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<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Node;
final class StringContainerHelper
{
/**
* Extract text literals from all descendant nodes
*
* @param Node $node Parent node
* @param array<string> $excludeTypes Optional list of node class types to exclude
*
* @return string Concatenated literals
*/
public static function getChildText(Node $node, array $excludeTypes = []): string
{
$text = '';
foreach ($node->iterator() as $child) {
if ($child instanceof StringContainerInterface && ! self::isOneOf($child, $excludeTypes)) {
$text .= $child->getLiteral();
}
}
return $text;
}
/**
* @param string[] $classesOrInterfacesToCheck
*
* @psalm-pure
*/
private static function isOneOf(object $object, array $classesOrInterfacesToCheck): bool
{
foreach ($classesOrInterfacesToCheck as $type) {
if ($object instanceof $type) {
return true;
}
}
return false;
}
}
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