client/src/app/shared/forms/form-validators/host.validator.ts

   1 import { FormControl } from '@angular/forms'
   2
   3 export function validateHost (c: FormControl) {
   4   // Thanks to http://stackoverflow.com/a/106223
   5   const HOST_REGEXP = new RegExp(
   6     '^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$'
   7   )
   8
   9   return HOST_REGEXP.test(c.value) ? null : {
  10     validateHost: {
  11       valid: false
  12     }
  13   }
  14 }