<?php

declare(strict_types=1);

namespace Termwind\ValueObjects;

use Generator;

/**
 * @internal
 */
final class Node
{
    /**
     * A value object with helper methods for working with DOM node.
     */
    public function __construct(private \DOMNode $node)
    {
    }

    /**
     * Gets the value of the node.
     */
    public function getValue(): string
    {
        return $this->node->nodeValue ?? '';
    }

    /**
     * Gets child nodes of the node.
     *
     * @return Generator<Node>
     */
    public function getChildNodes(): Generator
    {
        foreach ($this->node->childNodes as $node) {
            yield new static($node);
        }
    }

    /**
     * Checks if the node is a text.
     */
    public function isText(): bool
    {
        return $this->node instanceof \DOMText;
    }

    /**
     * Checks if the node is a comment.
     */
    public function isComment(): bool
    {
        return $this->node instanceof \DOMComment;
    }

    /**
     * Compares the current node name with a given name.
     */
    public function isName(string $name): bool
    {
        return $this->getName() === $name;
    }

    /**
     * Returns the current node type name.
     */
    public function getName(): string
    {
        return $this->node->nodeName;
    }

    /**
     * Returns value of [class] attribute.
     */
    public function getClassAttribute(): string
    {
        return $this->getAttribute('class');
    }

    /**
     * Returns value of attribute with a given name.
     */
    public function getAttribute(string $name): string
    {
        if ($this->node instanceof \DOMElement) {
            return $this->node->getAttribute($name);
        }

        return '';
    }

    /**
     * Checks if the node is empty.
     */
    public function isEmpty(): bool
    {
        return $this->isText() && preg_replace('/\s+/', '', $this->getValue()) === '';
    }

    /**
     * Gets the previous sibling from the node.
     */
    public function getPreviousSibling(): static|null
    {
        $node = $this->node;

        while ($node = $node->previousSibling) {
            $node = new static($node);

            if ($node->isEmpty()) {
                $node = $node->node;

                continue;
            }

            if (! $node->isComment()) {
                return $node;
            }

            $node = $node->node;
        }

        return is_null($node) ? null : new static($node);
    }

    /**
     * Gets the next sibling from the node.
     */
    public function getNextSibling(): static|null
    {
        $node = $this->node;

        while ($node = $node->nextSibling) {
            $node = new static($node);

            if ($node->isEmpty()) {
                $node = $node->node;

                continue;
            }

            if (! $node->isComment()) {
                return $node;
            }

            $node = $node->node;
        }

        return is_null($node) ? null : new static($node);
    }

    /**
     * Checks if the node is the first child.
     */
    public function isFirstChild(): bool
    {
        return is_null($this->getPreviousSibling());
    }

    /**
     * Gets the inner HTML representation of the node including child nodes.
     */
    public function getHtml(): string
    {
        $html = '';
        foreach ($this->node->childNodes as $child) {
            if ($child->ownerDocument instanceof \DOMDocument) {
                $html .= $child->ownerDocument->saveXML($child);
            }
        }

        return html_entity_decode($html);
    }

    /**
     * Converts the node to a string.
     */
    public function __toString(): string
    {
        if ($this->isComment()) {
            return '';
        }

        if ($this->getValue() === ' ') {
            return ' ';
        }

        if ($this->isEmpty()) {
            return '';
        }

        $text = preg_replace('/\s+/', ' ', $this->getValue()) ?? '';

        if (is_null($this->getPreviousSibling())) {
            $text = ltrim($text);
        }

        if (is_null($this->getNextSibling())) {
            $text = rtrim($text);
        }

        return $text;
    }
}

• [F] Node.php
  Delete
• [F] Style.php
  Delete
• [F] Styles.php
  Delete

Blog Section

Discover the Latest in Digital Payments and NFC Technology

Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.

The Rise of Contactless Payments:...

In recent years, contactless payments have surged in popularity, driven...

Visit Blog

March 27, 2024

Enhancing Payment Security: The Role...

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...

Visit Blog

March 27, 2024

The Future of Digital Wallets:...

Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...

Visit Blog

March 27, 2024