@govuk-pay/pay-js-commons/lib/utils/field-validation-checks.js

Reusable js scripts for GOV.UK Pay Node.js projects

'use strict';

// NPM dependencies
var parseInt = require('lodash/parseInt');

// Local dependencies
var emailValidator = require('./is-valid-email');

// Constants
var NUMBERS_ONLY = /^\d+$/;
var MAX_AMOUNT = 100000;
var validationErrors = {
  required: 'This field cannot be blank',
  currency: 'Choose an amount in pounds and pence using digits and a decimal point. For example “10.50”',
  phoneNumber: 'Must be a 11 digit phone number',
  validEmail: 'Please use a valid email address',
  isHttps: 'URL must begin with https://',
  isAboveMaxAmount: "Choose an amount under \xA3".concat(MAX_AMOUNT.toLocaleString()),
  isPasswordLessThanTenChars: 'Choose a Password of 10 characters or longer',
  isGreaterThanMaxLengthChars: 'The text is too long',
  invalidCharacters: 'You cannot use any of the following characters < > ; : ` ( ) " \' = | , ~ [ ]'
};
exports.isEmpty = function (value) {
  if (value === '') {
    return validationErrors.required;
  }
  return false;
};
exports.isCurrency = function (value) {
  if (!/^(\d+)(?:\.(\d{1,2}))?$/.test(value)) {
    return validationErrors.currency;
  }
  return false;
};
exports.isValidEmail = function (value) {
  if (!emailValidator(value)) {
    return validationErrors.validEmail;
  }
  return false;
};
exports.isPhoneNumber = function (value) {
  var trimmedTelephoneNumber = value.replace(/\s/g, '');
  if (trimmedTelephoneNumber.length < 11 || !NUMBERS_ONLY.test(trimmedTelephoneNumber)) {
    return validationErrors.phoneNumber;
  }
  return false;
};
exports.isHttps = function (value) {
  if (value.substr(0, 8) !== 'https://') {
    return validationErrors.isHttps;
  }
  return false;
};
exports.isAboveMaxAmount = function (value) {
  if (!exports.isCurrency(value) && parseFloat(value) > MAX_AMOUNT) {
    return validationErrors.isAboveMaxAmount;
  }
  return false;
};
exports.isFieldGreaterThanMaxLengthChars = function (value, maxLength) {
  var parsedMaxLength = parseInt(maxLength);
  return parsedMaxLength && value.length > parsedMaxLength ? validationErrors.isGreaterThanMaxLengthChars : false;
};
exports.isPasswordLessThanTenChars = function (value) {
  return !value || value.length < 10 ? validationErrors.isPasswordLessThanTenChars : false;
};
exports.isNaxsiSafe = function (value) {
  if (/[<>;:`()"=|,~[\]]+/g.test(value)) {
    return validationErrors.invalidCharacters;
  }
  return false;
};