// ReSharper disable once ReturnTypeCanBeEnumerable.Global
public IAction[] Swap(Point src, Point dest)
{
var actions = new List <IAction>
{
new SwapAction
{
Src = new ItemPos(src, Items[src.X, src.Y]),
Dest = new ItemPos(dest, Items[dest.X, dest.Y]),
}
};
_board.Swap(src, dest);
MatchRes match = _board.CalcMatches();
if (match.IsEmpty)
{
actions.Add(new SwapAction
{
Src = new ItemPos(src, Items[src.X, src.Y]),
Dest = new ItemPos(dest, Items[dest.X, dest.Y]),
});
_board.Swap(src, dest); // swap back
}
else
{
while (!match.IsEmpty)
{
IEnumerable <IAction> processed =
ProcessMatch(src, dest, match);
actions.AddRange(processed);
match = _board.CalcMatches();
}
}
return(actions.ToArray());
}
private IEnumerable <IAction> ProcessMatch(Point src,
Point dest,
MatchRes match)
{
var actions = new List <IAction>();
//
var regularDestroy = new HashSet <Point>();
match.MatchLines.ForEach(l => regularDestroy.UnionWith(l));
match.MatchCrosses.ForEach(cr =>
{
(Point[] line1, Point[] line2) = cr;
regularDestroy.UnionWith(line1);
regularDestroy.UnionWith(line2);
});
ItemPos[] regularDestroyPos = regularDestroy
.Select(p => new ItemPos(p, Items[p.X, p.Y]))
.ToArray();
//
var bonuses = new List <ItemPos>();
match.MatchLines.ForEach(line =>
{
ItemPos bonus = CalcBonusSpawn(src, dest, line);
if (bonus != null && bonuses.All(b => b.Pos != bonus.Pos))
{
bonuses.Add(bonus);
}
});
match.MatchCrosses.ForEach(cross =>
{
ItemPos bonus = CalcBonusSpawn(src, dest, cross);
if (bonus != null && bonuses.All(b => b.Pos != bonus.Pos))
{
bonuses.Add(bonus);
}
});
var except = new HashSet <Point>(regularDestroy); // New modified set
var destroyedBy = new Dictionary <ItemPos, ItemPos[]>();
regularDestroyPos
.Where(p => !p.Item.IsRegularShape).ToList()
.ForEach(p => CollectBonusDestroy(p, destroyedBy, except));
//
UpdateBoardOnDestroy(regularDestroyPos, destroyedBy, bonuses);
//
actions.Add(new DestroyAction
{
MatchDestroyedPos = regularDestroyPos,
SpawnBonuses = bonuses.ToArray(),
DestroyedBy = destroyedBy,
});
FallDownPos[] fallen = _board.CalcFallDownPositions().ToArray();
actions.Add(new FallDownAction {
Positions = fallen
});
ItemPos[] spawned = _board.SpawnItems().ToArray();
actions.Add(new SpawnAction {
Positions = spawned
});
return(actions);
}