@incdevco/framework/validators/length/index.js

node.js lambda framework

var Promise = require('bluebird');

function LengthValidator(config) {
  'use strict';
  
  this.maximum = config.maximum;
  
  this.minimum = config.minimum;
  
}

LengthValidator.prototype.validate = function (input, context) {
  'use strict';
  
  var self = this;
  
  return Promise.try(function () {
    
    if (self.maximum) {
      
      if (input.length > self.maximum) {
        
        throw new Error('Must be less than ' + self.maximum + ' characters long.');
        
      }
      
    }
    
    if (self.minimum) {
      
      if (input.length < self.minimum) {
        
        throw new Error('Must be at least ' + self.minimum + ' characters long.');
        
      }
      
    }
    
    return true;
    
  })
  
};

module.exports = LengthValidator;