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
};
}
private void NormalizeValue(LinkVote vote)
{
if (vote.Value < 0) {
vote.Value = -1;
} else if (vote.Value > 1) {
vote.Value = 1;
}
}
public object Post(LinkVote vote)
{
// TODO: if no LinkId, return an error
var result = SetVote(vote);
Db.SaveChanges();
return result;
}