fix opened state of folders is not restored

Signed-off-by: anoy <anoymouserver+github@mailbox.org>

CHANGELOG.md

@@ -4,6 +4,9 @@ The format is almost based on [Keep a Changelog](https://keepachangelog.com/en/1
 
 ## [Unreleased]
 
+### Fixed
+- opened state of folders is not restored (#1040)
+
 ## [15.2.0-beta1] - 2021-01-11
 
 ### Changed

lib/Db/Folder.php

@@ -167,6 +167,7 @@ public function toAPI(): array
             [
                 'id',
                 'name',
+                'opened',
                 'feeds'
             ]
         );

tests/Unit/Db/FolderTest.php

@@ -25,11 +25,13 @@ public function testToAPI()
         $folder = new Folder();
         $folder->setId(3);
         $folder->setName('name');
+        $folder->setOpened(false);
 
         $this->assertEquals(
             [
                 'id' => 3,
                 'name' => 'name',
+                'opened' => false,
                 'feeds' => [],
             ], $folder->toAPI()
         );