void OnManipulate()
{
if (holder.HeldId == Virus.Id.Null)
{
var column = VirusFromPosition(pos => pos.X == holder.X).OrderByDescending(v => v.VirusPosition.Y);
if (column.Count() < 1)
{
return;
}
var toTake = column.First();
holder.HeldId = toTake.VirusId;
Change.Invoke(toTake.VirusId, toTake.VirusPosition, Position.Hand());
}
else
{
var toPlace = VirusFromId(holder.HeldId).First();
var end = crowd.Select(v => v.VirusPosition)
.Where(pos => pos.X == holder.X)
.OrderByDescending(pos => pos.Y)
.Select(pos => pos.Y + 1)
.DefaultIfEmpty(1)
.First();
Change.Invoke(toPlace.VirusId, Position.Hand(), Position.OnBoard(holder.X, end));
holder.HeldId = Virus.Id.Null;
}
}
void OnDrop()
{
// Shift all virus down
foreach (var v in crowd)
{
if (v.VirusPosition.IsHand)
{
continue;
}
Change.Invoke(v.VirusId,
v.VirusPosition,
v.VirusPosition.WithY(v.VirusPosition.Y + 1)
);
}
var grades = Enum.GetValues(typeof(Virus.Grade));
var newRow = Enumerable.Range(1, Width).Select(i => {
var v = new Virus();
v.VirusPosition = Position.OnBoard(i, 1);
v.VirusGrade = (Virus.Grade)grades.GetValue(rand.Next(grades.Length));
return(v);
});
foreach (var v in newRow)
{
Spawn.Invoke(v);
}
}
public Position WithY(int newY)
{
return(Position.OnBoard(X, newY));
}
public Position WithX(int newX)
{
return(Position.OnBoard(newX, Y));
}
