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Revision Autor Zeilennr. Zeile
148 lars 1 
<?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 <colinodell@gmail.com>
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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 $node): ?Node
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    {
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        foreach ($node->iterator() as $n) {
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            if (\call_user_func($this->condition, $n)) {
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                return $n;
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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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        $resultCount = 0;
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        foreach ($node->iterator() as $n) {
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            if ($resultCount >= $limit) {
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                break;
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            }
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            if (! \call_user_func($this->condition, $n)) {
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                continue;
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            }
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            ++$resultCount;
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            yield $n;
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        }
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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 fn (Node $node): bool => $node instanceof $class;
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    }
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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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     * @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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}