private object SetVote(LinkVote vote)
{
NormalizeValue(vote);
var existingVote = Db.LinkVotes.FirstOrDefault(lv => lv.VoterId == LoginManager.CurrentUser.Id && lv.LinkId == vote.LinkId);
if (existingVote != null)
{
if (vote.Value == 0)
{
Db.LinkVotes.Remove(existingVote);
}
else
{
existingVote.Value = vote.Value;
}
}
else
{
vote.Voter = LoginManager.CurrentUser;
Db.LinkVotes.Add(vote);
}
int voteTally = Db
.Links
.Include(l => l.Votes)
.FirstOrDefault(l => l.Id == vote.LinkId).VoteTally;
return(new {
VoteTally = voteTally,
UpvoteCurrentUser = vote.Value == 1,
DownvoteCurrentUser = vote.Value == -1
});
}
public async Task <IActionResult> AddVote(int id)
{
bool hasVoted = _linkVotes.VoteCheck(id, _userManager.GetUserId(User));
if (!hasVoted)
{
await _links.AddVote(id);
}
else
{
TempData["alert"] = "alert";
return(RedirectToAction(nameof(Index)));
}
LinkVote linkVote = new LinkVote
{
LinkId = id,
ApplicationUserId = _userManager.GetUserId(User)
};
await _linkVotes.Add(linkVote);
return(RedirectToAction(nameof(Index)));
}
public object Post(LinkVote vote)
{
// TODO: if no LinkId, return an error
var result = SetVote(vote);
Db.SaveChanges();
return(result);
}
private void NormalizeValue(LinkVote vote)
{
if (vote.Value < 0)
{
vote.Value = -1;
}
else if (vote.Value > 1)
{
vote.Value = 1;
}
}
private Task Vote(int id, ClaimsPrincipal user, int value, CancellationToken ct)
{
var vote = new LinkVote
{
LinkId = id,
User = user.FindFirst(BobbinsClaimTypes.ScreenName)?.Value,
Value = value
};
return(_http.PutJsonAsync("/votes", vote, ct));
}
