Keep share link name if not specified in update call

apps/files_sharing/lib/API/Share20OCS.php

@@ -356,7 +356,10 @@ class Share20OCS {
 				$share->setPermissions(\OCP\Constants::PERMISSION_READ);
 			}
 
-			$share->setName($name);
+			// set name only if passed as parameter, empty string is allowed
+			if ($name !== null) {
+				$share->setName($name);
+			}
 
 			// Set password
 			$password = $this->request->getParam('password', '');
@@ -594,7 +597,7 @@ class Share20OCS {
 		 * expirationdate, password and publicUpload only make sense for link shares
 		 */
 		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
-			if ($permissions === null && $password === null && $publicUpload === null && $expireDate === null) {
+			if ($permissions === null && $password === null && $publicUpload === null && $expireDate === null && $name === null) {
 				$share->getNode()->unlock(ILockingProvider::LOCK_SHARED);
 				return new \OC\OCS\Result(null, 400, 'Wrong or no update parameter given');
 			}
@@ -641,7 +644,10 @@ class Share20OCS {
 				$newPermissions = \OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_DELETE;
 			}
 
-			$share->setName($name);
+			// set name only if passed as parameter, empty string is allowed
+			if ($name !== null) {
+				$share->setName($name);
+			}
 
 			if ($newPermissions !== null) {
 				$share->setPermissions($newPermissions);

apps/files_sharing/tests/API/Share20OCSTest.php

@@ -1942,6 +1942,83 @@ class Share20OCSTest extends TestCase {
 		$this->assertEquals($expected->getMeta(), $result->getMeta());
 		$this->assertEquals($expected->getData(), $result->getData());
 	}
+
+	public function testUpdateLinkShareNameAlone() {
+		$ocs = $this->mockFormatShare();
+
+		$date = new \DateTime('2000-01-01');
+
+		$folder = $this->createMock('\OCP\Files\Folder');
+
+		$share = \OC::$server->getShareManager()->newShare();
+		$share->setPermissions(\OCP\Constants::PERMISSION_READ)
+			->setSharedBy($this->currentUser->getUID())
+			->setShareType(Share::SHARE_TYPE_LINK)
+			->setName('somename')
+			->setNode($folder);
+
+		$this->request
+			->method('getParam')
+			->will($this->returnValueMap([
+				['name', null, 'another'],
+			]));
+
+		$this->shareManager->method('getShareById')->with('ocinternal:42')->willReturn($share);
+
+		$this->shareManager->expects($this->once())->method('updateShare')->with(
+			$this->callback(function (\OCP\Share\IShare $share) use ($date) {
+				return $share->getName() === 'another';
+			})
+		)->will($this->returnArgument(0));
+
+		$this->shareManager->method('getSharedWith')->willReturn([]);
+
+		$expected = new \OC\OCS\Result(null);
+		$result = $ocs->updateShare(42);
+
+		$this->assertEquals($expected->getMeta(), $result->getMeta());
+		$this->assertEquals($expected->getData(), $result->getData());
+	}
+
+	public function testUpdateLinkShareKeepNameWhenNotSpecified() {
+		$ocs = $this->mockFormatShare();
+
+		$date = new \DateTime('2000-01-01');
+
+		$folder = $this->createMock('\OCP\Files\Folder');
+
+		$share = \OC::$server->getShareManager()->newShare();
+		$share->setPermissions(\OCP\Constants::PERMISSION_READ)
+			->setSharedBy($this->currentUser->getUID())
+			->setShareType(Share::SHARE_TYPE_LINK)
+			->setName('somename')
+			->setNode($folder);
+
+		$this->request
+			->method('getParam')
+			->will($this->returnValueMap([
+				['password', null, 'test'],
+			]));
+
+		$this->shareManager->method('getShareById')->with('ocinternal:42')->willReturn($share);
+
+		$this->shareManager->expects($this->once())->method('updateShare')->with(
+			$this->callback(function (\OCP\Share\IShare $share) use ($date) {
+				return $share->getPermissions() === (\OCP\Constants::PERMISSION_READ) &&
+				$share->getPassword() === 'test' &&
+				$share->getName() === 'somename';
+			})
+		)->will($this->returnArgument(0));
+
+		$this->shareManager->method('getSharedWith')->willReturn([]);
+
+		$expected = new \OC\OCS\Result(null);
+		$result = $ocs->updateShare(42);
+
+		$this->assertEquals($expected->getMeta(), $result->getMeta());
+		$this->assertEquals($expected->getData(), $result->getData());
+	}
+	
 	public function dataFormatShare() {
 		$file = $this->createMock('\OCP\Files\File');
 		$folder = $this->createMock('\OCP\Files\Folder');