phonenumber validator

Author: alexanbj

packages/validation/src/no.ts

@@ -5,3 +5,22 @@
 export function postalCodeValidator(value: string): boolean {
   return /^\d{4}$/.test(value);
 }
+
+type PhoneNumberOptions = {
+  mobileOnly?: boolean;
+};
+
+export function phoneNumberValidator(
+  value: string,
+  options: PhoneNumberOptions = {},
+): boolean {
+  const isPhoneNumber = /^\d{8}$/.test(value);
+
+  if (options.mobileOnly) {
+    // Norwegian mobile phone numbers start with 4 or 9
+    // See https://nkom.no/telefoni-og-telefonnummer/telefonnummer-og-den-norske-nummerplan/alle-nummerserier-for-norske-telefonnumre
+    return isPhoneNumber && ['4', '9'].includes(value.charAt(0));
+  }
+
+  return isPhoneNumber;
+}

packages/validation/src/se.ts

@@ -5,3 +5,21 @@
 export function postalCodeValidator(value: string): boolean {
   return /^\d{3} ?\d{2}$/.test(value);
 }
+
+type PhoneNumberOptions = {
+  mobileOnly?: boolean;
+};
+
+export function phoneNumberValidator(
+  value: string,
+  options: PhoneNumberOptions = {},
+): boolean {
+  if (options.mobileOnly) {
+    const isMobileNumber = /^07\d{8}$/.test(value);
+    return isMobileNumber;
+  }
+
+  const isPhoneNumber = /^0\d{7,9}$/.test(value);
+
+  return isPhoneNumber;
+}

packages/validation/src/validation.test.ts

@@ -1,6 +1,12 @@
 import { describe, expect, test } from 'vitest';
-import { postalCodeValidator as postalCodeValidatorNo } from './no';
-import { postalCodeValidator as postalCodeValidatorSe } from './se';
+import {
+  phoneNumberValidator as phoneNumberValidatorNo,
+  postalCodeValidator as postalCodeValidatorNo,
+} from './no';
+import {
+  phoneNumberValidator as phoneNumberValidatorSe,
+  postalCodeValidator as postalCodeValidatorSe,
+} from './se';
 
 describe('Norwegian', () => {
   describe('postalCodeValidator()', () => {
@@ -13,6 +19,23 @@ describe('Norwegian', () => {
       expect(postalCodeValidatorNo('not a number')).toBeFalsy();
     });
   });
+
+  describe('phoneNumberValidator()', () => {
+    test('validates phone numbers', () => {
+      expect(phoneNumberValidatorNo('22865500')).toBeTruthy();
+      expect(phoneNumberValidatorNo('228655000')).toBeFalsy();
+
+      expect(
+        phoneNumberValidatorNo('40 00 00 00', { mobileOnly: true }),
+      ).toBeTruthy();
+      expect(
+        phoneNumberValidatorNo('99 99 99 99', { mobileOnly: true }),
+      ).toBeTruthy();
+      expect(
+        phoneNumberValidatorNo('22865500', { mobileOnly: true }),
+      ).toBeFalsy();
+    });
+  });
 });
 
 describe('Swedish', () => {
@@ -27,4 +50,26 @@ describe('Swedish', () => {
       expect(postalCodeValidatorSe('not a number')).toBeFalsy();
     });
   });
+
+  describe('phoneNumberValidator()', () => {
+    test('validates phone numbers', () => {
+      // should be 8 to 10 digits
+      expect(phoneNumberValidatorSe('08123456')).toBeTruthy();
+      expect(phoneNumberValidatorSe('031123456')).toBeTruthy();
+      expect(phoneNumberValidatorSe('0311234567')).toBeTruthy();
+
+      // too short
+      expect(phoneNumberValidatorSe('0812345')).toBeFalsy();
+      // too long
+      expect(phoneNumberValidatorSe('0303123456789')).toBeFalsy();
+
+      // cannot start with something other than 0
+      expect(phoneNumberValidatorSe('12345678')).toBeFalsy();
+
+      // A Swedish mobile number is always 10 digits and starts with 07
+      expect(
+        phoneNumberValidatorSe('0712345678', { mobileOnly: true }),
+      ).toBeTruthy();
+    });
+  });
 });