+ /**
+ * Update the user's preferred book-list display setting.
+ * @param $id
+ * @param Request $request
+ * @return \Illuminate\Http\RedirectResponse
+ */
+ public function switchBookView($id, Request $request)
+ {
+ return $this->switchViewType($id, $request, 'books');
+ }
+
+ /**
+ * Update the user's preferred shelf-list display setting.
+ * @param $id
+ * @param Request $request
+ * @return \Illuminate\Http\RedirectResponse
+ */
+ public function switchShelfView($id, Request $request)
+ {
+ return $this->switchViewType($id, $request, 'bookshelves');
+ }
+
+ /**
+ * For a type of list, switch with stored view type for a user.
+ * @param integer $userId
+ * @param Request $request
+ * @param string $listName
+ * @return \Illuminate\Http\RedirectResponse
+ */
+ protected function switchViewType($userId, Request $request, string $listName)
+ {
+ $this->checkPermissionOrCurrentUser('users-manage', $userId);
+
+ $viewType = $request->get('view_type');
+ if (!in_array($viewType, ['grid', 'list'])) {
+ $viewType = 'list';
+ }
+
+ $user = $this->user->findOrFail($userId);
+ $key = $listName . '_view_type';
+ setting()->putUser($user, $key, $viewType);
+
+ return redirect()->back(302, [], "/settings/users/$userId");