Merge pull request #11886 from nextcloud/feature/noid/principal_search_displayname

Principal property search for users and groups with {DAV:}display name

apps/dav/lib/CalDAV/ResourceBooking/AbstractPrincipalBackend.php

@@ -50,6 +50,9 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 	/** @var string */
 	private $dbTableName;
 
+	/** @var string */
+	private $cuType;
+
 	/**
 	 * @param IDBConnection $dbConnection
 	 * @param IUserSession $userSession
@@ -57,18 +60,22 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 	 * @param ILogger $logger
 	 * @param string $principalPrefix
 	 * @param string $dbPrefix
+	 * @param string $cuType
 	 */
 	public function __construct(IDBConnection $dbConnection,
 								IUserSession $userSession,
 								IGroupManager $groupManager,
 								ILogger $logger,
-								$principalPrefix, $dbPrefix) {
+								string $principalPrefix,
+								string $dbPrefix,
+								string $cuType) {
 		$this->db = $dbConnection;
 		$this->userSession = $userSession;
 		$this->groupManager = $groupManager;
 		$this->logger = $logger;
 		$this->principalPrefix = $principalPrefix;
 		$this->dbTableName = 'calendar_' . $dbPrefix;
+		$this->cuType = $cuType;
 	}
 
 	/**
@@ -328,7 +335,8 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 		return [
 			'uri' => $this->principalPrefix . '/' . $row['backend_id'] . '-' . $row['resource_id'],
 			'{DAV:}displayname' => $row['displayname'],
-			'{http://sabredav.org/ns}email-address' => $row['email']
+			'{http://sabredav.org/ns}email-address' => $row['email'],
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => $this->cuType,
 		];
 	}
 

apps/dav/lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php

@@ -40,6 +40,6 @@ class ResourcePrincipalBackend extends AbstractPrincipalBackend {
 								IGroupManager $groupManager,
 								ILogger $logger) {
 		parent::__construct($dbConnection, $userSession, $groupManager, $logger,
-			'principals/calendar-resources', 'resources');
+			'principals/calendar-resources', 'resources', 'RESOURCE');
 	}
 }

apps/dav/lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php

@@ -40,6 +40,6 @@ class RoomPrincipalBackend extends AbstractPrincipalBackend {
 								IGroupManager $groupManager,
 								ILogger $logger) {
 		parent::__construct($dbConnection, $userSession, $groupManager, $logger,
-			'principals/calendar-rooms', 'rooms');
+			'principals/calendar-rooms', 'rooms', 'ROOM');
 	}
 }

apps/dav/lib/CalDAV/Schedule/Plugin.php

@@ -49,6 +49,31 @@ class Plugin extends \Sabre\CalDAV\Schedule\Plugin {
 		$server->on('propFind', [$this, 'propFindDefaultCalendarUrl'], 90);
 	}
 
+	/**
+	 * This method handler is invoked during fetching of properties.
+	 *
+	 * We use this event to add calendar-auto-schedule-specific properties.
+	 *
+	 * @param PropFind $propFind
+	 * @param INode $node
+	 * @return void
+	 */
+	function propFind(PropFind $propFind, INode $node) {
+		// overwrite Sabre/Dav's implementation
+		$propFind->handle('{' . self::NS_CALDAV . '}calendar-user-type', function() use ($node) {
+			$calendarUserType = '{' . self::NS_CALDAV . '}calendar-user-type';
+			$props = $node->getProperties([$calendarUserType]);
+
+			if (isset($props[$calendarUserType])) {
+				return $props[$calendarUserType];
+			}
+
+			return 'INDIVIDUAL';
+		});
+
+		parent::propFind($propFind, $node);
+	}
+
 	/**
 	 * Returns a list of addresses that are associated with a principal.
 	 *

apps/dav/lib/Connector/Sabre/Principal.php

@@ -1,6 +1,7 @@
 <?php
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @copyright Copyright (c) 2018, Georg Ehrke
  *
  * @author Bart Visscher <bartv@thisnet.nl>
  * @author Jakob Sack <mail@jakobsack.de>
@@ -11,6 +12,7 @@
  * @author Thomas Müller <thomas.mueller@tmit.eu>
  * @author Thomas Tanghus <thomas@tanghus.net>
  * @author Vincent Petry <pvince81@owncloud.com>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
  *
  * @license AGPL-3.0
  *
@@ -249,6 +251,23 @@ class Principal implements BackendInterface {
 					}, []);
 					break;
 
