b1d2b37064e1ec652e75a924dd5fb277ae4f7040
[vchess.git] / client / src / components / ComputerGame.vue
1 <template lang="pug">
2 BaseGame(
3 ref="basegame"
4 :game="game"
5 :vr="vr"
6 @newmove="processMove"
7 @gameover="gameOver"
8 )
9 </template>
10
11 <script>
12 import BaseGame from "@/components/BaseGame.vue";
13 import { store } from "@/store";
14 import Worker from "worker-loader!@/playCompMove";
15 export default {
16 name: "my-computer-game",
17 components: {
18 BaseGame
19 },
20 // gameInfo: fen + mode + vname
21 // mode: "auto" (game comp vs comp) or "versus" (normal)
22 props: ["gameInfo"],
23 data: function() {
24 return {
25 st: store.state,
26 game: {},
27 vr: null,
28 // Web worker to play computer moves without freezing interface:
29 timeStart: undefined, //time when computer starts thinking
30 compThink: false, //avoid asking a new move while one is being searched
31 compWorker: null
32 };
33 },
34 watch: {
35 "gameInfo.fen": function() {
36 this.launchGame();
37 },
38 "gameInfo.score": function(newScore) {
39 if (newScore != "*") {
40 this.game.score = newScore; //user action
41 if (!this.compThink) this.$emit("game-stopped"); //otherwise wait for comp
42 }
43 }
44 },
45 created: function() {
46 // Computer moves web worker logic:
47 this.compWorker = new Worker();
48 this.compWorker.onmessage = e => {
49 let compMove = e.data;
50 if (!compMove) {
51 this.compThink = false;
52 this.$emit("game-stopped"); //no more moves: mate or stalemate
53 return; //after game ends, no more moves, nothing to do
54 }
55 if (!Array.isArray(compMove)) compMove = [compMove]; //potential multi-move
56 // Small delay for the bot to appear "more human"
57 const delay = Math.max(500 - (Date.now() - this.timeStart), 0);
58 setTimeout(() => {
59 if (this.currentUrl != document.location.href) return; //page change
60 // NOTE: do not animate move if special display (ShowMoves != "all")
61 const animate = V.ShowMoves == "all";
62 const animDelay = animate ? 250 : 0;
63 let moveIdx = 0;
64 let self = this;
65 (function executeMove() {
66 self.$refs["basegame"].play(compMove[moveIdx++]);
67 if (moveIdx >= compMove.length) {
68 self.compThink = false;
69 if (self.game.score != "*")
70 //user action
71 self.$emit("game-stopped");
72 } else setTimeout(executeMove, 500 + animDelay);
73 })();
74 }, delay);
75 };
76 if (this.gameInfo.fen) this.launchGame();
77 },
78 methods: {
79 launchGame: function() {
80 this.compWorker.postMessage(["scripts", this.gameInfo.vname]);
81 this.compWorker.postMessage(["init", this.gameInfo.fen]);
82 this.vr = new V(this.gameInfo.fen);
83 const mycolor = Math.random() < 0.5 ? "w" : "b";
84 let players = [{ name: "Myself" }, { name: "Computer" }];
85 if (mycolor == "b") players = players.reverse();
86 this.currentUrl = document.location.href; //to avoid playing outside page
87 // NOTE: fen and fenStart are redundant in game object
88 this.game = Object.assign({}, this.gameInfo, {
89 fenStart: this.gameInfo.fen,
90 players: players,
91 mycolor: mycolor,
92 score: "*"
93 });
94 this.compWorker.postMessage(["init", this.gameInfo.fen]);
95 if (mycolor != "w" || this.gameInfo.mode == "auto")
96 this.playComputerMove();
97 },
98 // NOTE: a "goto" action could lead to an error when comp is thinking,
99 // but it's OK because from the user viewpoint the game just stops.
100 playComputerMove: function() {
101 this.timeStart = Date.now();
102 this.compThink = true;
103 this.compWorker.postMessage(["askmove"]);
104 },
105 processMove: function(move) {
106 if (this.game.score != "*") return;
107 // Send the move to web worker (including his own moves)
108 this.compWorker.postMessage(["newmove", move]);
109 // subTurn condition for Marseille (and Avalanche) rules
110 if (
111 (!this.vr.subTurn || this.vr.subTurn <= 1) &&
112 (this.gameInfo.mode == "auto" || this.vr.turn != this.game.mycolor)
113 ) {
114 this.playComputerMove();
115 }
116 },
117 gameOver: function(score, scoreMsg) {
118 this.game.score = score;
119 this.game.scoreMsg = scoreMsg;
120 this.$emit("game-over", score); //bubble up to Rules.vue
121 }
122 }
123 };
124 </script>