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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\CommonMark\Node; |
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use League\CommonMark\Node\Query\AndExpr; |
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use League\CommonMark\Node\Query\OrExpr; |
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final class Query |
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{ |
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/** @var callable(Node): bool $condition */ |
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private $condition; |
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public function __construct() |
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{ |
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$this->condition = new AndExpr(); |
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} |
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public function where(callable ...$conditions): self |
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{ |
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return $this->andWhere(...$conditions); |
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} |
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public function andWhere(callable ...$conditions): self |
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{ |
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if ($this->condition instanceof AndExpr) { |
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foreach ($conditions as $condition) { |
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$this->condition->add($condition); |
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} |
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} else { |
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$this->condition = new AndExpr($this->condition, ...$conditions); |
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} |
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return $this; |
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} |
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public function orWhere(callable ...$conditions): self |
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{ |
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if ($this->condition instanceof OrExpr) { |
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foreach ($conditions as $condition) { |
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$this->condition->add($condition); |
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} |
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} else { |
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$this->condition = new OrExpr($this->condition, ...$conditions); |
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} |
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return $this; |
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} |
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public function findOne(Node $node): ?Node |
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{ |
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$walker = $node->walker(); |
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while ($event = $walker->next()) { |
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if (! $event->isEntering()) { |
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continue; |
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} |
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if (\call_user_func($this->condition, $node = $event->getNode())) { |
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return $node; |
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} |
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} |
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return null; |
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} |
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/** |
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* @return iterable<Node> |
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*/ |
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public function findAll(Node $node, ?int $limit = PHP_INT_MAX): iterable |
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{ |
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/** @var Node[] $results */ |
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$results = []; |
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$resultCount = 0; |
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$walker = $node->walker(); |
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while ($event = $walker->next()) { |
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if (! $event->isEntering()) { |
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continue; |
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} |
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if (\call_user_func($this->condition, $event->getNode())) { |
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$results[] = $event->getNode(); |
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++$resultCount; |
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} |
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if ($resultCount >= $limit) { |
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break; |
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} |
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} |
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return $results; |
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} |
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/** |
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* @return callable(Node): bool |
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*/ |
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public static function type(string $class): callable |
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{ |
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return static function (Node $node) use ($class): bool { |
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return $node instanceof $class; |
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}; |
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} |
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/** |
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* @param ?callable $condition |
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* |
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* @psalm-param ?callable(Node): bool $condition |
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* |
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* @return callable(Node): bool |
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*/ |
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public static function hasChild(?callable $condition = null): callable |
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{ |
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return static function (Node $node) use ($condition): bool { |
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foreach ($node->children() as $child) { |
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if ($condition === null || $condition($child)) { |
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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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/** |
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* @param ?callable $condition |
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* |
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* @psalm-param ?callable(Node): bool $condition |
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* |
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* @return callable(Node): bool |
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*/ |
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public static function hasParent(?callable $condition = null): callable |
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{ |
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return static function (Node $node) use ($condition): bool { |
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$parent = $node->parent(); |
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if ($parent === null) { |
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return false; |
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} |
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if ($condition === null) { |
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return true; |
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} |
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return $condition($parent); |
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}; |
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} |
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} |
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thephpleague /
commonmark
