125 lines
4.2 KiB
PHP
125 lines
4.2 KiB
PHP
<?php declare(strict_types=1);
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namespace Lewisdale\Webmentions;
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use League\Uri\Exceptions\SyntaxError;
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use Lewisdale\Webmentions\Exceptions\InvalidTargetException;
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use Lewisdale\Webmentions\Exceptions\InvalidUrlException;
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use Lewisdale\Webmentions\Gateways\WebmentionGatewayInterface;
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use Lewisdale\Webmentions\Models\Webmention;
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use Symfony\Component\HttpClient\HttpClient;
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use League\Uri\Uri;
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use Lewisdale\Webmentions\Exceptions\SourceNotFoundException;
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use Lewisdale\Webmentions\Exceptions\TargetNotMentionedException;
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use Lewisdale\Webmentions\Models\MentionType;
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use Symfony\Component\DomCrawler\Crawler;
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use Symfony\Contracts\HttpClient\HttpClientInterface;
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class Endpoint {
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function __construct(
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private readonly HttpClientInterface $httpClient,
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private readonly WebmentionGatewayInterface $gateway
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)
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{}
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public function validateUrl(string $url) : bool {
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try {
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$uri = Uri::createFromString($url);
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$scheme = $uri->getScheme();
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$schemeValid = in_array($scheme, ["http", "https"]);
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return $schemeValid && !!filter_var($url, FILTER_VALIDATE_URL);
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} catch (SyntaxError $e)
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{
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return false;
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}
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}
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public function receiveWebmention(string $source, string $target) : void
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{
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// Validate that both source and target are actual domains
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if (!$this->validateUrl($source) || !$this->validateUrl($target))
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{
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throw new InvalidUrlException();
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}
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// Validate that the webmention target is a domain I care about
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if (!str_contains($target, "https://lewisdale.dev")) {
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throw new InvalidTargetException();
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}
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// Parse content from the source
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$response = $this->httpClient->request('GET', $source);
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if ($response->getStatusCode() < 400)
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{
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$document = new Crawler($response->getContent());
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if (!$this->hasMention($target, $document))
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{
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throw new TargetNotMentionedException();
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}
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$container = $this->getContainer($target, $document);
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$type = $this->parseMentionType($target, $container);
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$content = $this->parseContent($target, $container, $type);
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$author = $this->parseAuthor($container);
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$webmention = new Webmention(null, $target, $source, $type, null, $author);
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$this->gateway->save($webmention);
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} else {
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throw new SourceNotFoundException();
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}
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}
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private function hasMention(string $target, Crawler $document) : bool
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{
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return $document->filter('a[href="' . $target . '"]')->count() > 0;
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}
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private function getContainer(string $target, Crawler $document) : Crawler
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{
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return $document->filter('a[href="' . $target . '"]')->closest('.h-entry') ?? $document;
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}
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private function parseMentionType(string $target, Crawler $document) : MentionType
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{
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$class = $document->filter('a[href="'. $target . '"]')->attr('class');
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if (str_contains($class, "u-like-of")) {
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return MentionType::Like;
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} else if (str_contains($class, "u-in-reply-to")) {
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return MentionType::Reply;
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} else if (str_contains($class, "u-repost-of")) {
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return MentionType::Repost;
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}
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return MentionType::Mention;
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}
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private function parseContent(string $target, Crawler $document, MentionType $type) : ?string
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{
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return match ($type) {
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MentionType::Like => "Liked this post",
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MentionType::Reply => $document->innerText(),
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MentionType::Repost => "Reposted this post",
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MentionType::Mention => $document->innerText(),
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};
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}
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private function parseAuthor(Crawler $document) : ?string
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{
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$card = $document->filter('.p-author.h-card')->eq(0);
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if ($card->count())
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{
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$name = $card->filter('.p-name')?->text("");
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$url = $card->filter('.u-url')?->text("");
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$photo = $card->filter('.u-photo')->count() ? $card->filter('.u-photo')->attr('src') : "";
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return implode(", ", [$name, $url, $photo]);
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}
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return null;
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}
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} |