public async Task HandleRequest(IOwinContext context)
{
var pocket = context.Request.Query["pocket"];
var board = context.Request.Query["board"];
var callback = context.Request.Query["callback"];
if (string.IsNullOrWhiteSpace(board))
{
board = string.Empty;
}
var odds = new TexasHoldemOdds { Pocket = HoldemOddsCalculator.SortCards(pocket), Board = HoldemOddsCalculator.SortCards(board) };
var cacheOdds = Cache.Get(odds.GetCacheKey()) as TexasHoldemOdds;
if (cacheOdds == null)
{
Cache.Add(odds.GetCacheKey(), odds, _policy);
var calculator = new HoldemOddsCalculator();
cacheOdds = await calculator.Calculate(odds, o => Cache.Set(odds.GetCacheKey(), odds, _policy));
}
//check If-None-Match header etag to see if it matches our data hash
else if (context.Request.Headers["If-None-Match"] == cacheOdds.GetETag())
{
//if it does return 304 Not Modified
context.Response.StatusCode = 304;
return;
}
var jsonData = await Task.Factory.StartNew(() => JsonConvert.SerializeObject(cacheOdds));
var result = string.Empty;
if (string.IsNullOrWhiteSpace(callback))
{
context.Response.ContentType = "application/json";
result = jsonData;
}
else
{
context.Response.ContentType = "application/javascript";
result = callback + "(" + jsonData + ");";
}
//set the response as cached for cache duration
context.Response.Headers["Cache-Control"] = string.Format("max-age={0}", CACHE_DURATION_SECS);
//set etag
context.Response.ETag = cacheOdds.GetETag();
//Just in case, handle CORS
context.Response.Headers["Access-Control-Allow-Origin"] = "*";
await context.Response.WriteAsync(result);
}
public async Task <TexasHoldemOdds> Calculate(TexasHoldemOdds odds, Action <TexasHoldemOdds> saveState)
{
var outcomes = new List <PokerOutcome>();
for (var index = 0; index < Enum.GetNames(typeof(Hand.HandTypes)).Length; index++)
{
outcomes.Add(new PokerOutcome
{
HandType = ((Hand.HandTypes)index).ToString(),
WinChance = 0
});
}
odds.Outcomes = outcomes;
if (saveState != null)
{
saveState(odds);
}
return(await Task <TexasHoldemOdds> .Run(() =>
{
ulong playerMask = Hand.ParseHand(odds.Pocket); // Player Pocket Cards
ulong partialBoard = Hand.ParseHand(odds.Board); // Partial Board
// Calculate values for each hand type
double[] playerWins = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
double[] opponentWins = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
// Count of total hands examined.
long count = 0;
// Iterate through all possible opponent hands
foreach (ulong opponentMask in Hand.Hands(0UL, partialBoard | playerMask, 2).AsParallel())
{
// Iterate through all possible boards
foreach (ulong boardMask in Hand.Hands(partialBoard, opponentMask | playerMask, 5).AsParallel())
{
// Create a hand value for each player
uint playerHandValue = Hand.Evaluate(boardMask | playerMask, 7);
uint opponentHandValue = Hand.Evaluate(boardMask | opponentMask, 7);
// Calculate Winners
if (playerHandValue > opponentHandValue)
{
// Player Win
playerWins[Hand.HandType(playerHandValue)] += 1.0;
}
else if (playerHandValue < opponentHandValue)
{
// Opponent Win
opponentWins[Hand.HandType(opponentHandValue)] += 1.0;
}
else if (playerHandValue == opponentHandValue)
{
// Give half credit for ties.
