Feat: clean dyno moderation messages

src/events/clean-moderation-messages/index.ts

@@ -0,0 +1,22 @@
+import { Events } from "discord.js";
+import { isDynoModerationMessage, isMessageInAPublicChannel } from "../../utils/messages.js";
+import { createEvent } from "../helpers.js";
+
+const DYNO_ID = "155149108183695360";
+
+export const cleanModerationMessagesEvent = createEvent(
+  {
+    name: Events.MessageCreate,
+  },
+  async (message) => {
+    const isDynoMessage = message.author.bot && message.author.id === DYNO_ID;
+
+    if (isDynoMessage && isMessageInAPublicChannel(message) && isDynoModerationMessage(message)) {
+      try {
+        await message.delete();
+      } catch (error) {
+        console.error("Failed to delete message:", error);
+      }
+    }
+  }
+);

src/events/index.ts

@@ -1,6 +1,12 @@
+import { cleanModerationMessagesEvent } from "./clean-moderation-messages/index.js";
 import { interactionCreateEvent } from "./interaction-create/index.js";
 import { readyEvent } from "./ready/index.js";
 import { spamDetection } from "./spam-detection/index.js";
 import type { DiscordEvent } from "./types.js";
 
-export const events: DiscordEvent[] = [readyEvent, interactionCreateEvent, spamDetection];
+export const events: DiscordEvent[] = [
+  readyEvent,
+  interactionCreateEvent,
+  spamDetection,
+  cleanModerationMessagesEvent,
+];

src/utils/messages.ts

@@ -1,4 +1,4 @@
-import { type Message, MessageType, type PartialMessage } from "discord.js";
+import { type Message, MessageType, type PartialMessage, PermissionFlagsBits } from "discord.js";
 
 export type GuildMessage = Message<true>;
 
@@ -44,3 +44,31 @@ const normalizeText = (text: string) => {
     .split(/\s+/)
     .filter(Boolean);
 };
+
+export const isDynoModerationMessage = (message: Message) => {
+  const phrases = [
+    "was banned",
+    "was unbanned",
+    "was kicked",
+    "was muted",
+    "was unmuted",
+    "has been warned",
+  ];
+  return phrases.some((phrase) =>
+    message.embeds.some((embed) => embed.description?.includes(phrase))
+  );
+};
+
+/**
+ * Checks if the message is in a channel where `@everyone` has permission to view
+ * @param message
+ * @returns true if the message is in a public channel, false otherwise
+ */
+export const isMessageInAPublicChannel = (message: Message | PartialMessage) => {
+  return (
+    message.inGuild() &&
+    message.channel
+      .permissionsFor(message.guild.roles.everyone)
+      .has(PermissionFlagsBits.ViewChannel)
+  );
+};