mundipagg/magento2

var MultibuyerValidator = function (formObject) {
    this.formObject = formObject;
};

MultibuyerValidator.prototype.validate = function () {
    var formObject = this.formObject;
    var inputsInvalid = [];

    
    if (
        typeof formObject.multibuyer != 'undefined' &&
        typeof formObject.multibuyer.showMultibuyer != 'undefined' &&
        formObject.multibuyer.showMultibuyer.prop( "checked" ) == true
    ) {

        inputsInvalid.push(
            this.isInputInvalid(formObject.multibuyer.firstname),
            this.isInputInvalid(formObject.multibuyer.lastname),
            this.isEmailInvalid(formObject.multibuyer.email),
            this.isInputInvalid(formObject.multibuyer.zipcode),
            this.isInputInvalid(formObject.multibuyer.document),
            this.isInputInvalid(formObject.multibuyer.street),
            this.isInputInvalid(formObject.multibuyer.number),
            this.isInputInvalid(formObject.multibuyer.neighborhood),
            this.isInputInvalid(formObject.multibuyer.city),
            this.isInputInvalid(formObject.multibuyer.state),
            this.isInputInvalid(formObject.multibuyer.mobilePhone)
        );
    }

    var hasInputInvalid = inputsInvalid.filter(function (item) {
        return item;
    });

    if (hasInputInvalid.length > 0) {
        return false;
    }

    return true;
}

MultibuyerValidator.prototype.isInputInvalid = function (element, message = "") {
    var parentsElements = element.parent().parent();

    if (element.val() == "") {
        parentsElements.addClass("_error");
        parentsElements.find('.field-error').show();
        return true;
    }

    parentsElements.removeClass('_error');
    parentsElements.find('.field-error').hide();
    return false;
}

MultibuyerValidator.prototype.isEmailInvalid = function (element, message = "") {
    if (this.isInputInvalid(element)) {
        return true;
    }

    var parentsElements = element.parent().parent();

    var isValid = /\S+@\S+\.\S+/.test(element.val());

    if (!isValid) {
        parentsElements.addClass("_error");
        parentsElements.find('.field-error').show();
        return true;
    }

    parentsElements.removeClass('_error');
    parentsElements.find('.field-error').hide();
    return false;
}