private List<string> GetAlternateAccountNumbers(Account faultyAccount, int digitToConvert)
{
var returnValue = new List<string>();
var digit = faultyAccount.Digits[digitToConvert];
var updatedAccount = string.Empty;
for (int i = 0; i < digit.Characters.Length; i++)
{
var characters = digit.Characters;
var currentCharacter = characters.Substring(i, 1);
if (string.IsNullOrWhiteSpace(currentCharacter))
{
updatedAccount = GetUpdatedAccountNumber(characters, i, '_', faultyAccount.AccountNumber, digitToConvert);
if (!string.IsNullOrEmpty(updatedAccount)) returnValue.Add(updatedAccount);
updatedAccount = GetUpdatedAccountNumber(characters, i, '|', faultyAccount.AccountNumber, digitToConvert);
if (!string.IsNullOrEmpty(updatedAccount)) returnValue.Add(updatedAccount);
}
else
{
updatedAccount = GetUpdatedAccountNumber(characters, i, ' ', faultyAccount.AccountNumber, digitToConvert);
if (!string.IsNullOrEmpty(updatedAccount)) returnValue.Add(updatedAccount);
}
}
return returnValue;
}
public Account RepairedAccount(Account faultyAccount)
{
var alternateNumbers = new List<string>();
for (int i = 0; i < faultyAccount.Digits.Count; i++)
{
alternateNumbers.AddRange(GetAlternateAccountNumbers(faultyAccount, i));
}
if (alternateNumbers.Count.Equals(0))
return faultyAccount;
else if (alternateNumbers.Count.Equals(1))
return new Account
{
AccountNumber = alternateNumbers[0],
CheckSum = 0,
StatusCode = string.Empty
};
else
return new Account
{
AccountNumber = faultyAccount.AccountNumber,
CheckSum = -1,
StatusCode = "AMB"
};
}