private string Details()
{
var totals = _rentals
.Select(rental =>
{
var price = _pricer.GetPrice(rental.Movie);
return(new
{
Amount = price.ComputeAmount(rental.Duration),
Points = price.ComputePoints(rental.Duration),
Movie = rental.Movie.Title
});
})
.Aggregate(
new
{
Amount = (Amount)0m,
Points = 0,
Details = ""
},
(current, detail) => new
{
Amount = current.Amount.Add(detail.Amount),
Points = current.Points + detail.Points,
Details = Invariant($"{current.Details}\t{detail.Movie}\t{detail.Amount.Value:N1}\n")
});
AmountOwed = totals.Amount;
FrequentRenterPoints = totals.Points;
return(totals.Details);
}