+				case '{DAV:}displayname':
+					$users = $this->userManager->searchDisplayName($value);
+
+					$results[] = array_reduce($users, function(array $carry, IUser $user) use ($restrictGroups) {
+						// is sharing restricted to groups only?
+						if ($restrictGroups !== false) {
+							$userGroups = $this->groupManager->getUserGroupIds($user);
+							if (count(array_intersect($userGroups, $restrictGroups)) === 0) {
+								return $carry;
+							}
+						}
+
+						$carry[] = $this->principalPrefix . '/' . $user->getUID();
+						return $carry;
+					}, []);
+					break;
+
 				default:
 					$results[] = [];
 					break;
@@ -263,11 +282,11 @@ class Principal implements BackendInterface {
 
 		switch ($test) {
 			case 'anyof':
-				return array_unique(array_merge(...$results));
+				return array_values(array_unique(array_merge(...$results)));
 
 			case 'allof':
 			default:
-				return array_intersect(...$results);
+				return array_values(array_intersect(...$results));
 		}
 	}
 
@@ -354,6 +373,7 @@ class Principal implements BackendInterface {
 		$principal = [
 				'uri' => $this->principalPrefix . '/' . $userId,
 				'{DAV:}displayname' => is_null($displayName) ? $userId : $displayName,
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'INDIVIDUAL',
 		];
 
 		$email = $user->getEMailAddress();

apps/dav/lib/DAV/GroupPrincipalBackend.php

@@ -1,9 +1,11 @@
 <?php
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @copyright Copyright (c) 2018, Georg Ehrke
  *
  * @author Roeland Jago Douma <roeland@famdouma.nl>
  * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
  *
  * @license AGPL-3.0
  *
@@ -24,6 +26,9 @@ namespace OCA\DAV\DAV;
 
 use OCP\IGroup;
 use OCP\IGroupManager;
+use OCP\IUserSession;
+use OCP\Share\IManager as IShareManager;
+use OCP\IL10N;
 use OCP\IUser;
 use Sabre\DAV\Exception;
 use \Sabre\DAV\PropPatch;
@@ -36,11 +41,29 @@ class GroupPrincipalBackend implements BackendInterface {
 	/** @var IGroupManager */
 	private $groupManager;
 
+	/** @var IUserSession */
+	private $userSession;
+
+	/** @var IShareManager */
+	private $shareManager;
+
+	/** @var IL10N */
+	private $l10n;
+
 	/**
 	 * @param IGroupManager $IGroupManager
+	 * @param IUserSession $userSession
+	 * @param IShareManager $shareManager
+	 * @param IL10N $l10n
 	 */
-	public function __construct(IGroupManager $IGroupManager) {
+	public function __construct(IGroupManager $IGroupManager,
+								IUserSession $userSession,
+								IShareManager $shareManager,
+								IL10N $l10n) {
 		$this->groupManager = $IGroupManager;
+		$this->userSession = $userSession;
+		$this->shareManager = $shareManager;
+		$this->l10n = $l10n;
 	}
 
