chore: improve some command

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

@@ -24,6 +24,7 @@ import cn.rtast.fancybot.entity.enums.ImageType
 import cn.rtast.fancybot.entity.enums.WSType
 import cn.rtast.fancybot.items.BaisiItem
 import cn.rtast.fancybot.items.HeisiItem
+import cn.rtast.fancybot.items.NiuziItem
 import cn.rtast.fancybot.items.SetuItem
 import cn.rtast.fancybot.util.file.ConfigManager
 import cn.rtast.fancybot.util.file.NiuziBankManager
@@ -71,14 +72,13 @@ val itemManager = ItemManager()
 val niuziManager = NiuziManager()
 val niuziBankManager = NiuziBankManager()
 
-val items = listOf(
-    HeisiItem(),
-    BaisiItem(),
-    SetuItem()
-)
-
 val START_UP_TIME = Instant.now().epochSecond
 
+val items = listOf(
+    HeisiItem(), BaisiItem(), SetuItem(),
+    NiuziItem()
+)
+
 val commands = listOf(
     EchoCommand(), JrrpCommand(),
     NiuziRedeemCommand(), HitokotoCommand(),

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

@@ -8,10 +8,8 @@
 package cn.rtast.fancybot
 
 import cn.rtast.fancybot.commands.parse.*
-import cn.rtast.fancybot.entity.bili.CardShare
 import cn.rtast.fancybot.entity.enums.WSType
 import cn.rtast.fancybot.util.initDatabase
-import cn.rtast.fancybot.util.str.fromJson
 import cn.rtast.rob.ROneBotFactory
 import cn.rtast.rob.entity.*
 import cn.rtast.rob.entity.lagrange.FileEvent
@@ -40,6 +38,9 @@ class FancyBot : OneBotListener {
         val messageId = message.messageId
         println("$sender($senderId: $groupId >>> $messageId): $msg")
 
+        ReverseGIFCommand.callback(message)
+        AsciiArtCommand.callback(message)
+
         if (message.rawMessage.contains("原神")) {
             message.reply("你原神牛魔呢")
         }
@@ -49,9 +50,6 @@ class FancyBot : OneBotListener {
             calculateResult?.let { message.reply(calculateResult) }
         }
 
-        ReverseGIFCommand.callback(message)
-        AsciiArtCommand.callback(message)
-
         if (message.message.any { it.type == ArrayMessageType.reply }) {  // Image url parse
             val command = message.message.reversed().find { it.type == ArrayMessageType.text }!!.data.text!!
             val replyId = message.message.find { it.type == ArrayMessageType.reply }!!.data.id!!
@@ -61,6 +59,18 @@ class FancyBot : OneBotListener {
             }
         }
 
+        if (message.rawMessage.startsWith("https://github.com/") || message.rawMessage.startsWith("git@github.com:")) {
+            GitHubParseCommand.parse(this, message)
+        }
+
+        if (message.rawMessage.startsWith("BV") ||
+            message.rawMessage.startsWith("https://www.bilibili.com") ||
+            message.rawMessage.contains("https://b23.tv/") ||
+            message.message.find { it.type == ArrayMessageType.json } != null
+        ) {
+            BVParseCommand.parse(this, message)
+        }
+
         coroutineScope.launch {
             message.message.forEach {
                 if (it.type == ArrayMessageType.image) {
@@ -73,40 +83,6 @@ class FancyBot : OneBotListener {
                 }
             }
         }
-
-        if (message.rawMessage.startsWith("https://github.com/") || message.rawMessage.startsWith("git@github.com:")) {
-            GitHubParseCommand.parse(this, message)
-        }
-
-        if (message.rawMessage.startsWith("BV") ||
-            message.rawMessage.startsWith("https://www.bilibili.com") ||
-            message.rawMessage.contains("https://b23.tv/") ||
-            message.message.find { it.type == ArrayMessageType.json } != null
-        ) {
-            // parse bilibili video with a link, bvid or b23.tv link
-            val bvid = if (message.rawMessage.startsWith("BV")) {
-                message.rawMessage
-            } else if (message.rawMessage.split(" ").last().startsWith("https://b23.tv/")) {
-                val shortUrl = message.rawMessage.split(" ").last()
-                BVParseCommand.getShortUrlBVID(shortUrl)
-            } else if (message.message.find { it.type == ArrayMessageType.json } != null) {
-                val card = message.message.find { it.type == ArrayMessageType.json }!!
-                    .data.data!!.toString().fromJson<CardShare>()
-                val shortUrl = if (card.meta.detail == null) {
-                    if (!card.meta.news?.tag!!.contains("哔哩哔哩")) return
-                    card.meta.news.jumpUrl
-                } else {
-                    if (!card.meta.detail.title.contains("哔哩哔哩")) return
-                    card.meta.detail.qqDocUrl
-                }
-                BVParseCommand.getShortUrlBVID(shortUrl)
-            } else {
-                message.rawMessage.split("?").first()
-                    .split("/")
-                    .last { it.isNotEmpty() && it.isNotBlank() }
-            }
-            BVParseCommand.parse(this, bvid, message)
-        }
     }
 
