1 files changed, 284 insertions, 0 deletions
diff --git a/apps/dav/lib/CardDAV/SyncService.php b/apps/dav/lib/CardDAV/SyncService.php
new file mode 100644
index 00000000000..c4741a01772
--- /dev/null
+++ b/apps/dav/lib/CardDAV/SyncService.php
@@ -0,0 +1,284 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Roeland Jago Douma <rullzer@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\CardDAV;
+
+use OCP\AppFramework\Http;
+use OCP\ILogger;
+use OCP\IUser;
+use OCP\IUserManager;
+use Sabre\DAV\Client;
+use Sabre\DAV\Xml\Response\MultiStatus;
+use Sabre\DAV\Xml\Service;
+use Sabre\HTTP\ClientHttpException;
+use Sabre\VObject\Reader;
+
+class SyncService {
+
+	/** @var CardDavBackend */
+	private $backend;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	/** @var ILogger */
+	private $logger;
+
+	/** @var array */
+	private $localSystemAddressBook;
+
+	public function __construct(CardDavBackend $backend, IUserManager $userManager, ILogger $logger) {
+		$this->backend = $backend;
+		$this->userManager = $userManager;
+		$this->logger = $logger;
+	}
+
+	/**
+	 * @param string $url
+	 * @param string $userName
+	 * @param string $sharedSecret
+	 * @param string $syncToken
+	 * @param int $targetBookId
+	 * @param string $targetPrincipal
+	 * @param array $targetProperties
+	 * @return string
+	 * @throws \Exception
+	 */
+	public function syncRemoteAddressBook($url, $userName, $sharedSecret, $syncToken, $targetBookId, $targetPrincipal, $targetProperties) {
+		// 1. create addressbook
+		$book = $this->ensureSystemAddressBookExists($targetPrincipal, $targetBookId, $targetProperties);
+		$addressBookId = $book['id'];
+
+		// 2. query changes
+		try {
+			$response = $this->requestSyncReport($url, $userName, $sharedSecret, $syncToken);
+		} catch (ClientHttpException $ex) {
+			if ($ex->getCode() === Http::STATUS_UNAUTHORIZED) {
+				// remote server revoked access to the address book, remove it
+				$this->backend->deleteAddressBook($addressBookId);
+				$this->logger->info('Authorization failed, remove address book: ' . $url, ['app' => 'dav']);
+				throw $ex;
+			}
+		}
+
+		// 3. apply changes
+		// TODO: use multi-get for download
+		foreach ($response['response'] as $resource => $status) {
+			$cardUri = basename($resource);
+			if (isset($status[200])) {
+				$vCard = $this->download($url, $sharedSecret, $resource);
+				$existingCard = $this->backend->getCard($addressBookId, $cardUri);
+				if ($existingCard === false) {
+					$this->backend->createCard($addressBookId, $cardUri, $vCard['body']);
+				} else {
+					$this->backend->updateCard($addressBookId, $cardUri, $vCard['body']);
+				}
+			} else {
+				$this->backend->deleteCard($addressBookId, $cardUri);
+			}
+		}
+
+		return $response['token'];
+	}
+
+	/**
+	 * @param string $principal
+	 * @param string $id
+	 * @param array $properties
+	 * @return array|null
+	 * @throws \Sabre\DAV\Exception\BadRequest
+	 */
+	public function ensureSystemAddressBookExists($principal, $id, $properties) {
+		$book = $this->backend->getAddressBooksByUri($principal, $id);
+		if (!is_null($book)) {
+			return $book;
+		}
+		$this->backend->createAddressBook($principal, $id, $properties);
+
+		return $this->backend->getAddressBooksByUri($principal, $id);
+	}
+
+	/**
+	 * @param string $url
+	 * @param string $userName
+	 * @param string $sharedSecret
+	 * @param string $syncToken
+	 * @return array
+	 */
+	protected function requestSyncReport($url, $userName, $sharedSecret, $syncToken) {
+		$settings = [
+			'baseUri' => $url . '/',
+			'userName' => $userName,
+			'password' => $sharedSecret,
+		];
+		$client = new Client($settings);
+		$client->setThrowExceptions(true);
+
+		$addressBookUrl = "remote.php/dav/addressbooks/system/system/system";
+		$body = $this->buildSyncCollectionRequestBody($syncToken);
+
+		$response = $client->request('REPORT', $addressBookUrl, $body, [
+			'Content-Type' => 'application/xml'
+		]);
+
+		$result = $this->parseMultiStatus($response['body']);