playerWins[Hand.HandType(playerHandValue)] += 0.5;
opponentWins[Hand.HandType(opponentHandValue)] += 0.5;
}
count++;
}
for (var index = 0; index < playerWins.Length; index++)
{
outcomes[index].WinChance = playerWins[index] / ((double)count);
}
if (saveState != null)
{
saveState(odds);
}
}
odds.OverallWinSplitChance = odds.Outcomes.Sum(o => o.WinChance);
odds.Completed = true;
if (saveState != null)
{
saveState(odds);
}
return odds;
}));
}
static void Main(string[] args)
{
Console.WriteLine(Assembly.GetExecutingAssembly().GetName().FullName);
Console.WriteLine();
if (args.Length < 1)
{
Console.WriteLine("Please specifiy output folder path");
return;
}
_outputPath = args[0];
Directory.CreateDirectory(_outputPath);
bool overwrite = false;
if (args.Length > 1)
{
if (args[1].Equals("/overwrite", StringComparison.InvariantCultureIgnoreCase))
{
overwrite = true;
}
}
var deck = GenerateDeck();
var calculator = new HoldemOddsCalculator();
var tasks = new List<Task>();
for (int i = 0; i < deck.Count; i++)
{
for (int j = 0; j < deck.Count; j++)
{
//must be different cards
if (i != j)
{
var odds = new TexasHoldemOdds { Pocket = HoldemOddsCalculator.SortCards(string.Format("{0} {1}", deck[i], deck[j])), Board = String.Empty };
//if the file exists, and we are not overwriting, skip these cards
if (!overwrite && File.Exists(Path.Combine(_outputPath, string.Format("{0}.json", odds.GetCacheKey()))))
{
Console.WriteLine("Skipping odds for pocket {0}", odds.Pocket);
continue;
}
Console.WriteLine("Generating odds for pocket {0}", odds.Pocket);
var calculateTask = calculator.Calculate(odds, o => Console.WriteLine("Updated odds for pocket {0}", o.Pocket));
calculateTask.ContinueWith(t => SaveOdds(t.Result));
tasks.Add(calculateTask);
//if we've got enough tasks to keep the processors busy
if (tasks.Count >= Environment.ProcessorCount)
{
//wait for any of them to finish
Task.WaitAny(tasks.ToArray(), Timeout.Infinite);
//remove any completed tasks
int k = 0;
while ( k < tasks.Count)
{
if (tasks[k].IsCompleted)
{
tasks.RemoveAt(k);
}
else
{
k++;
}
}
}
}
}
}
if (tasks.Count > 0)
{
//wait for the remainder to complete
Task.WaitAll(tasks.ToArray(), Timeout.Infinite);
}
var outPath = Path.Combine(_outputPath, "PrimeCache.json");
if (File.Exists(outPath))
{
File.Delete(outPath);
}
using (var outputArchive = new StreamWriter(outPath))
{
bool firstItem = true;
Directory.GetFiles(_outputPath, "*.json")
.Where(filePath => !filePath.Equals(outPath, StringComparison.InvariantCultureIgnoreCase))
.ToList().ForEach(filePath =>
{
if (firstItem)
{
outputArchive.Write("[");
firstItem = false;
}
else
{
outputArchive.WriteLine(",");
}
using (var inputStream = new StreamReader(filePath))
{
outputArchive.Write(inputStream.ReadToEnd());
}
});
outputArchive.WriteLine("]");
}
Console.WriteLine("Job Done");
}
public async Task<TexasHoldemOdds> Calculate(TexasHoldemOdds odds, Action<TexasHoldemOdds> saveState)
{
var outcomes = new List<PokerOutcome>();
for (var index = 0; index < Enum.GetNames(typeof(Hand.HandTypes)).Length; index++)
{
outcomes.Add(new PokerOutcome
{
HandType = ((Hand.HandTypes)index).ToString(),
WinChance = 0
});
}
odds.Outcomes = outcomes;
if (saveState != null)
{
saveState(odds);
}
return await Task<TexasHoldemOdds>.Run(() =>
{
ulong playerMask = Hand.ParseHand(odds.Pocket); // Player Pocket Cards
ulong partialBoard = Hand.ParseHand(odds.Board); // Partial Board
// Calculate values for each hand type
double[] playerWins = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
double[] opponentWins = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
// Count of total hands examined.
long count = 0;
// Iterate through all possible opponent hands
foreach (ulong opponentMask in Hand.Hands(0UL, partialBoard | playerMask, 2).AsParallel())
{
// Iterate through all possible boards
foreach (ulong boardMask in Hand.Hands(partialBoard, opponentMask | playerMask, 5).AsParallel())
{
// Create a hand value for each player
uint playerHandValue = Hand.Evaluate(boardMask | playerMask, 7);
uint opponentHandValue = Hand.Evaluate(boardMask | opponentMask, 7);
// Calculate Winners
if (playerHandValue > opponentHandValue)
{
// Player Win
playerWins[Hand.HandType(playerHandValue)] += 1.0;
}
else if (playerHandValue < opponentHandValue)
{
// Opponent Win
opponentWins[Hand.HandType(opponentHandValue)] += 1.0;
}
else if (playerHandValue == opponentHandValue)
{
// Give half credit for ties.
playerWins[Hand.HandType(playerHandValue)] += 0.5;
opponentWins[Hand.HandType(opponentHandValue)] += 0.5;
}
count++;
}
for (var index = 0; index < playerWins.Length; index++)
{
outcomes[index].WinChance = playerWins[index] / ((double)count);
}
if (saveState != null)
{
saveState(odds);
}
}
odds.OverallWinSplitChance = odds.Outcomes.Sum(o => o.WinChance);
odds.Completed = true;
if (saveState != null)
{
saveState(odds);
}
return odds;
});
}
private static void SaveOdds(TexasHoldemOdds odds)
{
Console.WriteLine("Saving generated odds for pocket {0}", odds.Pocket);
var json = JsonConvert.SerializeObject(odds);
File.WriteAllText(Path.Combine(_outputPath, string.Format("{0}.json", odds.GetCacheKey())), json);
}