     override suspend fun onGroupMessageRevoke(message: GroupRevokeMessage) {

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

@@ -19,8 +19,6 @@ class AboutCommand : BaseCommand() {
 
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
-            .addNewLine()
             .addText("Bot名称: FancyBot")
             .addNewLine()
             .addText("作者: RTAkland")
@@ -29,6 +27,6 @@ class AboutCommand : BaseCommand() {
             .addNewLine()
             .addText("项目地址: https://repo.rtast.cn/RTAkland/FancyBot")
             .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        message.reply(msg)
     }
 }

src/main/kotlin/cn/rtast/fancybot/commands/lookup/AICommand.kt

@@ -30,14 +30,13 @@ class AICommand : BaseCommand() {
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         if (args.isEmpty()) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
                 .addText("发送`/ai [模型] <问题>`即可询问AI哦~")
                 .addNewLine()
                 .addText("不指定模型默认为从配置文件中读取 >>>${openAIModel}")
                 .addNewLine()
                 .addText("发送`/ai list`可以获取可用的模型列表~")
                 .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            message.reply(msg)
             return
         }
 
@@ -48,12 +47,11 @@ class AICommand : BaseCommand() {
             )
             val modelsString = models.data.joinToString(", ") { it.id }
             val msg = MessageChain.Builder()
-                .addReply(message.messageId)
                 .addText("可用的模型列表如下: ")
                 .addNewLine()
                 .addText(modelsString)
                 .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            message.reply(msg)
             return
         }
 

src/main/kotlin/cn/rtast/fancybot/commands/lookup/CigaretteCommand.kt

@@ -27,13 +27,11 @@ class CigaretteCommand : BaseCommand() {
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         if (args.isEmpty()) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
-                .addNewLine()
                 .addText("发送/tobacco <名称> [数量] 来搜索结果哦~")
                 .addNewLine()
                 .addText("最多只能显示出10条结果哦, 不指定数量的话默认是3条~")
                 .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            message.reply(msg)
             return
         }
         val limit = if (args.size == 1) 3 else if (args.last().toInt() > 10) 3 else args.last().toInt()

src/main/kotlin/cn/rtast/fancybot/commands/lookup/DomainPriceCommand.kt

@@ -24,7 +24,7 @@ import java.awt.image.BufferedImage
 
 @CommandDescription("查询域名价格")
 class DomainPriceCommand : BaseCommand() {
-    override val commandNames = listOf("/domain")
+    override val commandNames = listOf("/domain", "/dp")
 
     private val canvasWidth = 400
     private val canvasHeight = 300
@@ -80,10 +80,9 @@ class DomainPriceCommand : BaseCommand() {
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         if (args.isEmpty()) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
                 .addText("发送`/domain <域名>`即可查询对应的注册和续费价格~")
                 .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            message.reply(msg)
             return
         }
         val suffix = args.first()
@@ -103,10 +102,7 @@ class DomainPriceCommand : BaseCommand() {
             } else {
                 this.createDomainPriceCard(suffix, response.realPrice to response.price)
             }
-        val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
-            .addImage(cardImage, true)
-            .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        val msg = MessageChain.Builder().addImage(cardImage, true).build()
+        message.reply(msg)
     }
 }

src/main/kotlin/cn/rtast/fancybot/commands/lookup/GithubUserCommand.kt

@@ -69,11 +69,8 @@ class GithubUserCommand : BaseCommand() {
 
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         if (args.isEmpty()) {
-            val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
-                .addText("发送`gh <用户名>`即可查询用户的信息~")
-                .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            val msg = MessageChain.Builder().addText("发送`gh <用户名>`即可查询用户的信息~").build()
+            message.reply(msg)
             return
         }
         val username = args.first()
@@ -82,10 +79,7 @@ class GithubUserCommand : BaseCommand() {
             headers = mapOf("Authorization" to configManager.githubKey)
         )
         val image = this.createUserInfoCard(userInfo)
-        val msg = MessageChain.Builder()
-            .addReply(message.messageId)
-            .addImage(image, true)
-            .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        val msg = MessageChain.Builder().addImage(image, true).build()
+        message.reply(msg)
     }
 }

