private SeatingMapItem[][] ParseInput()
{
var file = File.ReadAllLines(InputFilePath);
var result = new SeatingMapItem[file.Length][];
for (var i = 0; i < file.Length; i++)
{
result[i] = new SeatingMapItem[file[i].Length];
for (var j = 0; j < file[i].Length; j++)
{
result[i][j] = new SeatingMapItem(j, i, file[i][j]);
}
}
return(result);
}
private static void FillAdjacentSeatingMapItems(SeatingMapItem[][] input, bool partTwo)
{
if (!partTwo)
{
for (var i = 0; i < input.Length; i++)
{
for (var j = 0; j < input[i].Length; j++)
{
input[i][j].AdjacentSeatingMapItems = new List <SeatingMapItem>();
if (j - 1 >= 0)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i][j - 1]);
}
if (j + 1 < input[i].Length)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i][j + 1]);
}
if (i - 1 >= 0)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i - 1][j]);
}
if (i + 1 < input.Length)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i + 1][j]);
}
if (j - 1 >= 0 && i - 1 >= 0)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i - 1][j - 1]);
}
if (j - 1 >= 0 && i + 1 < input.Length)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i + 1][j - 1]);
}
if (j + 1 < input[i].Length && i - 1 >= 0)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i - 1][j + 1]);
}
if (j + 1 < input[i].Length && i + 1 < input.Length)
{
input[i][j].AdjacentSeatingMapItems.Add(input[i + 1][j + 1]);
}
}
}
}
else
{
for (var i = 0; i < input.Length; i++)
{
for (var j = 0; j < input[i].Length; j++)
{
input[i][j].AdjacentSeatingMapItems = new List <SeatingMapItem>();
SeatingMapItem left = null;
SeatingMapItem right = null;
SeatingMapItem up = null;
SeatingMapItem down = null;
SeatingMapItem left_up = null;
SeatingMapItem left_down = null;
SeatingMapItem right_up = null;
SeatingMapItem right_down = null;
var x = j;
var y = i;
while (x - 1 >= 0 && left == null)
{
if (input[y][x - 1].Icon != '.')
{
left = input[y][x - 1];
}
else
{
x--;
}
}
x = j;
y = i;
while (x + 1 < input[i].Length && right == null)
{
if (input[y][x + 1].Icon != '.')
{
right = input[y][x + 1];
}
else
{
x++;
}
}
x = j;
y = i;
while (y - 1 >= 0 && up == null)
{
if (input[y - 1][x].Icon != '.')
{
up = input[y - 1][x];
}
else
{
y--;
}
}
x = j;
y = i;
while (y + 1 < input.Length && down == null)
{
if (input[y + 1][x].Icon != '.')
{
down = input[y + 1][x];
}
else
{
y++;
}
}
x = j;
y = i;
while (x - 1 >= 0 && y - 1 >= 0 && left_up == null)
{
if (input[y - 1][x - 1].Icon == '.')
{
left_up = input[y - 1][x - 1];
}
else
{
x--;
y--;
}
}
x = j;
y = i;
while (x - 1 >= 0 && y + 1 < input.Length && left_down == null)
{
if (input[y + 1][x - 1].Icon == '.')
{
left_down = input[y + 1][x - 1];
}
else
{
x--;
y++;
}
}
x = j;
y = i;
while (x + 1 < input[i].Length && y - 1 >= 0 && right_up == null)
{
if (input[y - 1][x + 1].Icon == '.')
{
right_up = input[y - 1][x + 1];
}
else
{
x++;
y--;
}
}
x = j;
y = i;
while (x + 1 < input[i].Length && y + 1 < input.Length && right_down == null)
{
if (input[y + 1][x + 1].Icon == '.')
{
right_down = input[y + 1][x + 1];
}
else
{
x++;
y++;
}
}
input[i][j].AdjacentSeatingMapItems.AddRange(new[] { left, right, up, down, left_up, left_down, right_up, right_down }.Where(seatItem => seatItem is not null));
}
}
}
}
