public void Cancel()
{
if (!Equals(_status, TripStatus.Created) || !Equals(_status, TripStatus.Accepted))
{
throw new TripDomainInvalidOperationException($"Invalid trip status to cancel the trip. Current status: {_status.Name}");
}
_end = DateTime.UtcNow;
_status = TripStatus.Cancelled;
//let's say there is a business rule that says when cancelling the rating is 2 for both user an driver.
_rating = new Rating(2, 2);
AddEvent(new TripUpdatedDomainEvent
{
AggregateRootId = Id,
Action = Action.Cancelled,
Status = _status,
Started = _start,
Ended = _end,
PaymentMethod = _paymentMethod,
Duration = GetDuration(),
UserTripId = _userId
});
}
private void Apply(TripUpdatedDomainEvent @event)
{
_start = @event.Started;
_end = @event.Ended;
_status = @event.Status;
_currentLocation = @event.CurrentLocation;
}
public void SetCurrentLocation(Location currentLocation)
{
if (!Equals(_status, TripStatus.InCourse))
{
throw new TripDomainInvalidOperationException($"Invalid trip status to set the current location. Current status: {_status.Name}");
}
_currentLocation = currentLocation ?? throw new TripDomainArgumentNullException(nameof(currentLocation));
// TODO: handle a tolerance range to determine if current location is the destination
if (Equals(currentLocation, _to))
{
_end = DateTime.UtcNow;
_status = TripStatus.Finished;
}
AddEvent(new TripUpdatedDomainEvent
{
AggregateRootId = Id,
Action = Action.UpdatedCurrentLocation,
Status = _status,
Started = _start,
Ended = _end,
CurrentLocation = currentLocation,
Duration = GetDuration(),
Distance = GetDistance(),
PaymentMethod = _paymentMethod,
UserTripId = _userId
});
}
public void FinishEarlier()
{
if (!Equals(_status, TripStatus.InCourse))
{
throw new TripDomainInvalidOperationException($"Invalid trip status to finish the trip. Current status: {_status.Name}");
}
_end = DateTime.UtcNow;
_status = TripStatus.Finished;
_to = _currentLocation;
AddEvent(new TripUpdatedDomainEvent
{
AggregateRootId = Id,
Action = Action.FinishedEarlier,
Status = _status,
Started = _start,
Ended = _end,
Duration = GetDuration(),
Distance = GetDistance(),
PaymentMethod = _paymentMethod,
UserTripId = _userId,
ConnectionId = _connectionId
});
}
private void Apply(TripUpdated @event)
{
Id = @event.AggregateRootId;
_end = @event.Ended;
_start = @event.Started;
_status = @event.Status;
_currentLocation = @event.CurrentLocation;
}
public Trip(Guid id, int userId, int driverId, Location from, Location to, PaymentMethod paymentMethod, string plate, string brand, string model) : base(id)
{
if (userId <= 0)
{
throw new TripDomainArgumentNullException(nameof(userId));
}
if (driverId <= 0)
{
throw new TripDomainArgumentNullException(nameof(driverId));
}
if (string.IsNullOrWhiteSpace(plate))
{
throw new TripDomainArgumentNullException(nameof(plate));
}
if (string.IsNullOrWhiteSpace(brand))
{
throw new TripDomainArgumentNullException(nameof(brand));
}
if (string.IsNullOrWhiteSpace(model))
{
throw new TripDomainArgumentNullException(nameof(model));
}
if (from == null)
{
throw new TripDomainArgumentNullException(nameof(from));
}
if (to == null)
{
throw new TripDomainArgumentNullException(nameof(to));
}
if (Equals(from, to))
{
throw new TripDomainInvalidOperationException("Destination and origin can't be the same.");
}
_paymentMethod = paymentMethod ?? throw new TripDomainArgumentNullException(nameof(paymentMethod));
_create = DateTime.UtcNow;
_status = TripStatus.Created;
_userId = userId;
_driverId = driverId;
_from = from;
_to = to;
_vehicleInformation = new VehicleInformation(plate, brand, model);
AddEvent(new TripCreatedDomainEvent
{
AggregateRootId = Id,
VehicleInformation = _vehicleInformation,
UserTripId = _userId,
DriverId = _driverId,
From = _from,
To = _to,
PaymentMethod = _paymentMethod,
TimeStamp = _create,
Status = _status
});
}
public void Accept()
{
_status = TripStatus.Accepted;
AddEvent(new TripUpdated
{
AggregateRootId = Id,
Action = Action.Accepted,
Status = _status
});
}
// Applies events after load an object from event store. (kinda memento pattern)
private void Apply(TripCreatedDomainEvent @event)
{
Id = @event.AggregateRootId;
_status = @event.Status;
_create = @event.TimeStamp;
_driverId = @event.DriverId;
_from = @event.From;
_to = @event.To;
_userId = @event.UserTripId;
_vehicleInformation = @event.VehicleInformation;
_paymentMethod = @event.PaymentMethod;
}
public void Accept()
{
if (!Equals(_status, TripStatus.Created))
{
throw new TripDomainInvalidOperationException($"Invalid trip status to accept the trip. Current status: {_status.Name}");
}
_status = TripStatus.Accepted;
AddEvent(new TripUpdatedDomainEvent
{
AggregateRootId = Id,
Action = Action.Accepted,
Status = _status
});
}
public void FinishEarlier()
{
_end = DateTime.UtcNow;
_status = TripStatus.Finished;
_to = _currentLocation;
AddEvent(new TripUpdated
{
AggregateRootId = Id,
Action = Action.FinishedEarlier,
Status = _status,
Started = _start,
Ended = _end
});
}
public void Start()
{
if (!Equals(_status, TripStatus.Accepted))
{
throw new TripDomainInvalidOperationException($"Before to start the trip, it should be accepted. Current status: {_status.Name}");
}
_start = DateTime.UtcNow;
// we're assuming that the driver already picked up the user.
_status = TripStatus.InCourse;
AddEvent(new TripUpdatedDomainEvent
{
AggregateRootId = Id,
Action = Action.Started,
Status = _status,
Started = _start
});
}