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<?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;
}
}
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