<?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <colinodell@gmail.com>
 *
 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
 *  - (c) John MacFarlane
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Node;

use Dflydev\DotAccessData\Data;
use League\CommonMark\Exception\InvalidArgumentException;

abstract class Node
{
    /** @psalm-readonly */
    public Data $data;

    /** @psalm-readonly-allow-private-mutation */
    protected int $depth = 0;

    /** @psalm-readonly-allow-private-mutation */
    protected ?Node $parent = null;

    /** @psalm-readonly-allow-private-mutation */
    protected ?Node $previous = null;

    /** @psalm-readonly-allow-private-mutation */
    protected ?Node $next = null;

    /** @psalm-readonly-allow-private-mutation */
    protected ?Node $firstChild = null;

    /** @psalm-readonly-allow-private-mutation */
    protected ?Node $lastChild = null;

    public function __construct()
    {
        $this->data = new Data([
            'attributes' => [],
        ]);
    }

    public function previous(): ?Node
    {
        return $this->previous;
    }

    public function next(): ?Node
    {
        return $this->next;
    }

    public function parent(): ?Node
    {
        return $this->parent;
    }

    protected function setParent(?Node $node = null): void
    {
        $this->parent = $node;
        $this->depth  = $node === null ? 0 : $node->depth + 1;
    }

    /**
     * Inserts the $sibling node after $this
     */
    public function insertAfter(Node $sibling): void
    {
        $sibling->detach();
        $sibling->next = $this->next;

        if ($sibling->next) {
            $sibling->next->previous = $sibling;
        }

        $sibling->previous = $this;
        $this->next        = $sibling;
        $sibling->setParent($this->parent);

        if (! $sibling->next && $sibling->parent) {
            $sibling->parent->lastChild = $sibling;
        }
    }

    /**
     * Inserts the $sibling node before $this
     */
    public function insertBefore(Node $sibling): void
    {
        $sibling->detach();
        $sibling->previous = $this->previous;

        if ($sibling->previous) {
            $sibling->previous->next = $sibling;
        }

        $sibling->next  = $this;
        $this->previous = $sibling;
        $sibling->setParent($this->parent);

        if (! $sibling->previous && $sibling->parent) {
            $sibling->parent->firstChild = $sibling;
        }
    }

    public function replaceWith(Node $replacement): void
    {
        $replacement->detach();
        $this->insertAfter($replacement);
        $this->detach();
    }

    public function detach(): void
    {
        if ($this->previous) {
            $this->previous->next = $this->next;
        } elseif ($this->parent) {
            $this->parent->firstChild = $this->next;
        }

        if ($this->next) {
            $this->next->previous = $this->previous;
        } elseif ($this->parent) {
            $this->parent->lastChild = $this->previous;
        }

        $this->parent   = null;
        $this->next     = null;
        $this->previous = null;
        $this->depth    = 0;
    }

    public function hasChildren(): bool
    {
        return $this->firstChild !== null;
    }

    public function firstChild(): ?Node
    {
        return $this->firstChild;
    }

    public function lastChild(): ?Node
    {
        return $this->lastChild;
    }

    /**
     * @return Node[]
     */
    public function children(): iterable
    {
        $children = [];
        for ($current = $this->firstChild; $current !== null; $current = $current->next) {
            $children[] = $current;
        }

        return $children;
    }

    public function appendChild(Node $child): void
    {
        if ($this->lastChild) {
            $this->lastChild->insertAfter($child);
        } else {
            $child->detach();
            $child->setParent($this);
            $this->lastChild = $this->firstChild = $child;
        }
    }

    /**
     * Adds $child as the very first child of $this
     */
    public function prependChild(Node $child): void
    {
        if ($this->firstChild) {
            $this->firstChild->insertBefore($child);
        } else {
            $child->detach();
            $child->setParent($this);
            $this->lastChild = $this->firstChild = $child;
        }
    }

    /**
     * Detaches all child nodes of given node
     */
    public function detachChildren(): void
    {
        foreach ($this->children() as $children) {
            $children->setParent(null);
        }

        $this->firstChild = $this->lastChild = null;
    }

    /**
     * Replace all children of given node with collection of another
     *
     * @param iterable<Node> $children
     */
    public function replaceChildren(iterable $children): void
    {
        $this->detachChildren();
        foreach ($children as $item) {
            $this->appendChild($item);
        }
    }

    public function getDepth(): int
    {
        return $this->depth;
    }

    public function walker(): NodeWalker
    {
        return new NodeWalker($this);
    }

    public function iterator(int $flags = 0): NodeIterator
    {
        return new NodeIterator($this, $flags);
    }

    /**
     * Clone the current node and its children
     *
     * WARNING: This is a recursive function and should not be called on deeply-nested node trees!
     */
    public function __clone()
    {
        // Cloned nodes are detached from their parents, siblings, and children
        $this->parent   = null;
        $this->previous = null;
        $this->next     = null;
        // But save a copy of the children since we'll need that in a moment
        $children = $this->children();
        $this->detachChildren();

        // The original children get cloned and re-added
        foreach ($children as $child) {
            $this->appendChild(clone $child);
        }
    }

    public static function assertInstanceOf(Node $node): void
    {
        if (! $node instanceof static) {
            throw new InvalidArgumentException(\sprintf('Incompatible node type: expected %s, got %s', static::class, \get_class($node)));
        }
    }
}

• [D] Block
• [D] Inline
• [D] Query
• [F] Node.php
  Delete
• [F] NodeIterator.php
  Delete
• [F] NodeWalker.php
  Delete
• [F] NodeWalkerEvent.php
  Delete
• [F] Query.php
  Delete
• [F] RawMarkupContainerInterface.php
  Delete
• [F] StringContainerHelper.php
  Delete
• [F] StringContainerInterface.php
  Delete

How To Payment

Simple Steps to Complete Your Payment Securely and Efficiently

Making a payment on our website is quick and secure. Start by logging in or creating an account. Select your preferred payment method, input the required details, and review the information. Once you confirm everything is correct, click on the "Submit Payment" button. You’ll receive instant confirmation and can track your payment status through your account dashboard. It’s an easy and secure process.

• Go to the Payment Section: Access the payment area on our website or app.
• Choose Your Payment Method: Select your preferred payment option.
• Enter Payment Details: Provide the necessary payment information.
• Verify Your Information: Check that all details are correct.
• Confirm Your Payment: Click "Submit Payment" to complete the transaction.