feat(gateway:listeners): Add auto message deletion

2 files changed, 75 insertions, 0 deletions

diff --git a/packages/gateway/src/listeners/autoDeletion.ts b/packages/gateway/src/listeners/autoDeletion.ts
new file mode 100644
index 0000000..bf503e1
--- /dev/null
+++ b/packages/gateway/src/listeners/autoDeletion.ts
@@ -0,0 +1,73 @@
+import { Client, Events, Message } from "discord.js";
+import { CENTRAL_GUILD_ID, ROLEPLAY_GUILD_ID } from "../constants";
+import { logUnexpectedDiscordAPIError } from "../utilities";
+
+const BANNED_STRINGS = ["@https://cdn.miki.bot/ext/imgh/1dGU5ggsHZ.gif"];
+
+const containsBannedString = (message: Message): boolean => {
+  const content = message.content.toLowerCase();
+
+  for (const bannedString of BANNED_STRINGS)
+    if (content.includes(bannedString.toLowerCase())) return true;
+
+  for (const embed of message.embeds)
+    for (const bannedString of BANNED_STRINGS) {
+      if (
+        embed.title &&
+        embed.title.toLowerCase().includes(bannedString.toLowerCase())
+      )
+        return true;
+
+      if (
+        embed.description &&
+        embed.description.toLowerCase().includes(bannedString.toLowerCase())
+      )
+        return true;
+
+      for (const field of embed.fields) {
+        if (
+          field.name &&
+          field.name.toLowerCase().includes(bannedString.toLowerCase())
+        )
+          return true;
+
+        if (
+          field.value &&
+          field.value.toLowerCase().includes(bannedString.toLowerCase())
+        )
+          return true;
+      }
+
+      if (
+        embed.footer?.text &&
+        embed.footer.text.toLowerCase().includes(bannedString.toLowerCase())
+      )
+        return true;
+
+      if (
+        embed.author?.name &&
+        embed.author.name.toLowerCase().includes(bannedString.toLowerCase())
+      )
+        return true;
+    }
+
+  return false;
+};
+
+export const handleAutoDeletion = (client: Client) => {
+  client.on(Events.MessageCreate, async (message: Message) => {
+    if (
+      message.guildId !== CENTRAL_GUILD_ID &&
+      message.guildId !== ROLEPLAY_GUILD_ID
+    )
+      return;
+
+    if (!containsBannedString(message)) return;
+
+    try {
+      await message.delete();
+    } catch (error) {
+      logUnexpectedDiscordAPIError(error);
+    }
+  });
+};
diff --git a/packages/gateway/src/listeners/index.ts b/packages/gateway/src/listeners/index.ts
index 76ffb42..7547d4f 100644
--- a/packages/gateway/src/listeners/index.ts
+++ b/packages/gateway/src/listeners/index.ts
@@ -7,6 +7,7 @@ import { handleMessageEdit } from "./messageEdit";
 import { handleClientReady } from "./clientReady";
 import { handleMemberJoin } from "./memberJoin";
 import { handleTimeoutMirroring } from "./timeoutMirroring";
+import { handleAutoDeletion } from "./autoDeletion";
 // import { handleMediaModeration } from "./mediaModeration";
 
 export const handleListeners = (client: Client) => {
@@ -18,5 +19,6 @@ export const handleListeners = (client: Client) => {
   handleMessageEdit(client);
   handleMemberJoin(client);
   handleTimeoutMirroring(client);
+  handleAutoDeletion(client);
   // handleMediaModeration(client);
 };