public Task <ReadOnlyCollection <ShippingRuleDto> > ListMatchingRulesAsync(int toZipCode, int weightGrams, double volume)
{
var destination = new ZipCode(toZipCode);
var weight = new Weight(weightGrams);
var items = repository.GetAllMethods()
.SelectMany(method => method.Rules.Select(rule => new KeyValuePair <string, ShippingRule>(method.Name, rule)))
.Where(item => destination.IsInRange(item.Value.RangeFrom, item.Value.RangeTo))
.Where(item => weight.IsInRange(item.Value.MinWeight, item.Value.MaxWeight))
.Where(item => volume <= item.Value.MaxVolume)
.Select(item => new ShippingRuleDto
{
MethodName = item.Key,
ZipCodeOrigin = item.Value.Origin,
ZipCodeRangeFrom = item.Value.RangeFrom,
ZipCodeRangeTo = item.Value.RangeTo,
MinWeightGrams = item.Value.MinWeight,
MaxWeightGrams = item.Value.MaxWeight,
MaxVolume = item.Value.MaxVolume,
DeliveryTimeDays = item.Value.DeliveryTime,
PriceCents = item.Value.Price,
AdValorem = item.Value.AdValorem
});
return(Task.FromResult(items.ToReadOnly()));
}
