fix deletion of calendars

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

apps/dav/lib/CalDAV/CalDavBackend.php

@@ -282,6 +282,48 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 		return array_values($calendars);
 	}
 
+	public function getUsersOwnCalendars($principalUri) {
+		$principalUri = $this->convertPrincipal($principalUri, true);
+		$fields = array_values($this->propertyMap);
+		$fields[] = 'id';
+		$fields[] = 'uri';
+		$fields[] = 'synctoken';
+		$fields[] = 'components';
+		$fields[] = 'principaluri';
+		$fields[] = 'transparent';
+		// Making fields a comma-delimited list
+		$query = $this->db->getQueryBuilder();
+		$query->select($fields)->from('calendars')
+			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+			->orderBy('calendarorder', 'ASC');
+		$stmt = $query->execute();
+		$calendars = [];
+		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+			$components = [];
+			if ($row['components']) {
+				$components = explode(',',$row['components']);
+			}
+			$calendar = [
+				'id' => $row['id'],
+				'uri' => $row['uri'],
+				'principaluri' => $this->convertPrincipal($row['principaluri'], false),
+				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+			];
+			foreach($this->propertyMap as $xmlName=>$dbName) {
+				$calendar[$xmlName] = $row[$dbName];
+			}
+			if (!isset($calendars[$calendar['id']])) {
+				$calendars[$calendar['id']] = $calendar;
+			}
+		}
+		$stmt->closeCursor();
+		return array_values($calendars);
+	}
+
+
 	private function getUserDisplayName($uid) {
 		if (!isset($this->userDisplayNames[$uid])) {
 			$user = $this->userManager->get($uid);

apps/dav/lib/HookManager.php

@@ -46,6 +46,12 @@ class HookManager {
 	/** @var CardDavBackend */
 	private $cardDav;
 
+	/** @var array */
+	private $calendarsToDelete;
+
+	/** @var array */
+	private $addressBooksToDelete;
+
 	public function __construct(IUserManager $userManager,
 								SyncService $syncService,
 								CalDavBackend $calDav,
@@ -85,7 +91,10 @@ class HookManager {
 	}
 
 	public function preDeleteUser($params) {
-		$this->usersToDelete[$params['uid']] = $this->userManager->get($params['uid']);
+		$uid = $params['uid'];
+		$this->usersToDelete[$uid] = $this->userManager->get($uid);
+		$this->calendarsToDelete = $this->calDav->getUsersOwnCalendars('principals/users/' . $uid);
+		$this->addressBooksToDelete = $this->cardDav->getAddressBooksForUser('principals/users/' . $uid);
 	}
 
 	public function postDeleteUser($params) {
@@ -94,14 +103,12 @@ class HookManager {
 			$this->syncService->deleteUser($this->usersToDelete[$uid]);
 		}
 
-		$calendarsToDelete = $this->calDav->getCalendarsForUser('principals/users/' . $uid);
-		foreach ($calendarsToDelete as $calendar) {
+		foreach ($this->calendarsToDelete as $calendar) {
 			$this->calDav->deleteCalendar($calendar['id']);
 		}
 		$this->calDav->deleteAllSharesForUser('principals/users/' . $uid);
 
-		$addressBooksToDelete = $this->cardDav->getAddressBooksForUser('principals/users/' . $uid);
-		foreach ($addressBooksToDelete as $addressBook) {
+		foreach ($this->addressBooksToDelete as $addressBook) {
 			$this->cardDav->deleteAddressBook($addressBook['id']);
 		}
 	}

apps/dav/tests/unit/DAV/HookManagerTest.php

@@ -168,7 +168,7 @@ class HookManagerTest extends TestCase {
 		$cal = $this->getMockBuilder(CalDavBackend::class)
 			->disableOriginalConstructor()
 			->getMock();
-		$cal->expects($this->once())->method('getCalendarsForUser')->willReturn([
+		$cal->expects($this->once())->method('getUsersOwnCalendars')->willReturn([
 			['id' => 'personal']
 		]);
 		$cal->expects($this->once())->method('deleteCalendar');