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<?php |
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declare(strict_types=1); |
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namespace CoenMooij\Sudoku\Generator; |
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use CoenMooij\Sudoku\Puzzle\Difficulty; |
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use CoenMooij\Sudoku\Puzzle\Grid; |
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use CoenMooij\Sudoku\Puzzle\Location; |
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use CoenMooij\Sudoku\Puzzle\Puzzle; |
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use CoenMooij\Sudoku\Validator\DigValidator; |
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class PuzzleGenerator |
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{ |
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/** |
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* @var Grid |
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*/ |
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private $grid; |
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/** |
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* @var DigValidator |
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*/ |
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private $digValidator; |
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public function __construct(DigValidator $digValidator) |
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{ |
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$this->digValidator = $digValidator; |
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} |
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public function generate(Grid $solutionGrid, Difficulty $difficulty): Puzzle |
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{ |
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$this->grid = $solutionGrid; |
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$locationList = $this->getRandomLocations($difficulty); |
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$this->digLocations($difficulty, ...$locationList); |
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return new Puzzle($this->grid); |
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} |
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/** |
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* @return Location[] |
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*/ |
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private function getRandomLocations(Difficulty $difficulty): array |
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{ |
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$locationList = []; |
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$numberOfHoles = $difficulty->getNumberOfHoles(); |
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for ($i = 0; $i < $numberOfHoles; $i++) { |
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do { |
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$location = new Location(random_int(0, 8), random_int(0, 8)); |
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} while ($this->locationInList($location, ...$locationList)); |
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$locationList[] = $location; |
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} |
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return $locationList; |
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} |
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private function digLocations(Difficulty $difficulty, Location ...$locationList): void |
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{ |
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$bound = $difficulty->getBound(); |
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foreach ($locationList as $location) { |
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if ($this->digValidator->isDiggableAndUniquelySolvableAfterDigging($this->grid, $location, $bound)) { |
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$this->grid->empty($location); |
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} |
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} |
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} |
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private function locationInList(Location $needle, Location ...$locationList): bool |
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{ |
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foreach ($locationList as $location) { |
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if (Location::match($needle, $location)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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coenmooij /
sudoku
This check looks for private methods that have been defined, but are not used inside the class.