private function managePartFlightRelations()
{
$currentPartFlights = $this->mission->partFlights->keyBy('part_flight_id');
foreach ($this->input['mission']['part_flights'] as $partFlightInput) {
// If the partFlight exists, update it, otherwise, create it
if (array_key_exists('part_flight_id', $partFlightInput)) {
$partFlight = $currentPartFlights->pull($partFlightInput['part_flight_id']);
} else {
$partFlight = new PartFlight();
}
// Create part if it is not being reused or otherwise find it
$partInput = array_pull($partFlightInput, 'part');
$part = array_key_exists('part_id', $partInput) ? Part::find($partInput['part_id']) : new Part();
$part->fill($partInput);
$part->save();
$partFlight->part()->associate($part);
$partFlight->mission()->associate($this->mission);
$partFlight->save();
}
// Delete any remaining partflights
if (!$currentPartFlights->isEmpty()) {
$partFlightsToDelete = PartFlight::whereIn('part_flight_id', $currentPartFlights->keys());
// For each partFlight, if it has a part which has not been used elsewhere, also delete it
foreach ($partFlightsToDelete as $partFlightToDelete) {
if ($partFlight->part()->partFlights()->count() > 1) {
$partFlightToDelete->part()->delete();
}
$partFlightToDelete->delete();
}
}
}
