cross-validator/src/validator/validator.js

A Cross Script Validator, node, browser, java

(function () {
	'use strict';
	var util = require('./util');
	var execValidators = require('./execValidators');
	var ValidatorResult = require('./validatorResult');

	/**
	 * Class Validator
	 * @param data Object
	 * @param constrains Array
	 * @author Guilherme M Gregio <guilherme@gregio.net>
	 */
	var Validator = function (data, constrains) {
		var _data = data;
		var _constrains = constrains;

		verifyData(_data);
		verifyConstrains(_constrains);

		this.getData = function () {
			return _data;
		};

		this.getConstrains = function () {
			return _constrains;
		};

		this.validate = function () {
			var errors = {};
			execValidators.using(this.getConstrains()).outErrors(errors).forData(this.getData()).validate();
			return new ValidatorResult(errors);
		};
	};

	function verifyData(data) {
		if (util.isEmpty(data) || !util.isObject(data)) {
			var message = 'Data is Invalid. Expected an Object not empty, but was given: :result';
			message = message.replace(":result", JSON.stringify(data, null, 4));

			throw new InvalidArguments(message);
		}
	}

	function verifyConstrains(constrains) {
		if (util.isEmpty(constrains) || !util.isArray(constrains)) {
			var message = 'Constrains is Invalid. Expected an Array not empty, but was given: :result';
			message = message.replace(":result", JSON.stringify(constrains, null, 4));

			throw new InvalidArguments(message);
		}
	}

	var InvalidArguments = function (message) {
		var error = new Error(message);
		error.name = 'InvalidArguments';
		throw error;
	};

	module.exports = Validator;
})();