1 files changed, 144 insertions, 0 deletions
diff --git a/lib/private/Updater/VersionCheck.php b/lib/private/Updater/VersionCheck.php
new file mode 100644
index 00000000000..be410b06c3e
--- /dev/null
+++ b/lib/private/Updater/VersionCheck.php
@@ -0,0 +1,144 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OC\Updater;
+
+use OCP\Http\Client\IClientService;
+use OCP\IAppConfig;
+use OCP\IConfig;
+use OCP\IUserManager;
+use OCP\ServerVersion;
+use OCP\Support\Subscription\IRegistry;
+use OCP\Util;
+use Psr\Log\LoggerInterface;
+
+class VersionCheck {
+	public function __construct(
+		private ServerVersion $serverVersion,
+		private IClientService $clientService,
+		private IConfig $config,
+		private IAppConfig $appConfig,
+		private IUserManager $userManager,
+		private IRegistry $registry,
+		private LoggerInterface $logger,
+	) {
+	}
+
+
+	/**
+	 * Check if a new version is available
+	 *
+	 * @return array|bool
+	 */
+	public function check() {
+		// If this server is set to have no internet connection this is all not needed
+		if (!$this->config->getSystemValueBool('has_internet_connection', true)) {
+			return false;
+		}
+
+		// Look up the cache - it is invalidated all 30 minutes
+		if (($this->appConfig->getValueInt('core', 'lastupdatedat') + 1800) > time()) {
+			return json_decode($this->config->getAppValue('core', 'lastupdateResult'), true);
+		}
+
+		$updaterUrl = $this->config->getSystemValueString('updater.server.url', 'https://updates.nextcloud.com/updater_server/');
+
+		$this->appConfig->setValueInt('core', 'lastupdatedat', time());
+
+		if ($this->config->getAppValue('core', 'installedat', '') === '') {
+			$this->config->setAppValue('core', 'installedat', (string)microtime(true));
+		}
+
+		$version = Util::getVersion();
+		$version['installed'] = $this->config->getAppValue('core', 'installedat');
+		$version['updated'] = $this->appConfig->getValueInt('core', 'lastupdatedat');
+		$version['updatechannel'] = $this->serverVersion->getChannel();
+		$version['edition'] = '';
+		$version['build'] = $this->serverVersion->getBuild();
+		$version['php_major'] = PHP_MAJOR_VERSION;
+		$version['php_minor'] = PHP_MINOR_VERSION;
+		$version['php_release'] = PHP_RELEASE_VERSION;
+		$version['category'] = $this->computeCategory();
+		$version['isSubscriber'] = (int)$this->registry->delegateHasValidSubscription();
+		$versionString = implode('x', $version);
+
+		//fetch xml data from updater
+		$url = $updaterUrl . '?version=' . $versionString;
+
+		$tmp = [];
+		try {
+			$xml = $this->getUrlContent($url);
+		} catch (\Exception $e) {
+			$this->logger->info('Version could not be fetched from updater server: ' . $url, ['exception' => $e]);
+
+			return false;
+		}
+
+		if ($xml) {
+			if (\LIBXML_VERSION < 20900) {
+				$loadEntities = libxml_disable_entity_loader(true);
+				$data = @simplexml_load_string($xml);
+				libxml_disable_entity_loader($loadEntities);
+			} else {
+				$data = @simplexml_load_string($xml);
+			}
+			if ($data !== false) {
+				$tmp['version'] = (string)$data->version;
+				$tmp['versionstring'] = (string)$data->versionstring;
+				$tmp['url'] = (string)$data->url;
+				$tmp['web'] = (string)$data->web;
+				$tmp['changes'] = isset($data->changes) ? (string)$data->changes : '';
+				$tmp['autoupdater'] = (string)$data->autoupdater;
+				$tmp['eol'] = isset($data->eol) ? (string)$data->eol : '0';
+			} else {
+				libxml_clear_errors();
+			}
+		}
+
+		// Cache the result
+		$this->config->setAppValue('core', 'lastupdateResult', json_encode($tmp));
+		return $tmp;
+	}
+
+	/**
+	 * @throws \Exception
+	 */
+	protected function getUrlContent(string $url): string {
+		$response = $this->clientService->newClient()->get($url, [
+			'timeout' => 5,
+		]);
+
+		$content = $response->getBody();
+
+		// IResponse.getBody responds with null|resource if returning a stream response was requested.
+		// As that's not the case here, we can just ignore the psalm warning by adding an assertion.
+		assert(is_string($content));
+
+		return $content;
+	}
+
+	private function computeCategory(): int {
+		$categoryBoundaries = [
+			100,
+			500,
+			1000,
+			5000,
+			10000,
+			100000,
+			1000000,
+		];
+
+		$nbUsers = $this->userManager->countSeenUsers();
+		foreach ($categoryBoundaries as $categoryId => $boundary) {
+			if ($nbUsers <= $boundary) {
+				return $categoryId;
+			}
+		}
+
+		return count($categoryBoundaries);
+	}
+}