BookStack\Repos\BookRepo::updateFromInput PHP Method

    public function updateFromInput(Book $book, $input)
    {
        if ($book->name !== $input['name']) {
            $book->slug = $this->findSuitableSlug($input['name'], $book->id);
        }
        $book->fill($input);
        $book->updated_by = user()->id;
        $book->save();
        $this->permissionService->buildJointPermissionsForEntity($book);
        return $book;
    }