+
+		return $result;
+	}
+
+	/**
+	 * @param string $url
+	 * @param string $sharedSecret
+	 * @param string $resourcePath
+	 * @return array
+	 */
+	protected function download($url, $sharedSecret, $resourcePath) {
+		$settings = [
+			'baseUri' => $url,
+			'userName' => 'system',
+			'password' => $sharedSecret,
+		];
+		$client = new Client($settings);
+		$client->setThrowExceptions(true);
+
+		$response = $client->request('GET', $resourcePath);
+		return $response;
+	}
+
+	/**
+	 * @param string|null $syncToken
+	 * @return string
+	 */
+	private function buildSyncCollectionRequestBody($syncToken) {
+
+		$dom = new \DOMDocument('1.0', 'UTF-8');
+		$dom->formatOutput = true;
+		$root = $dom->createElementNS('DAV:', 'd:sync-collection');
+		$sync = $dom->createElement('d:sync-token', $syncToken);
+		$prop = $dom->createElement('d:prop');
+		$cont = $dom->createElement('d:getcontenttype');
+		$etag = $dom->createElement('d:getetag');
+
+		$prop->appendChild($cont);
+		$prop->appendChild($etag);
+		$root->appendChild($sync);
+		$root->appendChild($prop);
+		$dom->appendChild($root);
+		$body = $dom->saveXML();
+
+		return $body;
+	}
+
+	/**
+	 * @param string $body
+	 * @return array
+	 * @throws \Sabre\Xml\ParseException
+	 */
+	private function parseMultiStatus($body) {
+		$xml = new Service();
+
+		/** @var MultiStatus $multiStatus */
+		$multiStatus = $xml->expect('{DAV:}multistatus', $body);
+
+		$result = [];
+		foreach ($multiStatus->getResponses() as $response) {
+			$result[$response->getHref()] = $response->getResponseProperties();
+		}
+
+		return ['response' => $result, 'token' => $multiStatus->getSyncToken()];
+	}
+
+	/**
+	 * @param IUser $user
+	 */
+	public function updateUser($user) {
+		$systemAddressBook = $this->getLocalSystemAddressBook();
+		$addressBookId = $systemAddressBook['id'];
+		$converter = new Converter();
+		$name = $user->getBackendClassName();
+		$userId = $user->getUID();
+
+		$cardId = "$name:$userId.vcf";
+		$card = $this->backend->getCard($addressBookId, $cardId);
+		if ($card === false) {
+			$vCard = $converter->createCardFromUser($user);
+			$this->backend->createCard($addressBookId, $cardId, $vCard->serialize());
+		} else {
+			$vCard = Reader::read($card['carddata']);
+			if ($converter->updateCard($vCard, $user)) {
+				$this->backend->updateCard($addressBookId, $cardId, $vCard->serialize());
+			}
+		}
+	}
+
+	/**
+	 * @param IUser|string $userOrCardId
+	 */
+	public function deleteUser($userOrCardId) {
+		$systemAddressBook = $this->getLocalSystemAddressBook();
+		if ($userOrCardId instanceof IUser){
+			$name = $userOrCardId->getBackendClassName();
+			$userId = $userOrCardId->getUID();
+
+			$userOrCardId = "$name:$userId.vcf";
+		}
+		$this->backend->deleteCard($systemAddressBook['id'], $userOrCardId);
+	}
+
+	/**
+	 * @return array|null
+	 */
+	public function getLocalSystemAddressBook() {
+		if (is_null($this->localSystemAddressBook)) {
+			$systemPrincipal = "principals/system/system";
+			$this->localSystemAddressBook = $this->ensureSystemAddressBookExists($systemPrincipal, 'system', [
+				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => 'System addressbook which holds all users of this instance'
+			]);
+		}
+
+		return $this->localSystemAddressBook;
+	}
+
+	public function syncInstance(\Closure $progressCallback = null) {
+		$systemAddressBook = $this->getLocalSystemAddressBook();
+		$this->userManager->callForAllUsers(function($user) use ($systemAddressBook, $progressCallback) {
+			$this->updateUser($user);
+			if (!is_null($progressCallback)) {
+				$progressCallback();
+			}
+		});
+
+		// remove no longer existing
+		$allCards = $this->backend->getCards($systemAddressBook['id']);
+		foreach($allCards as $card) {
+			$vCard = Reader::read($card['carddata']);
+			$uid = $vCard->UID->getValue();
+			// load backend and see if user exists
+			if (!$this->userManager->userExists($uid)) {
+				$this->deleteUser($card['uri']);
+			}
+		}
+	}
+
+
+}