Add back math command

commands/num-edit/math.js

@@ -0,0 +1,30 @@
+const { Command } = require('discord.js-commando');
+const math = require('mathjs');
+
+module.exports = class MathCommand extends Command {
+	constructor(client) {
+		super(client, {
+			name: 'math',
+			aliases: ['calculator', 'calc'],
+			group: 'num-edit',
+			memberName: 'math',
+			description: 'Evaluates math expressions.',
+			args: [
+				{
+					key: 'expression',
+					prompt: 'What expression would you like to evaluate?',
+					type: 'string'
+				}
+			]
+		});
+	}
+
+	run(msg, { expression }) {
+		try {
+			const answer = math.eval(expression).toString();
+			return msg.say(answer).catch(() => msg.reply('Invalid expression.'));
+		} catch (err) {
+			return msg.reply('Invalid expression.');
+		}
+	}
+};

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "xiaobot",
-	"version": "51.0.2",
+	"version": "51.1.0",
 	"description": "Your personal server companion.",
 	"main": "XiaoBot.js",
 	"scripts": {
@@ -37,6 +37,7 @@
 		"discord.js": "github:hydrabolt/discord.js",
 		"discord.js-commando": "github:gawdl3y/discord.js-commando",
 		"erlpack": "github:discordapp/erlpack",
+		"mathjs": "^3.16.5",
 		"node-opus": "^0.2.7",
 		"snekfetch": "^3.5.8",
 		"uws": "^8.14.1",