feat: add mcping and help command

src/main/kotlin/cn/rtast/fancybot/commands/HelpCommand.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/9/3
+ */
+
+
+package cn.rtast.fancybot.commands
+
+import cn.rtast.fancybot.commands
+import cn.rtast.rob.entity.GroupMessage
+import cn.rtast.rob.util.BaseCommand
+import cn.rtast.rob.util.ob.MessageChain
+import cn.rtast.rob.util.ob.OBMessage
+
+class HelpCommand : BaseCommand() {
+    override val commandNames = listOf("/help", "/帮助")
+
+    override suspend fun executeGroup(listener: OBMessage, message: GroupMessage, args: List<String>) {
+        val allCommands = commands.joinToString("\n") {
+            "[${it.javaClass.name.split(".").last().replace("Command", "")}] 命令:${it.commandNames.joinToString(",")}"
+        }
+        val msg = MessageChain.Builder()
+            .addAt(message.sender.userId)
+            .addNewLine()
+            .addText(allCommands)
+            .build()
+        listener.sendGroupMessage(message.groupId, msg)
+    }
+}

src/main/kotlin/cn/rtast/fancybot/commands/MCPingCommand.kt

@@ -0,0 +1,69 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/9/3
+ */
+
+
+package cn.rtast.fancybot.commands
+
+import cn.rtast.fancybot.entity.MCPingResponse
+import cn.rtast.fancybot.util.fromJson
+import cn.rtast.motdpinger.MotdPinger
+import cn.rtast.rob.entity.GroupMessage
+import cn.rtast.rob.util.BaseCommand
+import cn.rtast.rob.util.ob.MessageChain
+import cn.rtast.rob.util.ob.OBMessage
+
+class MCPingCommand : BaseCommand() {
+    override val commandNames = listOf("/mcping", "/mcPing")
+
+    private val pingInstance = MotdPinger()
+
+    override suspend fun executeGroup(listener: OBMessage, message: GroupMessage, args: List<String>) {
+        if (args.isEmpty()) {
+            val msg = MessageChain.Builder()
+                .addAt(message.sender.userId)
+                .addNewLine()
+                .addText("使用方法: /mcping <host>:[port]")
+                .addNewLine()
+                .addText("仅限Java版服务器哦~")
+                .build()
+            listener.sendGroupMessage(message.groupId, msg)
+            return
+        }
+        val parts = args.first().split(":")
+        val host: String
+        val port: Int
+        if (parts.size == 2) {
+            host = parts[0]
+            port = parts[1].toIntOrNull() ?: 25565
+        } else {
+            host = args.first()
+            port = 25565
+        }
+        try {
+            val rawResponse = pingInstance.pingServer(host, port)
+            val jsonResponse = rawResponse?.fromJson<MCPingResponse>()!!
+            val msg = MessageChain.Builder()
+                .addAt(message.sender.userId)
+                .addNewLine()
+                .addImage(jsonResponse.favicon, true)
+                .addText("服务器地址: $host:$port")
+                .addNewLine()
+                .addText("协议版本号: ${jsonResponse.version.protocol}/${jsonResponse.version.name}")
+                .addNewLine()
+                .addText("玩家: ${jsonResponse.players.online}/${jsonResponse.players.max}")
+                .build()
+            listener.sendGroupMessage(message.groupId, msg)
+        } catch (_: Exception) {
+            val msg = MessageChain.Builder()
+                .addAt(message.sender.userId)
+                .addText("ping失败~")
+                .addNewLine()
+                .addText("检查一下地址或者端口是否正确吧~")
+                .build()
+            listener.sendGroupMessage(message.groupId, msg)
+        }
+    }
+}