waigo/src/support/forms/validators/isLength.js

Node.js ES6 framework for reactive, data-driven apps and APIs (Koa, RethinkDB)

"use strict";

const waigo = global.waigo,
  _ = waigo._,
  FieldValidationError = waigo.load('support/forms/field').FieldValidationError;



/**
 * Validator to check whether given string is at least of given length.
 *
 * @param options {Object} Options.
 * @param options.min {Object} Minimum length.
 * @param options.max {Object} Maximum length.
 * 
 * @throws Error If not an email address.
 */
module.exports = function(options) {
  options = _.extend({
    min: 0,
    max: 10000000,
  }, options);

  return function*(context, field, value) {
    let len = _.get(value, 'length', 0);
    let min = options.min;
    let max = options.max;

    if (min > len || max < len) {
      throw new FieldValidationError('Must be between ' 
        + options.min + ' and ' 
        + options.max + ' characters in length'
      );
    }
  }
};