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

@@ -24,13 +24,11 @@ class MCPingCommand : BaseCommand() {
     override suspend fun executeGroup(listener: OneBotListener, 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] [java|be]")
                 .addNewLine()
                 .addText("不添加平台默认Java版~")
                 .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            message.reply(msg)
             return
         }
         val platform = if (args.size == 2) args.last() else "java"

src/main/kotlin/cn/rtast/fancybot/commands/lookup/NslookupCommand.kt

@@ -25,11 +25,10 @@ class NslookupCommand : BaseCommand() {
         val host = args.joinToString(" ")
         try {
             val msg = MessageChain.Builder()
-                .addReply(message.messageId)
                 .addText("域名: ${host}解析后的IP地址为: ")
                 .addText(withContext(Dispatchers.IO) { InetAddress.getByName(host) }.hostAddress)
                 .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            message.reply(msg)
         } catch (_: UnknownHostException) {
             message.reply("未知的主机名: $host")
         } catch (e: Exception) {

src/main/kotlin/cn/rtast/fancybot/commands/lookup/PixivCommand.kt

@@ -14,6 +14,7 @@ import cn.rtast.fancybot.util.str.encodeToBase64
 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.NodeMessageChain
 import cn.rtast.rob.util.ob.OneBotListener
 import java.net.URI
 
@@ -27,30 +28,35 @@ class PixivCommand : BaseCommand() {
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         if (args.isEmpty()) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
-                .addText("发送/pixiv <id> | rank 来进行操作哦~")
+                .addText("发送`/pixiv <id> | rank` 来进行操作哦~")
                 .build()
-            listener.sendGroupMessage(message.groupId, msg)
+            message.reply(msg)
             return
         }
         when (val keyword = args.first()) {
             "rank", "排名", "r" -> {
-                val msg = MessageChain.Builder()
-                    .addAt(message.sender.userId)
-                    .addText("今日Pixiv Ranking~")
-                    .addNewLine()
-
+                val node = NodeMessageChain.Builder()
+                    .addMessageChain(
+                        MessageChain.Builder().addText("今日Pixiv Ranking~").build(),
+                        message.sender.userId
+                    )
                 val result = Http.get<Ranking>(pixivRankingURL)
                 result.contents.asSequence().take(5).forEach {
                     try {
+                        val msg = MessageChain.Builder()
                         val imageBase64 = URI(it.getOriginUrl()).toURL().readBytes().encodeToBase64()
-                        msg.addText(it.title)
-                            .addImage(imageBase64, true)
+                        msg.addImage(imageBase64, true)
+                            .addText("标题: ${it.title}")
                             .addNewLine()
+                            .addText("用户: ${it.userName}(${it.userId}) | 作品ID: ${it.illustId}")
+                            .addNewLine()
+                            .addText("日期: ${it.date}")
+                        node.addMessageChain(msg.build(), message.sender.userId)
                     } catch (_: Exception) {
                     }
                 }
-                listener.sendGroupMessage(message.groupId, msg.build())
+                node.addMessageChain(MessageChain.Builder().addText("图片来源: Pixiv").build(), message.sender.userId)
+                message.reply(node.build())
                 return
             }
 
@@ -58,19 +64,14 @@ class PixivCommand : BaseCommand() {
                 try {
                     val id = keyword.toLong()
                     val imageBase64 = URI("$imageProxyURL/$id.png").toURL().readBytes().encodeToBase64()
-                    println(imageBase64)
                     val msg = MessageChain.Builder()
-                        .addAt(message.sender.userId)
-                        .addText("来咯~ 你要的图片~~~")
                         .addImage(imageBase64, true)
+                        .addText("图片来源: Pixiv")
                         .build()
-                    listener.sendGroupMessage(message.groupId, msg)
+                    message.reply(msg)
                 } catch (_: Exception) {
-                    val msg = MessageChain.Builder()
-                        .addAt(message.sender.userId)
-                        .addText("输入错误~检查一下有没有输错吧~")
-                        .build()
-                    listener.sendGroupMessage(message.groupId, msg)
+                    val msg = MessageChain.Builder().addText("输入错误~检查一下有没有输错吧~").build()
+                    message.reply(msg)
                 }
             }
         }

src/main/kotlin/cn/rtast/fancybot/commands/lookup/QRCodeCommand.kt

@@ -20,9 +20,8 @@ class QRCodeCommand : BaseCommand() {
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         val content = args.joinToString(" ")
         val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
             .addImage("https://api.rtast.cn/api/generate_qr?data=$content")
             .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        message.reply(msg)
     }
 }