 	/**
@@ -161,7 +184,71 @@ class GroupPrincipalBackend implements BackendInterface {
 	 * @return array
 	 */
 	function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof') {
-		return [];
+		$results = [];
+
+		if (\count($searchProperties) === 0) {
+			return [];
+		}
+		if ($prefixPath !== self::PRINCIPAL_PREFIX) {
+			return [];
+		}
+		// If sharing is disabled, return the empty array
+		$shareAPIEnabled = $this->shareManager->shareApiEnabled();
+		if (!$shareAPIEnabled) {
+			return [];
+		}
+
+		// If sharing is restricted to group members only,
+		// return only members that have groups in common
+		$restrictGroups = false;
+		if ($this->shareManager->shareWithGroupMembersOnly()) {
+			$user = $this->userSession->getUser();
+			if (!$user) {
+				return [];
+			}
+
+			$restrictGroups = $this->groupManager->getUserGroupIds($user);
+		}
+
+		foreach ($searchProperties as $prop => $value) {
+			switch ($prop) {
+				case '{DAV:}displayname':
+					$groups = $this->groupManager->search($value);
+
+					$results[] = array_reduce($groups, function(array $carry, IGroup $group) use ($restrictGroups) {
+						$gid = $group->getGID();
+						// is sharing restricted to groups only?
+						if ($restrictGroups !== false) {
+							if (!\in_array($gid, $restrictGroups, true)) {
+								return $carry;
+							}
+						}
+
+						$carry[] = self::PRINCIPAL_PREFIX . '/' . $gid;
+						return $carry;
+					}, []);
+					break;
+
+				default:
+					$results[] = [];
+					break;
+			}
+		}
+
+		// results is an array of arrays, so this is not the first search result
+		// but the results of the first searchProperty
+		if (count($results) === 1) {
+			return $results[0];
+		}
+
+		switch ($test) {
+			case 'anyof':
+				return array_values(array_unique(array_merge(...$results)));
+
+			case 'allof':
+			default:
+				return array_values(array_intersect(...$results));
+		}
 	}
 
 	/**
@@ -170,7 +257,34 @@ class GroupPrincipalBackend implements BackendInterface {
 	 * @return string
 	 */
 	function findByUri($uri, $principalPrefix) {
-		return '';
+		// If sharing is disabled, return the empty array
+		$shareAPIEnabled = $this->shareManager->shareApiEnabled();
+		if (!$shareAPIEnabled) {
+			return null;
+		}
+
+		// If sharing is restricted to group members only,
+		// return only members that have groups in common
+		$restrictGroups = false;
+		if ($this->shareManager->shareWithGroupMembersOnly()) {
+			$user = $this->userSession->getUser();
+			if (!$user) {
+				return null;
+			}
+
+			$restrictGroups = $this->groupManager->getUserGroupIds($user);
+		}
+
+		if (strpos($uri, 'principal:principals/groups/') === 0) {
+			$name = urlencode(substr($uri, 28));
+			if ($restrictGroups !== false && !\in_array($name, $restrictGroups, true)) {
+				return null;
+			}
+
+			return substr($uri, 10);
+		}
+
+		return null;
 	}
 
 	/**
@@ -179,12 +293,12 @@ class GroupPrincipalBackend implements BackendInterface {
 	 */
 	protected function groupToPrincipal($group) {
 		$groupId = $group->getGID();
-		$principal = [
-			'uri' => 'principals/groups/' . urlencode($groupId),
-			'{DAV:}displayname' => $groupId,
-		];
 
-		return $principal;
+		return [
+			'uri' => 'principals/groups/' . urlencode($groupId),
+			'{DAV:}displayname' => $this->l10n->t('%s (group)', [$groupId]),
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
+		];
 	}
 
 	/**
@@ -192,11 +306,20 @@ class GroupPrincipalBackend implements BackendInterface {
 	 * @return array
 	 */
 	protected function userToPrincipal($user) {
+		$userId = $user->getUID();
+		$displayName = $user->getDisplayName();
+
 		$principal = [
-			'uri' => 'principals/users/' . $user->getUID(),
-			'{DAV:}displayname' => $user->getDisplayName(),
+			'uri' => 'principals/users/' . $userId,
+			'{DAV:}displayname' => is_null($displayName) ? $userId : $displayName,
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'INDIVIDUAL',
 		];
 
+		$email = $user->getEMailAddress();
+		if (!empty($email)) {
+			$principal['{http://sabredav.org/ns}email-address'] = $email;
+		}
+
 		return $principal;
 	}
 }

apps/dav/lib/RootCollection.php

@@ -57,7 +57,7 @@ class RootCollection extends SimpleCollection {
 			\OC::$server->getUserSession(),
 			$config
 		);
-		$groupPrincipalBackend = new GroupPrincipalBackend($groupManager);
+		$groupPrincipalBackend = new GroupPrincipalBackend($groupManager, $userSession, $shareManager, $l10n);
 		$calendarResourcePrincipalBackend = new ResourcePrincipalBackend($db, $userSession, $groupManager, $logger);
 		$calendarRoomPrincipalBackend = new RoomPrincipalBackend($db, $userSession, $groupManager, $logger);
 		// as soon as debug mode is enabled we allow listing of principals

apps/dav/tests/unit/CalDAV/ResourceBooking/AbstractPrincipalBackendTest.php

@@ -53,6 +53,9 @@ abstract class AbstractPrincipalBackendTest extends TestCase {
 	/** @var string */
 	protected $principalPrefix;
 
