chore: improve some command

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)
+    }
+}