Better form control and profile page

lib/validators.ts

@@ -0,0 +1,47 @@
+// Shared input validators for sign-up, profile, and inventory forms.
+
+export const EMAIL_REGEX = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+
+// Phone: allows digits, spaces, parens, +, -, . — must contain at least 7 digits.
+export const PHONE_REGEX = /^\+?[\d\s().\-]{7,20}$/;
+
+// CAS Registry Number: 2–7 digits, 2 digits, 1 check digit (e.g. 67-56-1).
+export const CAS_REGEX = /^\d{2,7}-\d{2}-\d$/;
+
+export function validateEmail(value: string): boolean {
+  return EMAIL_REGEX.test(value.trim());
+}
+
+export function validatePhone(value: string): boolean {
+  const trimmed = value.trim();
+  if (!PHONE_REGEX.test(trimmed)) return false;
+  // Require at least 7 actual digits to avoid strings of only punctuation.
+  return trimmed.replace(/\D/g, '').length >= 7;
+}
+
+export function validatePhoneOrEmail(value: string): boolean {
+  return validateEmail(value) || validatePhone(value);
+}
+
+export function validateCAS(value: string): boolean {
+  return CAS_REGEX.test(value.trim());
+}
+
+export interface NumberOpts {
+  min?: number;
+  max?: number;
+  integer?: boolean;
+}
+
+export function validateNumber(
+  value: string | number | undefined | null,
+  opts: NumberOpts = {},
+): boolean {
+  if (value == null || value === '') return false;
+  const n = typeof value === 'number' ? value : Number(value);
+  if (!Number.isFinite(n)) return false;
+  if (opts.integer && !Number.isInteger(n)) return false;
+  if (opts.min != null && n < opts.min) return false;
+  if (opts.max != null && n > opts.max) return false;
+  return true;
+}