+	/** @var string */
+	protected $expectedCUType;
+
 	public function setUp() {
 		parent::setUp();
 
@@ -127,16 +130,19 @@ abstract class AbstractPrincipalBackendTest extends TestCase {
 				'uri' => $this->principalPrefix . '/db-123',
 				'{DAV:}displayname' => 'Resource 123',
 				'{http://sabredav.org/ns}email-address' => 'foo@bar.com',
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => $this->expectedCUType,
 			],
 			[
 				'uri' => $this->principalPrefix . '/ldap-123',
 				'{DAV:}displayname' => 'Resource 123 ldap',
 				'{http://sabredav.org/ns}email-address' => 'ldap@bar.com',
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => $this->expectedCUType,
 			],
 			[
 				'uri' => $this->principalPrefix . '/db-456',
 				'{DAV:}displayname' => 'Resource 456',
 				'{http://sabredav.org/ns}email-address' => 'bli@bar.com',
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => $this->expectedCUType,
 			],
 		], $actual);
 
@@ -209,6 +215,7 @@ abstract class AbstractPrincipalBackendTest extends TestCase {
 			'uri' => $this->principalPrefix . '/db-123',
 			'{DAV:}displayname' => 'Resource 123',
 			'{http://sabredav.org/ns}email-address' => 'foo@bar.com',
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => $this->expectedCUType,
 		], $actual);
 	}
 

apps/dav/tests/unit/CalDAV/ResourceBooking/ResourcePrincipalBackendTest.php

@@ -31,5 +31,6 @@ Class ResourcePrincipalBackendTest extends AbstractPrincipalBackendTest {
 			$this->userSession, $this->groupManager, $this->logger);
 		$this->expectedDbTable = 'calendar_resources';
 		$this->principalPrefix = 'principals/calendar-resources';
+		$this->expectedCUType = 'RESOURCE';
 	}
 }

apps/dav/tests/unit/CalDAV/ResourceBooking/RoomPrincipalBackendTest.php

@@ -31,5 +31,6 @@ Class RoomPrincipalBackendTest extends AbstractPrincipalBackendTest {
 			$this->userSession, $this->groupManager, $this->logger);
 		$this->expectedDbTable = 'calendar_rooms';
 		$this->principalPrefix = 'principals/calendar-rooms';
+		$this->expectedCUType = 'ROOM';
 	}
 }

apps/dav/tests/unit/Connector/Sabre/PrincipalTest.php

@@ -1,12 +1,14 @@
 <?php
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @copyright Copyright (c) 2018, Georg Ehrke
  *
  * @author Joas Schilling <coding@schilljs.com>
  * @author Lukas Reschke <lukas@statuscode.ch>
  * @author Roeland Jago Douma <roeland@famdouma.nl>
  * @author Thomas Müller <thomas.mueller@tmit.eu>
  * @author Vincent Petry <pvince81@owncloud.com>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
  *
  * @license AGPL-3.0
  *
@@ -38,16 +40,22 @@ use OCP\IUserManager;
 use Test\TestCase;
 
 class PrincipalTest extends TestCase {
+
 	/** @var IUserManager | \PHPUnit_Framework_MockObject_MockObject */
 	private $userManager;
+
 	/** @var \OCA\DAV\Connector\Sabre\Principal */
 	private $connector;
+
 	/** @var IGroupManager | \PHPUnit_Framework_MockObject_MockObject */
 	private $groupManager;
+
 	/** @var IManager | \PHPUnit_Framework_MockObject_MockObject */
 	private $shareManager;
+
 	/** @var IUserSession | \PHPUnit_Framework_MockObject_MockObject */
 	private $userSession;
+
 	/** @var IConfig | \PHPUnit_Framework_MockObject_MockObject  */
 	private $config;
 
