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<?php |
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declare(strict_types=1); |
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namespace App\Crossword\Features\Constructor\Scanner\Grid; |
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use ArrayIterator; |
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use IteratorAggregate; |
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final class Grid implements IteratorAggregate |
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{ |
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/** |
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* @var Cell[] |
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*/ |
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private array $cells; |
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public function __construct(Line ...$lines) |
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{ |
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$this->cells = []; |
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foreach ($lines as $line) { |
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$this->fillLine($line); |
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} |
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} |
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public function getIterator(): ArrayIterator |
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{ |
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return new ArrayIterator($this->cells); |
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} |
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public function isEmpty(): bool |
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{ |
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return 0 === count(array_filter($this->cells, static fn (Cell $cell) => null !== $cell->letter())); |
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} |
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public function shiftCell(Coordinate $coordinate): Cell |
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{ |
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if ($coordinate->inFrame() && $this->exist($coordinate)) { |
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return $this->cells[(string) $coordinate]; |
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} |
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return new Cell($coordinate, null); |
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} |
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public function fillLine(Line $line): void |
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{ |
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/** @var Cell $cell */ |
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foreach ($line as $cell) { |
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if ($cell->isLetter()) { |
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$this->cells[(string) $cell->coordinate()] = $cell; |
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} |
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} |
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array_map([$this, 'fillBlackSquare'], $this->cells); |
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} |
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private function fillBlackSquare(Cell $cell): void |
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{ |
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if ($cell->isLetter()) { |
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$this->searchBlackSquareByYRow($cell->coordinate()); |
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$this->searchBlackSquareByXRow($cell->coordinate()); |
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} |
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} |
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private function searchBlackSquareByYRow(Coordinate $coordinate): void |
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{ |
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$topCell = $this->shiftCell($coordinate->top()); |
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$downCell = $this->shiftCell($coordinate->down()); |
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$topCoordinate = $coordinate->top(); |
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if ($topCoordinate->inFrame() && !$topCell->letter() && $downCell->letter()) { |
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$this->fillCellBlack($coordinate->top()); |
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} |
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if ($topCell->letter() && !$downCell->letter()) { |
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$this->fillCellBlack($coordinate->down()); |
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} |
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} |
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private function searchBlackSquareByXRow(Coordinate $coordinate): void |
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{ |
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$leftCell = $this->shiftCell($coordinate->left()); |
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$rightCell = $this->shiftCell($coordinate->right()); |
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$leftCoordinate = $coordinate->left(); |
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if ($leftCoordinate->inFrame() && !$leftCell->letter() && $rightCell->letter()) { |
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$this->fillCellBlack($coordinate->left()); |
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} |
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if ($leftCell->letter() && !$rightCell->letter()) { |
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$this->fillCellBlack($coordinate->right()); |
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} |
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} |
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private function fillCellBlack(Coordinate $coordinate): void |
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{ |
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$this->cells[(string) $coordinate] = new Cell($coordinate, ''); |
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} |
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private function exist(Coordinate $coordinate): bool |
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{ |
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return array_key_exists((string) $coordinate, $this->cells); |
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} |
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} |
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dykyi-roman /
crossword
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