umbrel-middleware/utils/validator.js

const validator = require('validator');

const ValidationError = require('models/errors.js').ValidationError;

// Max length is listed here,
// https://github.com/lightningnetwork/lnd/blob/fd1f6a7bc46b1e50ff3879b8bd3876d347dbb73d/channeldb/invoices.go#L84
const MAX_MEMO_LENGTH = 1024;
const MIN_PASSWORD_LENGTH = 12;

function isAlphanumeric(string) {

  isDefined(string);

  if (!validator.isAlphanumeric(string)) {
    throw new ValidationError('Must include only alpha numeric characters.');
  }
}

function isAlphanumericAndSpaces(string) {

  isDefined(string);

  if (!validator.matches(string, '^[a-zA-Z0-9\\s]*$')) {
    throw new ValidationError('Must include only alpha numeric characters and spaces.');
  }
}

function isBoolean(value) {
  if (value !== true && value !== false) {
    throw new ValidationError('Must be true or false.');
  }
}

function isDecimal(amount) {
  if (!validator.isDecimal(amount)) {
    throw new ValidationError('Must be decimal.');
  }
}

function isDefined(object) {
  if (object === undefined) {
    throw new ValidationError('Must define variable.');
  }
}

function isMinPasswordLength(password) {
  if (password.length < MIN_PASSWORD_LENGTH) {
    throw new ValidationError('Must be ' + MIN_PASSWORD_LENGTH + ' or more characters.');
  }
}

function isPositiveInteger(amount) {
  if (!validator.isInt(amount + '', {gt: 0})) {
    throw new ValidationError('Must be positive integer.');
  }
}

function isPositiveIntegerOrZero(amount) {
  if (!validator.isInt(amount + '', {gt: -1})) {
    throw new ValidationError('Must be positive integer.');
  }
}

function isString(object) {
  if (typeof object !== 'string') {
    throw new ValidationError('Object must be of type string.');
  }
}

function isValidMemoLength(string) {
  if (Buffer.byteLength(string, 'utf8') > MAX_MEMO_LENGTH) {
    throw new ValidationError('Must be less than ' + MAX_MEMO_LENGTH + ' bytes.');
  }
}

module.exports = {
  isAlphanumeric,
  isAlphanumericAndSpaces,
  isBoolean,
  isDecimal,
  isMinPasswordLength,
  isPositiveInteger,
  isPositiveIntegerOrZero,
  isString,
  isValidMemoLength,
};