feat: add mc bot command

build.gradle.kts

@@ -15,6 +15,7 @@ version = fancyBotVersion
 repositories {
     mavenCentral()
     mavenLocal()
+    maven("https://repo.opencollab.dev/main/")
     maven("https://oss.sonatype.org/content/repositories/snapshots")
     maven("https://repo.rtast.cn/api/v4/projects/33/packages/maven")
     maven("https://repo.rtast.cn/api/v4/projects/19/packages/maven")
@@ -51,6 +52,7 @@ dependencies {
     implementation(libs.slf4j.api)
     implementation(libs.aws.s3.sdk)
     implementation(libs.rconlib)
+    implementation("org.geysermc.mcprotocollib:protocol:1.21-SNAPSHOT")
 }
 
 tasks.build {

src/main/kotlin/cn/rtast/fancybot/Const.kt

@@ -140,5 +140,5 @@ val commands = listOf(
     MinecraftWikiCommand(), GaoKaoDaysRemainCommand(), IdiomExplainCommand(), NiuziManagerCommand(),
     TodayEatCommand(), TodayDrinkCommand(), MCLoginCommand(), RCONCommand(),
     GravatarCommand(), PastebinCommand(), ShuffleEchoCommand(), TodayDontEatCommand(),
-    TodayDontDrinkCommand()
+    TodayDontDrinkCommand(), MCBotCommand()
 )

src/main/kotlin/cn/rtast/fancybot/commands/misc/MinecraftCommand.kt

@@ -4,7 +4,7 @@
  * Date: 2024/10/9
  */
 
-@file:Suppress("KDocUnresolvedReference")
+@file:Suppress("KDocUnresolvedReference", "unused")
 
 package cn.rtast.fancybot.commands.misc
 
@@ -30,6 +30,8 @@ import cn.rtast.fancybot.enums.mc.MCVersionType
 import cn.rtast.fancybot.rconManager
 import cn.rtast.fancybot.util.Http
 import cn.rtast.fancybot.util.Logger
+import cn.rtast.fancybot.util.mcbot.MCBot
+import cn.rtast.fancybot.util.mcbot.MCClient
 import cn.rtast.fancybot.util.misc.isFullyTransparent
 import cn.rtast.fancybot.util.misc.scaleImage
 import cn.rtast.fancybot.util.misc.toByteArray
@@ -38,11 +40,11 @@ import cn.rtast.fancybot.util.str.convertToHTML
 import cn.rtast.fancybot.util.str.decodeToString
 import cn.rtast.fancybot.util.str.encodeToBase64
 import cn.rtast.fancybot.util.str.fromJson
+import cn.rtast.fancybot.util.str.generateRandomString
 import cn.rtast.fancybot.util.str.toJson
 import cn.rtast.fancybot.util.str.uriEncode
 import cn.rtast.motdpinger.BedrockPing
 import cn.rtast.motdpinger.JavaPing
-import cn.rtast.rcon.RCon
 import cn.rtast.rcon.exceptions.AuthFailedException
 import cn.rtast.rob.entity.GroupMessage
 import cn.rtast.rob.entity.PrivateMessage
@@ -52,13 +54,15 @@ import cn.rtast.rob.util.ob.OneBotListener
 import cn.rtast.rob.util.ob.asMessageChain
 import cn.rtast.rob.util.ob.asNode
 import okhttp3.FormBody
+import org.geysermc.mcprotocollib.network.tcp.TcpClientSession
 import java.awt.AlphaComposite
 import java.awt.Color
 import java.awt.image.BufferedImage
 import java.net.SocketException
 import java.net.URI
-import java.util.Random
+import java.util.concurrent.Executors
 import javax.imageio.ImageIO
+import kotlin.random.Random
 