@@ -94,7 +102,7 @@ class PrincipalTest extends TestCase {
 		$barUser
 				->expects($this->exactly(1))
 				->method('getEMailAddress')
-				->will($this->returnValue('bar@owncloud.org'));
+				->will($this->returnValue('bar@nextcloud.com'));
 		$this->userManager
 			->expects($this->once())
 			->method('search')
@@ -104,12 +112,14 @@ class PrincipalTest extends TestCase {
 		$expectedResponse = [
 			0 => [
 				'uri' => 'principals/users/foo',
-				'{DAV:}displayname' => 'Dr. Foo-Bar'
+				'{DAV:}displayname' => 'Dr. Foo-Bar',
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'INDIVIDUAL',
 			],
 			1 => [
 				'uri' => 'principals/users/bar',
 				'{DAV:}displayname' => 'bar',
-				'{http://sabredav.org/ns}email-address' => 'bar@owncloud.org'
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'INDIVIDUAL',
+				'{http://sabredav.org/ns}email-address' => 'bar@nextcloud.com',
 			]
 		];
 		$response = $this->connector->getPrincipalsByPrefix('principals/users');
@@ -141,7 +151,8 @@ class PrincipalTest extends TestCase {
 
 		$expectedResponse = [
 			'uri' => 'principals/users/foo',
-			'{DAV:}displayname' => 'foo'
+			'{DAV:}displayname' => 'foo',
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'INDIVIDUAL',
 		];
 		$response = $this->connector->getPrincipalByPath('principals/users/foo');
 		$this->assertSame($expectedResponse, $response);
@@ -152,7 +163,7 @@ class PrincipalTest extends TestCase {
 		$fooUser
 				->expects($this->exactly(1))
 				->method('getEMailAddress')
-				->will($this->returnValue('foo@owncloud.org'));
+				->will($this->returnValue('foo@nextcloud.com'));
 		$fooUser
 				->expects($this->exactly(1))
 				->method('getUID')
@@ -166,7 +177,8 @@ class PrincipalTest extends TestCase {
 		$expectedResponse = [
 			'uri' => 'principals/users/foo',
 			'{DAV:}displayname' => 'foo',
-			'{http://sabredav.org/ns}email-address' => 'foo@owncloud.org'
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'INDIVIDUAL',
+			'{http://sabredav.org/ns}email-address' => 'foo@nextcloud.com',
 		];
 		$response = $this->connector->getPrincipalByPath('principals/users/foo');
 		$this->assertSame($expectedResponse, $response);
@@ -283,7 +295,7 @@ class PrincipalTest extends TestCase {
 	/**
 	 * @dataProvider searchPrincipalsDataProvider
 	 */
-	public function testSearchPrincipals($sharingEnabled, $groupsOnly, $result) {
+	public function testSearchPrincipals($sharingEnabled, $groupsOnly, $test, $result) {
 		$this->shareManager->expects($this->once())
 			->method('shareAPIEnabled')
 			->will($this->returnValue($sharingEnabled));
@@ -302,7 +314,7 @@ class PrincipalTest extends TestCase {
 				$this->groupManager->expects($this->at(0))
 					->method('getUserGroupIds')
 					->with($user)
-					->will($this->returnValue(['group1', 'group2']));
+					->will($this->returnValue(['group1', 'group2', 'group5']));
 			}
 		} else {
 			$this->shareManager->expects($this->never())
@@ -315,15 +327,25 @@ class PrincipalTest extends TestCase {
 		$user2->method('getUID')->will($this->returnValue('user2'));
 		$user3 = $this->createMock(IUser::class);
 		$user3->method('getUID')->will($this->returnValue('user3'));
+		$user4 = $this->createMock(IUser::class);
+		$user4->method('getUID')->will($this->returnValue('user4'));
 
 		if ($sharingEnabled) {
 			$this->userManager->expects($this->at(0))
 				->method('getByEmail')
-				->with('user')
+				->with('user@example.com')
 				->will($this->returnValue([$user2, $user3]));
+
+			$this->userManager->expects($this->at(1))
+				->method('searchDisplayName')
+				->with('User 12')
+				->will($this->returnValue([$user3, $user4]));
 		} else {
 			$this->userManager->expects($this->never())
 				->method('getByEmail');
+
+			$this->userManager->expects($this->never())
+				->method('searchDisplayName');
 		}
 
