110 lines
3.4 KiB
PHP
110 lines
3.4 KiB
PHP
<?php
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namespace NoccyLabs\Mercureact\Http\Middleware;
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use NoccyLabs\Mercureact\Broker\TopicManager;
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use NoccyLabs\Mercureact\Configuration;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Http\Message\ServerRequestInterface;
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use React\Http\Message\Response;
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use React\Promise\Promise;
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use React\Promise\PromiseInterface;
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class ApiHandler
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{
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public static string $indexPage;
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public function __construct(
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private Configuration $config,
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private TopicManager $topicManager
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)
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{
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}
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/**
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*
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*
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* @param ServerRequestInterface $request
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* @param callable $next
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* @return PromiseInterface
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*/
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public function __invoke(ServerRequestInterface $request, callable $next): PromiseInterface
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{
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return new Promise(
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function (callable $resolve, callable $reject) use ($next, $request) {
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$path = $request->getUri()->getPath();
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if ($path === "/index.html") {
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$resolve(Response::html(self::$indexPage));
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}
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switch (true) {
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case preg_match('<^/.well-known/mercure/subscriptions(/.+?)$>', $path, $m):
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$query = explode("/", trim($m[1]??null, "/"));
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$topic = array_shift($query);
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$subscription = array_shift($query);
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$resolve($this->apiGetSubscriptions($topic, $subscription));
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return;
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case preg_match('<^/.well-known/mercureact/status$>', $path):
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$resolve([
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'server' => 'Mercureact/1.0',
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'topics' => $this->topicManager->getTopicCount(),
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'subscriptions' => $this->topicManager->getSubscriberCount(),
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'memoryPeak' => memory_get_peak_usage(true),
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'memoryUsage' => memory_get_usage(true)
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]);
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return;
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case preg_match('<^/.well-known/mercureact/status$>', $path):
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$resolve([ 'version' => '1.0' ]);
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return;
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}
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$resolve($next($request));
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}
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);
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}
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/**
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*
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*
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* @return ResponseInterface
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*/
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private function apiGetSubscriptions(string|null $topic, string|null $subscription): ResponseInterface
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{
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// TODO implement once we can enumerate topics and subscriptions
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// mock data
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$lastEventId = "urn:uuid:5e94c686-2c0b-4f9b-958c-92ccc3bbb4eb";
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$data = [
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"@context" => "https://mercure.rocks/",
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"id" => "/.well-known/mercure/subscriptions",
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"type" => "Subscriptions",
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"lastEventID" => $lastEventId,
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"subscriptions" => []
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];
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return Response::json($data)
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->withHeader('Content-Type', 'application/ld+json')
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->withHeader('ETag', $lastEventId);
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}
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}
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ApiHandler::$indexPage = <<<ENDHTML
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<html>
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<head>
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<meta http-equiv="Content-Security-Policy" content="default-src 'self' http: 'unsafe-eval' 'unsafe-inline'; style-src 'self';">
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</head>
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<body>
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<script type="text/javascript">
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const events = new EventSource("http://127.0.0.1:9000/.well-known/mercure?topic=https://example.com/books/1");
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events.onmessage = msg => console.log(msg);
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</script>
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</body>
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</html>
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ENDHTML;
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