async Task <Ridesharing.StateBase> TryComputeRideOfferState(string userId, RideRelatedRequestStatus offerStatus)
{
string requestId = offerStatus.Id;
string rideId = offerStatus.PendingRideId;
if (string.IsNullOrEmpty(rideId))
{
var requestNotifications = new PendingRideRelatedRequest(userId, requestId);
// FIXME Retrieve old RideOffer corresponding to requestId
return(new OfferPendingState(this, requestNotifications, null));
}
PendingRideStatus status = await App.Current.DataStore.GetPendingRideStatus(rideId);
if (status != null)
{
switch (status.State)
{
case PendingRideStatus.PendingRideState.Confirmed:
if (status.ActiveRideId == null)
{
break;
}
ActiveRideStatus activeRide = await App.Current.DataStore.GetActiveRideStatus(status.ActiveRideId);
if (activeRide == null)
{
break;
}
if (activeRide.RideState == ActiveRideStatus.State.InProgress)
{
return(new RideInProgressState(this, activeRide));
}
break;
case PendingRideStatus.PendingRideState.WaitingOnDriver:
return(new OfferMatchedState(this, new MatchedRideRelatedRequest(userId, requestId, rideId)));
case PendingRideStatus.PendingRideState.WaitingOnRiders:
return(new WaitingForConfirmedState(this, new MatchedRideRelatedRequest(userId, requestId, rideId)));
case PendingRideStatus.PendingRideState.Canceled:
break;
}
}
return(null);
}
async Task <RideRelatedRequestStatus> GetUnexpiredRequest(bool isRideRequest, string userId)
{
var pendingRequestIds = isRideRequest ?
await DataService.Instance.GetPendingRideRequestIds(userId) :
await DataService.Instance.GetPendingRideOfferIds(userId);
foreach (string requestId in pendingRequestIds)
{
RideRelatedRequestStatus status = await App.Current
.DataStore.GetRideRelatedRequestStatus(userId, requestId);
if (status != null && !status.IsExpired)
{
return(status);
}
}
return(null);
}
async Task <Ridesharing.StateBase> GetCurrentState()
{
string userId = App.Current.UserInfo.UserId;
// Check if the user is currently in a ride.
ActiveRideStatus activeRideStatus = await GetRideInProgress(userId);
if (activeRideStatus != null)
{
return(new RideInProgressState(this, activeRideStatus));
}
// Check if user has a ride request.
RideRelatedRequestStatus requestStatus = await GetUnexpiredRequest(true, userId);
if (requestStatus != null)
{
var result = await TryComputeRideRequestState(userId, requestStatus);
if (result != null)
{
return(result);
}
}
// Check if user has a ride offer.
RideRelatedRequestStatus offerStatus = await GetUnexpiredRequest(false, userId);
if (offerStatus != null)
{
var result = await TryComputeRideOfferState(userId, offerStatus);
if (result != null)
{
return(result);
}
}
return(new NoneState(this));
}
public async Task PostRideRelatedRequestStatus(string userId, string requestId, RideRelatedRequestStatus status)
{
if (DataStore == null)
{
return;
}
string data = JsonConvert.SerializeObject(status);
await DataStore.PostStringResource(RideRelatedRequestStatusName(userId, requestId), data);
}
