casino-server
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An multi-rule scalable online poker game server powered by redis, node.js and socket.io
327 lines (271 loc) • 7.63 kB
JavaScript
var Poker = require('./poker');
var POKER_CARDS = Poker.CARDS;
var HIGH_CARD = 1, // 高牌, AQ953
ONE_PAIR = 2, // 一对, KK854
TWO_PAIR = 3, // 两对, KKJJ9
THREE = 4, // 三条, KKK98
STRAIGHT = 5, // 顺子, 98765
FLUSH = 6, // 同花,
FULLHOUSE = 7, // 葫芦, KKK99
FOUR = 8, // 四条, KKKK9
STRAIGHT_FLUSH = 9, // 同花顺, 98765
ROYAL_FLUSH = 10; // 皇家同花顺, AKQJ10
var HOLDEM_PATTERNS = {
0: 'invalid', // 错误
1: 'high card', // 高牌
2: 'one pair', // 一对
3: 'two pair', // 两对
4: 'three of a kind', // 三条
5: 'straight', // 顺子
6: 'flush', // 同花
7: 'fullhouse', // 葫芦
8: 'four of a kind', // 四条
9: 'straight flush', // 同花顺
10: 'royal flush' // 皇家同花顺
};
var Holdem = {
HIGH_CARD: 1,
ONE_PAIR: 2,
TWO_PAIR: 3,
THREE: 4,
STRAIGHT: 5,
FLUSH: 6,
FULLHOUSE: 7,
FOUR: 8,
STRAIGHT_FLUSH: 9,
ROYAL_FLUSH: 10,
PATTERNS: HOLDEM_PATTERNS,
};
exports = module.exports = Holdem;
Holdem.sort = function(cards) {
if(cards.length != 5) return cards;
Poker.sortByNumber(cards);
var n0 = cards[0] & 0xf,
n1 = cards[1] & 0xf,
n2 = cards[2] & 0xf,
n3 = cards[3] & 0xf,
n4 = cards[4] & 0xf;
var d0 = n0 - n1,
d1 = n1 - n2,
d2 = n2 - n3,
d3 = n3 - n4;
if((d1 === 0) && (d2 === 0)) {
if(d0 === 0) {
// XXXXM
} else if(d3 === 0) {
// MXXXX -> XXXXM
cards.push( cards.shift() );
} else {
// MXXXN
var c0 = cards.shift();
cards.splice(3, 0, c0);
}
} else if((d0 === 0) && (d1 === 0)) {
// XXXMN, or XXXMM
} else if((d2 === 0) && (d3 === 0)) {
// MNXXX -> XXXMN
cards.push( cards.shift() );
cards.push( cards.shift() );
} else if((d0 === 0) && (d2 === 0)) { //edit by kalbas d1->d2
// XXYYM
} else if((d0 === 0) && (d3 === 0)) {
// XXMYY -> XXYYM
var c2 = cards[2];
cards.splice(2, 1);
cards.push( c2 );
} else if((d1 === 0) && (d3 === 0)) {
// MXXYY -> XXYYM
cards.push( cards.shift() );
} else if(d0 === 0) {
// XXABC
} else if(d1 === 0) {
// AXXBC -> XXABC
var c_0 = cards.shift();
cards.splice(2, 0, c_0);
} else if(d2 === 0) {
// ABXXC -> XXABC
var c_2 = cards[2], c_3 = cards[3];
cards.splice(2, 2);
cards.unshift(c_3);
cards.unshift(c_2);
} else if(d3 === 0) { //edit by kalbas added d3 condition
// ABCXX -> XXABC
cards.push( cards.shift() );
cards.push( cards.shift() );
cards.push( cards.shift() );
} else {
// ABCDE
}
return cards;
};
Holdem.rank = function(cards) {
if(cards.length != 5) return 0;
Holdem.sort(cards);
var c0 = cards[0] >> 4,
c1 = cards[1] >> 4,
c2 = cards[2] >> 4,
c3 = cards[3] >> 4,
c4 = cards[4] >> 4;
var n0 = cards[0] & 0xf,
n1 = cards[1] & 0xf,
n2 = cards[2] & 0xf,
n3 = cards[3] & 0xf,
n4 = cards[4] & 0xf;
var d0 = n0 - n1,
d1 = n1 - n2,
d2 = n2 - n3,
d3 = n3 - n4;
var isFlush = ((c0 === c1) && (c1 === c2) && (c2 === c3) && (c3 === c4));
var isStraight;
if ((n0 === 14) && (d0 === 9)){
isStraight = ((n0 === 14) && (d0 === 9) && (d1 === 1) && (d2 === 1) && (d3 === 1)); // edited by kalbas A 5 4 3 2 1 straight
} else {
isStraight = ((d0 === 1) && (d1 === 1) && (d2 === 1) && (d3 === 1));
}
var rank = (n0 << 16) | (n1 << 12) | (n2 << 8) | (n3 << 4) | n4;
//edit by kalbas
//if we face an A5432 straight we should n0=1 and then calculate the rank
if ((n0 === 14) && (d0 === 9) && (d1 === 1) && (d2 === 1) && (d3 === 1)) {
var exceptionaln0 = 1;
rank = (exceptionaln0 << 16) | (n1 << 12) | (n2 << 8) | (n3 << 4) | n4;
}
//end edit by kalbas
var pattern = 0;
if(isFlush && isStraight) {
if(n4 === 10) { // Poker.NUMBER_RANK['A'] // edited by kalbas, n0=14 can be A5432 too, we use n4=11=jack
pattern = ROYAL_FLUSH;
} else {
pattern = STRAIGHT_FLUSH;
}
} else if((d0 === 0) && (d1 === 0) && (d2 === 0)) {
pattern = FOUR;
} else if((d0 === 0) && (d1 === 0) && (d3 === 0)) {
pattern = FULLHOUSE;
} else if(isFlush) {
pattern = FLUSH;
} else if(isStraight) {
pattern = STRAIGHT;
} else if((d0 === 0) && (d1 === 0)) {
pattern = THREE;
} else if((d0 === 0) && (d2 === 0)) {
pattern = TWO_PAIR;
} else if((d0 === 0)) {
pattern = ONE_PAIR;
} else {
pattern = HIGH_CARD;
}
return (pattern << 20) | rank;
};
/*
* 如有两名以上的牌手在最后一轮下注结束时仍未盖牌，则须进行斗牌。
* 斗牌时，每名牌手以自己的两张底牌，加上桌面五张公共牌，共七张牌中，取最大的五张牌组合决定胜负.
