Wait for main and inbox guilds to become available before initializing the bot

src/main.js

@@ -29,12 +29,48 @@ const alert = require('./modules/alert');
 
 const {ACCIDENTAL_THREAD_MESSAGES} = require('./data/constants');
 
-// Once the bot has connected, set the status/"playing" message
-bot.on('ready', () => {
-  bot.editStatus(null, {name: config.status});
-  console.log('Connected! Now listening to DMs.');
+module.exports = {
+  async start() {
+    console.log('Connecting to Discord...');
+
+    bot.once('ready', async () => {
+      console.log('Connected, waiting for guilds to become available');
+      await Promise.all([
+        ...config.mainGuildId.map(id => waitForGuild(id)),
+        waitForGuild(config.mailGuildId)
+      ]);
+
+      console.log('Initializing');
+      initStatus();
+      initBaseMessageHandlers();
+      initPlugins();
+
+      console.log('Done! Now listening to DMs.');
     });
 
+    bot.connect();
+  }
+};
+
+function waitForGuild(guildId) {
+  if (bot.guilds.has(guildId)) {
+    return Promise.resolve();
+  }
+
+  return new Promise(resolve => {
+    bot.on('guildAvailable', guild => {
+      if (guild.id === guildId) {
+        resolve();
+      }
+    });
+  });
+}
+
+function initStatus() {
+  bot.editStatus(null, {name: config.status});
+}
+
+function initBaseMessageHandlers() {
   /**
    * When a moderator posts in a modmail thread...
    * 1) If alwaysReply is enabled, reply to the user
@@ -181,9 +217,9 @@ bot.on('messageCreate', async msg => {
       bot.createMessage(msg.channel.id, config.botMentionResponse.replace(/{userMention}/g, `<@${msg.author.id}>`));
     }
   });
+}
 
-module.exports = {
-  async start() {
+function initPlugins() {
   // Initialize command manager
   const commands = createCommandManager(bot);
 
@@ -194,8 +230,8 @@ module.exports = {
     }
   }
 
-    // Load modules
-    console.log('Loading plugins...');
+  // Load plugins
+  console.log('Loading plugins');
   const builtInPlugins = [
     reply,
     close,
@@ -231,9 +267,4 @@ module.exports = {
   if (config.updateNotifications) {
     updates.startVersionRefreshLoop();
   }
-
-    // Connect to Discord
-    console.log('Connecting to Discord...');
-    await bot.connect();
 }
-};