function list_stop_times($route, $time, $gps_active, $singleStopId=NULL) {
$stops = Array();
$schedStops = ShuttleSchedule::get_next_scheduled_loop($route, $time);
$nbStopsInfo = NextBusReader::get_route_info($route);
$interval = ShuttleSchedule::get_interval($route);
$end_time = ShuttleSchedule::get_last_run($route, $time) + $interval;
// this array will contain the stops to be highlighted
$upcoming_stops = Array();
$previous_time = 0;
if ($gps_active) {
$nbPredictions = NextBusReader::get_predictions($route, $time);
}
if (!$nbPredictions) {
// this condition might occur because we have a delay in
// deciding the gps is offline after the bus has actually
// gone out of service
$gps_active = FALSE;
}
// this gives an array of seconds until next arrival
// at each stop
foreach ($schedStops as $index => $stop) {
$stopData = Array();
$stopId = $stop['nextBusId'];
$stopData['id'] = $stopId;
$stopData['title'] = $stop['title'];
$stopData['lat'] = $nbStopsInfo[$stopId]['lat'];
$stopData['lon'] = $nbStopsInfo[$stopId]['lon'];
$stopData['next'] = $stop['nextScheduled'];
if ($gps_active && $stopData['next'] !== 0) {
$stopData['predictions'] = Array();
if (!$nbPredictions[$stopId]) {
error_log("no predictions for $stopId on route $route. predictions:" . serialize($nbPredictions));
continue;
}
sort($nbPredictions[$stopId]);
$firstPrediction = array_shift($nbPredictions[$stopId]);
$stopData['next'] = $time + $firstPrediction;
foreach ($nbPredictions[$stopId] as $prediction) {
if ($time + (int) $prediction > $end_time) {
break;
}
$stopData['predictions'][] = $prediction - $firstPrediction;
}
}
// short circuit if a single stop is requested
if ($stopId == $singleStopId) {
return $stopData;
}
if ($stopData['next'] < $previous_time && $stopData['next'] - $time < $interval) {
$stopData['upcoming'] = TRUE;
}
$stops[] = $stopData;
$previous_time = $stopData['next'];
}
if ($stops[0]['next'] < $stops[count($stops) - 1]['next'] && $stops[0]['next'] - $time < $interval) {
$stops[0]['upcoming'] = TRUE;
}
return $stops;
}
