CoenMooij\Sudoku\Serializer\GridSerializer

Complexity

Total Complexity

7

Size/Duplication

Total Lines	35
Duplicated Lines	0 %

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	serialize()	0	8	2
A	getLocationByIndex()	0	6	1
A	deserialize()	0	15	4

<?php

declare(strict_types=1);

namespace CoenMooij\Sudoku\Serializer;

use CoenMooij\Sudoku\Puzzle\Grid;
use CoenMooij\Sudoku\Puzzle\Location;
use LengthException;

class GridSerializer
{
    public static function serialize(Grid $grid): string
    {
        $string = '';
        for ($i = 0; $i < Grid::NUMBER_OF_LOCATIONS; $i++) {
            $string .= (string) $grid->get(self::getLocationByIndex($i));
        }

        return $string;
    }

    public static function deserialize(string $string): Grid
    {
        if (strlen($string) !== Grid::NUMBER_OF_LOCATIONS) {
            throw new LengthException();
        }
        $grid = new Grid();
        for ($i = 0; $i < Grid::NUMBER_OF_LOCATIONS; $i++) {
            $location = self::getLocationByIndex($i);
            $value = (int) $string[$i];
            if (Grid::valueIsValid($value)) {
                $grid->set($location, $value);
            }
        }

        return $grid;
    }

    public static function getLocationByIndex(int $index): Location
    {
        $row = (int) floor($index / Grid::NUMBER_OF_COLUMNS);
        $column = $index % Grid::NUMBER_OF_ROWS;

        return new Location($row, $column);
    }
}