public Terms New(Waypoint pickup, Waypoint dropoff, string otherTerms)
{
Precondition.MustNotBeNull(pickup, nameof(pickup));
Precondition.MustNotBeNull(dropoff, nameof(dropoff));
if (pickup.Time.End <= _clock.Now)
{
throw new ArgumentOutOfRangeException(
"pickup.Time.End must be in the future, " +
$"but it was {pickup.Time.End}",
nameof(pickup));
}
if (dropoff.Time.End <= _clock.Now)
{
throw new ArgumentOutOfRangeException(
"dropoff.Time.End must be in the future, " +
$"but it was {dropoff.Time.End}",
nameof(dropoff));
}
if (pickup.Time.End > dropoff.Time.End)
{
throw new ArgumentException(
"pickup.Time.End must be earlier than dropoff.Time.End",
nameof(dropoff));
}
return(new Terms
{
Pickup = pickup,
Dropoff = dropoff,
OtherTerms = otherTerms ?? string.Empty,
});
}
public Waypoint(Location place, TimeRange time)
{
Precondition.MustNotBeNull(place, nameof(place));
Precondition.MustNotBeNull(time, nameof(time));
_place = place;
_time = time;
}
private void PriceMustBeNonNegative(Money price)
{
Precondition.MustNotBeNull(price, nameof(price));
if (price.IsNegative)
{
throw new NegativePriceProhibited(price);
}
}
private void BiddingMustBeAllowedNow(ReverseAuctionAggregate reverseAuction)
{
Precondition.MustNotBeNull(reverseAuction, nameof(reverseAuction));
if (!reverseAuction.BiddingAllowed.Includes(_clock.Now))
{
throw new BiddingNotAllowedNow(reverseAuction, _clock);
}
}
public Bid.BidAggregate PlaceBid(
ReverseAuctionAggregate reverseAuction,
TimeRange pickupTime,
TimeRange dropoffTime,
Money price)
{
Precondition.MustNotBeNull(reverseAuction, nameof(reverseAuction));
// RULE: We'd like to delegate validation and precondition
// checking to Factorys. That keeps the Aggregate code
// clean and simple...
// but we need to enforce a relationship between the Auction
// and the new Bid.
BiddingMustBeAllowedNow(reverseAuction);
BidMustConformToAuctionTime(
reverseAuction.Root.BuyerTerms.Pickup,
nameof(pickupTime),
pickupTime);
BidMustConformToAuctionTime(
reverseAuction.Root.BuyerTerms.Dropoff,
nameof(dropoffTime),
dropoffTime);
PriceMustBeNonNegative(price);
var bid = _bidFactory.New(
reverseAuction.Id,
pickupTime,
dropoffTime,
price);
// TODO: According to IDDD, we'd publish a "created" event
// here. I need to fit this into the context of our work
// to wrap DB transactions around business interactions.
// OTOH, there may be no conflict if the domain event
// publisher is flexible enough that in test the event is
// published immediately but in production the event is
// only published when the transaction is committed.
// However, if the consistency boundary IS the aggregate,
// it may not be reasonable to wait.
var aggregate = new Bid.BidAggregate(bid);
_interAggregateEventBus.Publish(
new Bid.Event.BidCreated(aggregate));
return(aggregate);
}
private void BidMustConformToAuctionTime(
Waypoint auctionWaypoint,
string argumentName,
TimeRange bidTime)
{
Precondition.MustNotBeNull(auctionWaypoint, nameof(auctionWaypoint));
Precondition.MustNotBeNull(argumentName, nameof(argumentName));
Precondition.MustNotBeNull(bidTime, nameof(bidTime));
if (!auctionWaypoint.Time.Includes(bidTime))
{
throw new BidTimeDisagreesWithAuctionTime(
auctionWaypoint,
argumentName,
bidTime);
}
}
public Bid New(
int reverseAuctionId,
TimeRange pickupTime,
TimeRange dropoffTime,
Money price)
{
Precondition.MustNotBeNull(pickupTime, nameof(pickupTime));
Precondition.MustNotBeNull(dropoffTime, nameof(dropoffTime));
Precondition.MustNotBeNull(price, nameof(price));
return(new Bid
{
ReverseAuctionId = reverseAuctionId,
PickupTime = pickupTime,
DropoffTime = dropoffTime,
Price = price,
});
}
private static string ValidatedCurrencyCode(string currencyCode)
{
Precondition.MustNotBeNull(currencyCode, nameof(currencyCode));
currencyCode = currencyCode.ToUpper(); // ignore case
if (!Iso4217CurrencyCodePattern.IsMatch(currencyCode))
{
throw new InvalidCurrencyCodeFormat(nameof(currencyCode));
}
if (!Iso4217CurrencyCodes.Contains(currencyCode))
{
throw new UnknownCurrencyCode(currencyCode, nameof(currencyCode));
}
return(currencyCode);
}
public ReverseAuction New(Terms buyerTerms, TimeRange biddingAllowed)
{
Precondition.MustNotBeNull(buyerTerms, nameof(buyerTerms));
Precondition.MustNotBeNull(biddingAllowed, nameof(biddingAllowed));
if (biddingAllowed.End < _clock.Now)
{
throw new ArgumentOutOfRangeException(
"biddingAllowed TimeRange must end in the future, " +
$"but it was {biddingAllowed}");
}
// PERK: Using a "constructor service" eliminates the compiler
// complaining about virtual method calls in the constructor.
return(new ReverseAuction
{
BuyerTerms = buyerTerms,
BiddingAllowed = biddingAllowed,
});
}
/// <summary>
/// DomainEvents have <c>internal</c> constructors because they should
/// only be constructed within the Domain project. Nothing outside
/// the Domain should ever publish or create one.
/// </summary>
internal ReverseAuctionEvent(ReverseAuctionAggregate created)
{
Precondition.MustNotBeNull(created, nameof(created));
Id = created.Id;
}
/// <summary>
/// DomainEvents have <c>internal</c> constructors because they should
/// only be constructed within the Domain project. Nothing outside
/// the Domain should ever publish or create one.
/// </summary>
internal BidEvent(BidAggregate created)
{
Precondition.MustNotBeNull(created, nameof(created));
Id = created.Id;
}