src/main/kotlin/cn/rtast/fancybot/commands/niuzi/NiuziRedeemCommand.kt

@@ -22,7 +22,7 @@ class NiuziRedeemCommand : BaseCommand() {
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         if (args.isEmpty()) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
+                .addReply(message.messageId)
                 .addText("发送 /rdm <物品名称> 即可兑换哦!")
                 .addNewLine()
                 .addText("发送 /rdm list 即可查看所有可兑换的物品~")
@@ -35,7 +35,7 @@ class NiuziRedeemCommand : BaseCommand() {
         val status = niuziManager.getUser(message.sender.userId)
         if (status == null) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
+                .addReply(message.messageId)
                 .addText("你还没有签到过呢要签到一次才能兑换哦~")
                 .build()
             listener.sendGroupMessage(message.groupId, msg)
@@ -44,19 +44,15 @@ class NiuziRedeemCommand : BaseCommand() {
         val item = args.first()
         if (item == "list" || item == "列表") {
             val priceTable =
-                itemManager.items.joinToString("\n") { "[${it.itemNames.joinToString("|")}]:${it.itemPrice}积分" }
-            val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
-                .addNewLine()
-                .addText(priceTable)
-                .build()
-            listener.sendGroupMessage(message.groupId, msg)
+                itemManager.items.joinToString("\n")
+                { "[${it.itemNames.joinToString("|")}]:${it.itemPrice}cm" }
+            message.reply(priceTable)
             return
         }
         val selectedItem = itemManager.items.find { it.itemNames.any { any -> any == item } }
         if (selectedItem == null) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
+                .addReply(message.messageId)
                 .addText("没有找到你想兑换的东西呢")
                 .addNewLine()
                 .addText("你可以发送 /rdm list来查看所有可兑换的物品")
@@ -67,7 +63,7 @@ class NiuziRedeemCommand : BaseCommand() {
         val selectedItemPrice = selectedItem.itemPrice
         if (selectedItemPrice > status.length) {
             val msg = MessageChain.Builder()
-                .addAt(message.sender.userId)
+                .addReply(message.messageId)
                 .addText("你的牛子长度不够兑换这个物品呢~")
                 .addNewLine()
                 .addText("你有: ${status.length}cm, 兑换需要: $selectedItemPrice cm~\"")
@@ -77,7 +73,7 @@ class NiuziRedeemCommand : BaseCommand() {
         }
         val afterStatus = niuziManager.redeemItem(message.sender.userId, selectedItemPrice)?.length!!
         val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
+            .addReply(message.messageId)
             .addText("兑换成功正在发送奖品中~")
             .addNewLine()
             .addText("你花费了${selectedItemPrice}cm来兑换奖品, 还剩${afterStatus}cm")

src/main/kotlin/cn/rtast/fancybot/commands/parse/BVParseCommand.kt

@@ -7,18 +7,17 @@
 
 package cn.rtast.fancybot.commands.parse
 
-import cn.rtast.fancybot.entity.bili.ShortUrl
-import cn.rtast.fancybot.entity.bili.UserStat
-import cn.rtast.fancybot.entity.bili.VideoStat
-import cn.rtast.fancybot.entity.bili.ViewCount
+import cn.rtast.fancybot.entity.bili.*
 import cn.rtast.fancybot.util.Http
 import cn.rtast.fancybot.util.Resources
 import cn.rtast.fancybot.util.drawCustomImage
 import cn.rtast.fancybot.util.str.encodeToBase64
 import cn.rtast.fancybot.util.str.formatNumber
+import cn.rtast.fancybot.util.str.fromJson
 import cn.rtast.fancybot.util.str.setTruncate
 import cn.rtast.fancybot.util.toByteArray
 import cn.rtast.rob.entity.GroupMessage
+import cn.rtast.rob.enums.ArrayMessageType
 import cn.rtast.rob.util.ob.MessageChain
 import cn.rtast.rob.util.ob.OneBotListener
 import okhttp3.OkHttpClient
@@ -150,7 +149,29 @@ object BVParseCommand {
         }
     }
 
