src/applications/almanac/util/AlmanacNames.php

   1 <?php
   2
   3 final class AlmanacNames extends Phobject {
   4
   5   public static function validateName($name) {
   6     if (strlen($name) < 3) {
   7       throw new Exception(
   8         pht(
   9           'Almanac service, device, property, network and namespace names '.
  10           'must be at least 3 characters long.'));
  11     }
  12
  13     if (strlen($name) > 100) {
  14       throw new Exception(
  15         pht(
  16           'Almanac service, device, property, network and namespace names '.
  17           'may not be more than 100 characters long.'));
  18     }
  19
  20     if (!preg_match('/^[a-z0-9.-]+\z/', $name)) {
  21       throw new Exception(
  22         pht(
  23           'Almanac service, device, property, network and namespace names '.
  24           'may only contain lowercase letters, numbers, hyphens, and '.
  25           'periods.'));
  26     }
  27
  28     if (preg_match('/(^|\\.)\d+(\z|\\.)/', $name)) {
  29       throw new Exception(
  30         pht(
  31           'Almanac service, device, network, property and namespace names '.
  32           'may not have any segments containing only digits.'));
  33     }
  34
  35     if (preg_match('/\.\./', $name)) {
  36       throw new Exception(
  37         pht(
  38           'Almanac service, device, property, network and namespace names '.
  39           'may not contain multiple consecutive periods.'));
  40     }
  41
  42     if (preg_match('/\\.-|-\\./', $name)) {
  43       throw new Exception(
  44         pht(
  45           'Almanac service, device, property, network and namespace names '.
  46           'may not contain hyphens adjacent to periods.'));
  47     }
  48
  49     if (preg_match('/--/', $name)) {
  50       throw new Exception(
  51         pht(
  52           'Almanac service, device, property, network and namespace names '.
  53           'may not contain multiple consecutive hyphens.'));
  54     }
  55
  56     if (!preg_match('/^[a-z0-9].*[a-z0-9]\z/', $name)) {
  57       throw new Exception(
  58         pht(
  59           'Almanac service, device, property, network and namespace names '.
  60           'must begin and end with a letter or number.'));
  61     }
  62   }
  63
  64 }