/**
* @author Bogdan Sliptsov
* <p>This method is used to find all groups within a radius of 1000 meters.
* @param latitude Latitude of requested device
* @param longitude Longitude of requested device
* @return Null 1. If latitude or longitude is null; 2. If there are no groups wihin radius of 1
* km List of groups within radius of 1 km.
*/
public List<Group> getAllGroupsByGPS(Double latitude, Double longitude) {
if (latitude == null || longitude == null) return null;
List<Group> groups = getAllGroups();
List<Group> resultList = new ArrayList<>();
for (Group g : groups) {
System.out.println(distanceGPS(latitude, longitude, g.getLatitude(), g.getLongitude()));
if (distanceGPS(latitude, longitude, g.getLatitude(), g.getLongitude()) <= 1.0) {
resultList.add(g);
}
}
if (resultList.isEmpty()) return null;
return resultList;
}