-    suspend fun parse(listener: OneBotListener, bvid: String, message: GroupMessage) {
+    suspend fun parse(listener: OneBotListener, message: GroupMessage) {
+        // parse bilibili video with a link, bvid or b23.tv link
+        val bvid = if (message.rawMessage.startsWith("BV")) {
+            message.rawMessage
+        } else if (message.rawMessage.split(" ").last().startsWith("https://b23.tv/")) {
+            val shortUrl = message.rawMessage.split(" ").last()
+            BVParseCommand.getShortUrlBVID(shortUrl)
+        } else if (message.message.find { it.type == ArrayMessageType.json } != null) {
+            val card = message.message.find { it.type == ArrayMessageType.json }!!
+                .data.data!!.toString().fromJson<CardShare>()
+            val shortUrl = if (card.meta.detail == null) {
+                if (!card.meta.news?.tag!!.contains("哔哩哔哩")) return
+                card.meta.news.jumpUrl
+            } else {
+                if (!card.meta.detail.title.contains("哔哩哔哩")) return
+                card.meta.detail.qqDocUrl
+            }
+            BVParseCommand.getShortUrlBVID(shortUrl)
+        } else {
+            message.rawMessage.split("?").first()
+                .split("/")
+                .last { it.isNotEmpty() && it.isNotBlank() }
+        }
         val videoInfo = this.getVideoStat(bvid)
         val viewCount = this.getViewCount(bvid, videoInfo.data.cid)
         val shortUrl = this.generateShortUrl(bvid, videoInfo.data.aid)

src/main/kotlin/cn/rtast/fancybot/entity/pixiv/Ranking.kt

@@ -7,16 +7,25 @@
 
 package cn.rtast.fancybot.entity.pixiv
 
+import com.google.gson.annotations.SerializedName
+
 data class Ranking(
     val contents: List<Content>
 ) {
     data class Content(
         val title: String,
         val tags: List<String>,
-        val url: String
+        val url: String,
+        @SerializedName("user_name")
+        val userName: String,
+        @SerializedName("user_id")
+        val userId: Long,
+        @SerializedName("illust_id")
+        val illustId: Long,
+        val date: String,
     ) {
         fun getOriginUrl(): String {
-            return url.replace("https://i.pximg.net", "https://proxy.rtast.cn/https/pixiv.microyu.workers.dev")
+            return url.replace("https://i.pximg.net", "https://i.pixiv.re")
                 .replace("/c/240x480/img-master/", "/img-original/")
                 .replace("_master1200", "")
         }

src/main/kotlin/cn/rtast/fancybot/items/BaisiItem.kt

@@ -20,10 +20,7 @@ class BaisiItem : Item() {
 
     override suspend fun redeemInGroup(listener: OneBotListener, message: GroupMessage, after: Double) {
         val url = Http.get<Baisi>("https://v2.api-m.com/api/baisi").data
-        val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
-            .addImage(url)
-            .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        val msg = MessageChain.Builder().addImage(url).build()
+        message.reply(msg)
     }
 }

src/main/kotlin/cn/rtast/fancybot/items/HeisiItem.kt

@@ -20,10 +20,7 @@ class HeisiItem : Item() {
 
     override suspend fun redeemInGroup(listener: OneBotListener, message: GroupMessage, after: Double) {
         val url = Http.get<Baisi>("https://v2.api-m.com/api/heisi").data
-        val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
-            .addImage(url)
-            .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        val msg = MessageChain.Builder().addImage(url).build()
+        message.reply(msg)
     }
 }

src/main/kotlin/cn/rtast/fancybot/items/NiuziItem.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/9/27
+ */
+
+
+package cn.rtast.fancybot.items
+
+import cn.rtast.fancybot.niuziManager
+import cn.rtast.fancybot.util.item.Item
+import cn.rtast.rob.entity.GroupMessage
+import cn.rtast.rob.util.ob.MessageChain
+import cn.rtast.rob.util.ob.OneBotListener
+
+class NiuziItem : Item() {
+    override val itemNames = listOf("牛子", "nz", "niuzi")
+    override val itemPrice = 10.0
+
+    override suspend fun redeemInGroup(listener: OneBotListener, message: GroupMessage, after: Double) {
+        val before = niuziManager.getUser(message.sender.userId)!!
+        val afterNiuzi = niuziManager.updateLength(message.sender.userId, -2.0)!!
+        val msg = MessageChain.Builder()
+            .addText("你的牛子到账啦, 你的牛子现在有${afterNiuzi.length}cm长呢!")
+            .addNewLine()
+            .addText("(之前的长度是${before.length}cm!)")
+            .build()
+        message.reply(msg)
+    }
+}

src/main/kotlin/cn/rtast/fancybot/items/SetuItem.kt

@@ -31,10 +31,7 @@ class SetuItem : Item() {
             return
         }
         val imageBase64 = URI(response.urls.large).toURL().readBytes().encodeToBase64()
-        val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
-            .addImage(imageBase64, true)
-            .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        val msg = MessageChain.Builder().addImage(imageBase64, true).build()
+        message.reply(msg)
     }
 }