Simple javascript validation library.

validate.js

// author: { github: tylerchilds }
// date: 8/5/2016
// license: NO LICENSE
// 
// Simple validation for javascript.
// 
// usage:
//   validate(value, rule);
//
// The rule will be used as a key to get an array of matchers
// The matchers are regular expression tests to check the value
// If the matcher fails, the error message is returned
//
// Error messages are returned if there is at least one error
// If no errors, nothing is returned

const required = (value) => {
  if(! /^.+$/.test(value))
    return "This field is required";
}

const validEmail = (value) => {
  const regex = /^[-a-z0-9~!$%^&*_=+}{\'?]+(\.[-a-z0-9~!$%^&*_=+}{\'?]+)*@([a-z0-9_][-a-z0-9_]*(\.[-a-z0-9_]+)*\.(aero|arpa|biz|com|coop|edu|gov|info|int|mil|museum|name|net|org|pro|travel|mobi|[a-z][a-z])|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(:[0-9]{1,5})?$/i
  if(! regex.test(value))
    return "Valid Emails Only";
}

const rules = {
  email: [required, validEmail],
  required: [required]
}

const validate = (value, rule) => {
  const matchers = rules[rule];
  let errors = [];

  matchers.forEach((matcher) => {
    const error = matcher(value);
    if(error) errors.push(error);
  }, value)

  if(errors.length > 0) return errors;
}

export default validate