public async Task <Retweet> Create(Retweet retweet)
{
RetweetModel model = await _dbContext.Retweet
.FirstOrDefaultAsync(r => r.TweetId == retweet.TweetId && r.UserId == retweet.UserId);
if (model != null)
{
throw new ArgumentException("Retweet already exist");
}
model = new RetweetModel
{
UserId = retweet.UserId,
TweetId = retweet.TweetId
};
_dbContext.Add <RetweetModel>(model);
await _dbContext.SaveChangesAsync();
return(new Retweet {
Id = model.Id,
UserId = model.UserId,
TweetId = model.TweetId
});
}
public async Task <bool> IsRetweeted(string userId, int tweetId)
{
RetweetModel model = await _dbContext.Retweet
.FirstOrDefaultAsync(r => r.UserId == userId && r.TweetId == tweetId);
if (model == null)
{
return(false);
}
return(true);
}
public async Task Remove(Retweet retweet)
{
RetweetModel model = await _dbContext.Retweet
.FirstOrDefaultAsync(r => r.UserId == retweet.UserId && r.TweetId == retweet.TweetId);
if (model == null)
{
throw new ArgumentException("Retweet not foud");
}
_dbContext.Remove <RetweetModel>(model);
await _dbContext.SaveChangesAsync();
}
public async Task <Retweet> GetInfo(Retweet retweet)
{
RetweetModel model = await _dbContext.Retweet
.Include(r => r.User)
.Include(r => r.Tweet)
.FirstOrDefaultAsync(r => r.UserId == retweet.UserId && r.TweetId == retweet.TweetId);
if (model == null)
{
throw new ArgumentNullException("Retweet not found while retrieving info.");
}
return(new Retweet {
Id = model.Id,
TweetId = model.TweetId,
UserId = model.UserId,
User = model.User,
Tweet = new Tweet {
Id = model.Tweet.Id, Text = model.Tweet.Text, UserId = model.UserId
}
});
}
public async Task Toggle(Retweet retweet)
{
AppUser user = _dbContext.Users.FirstOrDefault(u => u.Id == retweet.UserId);
if (user == null)
{
throw new ArgumentNullException("User not found");
}
TweetModel tweetModel = _dbContext.Tweet
.FirstOrDefault(t => t.Id == retweet.TweetId && t.UserId != retweet.UserId);
if (tweetModel == null)
{
throw new ArgumentNullException("Invalid tweet");
}
RetweetModel model = await _dbContext.Retweet
.FirstOrDefaultAsync(r => r.UserId == retweet.UserId && r.TweetId == retweet.TweetId);
if (model != null)
{
_dbContext.Remove <RetweetModel>(model);
await _dbContext.SaveChangesAsync();
return;
}
model = new RetweetModel {
TweetId = retweet.TweetId,
UserId = retweet.UserId
};
_dbContext.Add <RetweetModel>(model);
await _dbContext.SaveChangesAsync();
}
