Rewrite the bot process in Node/Discord.js (#206)

* Rewrite the bot process in js using discord.js

* remove old go code

packages/bot/bot.js

@@ -0,0 +1,27 @@
+const { Client } = require('discord.js');
+
+const botToken = process.env['BOT_TOKEN'];
+const allowedBots = process.env['ALLOWED_BOTS']?.split(',') ?? [];
+const appUrl = process.env['UI_PUBLIC_URI'] ?? '';
+
+function messageEventListener(message) {
+  const { author, channel, client, guild, mentions } = message;
+
+  if (!guild) {
+    return;
+  } // Ignore DMs
+  if (client.user && !mentions.has(client.user.id)) {
+    return;
+  } // Ignore non bot mentions
+
+  if (author.bot && !allowedBots.includes(author.id)) {
+    return;
+  } // Only respond to allowed bots
+
+  const guildId = guild.id;
+  channel.send(`:beginner: Assign your roles here! ${appUrl}/s/${guildId}`);
+}
+
+const client = new Client();
+client.on('message', (message) => messageEventListener(message));
+client.login(botToken);

packages/bot/index.js

@@ -0,0 +1,9 @@
+const path = require('path');
+require('dotenv').config({ path: path.resolve(__dirname, '../../.env') });
+
+const { ShardingManager } = require('discord.js');
+
+const botToken = process.env['BOT_TOKEN'];
+
+const manager = new ShardingManager('./bot.js', { token: botToken });
+manager.spawn();

packages/bot/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "@roleypoly/bot",
+  "version": "0.1.0",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "discord.js": "^12.5.1"
+  }
+}