@ianwalter/nrg-validation NPM

@ianwalter/nrg-validation

Pragmatic validation for Node.js

Example Usage

Implementation

import {
  SchemaValidator,
  isEmail,
  isString,
  isStrongPassword,
  isPhone,
  canBeEmpty,
  Validation,
  ValidationError
} from '@ianwalter/nrg-validation'

// Custom validator example:
const msg = 'Occupation must contain software.'
const mustContainSoftware = occupation => (
  new Validation(occupation.toLowerCase().includes('software') || msg)
)

// Create the validator.
const registrationValidator = new SchemaValidator({
  email: { isEmail },
  name: { isString },
  password: { isStrongPassword, message: 'Your password must be stronger.' },
  occupation: { mustContainSoftware },
  phone: { isPhone, canBeEmpty, name: 'telephone number' }
})

try {
  // Validate the input.
  await registrationValidator.validate(req.body).orThrow()

  // Continue to do something here.
} catch (error) {
  if (error instanceof ValidationError) {
    // If the error is a ValidationError, respond with the invalid results.
    res.status(400).json(error.feedback)
  } else {
    res.status(500).end()
  }
}

Input (req.body):

{
  "email": "hahahaha",
  "name": "",
  "password": "qwerty",
  "occupation": "CEO",
  "phone": "777"
}

Output (validation):

{
  email: ['A valid email address is required.'],
  name: ['Name is required.'],
  password: ['Your password must be stronger.'],
  occupation: ['Occupation must contain software.'],
  phone: ['A valid telephone number is required.']
}

Bundled Validators

Basic Types

Name	Descriptionn
isString	Validates whether input is a String.

Advanced Types

Name	Descriptionn
isTimestamp	Validates whether input is a valid ISO8601 timestamp.
Valid example: '2018-01-01T00:00:00.000Z'
isEmail	Validates whether input is a valid email address.
Valid example: sharonjones@hotmail.com
Invalid example: ting#fastmail.com
isPhone	Validates whether input is a valid phone number.
isStrongPassword	Validates whether input is a strong (has a score of 3 or 4)
password using zxcvbn
Valid example: 'Dmbu5bc5yeCRwsRD'
Invalid example: 'qwerty'
isUrl	Validates whether input is a valid URL.
isZip	Validates wehther input is a valid zip code.

Non-validator Options

Name	Description
name	Allows you to customize the name of the field as it appears in
the error message. If this is not specified, the error message
will use a default specified by the validator used or the object
key.
message	Allows you to set the error message.
isOptional	Allows you to mark the field as optional/not required.