<?php

namespace League\CommonMark\Node;

use League\CommonMark\Node\Block\AbstractBlock;

/**
 * @implements \IteratorAggregate<int, Node>
 */
final class NodeIterator implements \IteratorAggregate
{
    public const FLAG_BLOCKS_ONLY = 1;

    private Node $node;
    private bool $blocksOnly;

    public function __construct(Node $node, int $flags = 0)
    {
        $this->node       = $node;
        $this->blocksOnly = ($flags & self::FLAG_BLOCKS_ONLY) === self::FLAG_BLOCKS_ONLY;
    }

    /**
     * @return \Generator<int, Node>
     */
    public function getIterator(): \Generator
    {
        $stack = [$this->node];
        $index = 0;

        while ($stack) {
            $node = \array_pop($stack);

            yield $index++ => $node;

            // Push all children onto the stack in reverse order
            $child = $node->lastChild();
            while ($child !== null) {
                if (! $this->blocksOnly || $child instanceof AbstractBlock) {
                    $stack[] = $child;
                }

                $child = $child->previous();
            }
        }
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTQzMDk3Mjc4NjUyMjQ4MSA1NjYwNTc0MzU0MzU5NzYxIDQ4MTI5NTExNjcyMzM5NjA=