48 lines
1.4 KiB
PHP
48 lines
1.4 KiB
PHP
<?php
|
|
|
|
namespace App\MetadataResolver;
|
|
|
|
class OGPResolver implements Resolver
|
|
{
|
|
public function resolve(string $url): Metadata
|
|
{
|
|
$client = new \GuzzleHttp\Client();
|
|
$res = $client->get($url);
|
|
if ($res->getStatusCode() === 200) {
|
|
return $this->parse($res->getBody());
|
|
} else {
|
|
throw new \RuntimeException("{$res->getStatusCode()}: $url");
|
|
}
|
|
}
|
|
|
|
public function parse(string $html): Metadata
|
|
{
|
|
$dom = new \DOMDocument();
|
|
@$dom->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
|
|
$xpath = new \DOMXPath($dom);
|
|
|
|
$metadata = new Metadata();
|
|
|
|
$metadata->title = $this->findContent($xpath, '//meta[@*="og:title"]', '//meta[@*="twitter:title"]');
|
|
$metadata->description = $this->findContent($xpath, '//meta[@*="og:description"]', '//meta[@*="twitter:description"]');
|
|
$metadata->image = $this->findContent($xpath, '//meta[@*="og:image"]', '//meta[@*="twitter:image"]');
|
|
|
|
return $metadata;
|
|
}
|
|
|
|
private function findContent(\DOMXPath $xpath, string ...$expressions)
|
|
{
|
|
foreach ($expressions as $expression) {
|
|
$nodes = $xpath->query($expression);
|
|
foreach ($nodes as $node) {
|
|
$content = $node->getAttribute('content');
|
|
if (!empty($content)) {
|
|
return $content;
|
|
}
|
|
}
|
|
}
|
|
|
|
return '';
|
|
}
|
|
}
|