 @CommandDescription("获取MC最新的版本!")
 class MCVersionCommand : BaseCommand() {
@@ -593,4 +597,46 @@ class RCONCommand : BaseCommand() {
             }
         }
     }
+}
+
+class MCBotCommand : BaseCommand() {
+    override val commandNames = listOf("/mcbot")
+
+    private val userClientMap = mutableMapOf<Long, MutableList<TcpClientSession>>()
+
+    override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
+        val clients = mutableListOf<TcpClientSession>()
+        val action = args.first()
+        when (action) {
+            "s" -> {
+                val executor = Executors.newFixedThreadPool(100)
+                val host = args[1]
+                val port = args[2].toInt()
+                val count = args[3].toInt()
+                val msgContent = args.drop(4).joinToString(" ").trim()
+                val delay = if (args.size == 5) 2000L else args[5].toLong()
+                val continueSendMessage = msgContent.contains("!!while!!")
+                (1..count).forEach {
+                    val botName = generateRandomString()
+                    val client = MCClient(host, port, botName).createClient()
+                    clients.add(client)
+                }
+                clients.forEach {
+                    executor.execute {
+                        val bot = MCBot(msgContent.replace("!!while!!", ""), continueSendMessage, delay, it)
+                        bot.run()
+                    }
+                }
+                userClientMap[message.sender.userId] = clients
+            }
+
+            "c" -> {
+                if (userClientMap.containsKey(message.sender.userId)) {
+                    userClientMap[message.sender.userId]!!.forEach { it.disconnect("Bye~") }
+                    userClientMap.remove(message.sender.userId)
+                    message.reply("成功取消任务")
+                }
+            }
+        }
+    }
 }

src/main/kotlin/cn/rtast/fancybot/util/mcbot/MCBot.kt

@@ -0,0 +1,55 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/10/17
+ */
+
+
+package cn.rtast.fancybot.util.mcbot
+
+import org.geysermc.mcprotocollib.network.Session
+import org.geysermc.mcprotocollib.network.event.session.SessionAdapter
+import org.geysermc.mcprotocollib.network.packet.Packet
+import org.geysermc.mcprotocollib.network.tcp.TcpClientSession
+import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.ClientboundLoginPacket
+import org.geysermc.mcprotocollib.protocol.packet.ingame.clientbound.entity.player.ClientboundPlayerPositionPacket
+import org.geysermc.mcprotocollib.protocol.packet.ingame.serverbound.ServerboundChatPacket
+import org.geysermc.mcprotocollib.protocol.packet.ingame.serverbound.level.ServerboundAcceptTeleportationPacket
+import java.time.Instant
+import java.util.BitSet
+
+class MCBot(
+    private val content: String = "FancyBot喵~",
+    private val continueSendMessage: Boolean = false,
+    private val sendDelay: Long = 2000L,
+    private val client: TcpClientSession
+) : Runnable {
+
+    private fun sendMessage() =
+        client.send(ServerboundChatPacket(content, Instant.now().toEpochMilli(), 0L, null, 0, BitSet()))
+
+    override fun run() {
+        client.addListener(object : SessionAdapter() {
+            override fun packetReceived(session: Session, packet: Packet) {
+                if (packet is ClientboundLoginPacket) {
+                    if (continueSendMessage) {
+                        while (true) {
+                            try {
+                                sendMessage()
+                                Thread.sleep(sendDelay)
+                            } catch (_: InterruptedException) {
+                                Thread.currentThread().interrupt()
+                            }
+                        }
+                    } else {
+                        sendMessage()
+                    }
+                } else if (packet is ClientboundPlayerPositionPacket) {
+                    val p = packet
+                    client.send(ServerboundAcceptTeleportationPacket(p.teleportId));
+                }
+            }
+        })
+        client.connect()
+    }
+}

src/main/kotlin/cn/rtast/fancybot/util/mcbot/MCClient.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/10/17
+ */
+
+
+package cn.rtast.fancybot.util.mcbot
+
+import org.geysermc.mcprotocollib.network.tcp.TcpClientSession
+import org.geysermc.mcprotocollib.protocol.MinecraftProtocol
+
+class MCClient(
+    private val serverHost: String,
+    private val serverPort: Int,
+    private val botName: String
+) {
+    fun createClient(): TcpClientSession {
+        val protocol = MinecraftProtocol(botName)
+        val client = TcpClientSession(serverHost, serverPort, protocol)
+        return client
+    }
+}

src/main/kotlin/cn/rtast/fancybot/util/str/String.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/10/18
+ */
+
+
+package cn.rtast.fancybot.util.str
+
+import kotlin.random.Random
+
+fun generateRandomString(): String {
+    val allowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_"
+    val nameLength = Random.nextInt(3, 17)
+    return (1..nameLength)
+        .map { allowedChars.random() }
+        .joinToString("")
+}