feat: profanity censoring and filtering

package.json

@@ -11,6 +11,7 @@
 		"postinstall": "prisma generate"
 	},
 	"dependencies": {
+		"@2toad/profanity": "^3.1.1",
 		"@auth/prisma-adapter": "2.7.2",
 		"@bprogress/next": "^3.2.11",
 		"@hello-pangea/dnd": "^18.0.1",

pnpm-lock.yaml

@@ -8,6 +8,9 @@ importers:
 
   .:
     dependencies:
+      '@2toad/profanity':
+        specifier: ^3.1.1
+        version: 3.1.1
       '@auth/prisma-adapter':
         specifier: 2.7.2
         version: 2.7.2(@prisma/client@6.6.0(prisma@6.6.0(typescript@5.8.3))(typescript@5.8.3))
@@ -108,6 +111,10 @@ importers:
 
 packages:
 
+  '@2toad/profanity@3.1.1':
+    resolution: {integrity: sha512-07ny4pCSa4gDrcJ4vZ/WWmiM90+8kv/clXfnDvThf9IJq0GldpjRVdzHCfMwGDs2Y/8eClmTGzKb5tEfUWy/uA==}
+    engines: {node: '>=12'}
+
   '@alloc/quick-lru@5.2.0':
     resolution: {integrity: sha512-UrcABB+4bUrFABwbluTIBErXwvbsU/V7TZWfmbgJfbkwiBuziS9gxdODUyuiecfdGQ85jglMW6juS3+z5TsKLw==}
     engines: {node: '>=10'}
@@ -2301,6 +2308,8 @@ packages:
 
 snapshots:
 
+  '@2toad/profanity@3.1.1': {}
+
   '@alloc/quick-lru@5.2.0': {}
 
   '@auth/core@0.37.2':

src/app/api/auth/display-name/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import { profanity } from "@2toad/profanity";
 
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
@@ -14,6 +15,9 @@ export async function PATCH(request: NextRequest) {
 	const validation = displayNameSchema.safeParse(displayName);
 	if (!validation.success) return NextResponse.json({ error: validation.error.errors[0].message }, { status: 400 });
 
+	// Check for inappropriate words
+	if (profanity.exists(displayName)) return NextResponse.json({ error: "Display name contains inappropriate words" }, { status: 400 });
+
 	try {
 		await prisma.user.update({
 			where: { email: session.user?.email ?? undefined },

src/app/api/auth/username/route.ts

@@ -1,9 +1,11 @@
 import { NextRequest, NextResponse } from "next/server";
 
+import dayjs from "dayjs";
+import { profanity } from "@2toad/profanity";
+
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
 import { usernameSchema } from "@/lib/schemas";
-import dayjs from "dayjs";
 
 export async function PATCH(request: NextRequest) {
 	const session = await auth();
@@ -24,6 +26,9 @@ export async function PATCH(request: NextRequest) {
 	const validation = usernameSchema.safeParse(username);
 	if (!validation.success) return NextResponse.json({ error: validation.error.errors[0].message }, { status: 400 });
 
+	// Check for inappropriate words
+	if (profanity.exists(username)) return NextResponse.json({ error: "Username contains inappropriate words" }, { status: 400 });
+
 	const existingUser = await prisma.user.findUnique({ where: { username } });
 	if (existingUser) return NextResponse.json({ error: "Username is already taken" }, { status: 400 });
 

src/app/api/mii/[id]/edit/route.ts

@@ -6,6 +6,8 @@ import fs from "fs/promises";
 import path from "path";
 import sharp from "sharp";
 
+import { profanity } from "@2toad/profanity";
+
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
 import { idSchema, nameSchema, tagsSchema } from "@/lib/schemas";
@@ -81,8 +83,8 @@ export async function PATCH(request: Request, { params }: { params: Promise<{ id
 
 	// Edit Mii in database
 	const updateData: Partial<Mii> = {};
-	if (name !== undefined) updateData.name = name;
+	if (name !== undefined) updateData.name = profanity.censor(name); // Censor potential inappropriate words
-	if (tags !== undefined) updateData.tags = tags;
+	if (tags !== undefined) updateData.tags = tags.map((t) => profanity.censor(t)); // Same here
 	if (images.length > 0) updateData.imageCount = images.length;
 
 	if (Object.keys(updateData).length == 0) return NextResponse.json({ error: "Nothing was changed" }, { status: 400 });

src/app/api/submit/route.ts

@@ -6,6 +6,7 @@ import path from "path";
 import sharp from "sharp";
 
 import qrcode from "qrcode-generator";
+import { profanity } from "@2toad/profanity";
 
 import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
@@ -54,7 +55,11 @@ export async function POST(request: Request) {
 	});
 
 	if (!parsed.success) return NextResponse.json({ error: parsed.error.errors[0].message }, { status: 400 });
-	const { name, tags, qrBytesRaw, image1, image2, image3 } = parsed.data;
+	const { name: uncensoredName, tags: uncensoredTags, qrBytesRaw, image1, image2, image3 } = parsed.data;
+
+	// Censor potential inappropriate words
+	const name = profanity.censor(uncensoredName);
+	const tags = uncensoredTags.map((t) => profanity.censor(t));
 
 	// Validate image files
 	const images: File[] = [];

src/app/terms-of-service/page.tsx

@@ -3,7 +3,7 @@ export default function PrivacyPage() {
 		<div>
 			<h1 className="text-2xl font-bold">Terms of Service</h1>
 			<h2 className="font-light">
-				<strong className="font-medium">Effective Date:</strong> April 06, 2025
+				<strong className="font-medium">Effective Date:</strong> April 23, 2025
 			</h2>
 
 			<hr className="border-black/20 mt-1 mb-4" />
@@ -34,6 +34,7 @@ export default function PrivacyPage() {
 							<li>No impersonation of others.</li>
 							<li>No malware, malicious links, or phishing content.</li>
 							<li>No harassment, hate speech, threats, or bullying towards others.</li>
+							<li>Avoid using inappropriate language. Profanity may be automatically censored.</li>
 							<li>No use of automated scripts, bots, or scrapers to access or interact with the site.</li>
 						</ul>
 					</section>

src/lib/qr-codes.ts

@@ -1,4 +1,6 @@
+import { profanity } from "@2toad/profanity";
 import { AES_CCM } from "@trafficlunar/asmcrypto.js";
+
 import { MII_DECRYPTION_KEY } from "./constants";
 import Mii from "./mii.js/mii";
 import TomodachiLifeMii from "./tomodachi-life-mii";
@@ -39,6 +41,11 @@ export function convertQrCode(bytes: Uint8Array): { mii: Mii; tomodachiLifeMii:
 			mii.facialHairColor = tomodachiLifeMii.studioHairColor;
 		}
 
+		// Censor potential inappropriate words
+		tomodachiLifeMii.firstName = profanity.censor(tomodachiLifeMii.firstName);
+		tomodachiLifeMii.lastName = profanity.censor(tomodachiLifeMii.lastName);
+		tomodachiLifeMii.islandName = profanity.censor(tomodachiLifeMii.islandName);
+
 		return { mii, tomodachiLifeMii };
 	} catch (error) {
 		console.error(error);

src/lib/schemas.ts

@@ -1,5 +1,7 @@
 import { z } from "zod";
 
+// profanity censoring bypasses the regex in some of these but I think it's funny
+
 export const querySchema = z
 	.string()
 	.trim()