Value Objects

AddressBook.cs

namespace ddd_patterns
{
    public class AddressBook
    {
        public readonly PhoneNumber HomeNumber;
        public readonly PhoneNumber MobileNumber;
        public readonly PhoneNumber WorkNumber;
        public readonly ValidEmailAddress Email;

        public AddressBook(PhoneNumber homeNumber, PhoneNumber mobileNumber, PhoneNumber workNumber, ValidEmailAddress email)
        {
            HomeNumber = homeNumber;
            MobileNumber = mobileNumber;
            WorkNumber = workNumber;
            Email = email;
        }

        public AddressBook WithNewEmailAddress(ValidEmailAddress email)
        {
            return new AddressBook(HomeNumber, MobileNumber, WorkNumber, email);
        }
    }
}

AttendeeId.cs

using System;

 namespace ddd_patterns
{
    public class AttendeeId
    {
        private readonly Guid Id;

        public AttendeeId(Guid id)
        {
            Id = id;
        }
    }
}
   

Money.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ddd_patterns
{
    public class Money
    {
        private readonly decimal Value;

        public Money(decimal value)
        {
            Value = value;
        }

        public Money Add(Money money)
        {
            return new Money(Value + money.Value);
        }
    }
}
   

Name.cs

namespace ddd_patterns
{
    public struct Name 
    {
        public readonly string FirstName;

        public readonly string Surname;
        
        public Name(string firstName, string surname)
        {
            FirstName = firstName;
            Surname = surname;
        }

        public override string ToString()
        {
            return $"firstName:{FirstName};;surname:{Surname}";
        }
    }
}

PhoneNumber.cs

namespace ddd_patterns
{
    public class PhoneNumber
    {
        public readonly string Number;

        public PhoneNumber(string number)
        {
            this.Number = number;
        }
    }
}

Step8_Attendee.cs

using System;

namespace ddd_patterns
{
    public class Attendee
    {
        private readonly Guid _id;
        private readonly Name _name;
        private readonly AddressBook _addressBook;


        public Attendee(Guid id, Name name, AddressBook addressBook)
        {
            _id = id;
            _name = name;
            _addressBook = addressBook;
        }
    }
}

TicketId.cs

using System;

 namespace ddd_patterns
{
    public class TicketId
    {
        private readonly Guid Id;

        public TicketId(Guid id)
        {
            Id = id;
        }
    }
}
   

ValidEmailAddress.cs

using System;

namespace ddd_patterns
{
    public struct ValidEmailAddress
    {
        public readonly string Address;

        private ValidEmailAddress(string email)
        {
            Address = email;
        }

        public ValidEmailAddress FromUnsafe(string email)
        {
            if (!IsValid(email))
            {
                throw new EmailIsNotValidException();
            }
            return new ValidEmailAddress(email);
        }
        
        private static bool IsValid(string email)
        {
            // your not working regex here
            return true;
        }
    }

    public class EmailIsNotValidException : Exception
    {
        
    }
}