/**
* @param Square $square
*
* @return $this
*/
public function nextTo(Square $square)
{
if ($this->nextSquare === null) {
$this->nextSquare = $square;
} else {
$this->nextSquare->nextTo($square);
}
return $this;
}
/**
* @param integer $start
* @param integer $end
*
* @return Square
*/
private function createSquares($start, $end)
{
for ($position = $start; $position <= $end; $position++) {
$this->squares->nextTo(new Square($position));
}
return $this->squares;
}
private function createStartingSquare()
{
$startingSquare = new Square(0);
for ($position = 1; $position <= 45; $position++) {
$startingSquare->nextTo(new Square($position));
}
return $startingSquare;
}
/**
* @param integer $start
* @param integer $length
*
* @return Square
*/
private function createChain($start, $length)
{
$square = new Square($start);
for ($i = $start; $i <= $length; $i++) {
$square->nextTo(new Square($i));
}
return $square;
}
