C#Domain/Product.cs
Copy
1
namespace Domain.Entities;
2
 
3
public class Product
4
{
5
    public Guid Id { get; private set; }
6
    public string Name { get; private set; }
7
    public Money Price { get; private set; }
8
    public DateTime CreatedAt { get; private set; }
9
 
10
    private Product() { } // EF Core constructor
11
 
12
    public static Product Create(string name, decimal amount, string currency)
13
    {
14
        if (string.IsNullOrWhiteSpace(name))
15
            throw new ArgumentException("Name cannot be empty.", nameof(name));
16
 
17
        return new Product
18
        {
19
            Id = Guid.NewGuid(),
20
            Name = name,
21
            Price = new Money(amount, currency),
22
            CreatedAt = DateTime.UtcNow,
23
        };
24
    }
25
 
26
    public void UpdatePrice(decimal amount, string currency)
27
    {
28
        Price = new Money(amount, currency);
29
    }
30
}
31
 
32
public record Money(decimal Amount, string Currency)
33
{
34
    public Money
35
    {
36
        if (Amount < 0) throw new ArgumentException("Amount cannot be negative.");
37
        if (string.IsNullOrWhiteSpace(Currency)) throw new ArgumentException("Currency is required.");
38
    }
39
}
40