private List<MineButton> GetNearbyButtons(MineButton button)
{
if(!AreValidCoordinates(button.XPosition, button.YPosition))
{
return new List<MineButton>();
}
return MineGrid.Children
.OfType<MineButton>()
.Where(b => b.IsEnabled
&& (b.XPosition != button.XPosition || b.YPosition != button.YPosition)
&& b.XPosition > button.XPosition - 2
&& b.XPosition < button.XPosition + 2
&& b.YPosition > button.YPosition - 2
&& b.YPosition < button.YPosition + 2)
.ToList();
}
private void OpenNearbyFields(MineButton button)
{
var nearbyButtons = GetNearbyButtons(button);
foreach(var b in nearbyButtons)
{
OpenField(b);
}
}
private void MarkField(MineButton button)
{
if(_core == null)
{
return;
}
var status = _core.Mark(button.XPosition, button.YPosition);
if(status == MarkFieldStatus.FieldIsMarked)
{
_minesLeft--;
MinesLeftLabel.Text = String.Format(MinesLeftText, _minesLeft > 0 ? _minesLeft : 0);
button.Source = _flag;
}
else
{
_minesLeft++;
MinesLeftLabel.Text = String.Format(MinesLeftText, _minesLeft > 0 ? _minesLeft : 0);
button.Source = _blank;
}
}
private void ServeGameOver(MineButton button)
{
foreach(var child in MineGrid.Children)
{
var b = child as MineButton;
b.IsEnabled = false;
b.BackgroundColor = Color.Silver;
if(!_core.IsMarked(b.XPosition, b.YPosition))
{
if(_core.HasMine(b.XPosition, b.YPosition))
{
b.Source = _mine;
}
}
else if(!_core.HasMine(b.XPosition, b.YPosition))
{
b.Source = _nomine;
}
}
button.Source = _explodedmine;
DisplayAlert("Game over", "BOOM! You lose!", "OK");
}
private void OpenField(MineButton button)
{
if(_core == null)
{
_core = new MineSweeper.Core.MineSweeper(columns, rows, mines, button.XPosition, button.YPosition);
}
if(_core.IsMarked(button.XPosition, button.YPosition))
{
return;
}
button.IsEnabled = false;
button.BackgroundColor = Color.Silver;
var status = _core.Open(button.XPosition, button.YPosition);
switch(status)
{
case FieldStatus.FieldIsMine:
ServeGameOver(button);
return;
case FieldStatus.MinesNearby0:
button.Source = _blank;
OpenNearbyFields(button);
break;
case FieldStatus.MinesNearby1:
button.Source = _1;
break;
case FieldStatus.MinesNearby2:
button.Source = _2;
break;
case FieldStatus.MinesNearby3:
button.Source = _3;
break;
case FieldStatus.MinesNearby4:
button.Source = _4;
break;
case FieldStatus.MinesNearby5:
button.Source = _5;
break;
case FieldStatus.MinesNearby6:
button.Source = _6;
break;
case FieldStatus.MinesNearby7:
button.Source = _7;
break;
default:
button.Source = _8;
break;
}
if(MineGrid.Children.OfType<MineButton>().Count(b => b.IsEnabled) == mines)
{
ServeGameWin();
}
}
