<?php
declare(strict_types=1);
namespace Butschster\ContextGenerator\Lib\Html;
/**
* Extracts content from HTML using CSS selectors
*/
final class SelectorContentExtractor implements SelectorContentExtractorInterface
{
public function extract(string $html, string $selector): string
{
if (empty($html)) {
return $html;
}
$dom = new \DOMDocument();
\libxml_use_internal_errors(true);
$dom->loadHTML($html, LIBXML_NOWARNING | LIBXML_NOERROR);
\libxml_clear_errors();
$xpath = new \DOMXPath($dom);
// Convert CSS selector to XPath
$xpathSelector = $this->cssToXPath($selector);
$elements = $xpath->query($xpathSelector);
if ($elements === false || $elements->length === 0) {
return '';
}
$result = '';
foreach ($elements as $element) {
$result .= $dom->saveHTML($element) . "\n";
}
return $result;
}
/**
* Very basic CSS to XPath converter (only handles simple selectors)
* In a real implementation, use a proper library for this
*/
private function cssToXPath(string $selector): string
{
// Handle ID selector (#id)
if (\str_starts_with($selector, '#')) {
return "//*[@id='" . \substr($selector, 1) . "']";
}
// Handle class selector (.class)
if (\str_starts_with($selector, '.')) {
return "//*[contains(@class, '" . \substr($selector, 1) . "')]";
}
// Handle element selector (div, p, etc.)
return "//{$selector}";
}
}