 		if ($sharingEnabled && $groupsOnly) {
@@ -335,18 +357,30 @@ class PrincipalTest extends TestCase {
 				->method('getUserGroupIds')
 				->with($user3)
 				->will($this->returnValue(['group3', 'group4']));
+			$this->groupManager->expects($this->at(3))
+				->method('getUserGroupIds')
+				->with($user3)
+				->will($this->returnValue(['group3', 'group4']));
+			$this->groupManager->expects($this->at(4))
+				->method('getUserGroupIds')
+				->with($user4)
+				->will($this->returnValue(['group4', 'group5']));
 		}
 
 
 		$this->assertEquals($result, $this->connector->searchPrincipals('principals/users',
-			['{http://sabredav.org/ns}email-address' => 'user']));
+			['{http://sabredav.org/ns}email-address' => 'user@example.com',
+				'{DAV:}displayname' => 'User 12'], $test));
 	}
 
 	public function searchPrincipalsDataProvider() {
 		return [
-			[true, false, ['principals/users/user2', 'principals/users/user3']],
-			[true, true, ['principals/users/user2']],
-			[false, false, []],
+			[true, false, 'allof', ['principals/users/user3']],
+			[true, false, 'anyof', ['principals/users/user2', 'principals/users/user3', 'principals/users/user4']],
+			[true, true, 'allof', []],
+			[true, true, 'anyof', ['principals/users/user2', 'principals/users/user4']],
+			[false, false, 'allof', []],
+			[false, false, 'anyof', []],
 		];
 	}
 

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

@@ -1,10 +1,12 @@
 <?php
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @copyright Copyright (c) 2018, Georg Ehrke
  *
  * @author Joas Schilling <coding@schilljs.com>
  * @author Roeland Jago Douma <roeland@famdouma.nl>
  * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
  *
  * @license AGPL-3.0
  *
@@ -26,22 +28,42 @@ namespace OCA\DAV\Tests\unit\DAV;
 
 use OC\Group\Group;
 use OCA\DAV\DAV\GroupPrincipalBackend;
+use OCP\IGroup;
 use OCP\IGroupManager;
-use PHPUnit_Framework_MockObject_MockObject;
+use OCP\IL10N;
+use OCP\IUser;
+use OCP\IUserSession;
+use OCP\Share\IManager;
 use \Sabre\DAV\PropPatch;
 
 class GroupPrincipalTest extends \Test\TestCase {
 
-	/** @var IGroupManager | PHPUnit_Framework_MockObject_MockObject */
+	/** @var IGroupManager | \PHPUnit_Framework_MockObject_MockObject */
 	private $groupManager;
 
+	/** @var IUserSession | \PHPUnit_Framework_MockObject_MockObject */
+	private $userSession;
+
+	/** @var IManager | \PHPUnit_Framework_MockObject_MockObject */
+	private $shareManager;
+
+	/** @var IL10N | \PHPUnit_Framework_MockObject_MockObject */
+	private $l10n;
+
 	/** @var GroupPrincipalBackend */
 	private $connector;
 
 	public function setUp() {
 		$this->groupManager = $this->createMock(IGroupManager::class);
+		$this->userSession = $this->createMock(IUserSession::class);
+		$this->shareManager = $this->createMock(IManager::class);
+		$this->l10n = $this->createMock(IL10N::class);
 
-		$this->connector = new GroupPrincipalBackend($this->groupManager);
+		$this->connector = new GroupPrincipalBackend(
+			$this->groupManager,
+			$this->userSession,
+			$this->shareManager,
+			$this->l10n);
 		parent::setUp();
 	}
 
@@ -59,14 +81,26 @@ class GroupPrincipalTest extends \Test\TestCase {
 			->with('')
 			->will($this->returnValue([$group1, $group2]));
 
