dav search to honour sharing.maxAutocompleteResults setting

- it is being used on frontend by users
- user and big instances benefit from quicker results and less load

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

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

@@ -270,6 +270,7 @@ class Principal implements BackendInterface {
 			}
 		}
 
+		$searchLimit = $this->config->getSystemValue('sharing.maxAutocompleteResults', null);
 		foreach ($searchProperties as $prop => $value) {
 			switch ($prop) {
 				case '{http://sabredav.org/ns}email-address':
@@ -305,7 +306,7 @@ class Principal implements BackendInterface {
 					break;
 
 				case '{DAV:}displayname':
-					$users = $this->userManager->searchDisplayName($value);
+					$users = $this->userManager->searchDisplayName($value, $searchLimit);
 
 					if (!$allowEnumeration) {
 						$users = \array_filter($users, static function (IUser $user) use ($value) {

apps/dav/lib/DAV/GroupPrincipalBackend.php

@@ -27,6 +27,7 @@
 
 namespace OCA\DAV\DAV;
 
+use OCP\IConfig;
 use OCP\IGroup;
 use OCP\IGroupManager;
 use OCP\IUser;
@@ -47,18 +48,24 @@ class GroupPrincipalBackend implements BackendInterface {
 
 	/** @var IShareManager */
 	private $shareManager;
+	/** @var IConfig */
+	private $config;
 
 	/**
 	 * @param IGroupManager $IGroupManager
 	 * @param IUserSession $userSession
 	 * @param IShareManager $shareManager
 	 */
-	public function __construct(IGroupManager $IGroupManager,
-								IUserSession $userSession,
-								IShareManager $shareManager) {
+	public function __construct(
+		IGroupManager $IGroupManager,
+		IUserSession $userSession,
+		IShareManager $shareManager,
+		IConfig $config
+	) {
 		$this->groupManager = $IGroupManager;
 		$this->userSession = $userSession;
 		$this->shareManager = $shareManager;
+		$this->config = $config;
 	}
 
 	/**
@@ -205,10 +212,11 @@ class GroupPrincipalBackend implements BackendInterface {
 			$restrictGroups = $this->groupManager->getUserGroupIds($user);
 		}
 
+		$searchLimit = $this->config->getSystemValue('sharing.maxAutocompleteResults', null);
 		foreach ($searchProperties as $prop => $value) {
 			switch ($prop) {
 				case '{DAV:}displayname':
-					$groups = $this->groupManager->search($value);
+					$groups = $this->groupManager->search($value, $searchLimit);
 
 					$results[] = array_reduce($groups, function (array $carry, IGroup $group) use ($restrictGroups) {
 						$gid = $group->getGID();

apps/dav/lib/RootCollection.php

@@ -72,7 +72,7 @@ class RootCollection extends SimpleCollection {
 			$proxyMapper,
 			\OC::$server->getConfig()
 		);
-		$groupPrincipalBackend = new GroupPrincipalBackend($groupManager, $userSession, $shareManager);
+		$groupPrincipalBackend = new GroupPrincipalBackend($groupManager, $userSession, $shareManager, $config);
 		$calendarResourcePrincipalBackend = new ResourcePrincipalBackend($db, $userSession, $groupManager, $logger, $proxyMapper);
 		$calendarRoomPrincipalBackend = new RoomPrincipalBackend($db, $userSession, $groupManager, $logger, $proxyMapper);
 		// as soon as debug mode is enabled we allow listing of principals

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

@@ -31,6 +31,7 @@ namespace OCA\DAV\Tests\unit\DAV;
 
 use OC\Group\Group;
 use OCA\DAV\DAV\GroupPrincipalBackend;
+use OCP\IConfig;
 use OCP\IGroup;
 use OCP\IGroupManager;
 use OCP\IUser;
@@ -39,6 +40,8 @@ use OCP\Share\IManager;
 use Sabre\DAV\PropPatch;
 
 class GroupPrincipalTest extends \Test\TestCase {
+	/** @var IConfig|\PHPUnit\Framework\MockObject\MockObject */
+	private $config;
 
 	/** @var IGroupManager | \PHPUnit\Framework\MockObject\MockObject */
 	private $groupManager;
@@ -56,11 +59,14 @@ class GroupPrincipalTest extends \Test\TestCase {
 		$this->groupManager = $this->createMock(IGroupManager::class);
 		$this->userSession = $this->createMock(IUserSession::class);
 		$this->shareManager = $this->createMock(IManager::class);
+		$this->config = $this->createMock(IConfig::class);
 
 		$this->connector = new GroupPrincipalBackend(
 			$this->groupManager,
 			$this->userSession,
-			$this->shareManager);
+			$this->shareManager,
+			$this->config
+		);
 		parent::setUp();
 	}
 
@@ -167,6 +173,23 @@ class GroupPrincipalTest extends \Test\TestCase {
 		$this->assertSame($expectedResponse, $response);
 	}
 
+	public function testGetPrincipalsByPathGroupWithHash() {
+		$group1 = $this->mockGroup('foo#bar');
+		$this->groupManager
+			->expects($this->once())
+			->method('get')
+			->with('foo#bar')
+			->willReturn($group1);
+
+		$expectedResponse = [
+			'uri' => 'principals/groups/foo%23bar',
+			'{DAV:}displayname' => 'Group foo#bar',
+			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
+		];
+		$response = $this->connector->getPrincipalByPath('principals/groups/foo#bar');
+		$this->assertSame($expectedResponse, $response);
+	}
+
 	public function testGetGroupMemberSet() {
 		$response = $this->connector->getGroupMemberSet('principals/groups/foo');
 		$this->assertSame([], $response);