<?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:----NjEwMjI1MDcwNjk3MTE4NSAzNzg2ODY1Njg5OTU0NzU1IDk5NDY3MTU3MzI5NjI2OTM=