feat: add mc bot command

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("")
+}