+		$this->l10n->expects($this->at(0))
+			->method('t')
+			->with('%s (group)', ['foo'])
+			->will($this->returnValue('foo (Gruppe)'));
+
+		$this->l10n->expects($this->at(1))
+			->method('t')
+			->with('%s (group)', ['bar'])
+			->will($this->returnValue('bar (Gruppe)'));
+
 		$expectedResponse = [
 			0 => [
 				'uri' => 'principals/groups/foo',
-				'{DAV:}displayname' => 'foo'
+				'{DAV:}displayname' => 'foo (Gruppe)',
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
 			],
 			1 => [
 				'uri' => 'principals/groups/bar',
-				'{DAV:}displayname' => 'bar',
+				'{DAV:}displayname' => 'bar (Gruppe)',
+				'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
 			]
 		];
 		$response = $this->connector->getPrincipalsByPrefix('principals/groups');
@@ -92,9 +126,15 @@ class GroupPrincipalTest extends \Test\TestCase {
 			->with('foo')
 			->will($this->returnValue($group1));
 
+		$this->l10n->expects($this->at(0))
+			->method('t')
+			->with('%s (group)', ['foo'])
+			->will($this->returnValue('foo (Gruppe)'));
+
 		$expectedResponse = [
 			'uri' => 'principals/groups/foo',
-			'{DAV:}displayname' => 'foo'
+			'{DAV:}displayname' => 'foo (Gruppe)',
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
 		];
 		$response = $this->connector->getPrincipalByPath('principals/groups/foo');
 		$this->assertSame($expectedResponse, $response);
@@ -108,9 +148,15 @@ class GroupPrincipalTest extends \Test\TestCase {
 			->with('foo')
 			->will($this->returnValue($fooUser));
 
+		$this->l10n->expects($this->at(0))
+			->method('t')
+			->with('%s (group)', ['foo'])
+			->will($this->returnValue('foo (Gruppe)'));
+
 		$expectedResponse = [
 			'uri' => 'principals/groups/foo',
-			'{DAV:}displayname' => 'foo',
+			'{DAV:}displayname' => 'foo (Gruppe)',
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
 		];
 		$response = $this->connector->getPrincipalByPath('principals/groups/foo');
 		$this->assertSame($expectedResponse, $response);
@@ -135,9 +181,15 @@ class GroupPrincipalTest extends \Test\TestCase {
 			->with('foo/bar')
 			->will($this->returnValue($group1));
 
+		$this->l10n->expects($this->at(0))
+			->method('t')
+			->with('%s (group)', ['foo/bar'])
+			->will($this->returnValue('foo/bar (Gruppe)'));
+
 		$expectedResponse = [
 			'uri' => 'principals/groups/foo%2Fbar',
-			'{DAV:}displayname' => 'foo/bar'
+			'{DAV:}displayname' => 'foo/bar (Gruppe)',
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
 		];
 		$response = $this->connector->getPrincipalByPath('principals/groups/foo/bar');
 		$this->assertSame($expectedResponse, $response);
@@ -165,10 +217,129 @@ class GroupPrincipalTest extends \Test\TestCase {
 		$this->assertSame(0, $this->connector->updatePrincipal('foo', new PropPatch(array())));
 	}
 
-	public function testSearchPrincipals() {
+	public function testSearchPrincipalsWithEmptySearchProperties() {
 		$this->assertSame([], $this->connector->searchPrincipals('principals/groups', []));
 	}
 
