private function getUsersNextMove($handle)
{
$length = $this->board->getLength();
$width = $this->board->getWidth();
$exampleRow = floor($length / 2);
$exampleColumn = floor($width / 2);
$examplePoint = $exampleRow . ',' . $exampleColumn;
$prompt = 'Enter move in the format "[row],[column]" e.g. "' . $examplePoint . '". To toggle a flag on a cell, prefix with an "f" e.g. "f' . $examplePoint . '"';
$move = null;
do {
echo $prompt . ': ';
$input = rtrim(fgets($handle));
try {
$move = Move::parse($input, $length - 1, $width - 1);
} catch (InvalidArgumentException $e) {
echo "\nInvalid move. Please try again.\n";
}
} while ($move === null);
return $move;
}
