fix public calendars

apps/dav/lib/CalDAV/CalDavBackend.php

@@ -1648,6 +1648,23 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 		return reset($row) > 0;
 	}
 
+	/**
+	 * @param \OCA\DAV\CalDAV\Calendar $calendar
+	 * @return string
+	 */
+	public function getPublishToken($calendar) {
+		$query = $this->db->getQueryBuilder();
+		$result = $query->select('publicuri')
+			->from('dav_shares')
+			->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
+			->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
+			->execute();
+
+		$row = $result->fetch();
+		$result->closeCursor();
+		return reset($row);
+	}
+
 	/**
 	 * @param int $resourceId
 	 * @param array $acl

apps/dav/lib/CalDAV/Calendar.php

@@ -267,6 +267,10 @@ class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 		return $this->caldavBackend->getPublishStatus($this);
 	}
 
+	function getPublishToken() {
+		return $this->caldavBackend->getPublishToken($this);
+	}
+
 	private function canWrite() {
 		if (isset($this->calendarInfo['{http://owncloud.org/ns}read-only'])) {
 			return !$this->calendarInfo['{http://owncloud.org/ns}read-only'];

apps/dav/lib/CalDAV/Publishing/PublishPlugin.php

@@ -97,7 +97,7 @@ class PublishPlugin extends ServerPlugin {
 			$propFind->handle('{'.self::NS_CALENDARSERVER.'}publish-url', function () use ($node) {
 				if ($node->getPublishStatus()) {
 					// We return the publish-url only if the calendar is published.
-					$token = $node->getName();
+					$token = $node->getPublishToken();
 					$publishUrl = $this->urlGenerator->getAbsoluteURL($this->server->getBaseUri().'public-calendars/').$token;
 
 					return new Publisher($publishUrl, true);