public static decimal?CalculateCalories(decimal met, decimal?duration, IPerson person)
{
if (duration == null)
{//we don't have time of exercising then we cannot calculate calories
return(null);
}
DateTime?birthday = null;
Gender gender = Gender.Male;
decimal weight = 0;
decimal height = 0;
if (person.Birthday != null)
{
birthday = person.Birthday;
}
gender = person.Gender;
if (person.Wymiary != null)
{
weight = person.Wymiary.Weight;
height = person.Wymiary.Height;
}
if (gender == Gender.NotSet)
{
gender = Gender.Male;
}
if (weight == 0)
{//set default weight if not defined
if (gender == Gender.Female)
{
weight = 70;
}
else
{
weight = 100;
}
}
if (gender == Gender.Male)
{
if (height == 0)
{
height = 177.4M;
}
}
else
{//female
if (height == 0)
{
height = 163M;
}
}
if (birthday == null)
{//if birthday is not set then assume 30 years old
birthday = DateTime.UtcNow.AddYears(-30).AddDays(-1);
}
int age = birthday.Value.GetAge();
return(WilksFormula.CalculateCaloriesUsingMET(gender == Gender.Male, met, TimeSpan.FromSeconds((double)duration), age, weight, height));
}
public void CalculatorUsingMet_Female()
{
var calories = WilksFormula.CalculateCaloriesUsingMET(false, 8.0m, TimeSpan.FromMinutes(60), 32, 93, 188);
Assert.AreEqual(581m, (int)calories);
}
public void CalculatorUsingMet_Male()
{
var calories = WilksFormula.CalculateCaloriesUsingMET(true, 8.0m, TimeSpan.FromMinutes(60), 32, 93, 188);
Assert.AreEqual(689m, calories);
}