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server.js
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server.js
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var express = require('express');
var app = express();
var server = require('http').Server(app);
var io = require('socket.io')(server);
// 存放在线用户k-编号v-socket
var socketMap = {};
// 自增编号
var number = 0;
server.listen(5001);
app.use(express.static('public'));
io.on('connection', function (socket) {
number++;
socket.clientNum = number;
socketMap[number] = socket;
if (number % 2 === 1) {
socket.emit('waiting', number);
} else {
if (socketMap[number - 1]) {
socketMap[number - 1].emit("first");
socket.emit("second", number);
} else {
socket.emit("leave");
}
}
socket.on('go', function (i, j, isFail) {
socketMap[getMatch(socket.clientNum)].emit("go", i, j);
if (isFail) {
socketMap[getMatch(socket.clientNum)].emit("fail");
}
});
socket.on("disconnect", function () {
delete(socketMap[socket.clientNum]);
if (socket.clientNum % 2 !== 0 && !socketMap[getMatch(socket.clientNum)]) {
number++;
}
if (socketMap[getMatch(socket.clientNum)]) {
socketMap[getMatch(socket.clientNum)].emit('leave');
delete(socketMap[getMatch(socket.clientNum)]);
}
});
});
// 从1开始,奇数匹配加一的数,偶数匹配减一的数
function getMatch(num) {
if (num % 2 === 1) {
return num + 1;
} else {
return num - 1;
}
}