private async Task HandleChapterAchievement(int userId, List <Achievement> achievementsForUser, Chapter chapter)
{
List <Chapter> chaptersForUser = await courseRepo.GetCompletedChaptersForUser(userId);
if (!chaptersForUser.Contains(chapter))
{
await InsertUserChapter(userId, chapter.ChapterId);
Achievement achievementForChapterCount = await achievementService.GetAchievementForChapterCount(chaptersForUser.Count + 1);
if (achievementForChapterCount != null && !achievementsForUser.Contains(achievementForChapterCount))
{
await achievementService.InsertUserAchievement(userId, achievementForChapterCount.AchievementId);
}
}
}