/// <summary>
/// Makes a withdrawal of <paramref name="amount"/> from an account with specified <paramref name="iban"/>
/// </summary>
/// <param name="iban">IBAN of an account to make withdrawal</param>
/// <param name="amount">withdrawal amount</param>
/// <returns>new account balance</returns>
/// <exception cref="ArgumentException">withdrawal amount is lesser than minimal</exception>
public decimal MakeWithdrawal(string iban, decimal amount)
{
if (string.IsNullOrWhiteSpace(iban))
{
throw new ArgumentException("No IBAN is given.", "IBAN");
}
if (amount < MINWITHDRAWAL)
{
throw new ArgumentException("Minimum withdrawal amount is " + MINWITHDRAWAL.ToString("C"));
}
var account = BankAccountMapper.FromDTO(Storage.GetAccount(iban));
if (amount > account.Balance)
{
throw new InvalidOperationException("account balance is less than withdrawal amount");
}
account.Balance -= amount;
account.BonusPoints -= BonusCalculator.CalculateWithdrawalBonus(account, amount);
Storage.UpdateAccount(BankAccountMapper.ToDTO(account));
return(account.Balance);
}
/// <summary>
/// Opens a new account for <paramref name="holder"/> with <paramref name="startBalance"/>.
/// </summary>
/// <param name="holder">person's full name</param>
/// <param name="startBalance">first deposit amount</param>
/// <returns>IBAN of a new account</returns>
/// <exception cref="ArgumentException">Start balance is lesser than minimal.</exception>
public string OpenAccount(string holder, decimal startBalance)
{
if (string.IsNullOrWhiteSpace(holder))
{
throw new ArgumentException("No significant characters are given.", "holder");
}
if (startBalance < MINDEPOSIT)
{
throw new ArgumentException($"Cannot create a bank account with balance lesser than {MINDEPOSIT}");
}
BankAccount account;
if (startBalance <= 1000)
{
account = new StandardAccount(IBANGenerator.GenerateIBAN(), holder, startBalance, bonusPoints: 0);
}
else if (startBalance <= 10000)
{
account = new GoldAccount(IBANGenerator.GenerateIBAN(), holder, startBalance, bonusPoints: 5);
}
else
{
account = new PlatinumAccount(IBANGenerator.GenerateIBAN(), holder, startBalance, bonusPoints: 10);
}
Storage.AddAccount(BankAccountMapper.ToDTO(account));
return(account.IBAN);
}
/// <summary>
/// Makes a deposit of <paramref name="amount"/> to an account with specified <paramref name="iban"/>.
/// </summary>
/// <param name="iban">IBAN of an account to make deposit</param>
/// <param name="amount">deposit amount</param>
/// <returns>new account balance</returns>
/// <exception cref="ArgumentException">deposit amount is lesser than minimal</exception>
public decimal MakeDeposit(string iban, decimal amount)
{
if (string.IsNullOrWhiteSpace(iban))
{
throw new ArgumentException("No IBAN is given.", "IBAN");
}
if (amount < MINDEPOSIT)
{
throw new ArgumentException("Minimum deposit amount is " + MINDEPOSIT.ToString("C"));
}
var account = BankAccountMapper.FromDTO(Storage.GetAccount(iban));
account.Balance += amount;
account.BonusPoints += BonusCalculator.CalculateDepositBonus(account, amount);
Storage.UpdateAccount(BankAccountMapper.ToDTO(account));
return(account.Balance);
}