/// <summary>
/// Remove a 'Like' from the Tweet if it's already exists
/// or add new if it's not
/// </summary>
/// <param name="tweetId"></param>
/// <param name="user"></param>
/// <returns></returns>
public async Task <int> UpdateLikes(int tweetId, TwitterCopyUser user)
{
var tweet = await _tweetRepository.GetTweetWithLikesAsync(tweetId);
// Apply the user and tweet object from above to the new Like
var like = new Like
{
Tweet = tweet,
User = user,
};
// Check if the user already has like on this tweet
var dupe = tweet.Likes.FirstOrDefault(x => x.UserId.Equals(user.Id));
if (dupe == null)
{
// If no duplicate was found
// Add new like to the database
_likeRepository.Add(like);
}
else
{
// If duplicate was found then
// Delete dupe instead of like because
// like doesn't have Id values
_likeRepository.Delete(dupe);
}
await _likeRepository.SaveAsync();
return(tweet.Likes.Count);
}
