feat(validators): add domain validator

projects/common/src/public-api.ts

@@ -122,4 +122,4 @@ export * from './time/time-unit.type';
 export * from './time/time';
 
 // Validators
-export * from './utilities/validators/email-validator';
+export * from './utilities/validators';

projects/common/src/utilities/validators/domain-validator.test.ts

@@ -0,0 +1,23 @@
+import { isDomainValid } from './domain-validator';
+
+const VALID_DOMAINS = [
+  'google.com',
+  'fig.io',
+  'hypertrace.org',
+  'f4ncy-domain.cc',
+  'hypertrace.co.uk',
+  'HYPERTRACE.ORG',
+  'HYPER.TRACE.ORG',
+  'hyper.trace.org'
+];
+const INVALID_DOMAINS = ['.hypertrace.org.', 'hypertrace.42', 'hyper.$trace', 'hyper-trac.e'];
+describe('Domain validator', () => {
+  test('can validate email lists correctly', () => {
+    VALID_DOMAINS.forEach(domain => {
+      expect(isDomainValid(domain)).toBeTruthy();
+    });
+    INVALID_DOMAINS.forEach(domain => {
+      expect(isDomainValid(domain)).toBeFalsy();
+    });
+  });
+});

projects/common/src/utilities/validators/domain-validator.ts

@@ -0,0 +1,5 @@
+export const DOMAIN_REGEX = new RegExp(/^.+\.[a-zA-Z]{2,}$/);
+
+export const isDomainValid = (domain: string) => DOMAIN_REGEX.test(domain);
+
+export const areDomainsValid = (domains: string[]) => domains.every(isDomainValid);

projects/common/src/utilities/validators/index.ts

@@ -0,0 +1,2 @@
+export * from './domain-validator';
+export * from './email-validator';