don't delete share table entries for the unique name if re-share permission was removed

apps/files_sharing/tests/share.php

@@ -246,6 +246,38 @@ class Test_Files_Sharing extends OCA\Files_sharing\Tests\TestCase {
 		\OC::$server->getConfig()->deleteSystemValue('share_folder');
 	}
 
+	function testShareWithGroupUniqueName() {
+		$this->loginHelper(self::TEST_FILES_SHARING_API_USER1);
+		\OC\Files\Filesystem::file_put_contents('test.txt', 'test');
+
+		$fileInfo = \OC\Files\Filesystem::getFileInfo('test.txt');
+
+		$this->assertTrue(
+				\OCP\Share::shareItem('file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_GROUP, self::TEST_FILES_SHARING_API_GROUP1, 23)
+		);
+
+		$this->loginHelper(self::TEST_FILES_SHARING_API_USER2);
+
+		$items = \OCP\Share::getItemsSharedWith('file');
+		$this->assertSame('/test.txt' ,$items[0]['file_target']);
+		$this->assertSame(23, $items[0]['permissions']);
+		
+		\OC\Files\Filesystem::rename('test.txt', 'new test.txt');
+
+		$items = \OCP\Share::getItemsSharedWith('file');
+		$this->assertSame('/new test.txt' ,$items[0]['file_target']);
+		$this->assertSame(23, $items[0]['permissions']);
+		
+		$this->loginHelper(self::TEST_FILES_SHARING_API_USER1);
+		\OCP\Share::setPermissions('file', $items[0]['item_source'], $items[0]['share_type'], $items[0]['share_with'], 3);
+
+		$this->loginHelper(self::TEST_FILES_SHARING_API_USER2);
+		$items = \OCP\Share::getItemsSharedWith('file');
+
+		$this->assertSame('/new test.txt' ,$items[0]['file_target']);
+		$this->assertSame(3, $items[0]['permissions']);
+	}
+
 	/**
 	 * shared files should never have delete permissions
 	 * @dataProvider  DataProviderTestFileSharePermissions

lib/private/share/helper.php

@@ -96,12 +96,12 @@ class Helper extends \OC\Share\Constants {
 			// finding and deleting the reshares by a single user of a group share
 			if (count($ids) == 1 && isset($uidOwner)) {
 				$query = \OC_DB::prepare('SELECT `id`, `share_with`, `item_type`, `share_type`, `item_target`, `file_target`, `parent`'
-					.' FROM `*PREFIX*share` WHERE `parent` IN ('.$parents.') AND `uid_owner` = ?');
-				$result = $query->execute(array($uidOwner));
+					.' FROM `*PREFIX*share` WHERE `parent` IN ('.$parents.') AND `uid_owner` = ? AND `share_type` != ?');
+				$result = $query->execute(array($uidOwner, self::$shareTypeGroupUserUnique));
 			} else {
 				$query = \OC_DB::prepare('SELECT `id`, `share_with`, `item_type`, `share_type`, `item_target`, `file_target`, `parent`, `uid_owner`'
-					.' FROM `*PREFIX*share` WHERE `parent` IN ('.$parents.')');
-				$result = $query->execute();
+					.' FROM `*PREFIX*share` WHERE `parent` IN ('.$parents.') AND `share_type` != ?');
+				$result = $query->execute(array(self::$shareTypeGroupUserUnique));
 			}
 			// Reset parents array, only go through loop again if items are found
 			$parents = array();