public async Task AddAsync(int?authorId, int?textId, string content)
{
var suggestion = new Suggestion(content, 0);
if (authorId != null)
{
suggestion.SetAuthor(new User((int)authorId));
}
if (textId != null)
{
suggestion.SetText(new Text((int)textId));
}
await suggestionRepository.AddAsync(suggestion);
}