Add disallowed usernames

src/lib/validation.ts

@@ -1,16 +1,58 @@
 import { z } from 'zod';
 
+// Reserved usernames for security and system purposes
+const FORBIDDEN_USERNAMES = new Set([
+  // System/Admin accounts
+  'admin', 'administrator', 'moderator', 'mod', 'owner', 'root', 'system', 'support',
+  'staff', 'team', 'official', 'verified', 'bot', 'api', 'service',
+  
+  // Company/Brand protection
+  'thrillwiki', 'lovable', 'supabase', 'cloudflare',
+  
+  // Common system routes/pages
+  'www', 'mail', 'email', 'ftp', 'blog', 'forum', 'shop', 'store', 'app', 'mobile',
+  'help', 'support', 'contact', 'about', 'terms', 'privacy', 'security', 'legal',
+  'login', 'signup', 'register', 'signin', 'signout', 'logout', 'auth', 'oauth',
+  'profile', 'profiles', 'user', 'users', 'account', 'accounts', 'settings',
+  'dashboard', 'console', 'panel', 'manage', 'management',
+  
+  // Technical terms
+  'null', 'undefined', 'true', 'false', 'delete', 'remove', 'test', 'demo',
+  'localhost', 'example', 'temp', 'temporary', 'guest', 'anonymous', 'anon',
+  
+  // Offensive prevention (basic)
+  'fuck', 'shit', 'damn', 'hell', 'ass', 'bitch', 'bastard', 'crap',
+  'nazi', 'hitler', 'stalin', 'terrorist', 'kill', 'death', 'murder',
+  
+  // Impersonation prevention
+  'ceo', 'president', 'manager', 'director', 'executive', 'founder'
+]);
+
 export const usernameSchema = z
   .string()
   .min(3, 'Username must be at least 3 characters')
   .max(30, 'Username must be less than 30 characters')
   .regex(/^[a-zA-Z0-9_-]+$/, 'Username can only contain letters, numbers, underscores, and hyphens')
   .regex(/^[a-zA-Z0-9]/, 'Username must start with a letter or number')
-  .transform(val => val.toLowerCase());
+  .transform(val => val.toLowerCase())
+  .refine(val => !FORBIDDEN_USERNAMES.has(val), 'This username is not allowed');
+
+// Display name validation with content filtering
+export const displayNameSchema = z
+  .string()
+  .max(100, 'Display name must be less than 100 characters')
+  .refine(val => {
+    if (!val) return true;
+    const lowerVal = val.toLowerCase();
+    // Check for basic offensive content in display names
+    const offensiveTerms = ['nazi', 'hitler', 'terrorist', 'kill', 'murder', 'fuck', 'shit'];
+    return !offensiveTerms.some(term => lowerVal.includes(term));
+  }, 'Display name contains inappropriate content')
+  .optional();
 
 export const profileEditSchema = z.object({
   username: usernameSchema,
-  display_name: z.string().max(100, 'Display name must be less than 100 characters').optional(),
+  display_name: displayNameSchema,
   bio: z.string().max(500, 'Bio must be less than 500 characters').optional(),
 });