public async Task <List <BeneficiaryResponseModel> > CalculateBenefits(List <BeneficiaryRequestModel> request)
{
List <BeneficiaryResponseModel> response = new List <BeneficiaryResponseModel>();
var tempBag = new ConcurrentBag <BeneficiaryResponseModel>();
//Get constants for calulations - pay periods per year and discount percentage (fraction)
decimal discount = await DataAccess.GetDiscountAsync();
decimal payPeriods = await DataAccess.GetPayPeriodsAsync();
//loop through the beneficiaries in the request and calculate costs for each one.
//Adding simple parellism makes this a bit faster than a standard foreach - avg 1200ms vs 1600ms avg on a foreach
IEnumerable <Task> tasks = request.Select(async b =>
{
BeneficiaryResponseModel beneficiary = new BeneficiaryResponseModel();
//Trim the name to prevent issue with discount eligibility if name contains leading spaces
beneficiary.Name = b.Name.Trim();
beneficiary.Type = b.Type;
decimal yearlyCost = await DataAccess.GetBenefitCostsAsync(b.Type);
//Give the customer a discount if their name is eligible
if (DiscountHandler.EligibleForDiscount(beneficiary.Name))
{
yearlyCost *= (1 - discount);
}
beneficiary.YearCost = yearlyCost;
beneficiary.PeriodCost = decimal.Round((yearlyCost / payPeriods), 2);
tempBag.Add(beneficiary);
});
await Task.WhenAll(tasks);
//Convert the temporary concurrent bag to a list and store it in the response
return(tempBag.ToList());
}
public BenefitCalculator()
{
//Would use DI in production
DiscountHandler = new DiscountHandler();
DataAccess = new DataAccessor();
}
