private void UnitOptionsFlow()
{
Field fieldHit;
// 1) Selecting
if (fieldHit = ray.FieldWithUnitSelector(MouseAction.Down)) // Button Down
{
unitSelected = fieldHit.unit;
unitValidity = CheckUnitValidity(unitSelected);
if (unitValidity.Valid)
{
HighlightUnits(player, false);
Invoke("HighlightLegalMoves", 0.0f);
drag.SetArrowStart(fieldHit);
OnUnitSelected?.Invoke(unitSelected);
}
return;
}
// 2) Holding -> Only for Drag animation
if (fieldHit = ray.Selector <Field>(MouseAction.Held))
{
if (unitSelected == null)
{
return;
}
if (!unitValidity.Valid)
{
return;
}
drag.SetArrowTarget(fieldHit);
return;
}
else if (Input.GetMouseButton(0))
{
drag.Pause();
return;
}
// 3) Releasing
if (Input.GetMouseButtonUp(0) && unitSelected != null)
{
UnhighlightLegalMoves();
}
if (fieldHit = ray.Selector <Field>(MouseAction.Up))
{
if (fieldHit != null && unitSelected != null)
{
Action action = new Action(unitSelected.field, fieldHit);
if (unitValidity.Valid && IsMoveLegal(unitSelected, fieldHit))
{
// Making the actual Move
player.MakeAction(action);
}
else if (fieldHit != unitSelected.field)
{
// Error message printing
Validity worseValidity = unitValidity.GetIfWorse(action.Move.CheckValidity(board));
if (worseValidity.PrintIfInvalid())
{
InfoText.Show(unitSelected.unitName + " can't move like that");
}
HighlightUnits(player, true);
}
else
{
HighlightUnits(player, true);
}
}
}
if (Input.GetMouseButtonUp(0))
{
drag.Stop();
OnUnitDeselected?.Invoke(unitSelected);
unitSelected = null;
unitValidity = null;
if (fieldHit == null)
{
HighlightUnits(player, true);
}
}
}