public async Task <UserWord> AddWord(Word word, string userId)
{
if (string.IsNullOrEmpty(userId))
{
throw new EmptyUserIdException();
}
if (string.IsNullOrEmpty(word.Spelling))
{
throw new EmptySpellingException();
}
Word currentWord = await _wordRepository.GetWord(word.Id) ?? (await _wordRepository.GetWord(word.Spelling) ?? await _wordRepository.AddWord(word));
UserWord userWord = await _learningRepository.GetUserWord(currentWord.Id, userId) ??
await _learningRepository.AddUserWord(new UserWord
{
WordId = currentWord.Id,
UserId = userId
});
return(userWord);
}