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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
namespace Demo | |
{ | |
public class ShipmentAggregateRoot | |
{ | |
private SortedList<int, Stop> Stops { get; } = new(); | |
private ShipmentAggregateRoot(IReadOnlyList<Stop> stops) | |
{ | |
for(var x = 0; x < stops.Count; x++) | |
{ | |
Stops.Add(x, stops[x]); | |
} | |
} | |
public static ShipmentAggregateRoot Factory(PickupStop pickup, DeliveryStop delivery) | |
{ | |
return new ShipmentAggregateRoot(new Stop[] { pickup, delivery }); | |
} | |
public static ShipmentAggregateRoot Factory(Stop[] stops) | |
{ | |
if (stops.Length < 2) | |
{ | |
throw new InvalidOperationException("Shipment requires at least 2 stops."); | |
} | |
if (stops.First() is not PickupStop) | |
{ | |
throw new InvalidOperationException("First stop must be a Pickup"); | |
} | |
if (stops.Last() is not DeliveryStop) | |
{ | |
throw new InvalidOperationException("first stop must be a Pickup"); | |
} | |
return new ShipmentAggregateRoot(stops); | |
} | |
public void Arrive(int stopId) | |
{ | |
var currentStop = Stops.SingleOrDefault(x => x.Value.StopId == stopId); | |
if (currentStop.Value == null) | |
{ | |
throw new InvalidOperationException("Stop does not exist."); | |
} | |
var previousStopsAreNotDeparted = Stops.Any(x => x.Key < currentStop.Key && x.Value.Status != StopStatus.Departed); | |
if (previousStopsAreNotDeparted) | |
{ | |
throw new InvalidOperationException("Previous stops have not departed."); | |
} | |
currentStop.Value.Arrive(); | |
} | |
public void Pickup(int stopId) | |
{ | |
var currentStop = Stops.SingleOrDefault(x => x.Value.StopId == stopId); | |
if (currentStop.Value == null) | |
{ | |
throw new InvalidOperationException("Stop does not exist."); | |
} | |
if (currentStop.Value is not PickupStop) | |
{ | |
throw new InvalidOperationException("Stop is not a pickup."); | |
} | |
currentStop.Value.Depart(); | |
} | |
public void Deliver(int stopId) | |
{ | |
var currentStop = Stops.SingleOrDefault(x => x.Value.StopId == stopId); | |
if (currentStop.Value == null) | |
{ | |
throw new InvalidOperationException("Stop does not exist."); | |
} | |
if (currentStop.Value is not DeliveryStop) | |
{ | |
throw new InvalidOperationException("Stop is not a delivery."); | |
} | |
currentStop.Value.Depart(); | |
} | |
public bool IsComplete() | |
{ | |
return Stops.All(x => x.Value.Status == StopStatus.Departed); | |
} | |
} | |
public class PickupStop : Stop | |
{ | |
public PickupStop(int stopId) | |
{ | |
StopId = stopId; | |
} | |
} | |
public class DeliveryStop : Stop | |
{ | |
public DeliveryStop(int stopId) | |
{ | |
StopId = stopId; | |
} | |
} | |
public abstract class Stop | |
{ | |
public int StopId { get; protected set; } | |
public StopStatus Status { get; private set; } = StopStatus.InTransit; | |
public Address Address { get; protected set;} | |
public DateTime Scheduled { get; protected set;} | |
public DateTime? Departed { get; protected set; } | |
public void Arrive() | |
{ | |
if (Status != StopStatus.InTransit) | |
{ | |
throw new InvalidOperationException("Stop has already arrived."); | |
} | |
Status = StopStatus.Arrived; | |
} | |
public void Depart() | |
{ | |
if (Status == StopStatus.Departed) | |
{ | |
throw new InvalidOperationException("Stop has already departed."); | |
} | |
if (Status == StopStatus.InTransit) | |
{ | |
throw new InvalidOperationException("Stop hasn't arrived yet."); | |
} | |
Status = StopStatus.Departed; | |
Departed = DateTime.UtcNow; | |
} | |
} | |
public enum StopType | |
{ | |
Pickup, | |
Delivery | |
} | |
public enum StopStatus | |
{ | |
InTransit, | |
Arrived, | |
Departed | |
} | |
public record Address(string Street, string City, string Postal, string Country); | |
} |
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