Oli Sturm
38 lines
1020 B
C#
38 lines
1020 B
C#
namespace CsharpFp2.Domain;
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/// Domain entity / aggregate root representing a bank account
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public sealed class Account
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{
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public Guid Id { get; private set; }
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public Money Balance { get; private set; }
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// Often present to satisfy serializers / ORMs.
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private Account()
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{
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Balance = new Money(0);
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}
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public Account(Guid id, Money openingBalance)
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{
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if (openingBalance.Amount < 0)
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throw new ArgumentOutOfRangeException(nameof(openingBalance));
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Id = id;
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Balance = openingBalance;
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}
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// Domain behaviour attached to the entity.
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public void Withdraw(Money amount)
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{
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if (amount.Amount <= 0)
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throw new InvalidOperationException("Withdrawal amount must be positive.");
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// Sometimes, validation is modelled with custom exceptions instead
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if (Balance.Amount - amount.Amount < 0)
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throw new InsufficientBalanceException(Balance, amount);
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Balance = Balance.Subtract(amount);
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}
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}
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