private Screen GenerateLayout(IReadOnlyList <string> layout, IDictionary <string, TileFactory> mappings)
{
if (layout.Count != _verticalTiles)
{
throw new ArgumentException($"Must have {_verticalTiles} rows");
}
if (layout.Any(r => r.Length != _horizontalTiles * 2))
{
throw new ArgumentException($"Must have {_horizontalTiles} columns");
}
var screen = new Screen();
for (var yy = layout.Count - 1; yy >= 0; yy--)
{
var row = layout[yy];
var y = layout.Count - 1 - yy;
for (var xx = 0; xx < row.Length; xx += 2)
{
var tile = row.Substring(xx, 2);
if (string.IsNullOrWhiteSpace(tile))
{
continue;
}
var tileDetails = mappings[row.Substring(xx, 2)];
var x = xx / 2;
screen.AddTile(tileDetails.Create(x, y, tileDetails.File));
}
}
return(screen);
}