luzhanqi/server.js

const express = require('express')
const app = express()
app.use(express.static('public'))
const host = process.env.HOST || '0.0.0.0'
const port = process.env.PORT || 3000
const server = app.listen(port, host, () => console.log(`陆战棋游戏运行在：http://${host}:${port}/`))
const io = require('socket.io')(server)

const clients = []
let currentPlayer = null

io.on('connection', (client) => {
    // 来人了
    clients.push(client)

    const i = clients.indexOf(client)
    if (i == 0) client.emit('role', '玩家1')
    else if (i == 1) client.emit('role', '玩家2')
    else client.emit('role', '旁观者')

    if (clients.length == 2) {
        currentPlayer = clients[0]
    }

    io.emit('player', clients.length < 2 || currentPlayer != clients[1] ? 'player1' : 'player2')

    // 人走了
    client.on('disconnect', () => {
        const idx = clients.indexOf(client)
        clients.splice(idx, 1)

        clients.forEach((c) => {
            const i = clients.indexOf(c)
            if (i == 0) c.emit('role', '玩家1')
            else if (i == 1) c.emit('role', '玩家2')
            else c.emit('role', '旁观者')
        })

        if (clients.length >= 2) {
            currentPlayer = clients[0]
        } else {
            currentPlayer = null
        }
        io.emit('player', clients.length < 2 || currentPlayer != clients[1] ? 'player1' : 'player2')
    })

    client.on('click', () => {
        if (clients.length >= 2 && client == currentPlayer) {
            // 切换玩家
            if (currentPlayer === clients[0]) {
                currentPlayer = clients[1]
                io.emit('player', 'player2')
            } else {
                currentPlayer = clients[0]
                io.emit('player', 'player1')
            }
        }
    })

    // console.log(`${client.handshake.address} 来了`)
    // client.emit('client', '旁观者')

    // if (players.length < 2) {
    //     players.push(client)
    //     if (players.length == 2) {
    //         // 游戏开始
    //         console.log('玩家就位，游戏开始')
    //         currentPlayer = players[0]
    //         io.emit('currentPlayer', currentPlayer === players[0] ? 'player1' : 'player2')
    //     }
    // }

    // if (players.length > 0 && client.id == players[0].id) client.emit('client', '玩家1')
    // else if (players.length == 2 && client.id == players[1].id) client.emit('client', '玩家2')
    // else client.emit('client', '旁观者')

    // client.on('click', () => {
    //     if (client == currentPlayer) {
    //         // 切换玩家
    //         if (currentPlayer === players[0]) {
    //             currentPlayer = players[1]
    //             io.emit('currentPlayer', 'player2')
    //         } else {
    //             currentPlayer = players[0]
    //             io.emit('currentPlayer', 'player1')
    //         }
    //     }
    // })

    // client.on('disconnect', () => {
    //     io.emit('client', '旁观者')
    //     if (players.includes(client)) {
    //         const playerNumber = players.indexOf(client)
    //         players.splice(playerNumber, 1)
    //     }
    //     if (players.length == 2) {
    //         // 游戏开始
    //         console.log('玩家就位，游戏开始')
    //         currentPlayer = players[0]
    //         io.emit('currentPlayer', currentPlayer === players[0] ? 'player1' : 'player2')
    //     }
    //     if (players.length > 0 && client.id == players[0].id) client.emit('client', '玩家1')
    //     else if (players.length == 2 && client.id == players[1].id) client.emit('client', '玩家2')
    //     else client.emit('client', '旁观者')
    // })

    // if (players.length < 2) {
    //     players.push(client)
    //     console.log(`玩家${players.length}加入了[${client.handshake.address}]`)
    //     if (players.length == 2) {
    //         // 广播当前是player1（玩家1, 黑色）
    //         currentPlayer = players[0]
    //         io.emit('currentPlayer', 'player1')
    //         // 向玩家1发出点击许可
    //         currentPlayer.emit('yourTurn')
    //     }
    // } else {
    //     console.log(`旁观者${client.handshake.address}来了`)
    //     if (currentPlayer === players[0]) {
    //         io.emit('currentPlayer', 'player1')
    //     } else {
    //         io.emit('currentPlayer', 'player2')
    //     }
    // }
    // client.on('click', () => {
    //     console.log(client.handshake.address, '点了按钮')
    //     if (currentPlayer === players[0]) {
    //         io.emit('currentPlayer', 'player2')
    //         currentPlayer = players[1]
    //     } else {
    //         io.emit('currentPlayer', 'player1')
    //         currentPlayer = players[0]
    //     }
    //     currentPlayer.emit('yourTurn')
    // })
})