+	public function testSearchPrincipalsWithWrongPrefixPath() {
+		$this->assertSame([], $this->connector->searchPrincipals('principals/users',
+			['{DAV:}displayname' => 'Foo']));
+	}
+
+	/**
+	 * @dataProvider searchPrincipalsDataProvider
+	 */
+	public function testSearchPrincipals($sharingEnabled, $groupsOnly, $test, $result) {
+		$this->shareManager->expects($this->once())
+			->method('shareAPIEnabled')
+			->will($this->returnValue($sharingEnabled));
+
+		if ($sharingEnabled) {
+			$this->shareManager->expects($this->once())
+				->method('shareWithGroupMembersOnly')
+				->will($this->returnValue($groupsOnly));
+
+			if ($groupsOnly) {
+				$user = $this->createMock(IUser::class);
+				$this->userSession->expects($this->once())
+					->method('getUser')
+					->will($this->returnValue($user));
+
+				$this->groupManager->expects($this->once())
+					->method('getUserGroupIds')
+					->with($user)
+					->will($this->returnValue(['group1', 'group2', 'group5']));
+			}
+		} else {
+			$this->shareManager->expects($this->never())
+				->method('shareWithGroupMembersOnly');
+			$this->groupManager->expects($this->never())
+				->method($this->anything());
+		}
+
+		$group1 = $this->createMock(IGroup::class);
+		$group1->method('getGID')->will($this->returnValue('group1'));
+		$group2 = $this->createMock(IGroup::class);
+		$group2->method('getGID')->will($this->returnValue('group2'));
+		$group3 = $this->createMock(IGroup::class);
+		$group3->method('getGID')->will($this->returnValue('group3'));
+		$group4 = $this->createMock(IGroup::class);
+		$group4->method('getGID')->will($this->returnValue('group4'));
+		$group5 = $this->createMock(IGroup::class);
+		$group5->method('getGID')->will($this->returnValue('group5'));
+
+		if ($sharingEnabled) {
+			$this->groupManager->expects($this->once())
+				->method('search')
+				->with('Foo')
+				->will($this->returnValue([$group1, $group2, $group3, $group4, $group5]));
+		} else {
+			$this->groupManager->expects($this->never())
+				->method('search');
+		}
+
+		$this->assertSame($result, $this->connector->searchPrincipals('principals/groups',
+			['{DAV:}displayname' => 'Foo'], $test));
+	}
+
+	public function searchPrincipalsDataProvider() {
+		return [
+			[true, false, 'allof', ['principals/groups/group1', 'principals/groups/group2', 'principals/groups/group3', 'principals/groups/group4', 'principals/groups/group5']],
+			[true, false, 'anyof', ['principals/groups/group1', 'principals/groups/group2', 'principals/groups/group3', 'principals/groups/group4', 'principals/groups/group5']],
+			[true, true, 'allof', ['principals/groups/group1', 'principals/groups/group2', 'principals/groups/group5']],
+			[true, true, 'anyof', ['principals/groups/group1', 'principals/groups/group2', 'principals/groups/group5']],
+			[false, false, 'allof', []],
+			[false, false, 'anyof', []],
+		];
+	}
+
+	/**
+	 * @dataProvider findByUriDataProvider
+	 */
+	public function testFindByUri($sharingEnabled, $groupsOnly, $findUri, $result) {
+		$this->shareManager->expects($this->once())
+			->method('shareAPIEnabled')
+			->will($this->returnValue($sharingEnabled));
+
+		if ($sharingEnabled) {
+			$this->shareManager->expects($this->once())
+				->method('shareWithGroupMembersOnly')
+				->will($this->returnValue($groupsOnly));
+
+			if ($groupsOnly) {
+				$user = $this->createMock(IUser::class);
+				$this->userSession->expects($this->once())
+					->method('getUser')
+					->will($this->returnValue($user));
+
+				$this->groupManager->expects($this->at(0))
+					->method('getUserGroupIds')
+					->with($user)
+					->will($this->returnValue(['group1', 'group2', 'group5']));
+			}
+		} else {
+			$this->shareManager->expects($this->never())
+				->method('shareWithGroupMembersOnly');
+			$this->groupManager->expects($this->never())
+				->method($this->anything());
+		}
+
+		$this->assertEquals($result, $this->connector->findByUri($findUri, 'principals/groups'));
+	}
+
+	public function findByUriDataProvider() {
+		return [
+			[false, false, 'principal:principals/groups/group1', null],
+			[false, false, 'principal:principals/groups/group3', null],
+			[false, true, 'principal:principals/groups/group1', null],
+			[false, true, 'principal:principals/groups/group3', null],
+			[true, true, 'principal:principals/groups/group1', 'principals/groups/group1'],
+			[true, true, 'principal:principals/groups/group3', null],
+			[true, false, 'principal:principals/groups/group1', 'principals/groups/group1'],
+			[true, false, 'principal:principals/groups/group3', 'principals/groups/group3'],
+		];
+	}
+
 	/**
 	 * @return Group|\PHPUnit_Framework_MockObject_MockObject
 	 */