public static PokerHandType GetPokerHandType(V1Hand hand)
{
var isFlush = IsFlush(hand);
var isStraight = IsStraight(hand);
if (isStraight && isFlush)
{
return(hand.Cards.Min(x => x.Rank) == 10 ? PokerHandType.RoyalFlush : PokerHandType.StraightFlush);
}
var rankDic = hand.Cards.GroupBy(x => x.Rank).ToDictionary(x => x.Key, x => x.Count());
var uniqueRankCount = rankDic.Keys.Count;
var mostOfRank = rankDic.Max(x => x.Value);
if (uniqueRankCount == 2)
{
return(mostOfRank == 4 ? PokerHandType.FourOfAKind : PokerHandType.FullHouse);
}
if (isFlush)
{
return(PokerHandType.Flush);
}
if (isStraight)
{
return(PokerHandType.Straight);
}
if (mostOfRank == 3)
{
return(PokerHandType.ThreeOfAKind);
}
var pairCount = rankDic.Values.Count(x => x == 2);
if (pairCount == 2)
{
return(PokerHandType.TwoPair);
}
else if (pairCount == 1)
{
return(PokerHandType.Pair);
}
return(PokerHandType.HighCard);
}
private static bool IsStraight(V1Hand hand)
{
return(hand.Cards.Select(x => x.Rank).OrderBy(x => x).IsConsecutive());
}
private static bool IsFlush(V1Hand hand)
{
return(hand.Cards.All(x => x.Suite == hand.Cards[0].Suite));
}