/*
--------------------------------
Simple PHP Contact Form
--------------------------------
+ https://github.com/pinceladasdaweb/Simple-PHP-Contact-Form
+ A Simple Contact Form developed in PHP with VanillaJS Form validation.
+ version 1.0
+ Copyright 2013 Pedro Rogerio
+ VanillaJS version developed by William Bruno <https://github.com/wbruno>
+ Licensed under the MIT license

+ https://github.com/pinceladasdaweb/Simple-PHP-Contact-Form
*/

/**
 * FormValidation
 */
var FormValidation = (function (document) {
    "use strict";
    /*jslint browser:true*/

    var module = {
        testmail : /^[^0-9][A-z0-9._%+-]+([.][A-z0-9_]+)*[@][A-z0-9_]+([.][A-z0-9_]+)*[.][A-z]{2,4}$/,
        _addError : function($el) {
            return $el.parentNode.classList.add('has-error');
        },
        removeError : function($el) {
            return $el.parentNode.classList.remove('has-error');
        },
        checkMail : function($input) {
            if (!module.testmail.test($input.value)) {
                module._addError($input);
                return false;
            }
            return true;
        },
        checkEmpty : function($input) {
            if ($input.value === '') {
                module._addError($input);
                return false;
            }
            return true;
        }
    };

    return {
        checkValidity : module.checkValidity,
        checkMail : module.checkMail,
        checkEmpty : module.checkEmpty,
        removeError: module.removeError
    };
}(document));

/**
 * @file contact-form.js
 */
(function (document) {
    "use strict";
    /*jslint browser:true, plusplus:true*/

    var $contactForm = document.querySelector("#contact-form"),
        $name        = document.querySelector("#form-name"),
        $mail        = document.querySelector("#form-email"),
        $subject     = document.querySelector("#form-subject"),
        $message     = document.querySelector("#form-message"),
        $required    = document.querySelectorAll(".required"),

        $requiredArray = Array.prototype.slice.call($required);

    if ($contactForm) {
        $contactForm.addEventListener("submit", function(e) {

            $requiredArray.forEach(function($element) {
                FormValidation.removeError($element);
            });

            if (!FormValidation.checkEmpty($name)) {
                e.preventDefault();
            }

            if (!FormValidation.checkMail($mail)) {
                e.preventDefault();
            }

            if (!FormValidation.checkEmpty($subject)) {
                e.preventDefault();
            }

            if (!FormValidation.checkEmpty($message)) {
                e.preventDefault();
            }

        });
    }
}(document));