public async System.Threading.Tasks.Task <FriendResult> GetFriendsClosestAsync(int friendId)
{
var friendsList = new List <Friend>(await _friendRepository.List());
var selected = friendsList.Find(x => x.Id == friendId);
if (selected == null)
{
return(null);
}
var distancelist = new List <FriendDistance>();
foreach (var friend in friendsList)
{
if (friend.Id != friendId)
{
var friendDistance = new FriendDistance();
friendDistance.Id = friend.Id;
friendDistance.Name = friend.Name;
friendDistance.CityName = friend.CityName;
friendDistance.Lat = friend.Lat;
friendDistance.Lon = friend.Lon;
var distance = HaversineDistance(selected.Lat, selected.Lon, friend.Lat, friend.Lon);
var distanceFlat = GetFlatDistance(selected.Lat, selected.Lon, friend.Lat, friend.Lon);
friendDistance.Distance = distance;
friendDistance.DistanceFlat = distanceFlat;
distancelist.Add(friendDistance);
await _calculoHistoricoLogRepository.Insert(
new CreateCalculoHistoricoLogCommand(DateTime.Now, Global.loggerUser.login, selected.Name,
selected.Lat, selected.Lon, friend.Name, friend.Lat, friend.Lon, distance));
}
}
FriendResult result = new FriendResult();
result.Friend = selected;
result.Friends = distancelist.OrderBy(i => i.Distance).Take(3).ToList();
return(result);
}
public List <Friend> ListThreFriends(Friend newFriend)
{
var friends = _FriendInterface.List();
List <FriendDistance> listFriendDistances = new List <FriendDistance>();
List <Friend> ThreFriends = new List <Friend>();
MathLog mathLog = new MathLog();
foreach (var friend in friends)
{
FriendDistance friendDistance = new FriendDistance();
var x1 = newFriend.Latitude;
var x2 = friend.Latitude;
var y1 = newFriend.Longitude;
var y2 = friend.Longitude;
var x = x2 - x1;
var y = y2 - y1;
var sx = x * x;
var sy = y * y;
var sum = sx + sy;
var distance = Math.Sqrt(sum);
friendDistance.friend = friend;
friendDistance.distance = distance;
listFriendDistances.Add(friendDistance);
mathLog.NewFriendId = newFriend.Id;
mathLog.NewFriendName = newFriend.Name;
mathLog.NewFriendLatitude = newFriend.Latitude;
mathLog.NewFriendLongitude = newFriend.Longitude;
mathLog.FriendId = friend.Id;
mathLog.FriendName = friend.Name;
mathLog.FriendLatitude = friend.Latitude;
mathLog.FriendLongitude = friend.Longitude;
mathLog.Distance = distance;
}
List <FriendDistance> orderList = listFriendDistances.OrderBy(friend => friend.distance).ToList();
var count = 0;
foreach (var obj in orderList)
{
if ((count < 3))
{
if (obj.distance != 0)
{
ThreFriends.Add(obj.friend);
count++;
}
}
else
{
break;
}
}
return(ThreFriends);
}
