feat: add caculate parse

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

@@ -35,6 +35,7 @@ import cn.rtast.fancybot.commands.misc.UnsetZiBiCommand
 import cn.rtast.fancybot.commands.misc.ZiBiCommand
 import cn.rtast.fancybot.commands.parse.AsciiArtCommand
 import cn.rtast.fancybot.commands.parse.BVParseCommand
+import cn.rtast.fancybot.commands.parse.CalculateCommand
 import cn.rtast.fancybot.commands.parse.GitHubParseCommand
 import cn.rtast.fancybot.commands.parse.ImageURLCommand
 import cn.rtast.fancybot.commands.parse.ReverseGIFCommand
@@ -85,9 +86,8 @@ class FancyBot : OneBotListener {
         val messageId = message.messageId
         println("$sender($senderId: $groupId >>> $messageId): $msg")
 
-        if (message.rawMessage.contains("1+1")) {
-            message.reply("1+1=2")
-        }
+        val calculateResult = CalculateCommand.parse(message.rawMessage)
+        calculateResult?.let { message.reply(calculateResult) }
 
         coroutineScope.launch {
             message.message.forEach {
@@ -190,16 +190,6 @@ class FancyBot : OneBotListener {
             .build()
         this.sendGroupMessage(groupId, msg)
     }
-
-    override suspend fun onPrivateMessage(message: PrivateMessage, json: String) {
-        if (message.rawMessage.contains("1+1")) {
-            message.reply("1+1=2")
-        }
-
-        if (message.rawMessage == "ping") {
-            message.reply("pong")
-        }
-    }
 }
 
 val configManager = ConfigManager()

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

@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/9/21
+ */
+
+
+package cn.rtast.fancybot.commands.parse
+
+import javax.script.ScriptEngineManager
+import javax.script.ScriptException
+
+object CalculateCommand {
+
+    private val engine = ScriptEngineManager().getEngineByName("JavaScript")
+
+    fun parse(input: String): String? {
+        return try {
+            engine.eval(input)
+        } catch (_: ScriptException) {
+            "Invalid expression"
+            return null
+        }.toString()
+    }
+}