/// <summary>
/// Compute the device positions given the receivings of a packet
/// </summary>
private void locateAndPublish(Device d, Packet p)
{
Room oldRoom = (d.lastPosition != null)?d.lastPosition.room:null;
PositionTools.Position newposition = PositionTools.triangulate(p.Receivings, p.Timestamp);
Publisher.EventType e = Publisher.EventType.Update;
newposition.positionDate = p.Timestamp;
if (oldRoom == null)
{
d.firstPosition = newposition;
e = Publisher.EventType.Appear;
}
else if (oldRoom != newposition.room)
{
PositionTools.Position oldpos = new PositionTools.Position(d.lastPosition);
oldpos.positionDate = newposition.positionDate;
placeInRoomAndPublish(oldRoom, d, oldpos, Publisher.EventType.MoveOut);
e = Publisher.EventType.MoveIn;
}
d.lastPosition = newposition;
placeInRoomAndPublish(d.lastPosition.room, d, newposition, e);
}
internal bool addDevicePosition(string identifier, string mac, string roomname, double xpos, double ypos, double uncertainity, DateTime timestamp, Publisher.EventType evty)
{
return(performNonQuery("insert into devicespositions(identifier,mac,roomname,tm,xpos,ypos,uncertainty,outmovement,xhour,xday,xmonth,xyear) values(@identifier,@mac,@roomname,@tm,@xpos,@ypos,@uncertainty,@outmovement,@xhour,@xday,@xmonth,@xyear)",
"identifier", identifier,
"mac", mac,
"roomname", roomname,
"tm", timestamp,
"xpos", xpos,
"ypos", ypos,
"uncertainty", uncertainity,
"outmovement", (evty == Publisher.EventType.Disappear || evty == Publisher.EventType.MoveOut),
"xhour", timestamp.Hour,
"xday", timestamp.Day,
"xmonth", timestamp.Month,
"xyear", timestamp.Year));
}
/// <summary>
/// Add the device to its room and propagate the new position to the publishers
/// </summary>
private void placeInRoomAndPublish(Room room, Device d, PositionTools.Position p, Publisher.EventType action)
{
if (action == Publisher.EventType.Appear || action == Publisher.EventType.MoveIn)
{
room.addDevice(d);
}
else if (action != Publisher.EventType.Update)
{
room.removeDevice(d);
}
foreach (Publisher pb in publishers)
{
if (pb.supportsOperation(Publisher.DisplayableType.DeviceDevicePosition))
{
pb.publishPosition(d, p, action);
}
if (pb.supportsOperation(Publisher.DisplayableType.SimpleStat))
{
pb.publishStat(room.devicecount, room, p.positionDate, Publisher.StatType.InstantaneousDeviceCount);
}
}
}
