<?php
/**
* 2007-2017 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Academic Free License (AFL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/afl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to https://www.prestashop.com for more information.
*
*  @author    PrestaShop SA <contact@prestashop.com>
*  @copyright 2007-2017 PrestaShop SA
*  @license   http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

if (!defined('_PS_VERSION_')) {
    exit;
}

require_once 'src/loader.php';

class Invisiblerecaptcha extends Module
{
    protected $config_form = false;

    public function __construct()
    {
        $this->name = 'invisiblerecaptcha';
        $this->tab = 'front_office_features';
        $this->version = '1.0.3';
        $this->author = 'Wiktor Koźmiński';
        $this->need_instance = 0;
        $this->module_key = 'd61d218797b110c7691f596ee1f19533';

        /**
         * Set $this->bootstrap to true if your module is compliant with bootstrap (PrestaShop 1.6)
         */
        $this->bootstrap = true;

        parent::__construct();

        $this->displayName = $this->l('Google Invisible reCAPTCHA');
        $this->description = $this->l('Protects your shop from SPAM using invisible Google reCAPTCHA algorithm');
    }

    /**
     * Don't forget to create update methods if needed:
     * http://doc.prestashop.com/display/PS16/Enabling+the+Auto-Update
     */
    public function install()
    {
        return parent::install() &&
            $this->registerHook('header') &&
            $this->registerHook('actionFrontControllerSetMedia') &&
            $this->registerHook('validateCustomerFormFields');
    }

    public function uninstall()
    {
        return parent::uninstall();
    }

    /**
     * Load the configuration form
     */
    public function getContent()
    {
        /**
         * If values have been submitted in the form, process.
         */
        if (((bool)Tools::isSubmit('submitInvisiblerecaptchaModule')) == true) {
            $this->postProcess();
        }

        $this->context->smarty->assign('module_dir', $this->_path);
        $output = $this->context->smarty->fetch($this->local_path.'views/templates/admin/configure.tpl');

        return $output.$this->renderForm();
    }

    /**
     * Create the form that will be displayed in the configuration of your module.
     */
    protected function renderForm()
    {
        $helper = new HelperForm();
        $config = new Invisiblerecaptcha\Common\Config();

        $helper->show_toolbar = false;
        $helper->table = $this->table;
        $helper->module = $this;
        $helper->default_form_language = $this->context->language->id;
        $helper->allow_employee_form_lang = Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG', 0);

        $helper->identifier = $this->identifier;
        $helper->submit_action = 'submitInvisiblerecaptchaModule';
        $helper->currentIndex = $this->context->link->getAdminLink('AdminModules', false)
            .'&configure='.$this->name.'&tab_module='.$this->tab.'&module_name='.$this->name;
        $helper->token = Tools::getAdminTokenLite('AdminModules');

        $helper->tpl_vars = array(
            'fields_value' => $config->getConfigFormValues(),
            'languages' => $this->context->controller->getLanguages(),
            'id_language' => $this->context->language->id,
        );

        return $helper->generateForm(array(Invisiblerecaptcha\Common\Config::getConfigForm($this)));
    }

    /**
     * Save form data.
     */
    protected function postProcess()
    {
        $valid = true;
        if (!Validate::isString(Tools::getValue('config_sitekey')) || !Tools::strlen(Tools::getValue('config_sitekey'))) {
            $this->context->controller->errors[] = $this->l('Please provide valid sitekey');
            $valid = false;
        }

        if (!Validate::isString(Tools::getValue('config_secretkey')) || !Tools::strlen(Tools::getValue('config_secretkey'))) {
            $this->context->controller->errors[] = $this->l('Please provide valid secretkey');
            $valid = false;
        }

        if ($valid) {
            $config = new Invisiblerecaptcha\Common\Config();
            $config->update();
            $this->context->controller->confirmations[] = $this->l('Configuration form was saved');
        }
    }

    /**
     * Add the CSS & JavaScript files you want to be added on the FO.
     */
    public function hookHeader()
    {
        if (trim($this->context->controller->php_self) != 'contact') {
            return;
        }

        $config = new Invisiblerecaptcha\Common\Config();
        $this->context->controller->addJS($this->_path.'/views/js/front.min.js');

        $this->context->smarty->assign(array(
            'recaptchaSiteKey' => $config->sitekey
        ));

        return $this->display(__FILE__, 'header_hook.tpl');
    }

    /**
     * We are checking "recaptcha" code in "setMedia", because this is the only hook
     * which is executeed BEFORE "postProcess" (where the mails are sent).
     * If recaptcha code is wrong we removing 'from' key from POST and GET array to
     * prevent message from being sent and from being added to conversation table.
     *
     * @see Controller::run
     * @see FrontController::setMedia
     * @return void
     */
    public function hookActionFrontControllerSetMedia()
    {
        if (trim($this->context->controller->php_self) != 'contact') {
            return;
        }

        $config = new Invisiblerecaptcha\Common\Config();

        if (Tools::isSubmit('submitMessage')) {
            $code = Tools::getValue('g-recaptcha-response');
            $recaptcha = new Invisiblerecaptcha\Recaptcha\Recaptcha($config->secretkey);
            if (!$code || !$recaptcha->verifyResponse($code)) {
                $this->context->controller->errors[] = $this->l("Sorry, but it looks like you are not a human");
                unset($_POST['from']);
                unset($_GET['from']);
            }
        }

    }

    public function hookValidateCustomerFormFields()
    {
        /* Place your code here. */
    }
}