/*
* Gets the position of the given transfer in terms of longitude and latitude
*/
private Position GetCurrentPoint(OrganTransfer transfer)
{
double degToRad = Math.PI / 180;
double timeToDest = transfer.arrivalTime.ToDateTimeWithSeconds().Subtract(DateTime.Now).TotalSeconds;
double distToDest = timeToDest * 70 / 1852;
double distRads = (Math.PI / (180 * 60)) * distToDest;
double deltaLongitude = transfer.startLon - transfer.endLon;
double x = Math.Cos(transfer.endLat * degToRad) * Math.Sin(deltaLongitude * degToRad);
double y = Math.Cos(transfer.startLat * degToRad) * Math.Sin(transfer.endLat * degToRad) - Math.Sin(transfer.startLat * degToRad) * Math.Cos(transfer.endLat * degToRad) * Math.Cos(deltaLongitude * degToRad);
double bearing = Math.Atan2(x, y) / degToRad - 180;
double currentLat = Math.Asin(Math.Sin(transfer.endLat * degToRad) * Math.Cos(distRads) + Math.Cos(transfer.endLat * degToRad) * Math.Sin(distRads) * Math.Cos(bearing * degToRad));
double test = currentLat / degToRad;
double distanceLon = Math.Atan2(Math.Sin(bearing * degToRad) * Math.Sin(distRads) * Math.Cos(transfer.endLat * degToRad), Math.Cos(distRads) - Math.Sin(transfer.endLat * degToRad) * Math.Sin(currentLat));
double currentLon = ((transfer.endLon * degToRad - distanceLon + Math.PI) % (2 * Math.PI)) - Math.PI;
return(new Position(currentLat / degToRad, currentLon / degToRad));
}
/*
* Starts a new transfer to the hospital closest to the given selectedRecipient but does not add a helicopter to the map
*/
public async Task NewTransferWithoutAddingHelicpoter(DonatableOrgan currentOrgan, User selectedRecipient, Position donorPosition)
{
await InitialiseHospitalsWithoutAddingToMap();
OrganTransfer newOrganTransfer = new OrganTransfer();
newOrganTransfer.id = currentOrgan.id;
newOrganTransfer.receiverId = selectedRecipient.id;
//Find the position of the donor
newOrganTransfer.startLat = donorPosition.Latitude;
newOrganTransfer.startLon = donorPosition.Longitude;
Hospital receiverHospital = null;
//await InitialiseHospitalsWithoutAddingToMap();
foreach (Hospital hospital in hospitals)
{
if (hospital.region.Equals(selectedRecipient.region))
{
receiverHospital = hospital;
}
}
//Find the nearest hospital
newOrganTransfer.endLat = receiverHospital.latitude;
newOrganTransfer.endLon = receiverHospital.longitude;
newOrganTransfer.organType = OrganExtensions.ToOrgan(currentOrgan.organType);
Position HospitalPosition = new Position(receiverHospital.latitude, receiverHospital.longitude);
newOrganTransfer.arrivalTime = new CustomDateTime(DateTime.Now.AddSeconds(distance(donorPosition.Latitude, HospitalPosition.Latitude,
donorPosition.Longitude, HospitalPosition.Longitude, 0, 0) / 70));
TransplantListAPI transplantListAPI = new TransplantListAPI();
await transplantListAPI.InsertTransfer(newOrganTransfer);
await transplantListAPI.SetInTransfer(currentOrgan.id, 1);
}
/*
* Starts a transfer to the hospital closest to the given selectedRecipient and adds the helicopter to the map
*/
public async Task NewTransfer(DonatableOrgan currentOrgan, User selectedRecipient, Position donorPosition)
{
OrganTransfer newOrganTransfer = new OrganTransfer();
newOrganTransfer.id = currentOrgan.id;
newOrganTransfer.receiverId = selectedRecipient.id;
//Find the position of the donor
newOrganTransfer.startLat = donorPosition.Latitude;
newOrganTransfer.startLon = donorPosition.Longitude;
Hospital receiverHospital = null;
//await InitialiseHospitalsWithoutAddingToMap();
foreach (Hospital hospital in hospitals)
{
if (hospital.region.Equals(selectedRecipient.region))
{
receiverHospital = hospital;
}
}
//Find the nearest hospital
newOrganTransfer.endLat = receiverHospital.latitude;
newOrganTransfer.endLon = receiverHospital.longitude;
newOrganTransfer.organType = OrganExtensions.ToOrgan(currentOrgan.organType);
Position HospitalPosition = new Position(receiverHospital.latitude, receiverHospital.longitude);
newOrganTransfer.arrivalTime = new CustomDateTime(DateTime.Now.AddSeconds(distance(donorPosition.Latitude, HospitalPosition.Latitude,
donorPosition.Longitude, HospitalPosition.Longitude, 0, 0) / 70));
TransplantListAPI transplantListAPI = new TransplantListAPI();
if (await transplantListAPI.InsertTransfer(newOrganTransfer) != HttpStatusCode.OK)
{
await DisplayAlert("", "Failed to start transfer (failed to insert transfer)", "OK");
return;
}
if (await transplantListAPI.SetInTransfer(currentOrgan.id, 1) != true)
{
await DisplayAlert("", "Failed to start transfer (failed to set in transfer)", "OK");
return;
}
int TTA = (int)newOrganTransfer.arrivalTime.ToDateTimeWithSeconds().Subtract(DateTime.Now).TotalSeconds;
//int waitingListId = await transplantListAPI.GetWaitingListId((int)newOrganTransfer.receiverId, newOrganTransfer.organType);
//if (waitingListId == 0) {
// await DisplayAlert("", "Failed to start transfer (failed to get waiting list id)", "OK");
// return;
//}
int waitingListId = 0;
foreach (WaitingListItem item in selectedRecipient.waitingListItems)
{
if (item.organType == OrganExtensions.ToOrgan(currentOrgan.organType))
{
waitingListId = item.id;
}
}
AddHelicopter(donorPosition,
HospitalPosition,
newOrganTransfer.organType,
TTA,
newOrganTransfer.receiverId,
waitingListId,
newOrganTransfer.id
);
}
