website poc

apps/website/lib/email-validation.ts

@@ -0,0 +1,53 @@
+import { z } from 'zod';
+
+/**
+ * Email validation schema using Zod
+ */
+export const emailSchema = z.string()
+  .email('Invalid email format')
+  .min(3, 'Email too short')
+  .max(254, 'Email too long')
+  .toLowerCase()
+  .trim();
+
+/**
+ * Validates an email address
+ * @param email - The email address to validate
+ * @returns Validation result with sanitized email or error
+ */
+export function validateEmail(email: string): {
+  success: boolean;
+  email?: string;
+  error?: string;
+} {
+  const result = emailSchema.safeParse(email);
+  
+  if (result.success) {
+    return {
+      success: true,
+      email: result.data,
+    };
+  }
+  
+  return {
+    success: false,
+    error: result.error.errors[0]?.message || 'Invalid email',
+  };
+}
+
+/**
+ * Check if email appears to be from a disposable email service
+ * Basic check - can be extended with comprehensive list
+ */
+const DISPOSABLE_DOMAINS = new Set([
+  'tempmail.com',
+  'throwaway.email',
+  'guerrillamail.com',
+  'mailinator.com',
+  '10minutemail.com',
+]);
+
+export function isDisposableEmail(email: string): boolean {
+  const domain = email.split('@')[1]?.toLowerCase();
+  return domain ? DISPOSABLE_DOMAINS.has(domain) : false;
+}