* 当中可包括两张或一张底牌，甚至只有公共牌。
*/
Holdem.maxFive = function(private_cards, shared_cards) {
var cards = Poker.sort( Poker.merge( Poker.clone(private_cards), shared_cards ) );
var len = cards.length;
if(len < 5 || len > 7 ) return null;
var maxrank = 0, maxcards = null, i, j, tmp, tmprank;
if(len === 5) {
return cards;
} else if(len === 6) {
for(j=0; j<6; j++) {
tmp = Poker.clone(cards);
tmp.splice(j, 1);
tmprank = Holdem.rank( tmp );
if(tmprank > maxrank) {
maxrank = tmprank;
maxcards = tmp;
}
}
} else if(len === 7) {
/*
for(i=0; i<7; i++) {
for(j=0; j<6; j++) {
tmp = Poker.clone(cards);
tmp.splice(i, 1);
tmp.splice(j, 1);
tmprank = Holdem.rank( tmp );
if(tmprank > maxrank) {
maxrank = tmprank;
maxcards = tmp;
}
}
}
*/
// edit start by kalbas
// we rank only board cards at first, all 5 of them
tmprank = Holdem.rank( shared_cards );
if(tmprank > maxrank) {
maxrank = tmprank;
maxcards = shared_cards;
}
// we rank 1st hole card + 4 board cards
for(j=0; j<5; j++) {
tmp = Poker.clone( shared_cards );
tmp.splice(j,1);
tmp.push( private_cards[0] );
tmprank = Holdem.rank( tmp );
if(tmprank > maxrank) {
maxrank = tmprank;
maxcards = tmp;
}
}
// we rank 2nd hole card + 4 board cards
for(j=0; j<5; j++) {
tmp = Poker.clone( shared_cards );
tmp.splice(j,1);
tmp.push( private_cards[1] );
tmprank = Holdem.rank( tmp );
if(tmprank > maxrank) {
maxrank = tmprank;
maxcards = tmp;
}
}
// we rank two hole cards + 3 board cards
var iii = [1,1,1,1,1,1,2,2,2,3];
var jjj = [2,2,2,3,3,4,3,3,4,4];
var kkk = [3,4,5,4,5,5,4,5,5,5];
/*
There are 10 ways to choose 3
cards out of 5, (5x4x3)/(3x2x1)
123(45) 124(35) 125(34) 134(25)
135(24) 145(23) 234(15) 235(14)
245(13) 345(12) therefore:
push : iii[n] + jjj[n] + kkk[n]
and then add two hole cards
*/
for(j=0; j<10; j++) {
tmp = [];
tmp.push( shared_cards[iii[j]-1] );
tmp.push( shared_cards[jjj[j]-1] );
tmp.push( shared_cards[kkk[j]-1] );
tmp.push( private_cards[0] );
tmp.push( private_cards[1] );
tmprank = Holdem.rank( tmp );
if(tmprank > maxrank) {
maxrank = tmprank;
maxcards = tmp;
}
}
cards = maxcards;
console.log(Poker.visualize(cards)+' : '+Holdem.patternString(cards));
// end edit by kalbas
}
return maxcards;
};
Holdem.pattern = function(cards) {
return Holdem.rank(cards) >> 20;
};
Holdem.patternString = function(cards) {
return HOLDEM_PATTERNS[ Holdem.rank(cards) >> 20 ];
};
Holdem.compare = function(a, b) {
return Holdem.rank(a) - Holdem.rank(b);
};
Holdem.view = function(cards) {
var rank = Holdem.rank(cards);
var pattern = rank >> 20;
var str = Poker.visualize(cards).join(',') + ' -> ' + HOLDEM_PATTERNS[ pattern ] + ', rank:' + rank;
console.log( str );
};