, EanCodeType codeType)
{
if (codeModelList.Any())
{
foreach (var eanCode in codeModelList)
{
if (IsCodeValid(eanCode, codeType))
{
StringBuilder sb = new StringBuilder(eanCode.Code);
sb[((int)codeType) - 1] = CalculateChecksum(eanCode.Code, codeType).ToString()[0];
eanCode.Code = sb.ToString();
eanCode.IsLengthValid = true;
eanCode.IsCharValid = true;
}
}
}
}
/// <summary>
/// Wyliczenie sumy kontrolnej
/// </summary>
/// <param name="inputCode"></param>
/// <returns></returns>
public static int CalculateChecksum(string inputCode, EanCodeType inputCodeLength)
{
//suma cyfr z pozycji nieparzystystych
int sumOfOddNumber = 0;
//suma cyfr z pozycji parzystystych
int sumOfEvenNumber = 0;
//wyliczona wartosc dla sumy kontrolnej
int checkSumForEanCode = 0;
for (int i = 0; i < inputCode.Length - 1; i++)
{
if (int.TryParse(inputCode[i].ToString(), out int result))
{
if (((i + 1) % 2) == 0)
{
sumOfEvenNumber += result;
}
else
{
sumOfOddNumber += result;
}
}
}
//wyliczenie sumy kontrolnej dla odp. kodu EAN.
switch (inputCodeLength)
{
case EanCodeType.EAN8:
checkSumForEanCode = ((10 - (sumOfOddNumber * 3 + sumOfEvenNumber) % 10));
return(checkSumForEanCode == 10 ? 0 : checkSumForEanCode);
case EanCodeType.EAN13:
checkSumForEanCode = ((10 - (sumOfOddNumber + sumOfEvenNumber * 3) % 10));
return(checkSumForEanCode == 10 ? 0 : checkSumForEanCode);
default: throw new Exception("There is no such of code type!");
}
}
