Services.DDDocumentOperator/DocumentOperator.Domain/Models/ValueObjects/Base64String.cs

namespace DocumentOperator.Domain.Models.ValueObjects;

public sealed class Base64String
{
    public string Value { get; }

    private Base64String(string value)
    {
        Value = value;
    }

    public static Base64String Create(string value)
    {
        if (string.IsNullOrWhiteSpace(value))
            throw new Common.Exceptions.DomainValidationException("Base64 string cannot be empty.");

        // Validierung: Ist es gültiges Base64?
        try
        {
            Convert.FromBase64String(value);
        }
        catch (FormatException)
        {
            throw new Common.Exceptions.DomainValidationException("Invalid Base64 format.");
        }

        return new Base64String(value);
    }

    public static Base64String FromByteArray(byte[] bytes)
    {
        if (bytes == null || bytes.Length == 0)
            throw new Common.Exceptions.DomainValidationException("Byte array cannot be null or empty.");

        var base64 = Convert.ToBase64String(bytes);
        return new Base64String(base64);
    }

    public byte[] ToByteArray()
    {
        return Convert.FromBase64String(Value);
    }

    public override string ToString() => Value;

    // Equality (wichtig für Value Objects!)
    public override bool Equals(object? obj)
    {
        if (obj is not Base64String other)
            return false;

        return Value == other.Value;
    }

    public override int GetHashCode()
    {
        return Value.GetHashCode();
    }
}