public void UndoMovement()
{
if (_movesHistory.Count > 0)
{
List<Element> elementsList = _movesHistory.Pop();
foreach (var element in elementsList)
{
if (element.Type == ElementType.BoxOnGoal)
{
_goalsFilled++;
}
else if (element.Type == ElementType.Goal &&
_level[element.Row][element.Column].Type == ElementType.BoxOnGoal)
{
_goalsFilled--;
}
_level[element.Row][element.Column].Type = element.Type;
}
_player = elementsList[0];
}
}
public void LoadLevel(Level level)
{
Width = level.Width;
Height = level.Height;
_goalsCount = 0;
_goalsFilled = 0;
_level = new Element[level.Data.Length][];
for (int row = 0; row < level.Data.Length; row++)
{
_level[row] = new Element[level.Data[row].Length];
for (int column = 0; column < level.Data[row].Length; column++)
{
_level[row][column] = new Element() {Row = row, Column = column};
switch (level.Data[row][column])
{
case '@':
_level[row][column].Type = ElementType.Player;
_player = _level[row][column];
break;
case '+':
_level[row][column].Type = ElementType.PlayerOnGoal;
_player = _level[row][column];
break;
case '#':
_level[row][column].Type = ElementType.Wall;
break;
case '$':
_level[row][column].Type = ElementType.Box;
break;
case '*':
_level[row][column].Type = ElementType.BoxOnGoal;
_goalsCount++;
_goalsFilled++;
break;
case '.':
_level[row][column].Type = ElementType.Goal;
_goalsCount++;
break;
case ' ':
_level[row][column].Type = ElementType.Floor;
break;
}
}
}
_movesHistory.Clear();
}
public bool MovePlayer(MoveDirection moveDirection)
{
int newPlayerRow = _player.Row;
int newPlayerColumn = _player.Column;
int newBoxRow = newPlayerRow;
int newBoxColumn = newPlayerColumn;
bool hasMoved = false;
switch (moveDirection)
{
case MoveDirection.Up:
newPlayerRow -= 1;
newBoxRow -= 2;
break;
case MoveDirection.Down:
newPlayerRow += 1;
newBoxRow += 2;
break;
case MoveDirection.Left:
newPlayerColumn -= 1;
newBoxColumn -= 2;
break;
case MoveDirection.Right:
newPlayerColumn += 1;
newBoxColumn += 2;
break;
}
bool isThereAWall = _level[newPlayerRow][newPlayerColumn].Type == ElementType.Wall;
bool isTryingToMoveABox = _level[newPlayerRow][newPlayerColumn].Type == ElementType.Box ||
_level[newPlayerRow][newPlayerColumn].Type == ElementType.BoxOnGoal;
bool canMoveBox = isTryingToMoveABox && (_level[newBoxRow][newBoxColumn].Type == ElementType.Floor ||
_level[newBoxRow][newBoxColumn].Type == ElementType.Goal);
if (!isThereAWall && !(isTryingToMoveABox && !canMoveBox))
{
List<Element> elementsList = new List<Element>()
{
new Element() {Type = _level[_player.Row][_player.Column].Type, Row = _player.Row, Column = _player.Column},
new Element() {Type = _level[newPlayerRow][newPlayerColumn].Type, Row = newPlayerRow, Column = newPlayerColumn}
};
_level[_player.Row][_player.Column].Type = _level[_player.Row][_player.Column].Type == ElementType.PlayerOnGoal ? ElementType.Goal
: ElementType.Floor;
if (_level[newPlayerRow][newPlayerColumn].Type == ElementType.Goal ||
_level[newPlayerRow][newPlayerColumn].Type == ElementType.BoxOnGoal)
{
if (_level[newPlayerRow][newPlayerColumn].Type == ElementType.BoxOnGoal)
{
_goalsFilled--;
}
_level[newPlayerRow][newPlayerColumn].Type = ElementType.PlayerOnGoal;
}
else
{
_level[newPlayerRow][newPlayerColumn].Type = ElementType.Player;
}
if (isTryingToMoveABox)
{
elementsList.Add(new Element() {Type = _level[newBoxRow][newBoxColumn].Type, Row = newBoxRow, Column = newBoxColumn});
if (_level[newBoxRow][newBoxColumn].Type == ElementType.Goal)
{
_level[newBoxRow][newBoxColumn].Type = ElementType.BoxOnGoal;
_goalsFilled++;
if (_goalsFilled == _goalsCount && LevelCompleted != null)
{
LevelCompleted(this, new EventArgs());
}
}
else
{
_level[newBoxRow][newBoxColumn].Type = ElementType.Box;
}
}
_player = _level[newPlayerRow][newPlayerColumn];
_movesHistory.Push(elementsList);
hasMoved = true;
}
return hasMoved;
}