public IEnumerable <T> FilterByMinDistance <T>(IEnumerable <T> latLngItems, int minDistanceBetweenInMetres) where T : ILatitudeLongitude
{
bool hasFirstCoordBeenAdded = false;
List <T> latLngItemsNotNearToOthers = new List <T>();
foreach (T cachedVolunteerDto in latLngItems)
{
if (!hasFirstCoordBeenAdded)
{
hasFirstCoordBeenAdded = true;
latLngItemsNotNearToOthers.Add(cachedVolunteerDto);
}
else
{
bool isTooNearToCoords = false;
foreach (T cachedVolunteerDtoWithNotNearToOthers in latLngItemsNotNearToOthers)
{
double distanceBetweenOtherCoords = _distanceCalculator.GetDistanceInMetres(cachedVolunteerDtoWithNotNearToOthers.Latitude, cachedVolunteerDtoWithNotNearToOthers.Longitude, cachedVolunteerDto.Latitude, cachedVolunteerDto.Longitude);
if (distanceBetweenOtherCoords < minDistanceBetweenInMetres)
{
isTooNearToCoords = true;
break;
}
}
if (!isTooNearToCoords)
{
latLngItemsNotNearToOthers.Add(cachedVolunteerDto);
}
}
}
return(latLngItemsNotNearToOthers);
}
