feat: nickcname moderation

src/listeners/index.ts

@@ -1,3 +1,4 @@
 import "./ready.ts";
 import "./interaction_create.ts";
 import "./message_create.ts";
+import "./nickname_moderation.ts";

src/listeners/nickname_moderation.ts

@@ -0,0 +1,25 @@
+import { Events, GuildMember } from "discord.js";
+import { defineListener } from "../loaders/listeners.ts";
+import { silently } from "../util.ts";
+
+defineListener({
+  event: Events.GuildMemberAdd,
+  run: (member: GuildMember) => moderateNick(member)
+});
+
+defineListener({
+  event: Events.GuildMemberUpdate,
+  run: (_: GuildMember, newMember: GuildMember) => moderateNick(newMember)
+});
+
+async function moderateNick(member: GuildMember) {
+  const name = member.displayName;
+  const normalizedName = name.normalize("NFKC").replace(/^[!$#@%^`&*()]+/, "");
+
+  if (name !== normalizedName) {
+    silently(member.edit({
+      nick: normalizedName,
+      reason: "lame username"
+    }));
+  }
+}

src/util.ts

@@ -1,3 +1,9 @@
 export function safeSlice<T>(array: T[], length: number) {
   return array.length > length ? array.slice(0, length) : array;
 }
+
+export async function silently<T>(value: Promise<T>) {
+  try {
+    await value;
+  } catch {}
+}