public bool CanDonateTo(BloodType other)
{
// O- can donate to anyone/ O+ can donate to any +
if (Letter == "O")
{
return(Sign == '-' || other.Sign == '+');
}
if (Letter == "A" || Letter == "B")
{
if (other.Letter == Letter || other.Letter == "AB")
{
return(Sign == '-' || other.Sign == '+');
}
}
if (Letter == "AB")
{
if (other.Letter == Letter)
{
return(Sign == '-' || other.Sign == '+');
}
}
return(false);
}
public Member(string firstName, string lastName, DateTime dateOfBirth, BloodType memberBloodType, string email)
{
Id = Guid.NewGuid();
FirstName = firstName;
LastName = lastName;
DateOfBirth = dateOfBirth;
MemberBloodType = memberBloodType;
Email = email;
}
public Receiver(string firstName, string lastName, DateTime dateOfBirth, BloodType memberBloodType, string email)
: base(firstName, lastName, dateOfBirth, memberBloodType, email)
{
LastReceivedDate = DateTime.MinValue;
}
public Donor(string firstName, string lastName, DateTime dateOfBirth, BloodType memberBloodType, string email)
: base(firstName, lastName, dateOfBirth, memberBloodType, email)
{
LastDonatedDate = DateTime.MinValue;
NumTimesDonated = 0;
}
public bool CanReceiveFrom(BloodType other)
{
return(other.CanDonateTo(this));
}
