<?php
/*
* 2007-2016 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 http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2016 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;

class Blocknewsletter extends Module
{
	const GUEST_NOT_REGISTERED = -1;
	const CUSTOMER_NOT_REGISTERED = 0;
	const GUEST_REGISTERED = 1;
	const CUSTOMER_REGISTERED = 2;

	public function __construct()
	{
		$this->name = 'blocknewsletter';
		$this->tab = 'front_office_features';
		$this->need_instance = 0;

		$this->controllers = array('verification');

		$this->bootstrap = true;
		parent::__construct();

		$this->displayName = $this->l('Newsletter block');
		$this->description = $this->l('Adds a block for newsletter subscription.');
		$this->confirmUninstall = $this->l('Are you sure that you want to delete all of your contacts?');
		$this->ps_versions_compliancy = array('min' => '1.6', 'max' => '1.6.99.99');

		$this->version = '2.3.2';
		$this->author = 'PrestaShop';
		$this->error = false;
		$this->valid = false;
		$this->_files = array(
			'name' => array('newsletter_conf', 'newsletter_voucher'),
			'ext' => array(
				0 => 'html',
				1 => 'txt'
			)
		);

		$this->_searched_email = null;

		$this->_html = '';
		if ($this->id)
		{
			$this->file = 'export_'.Configuration::get('PS_NEWSLETTER_RAND').'.csv';
			$this->post_valid = array();

			// Getting data...
			$countries = Country::getCountries($this->context->language->id);

			// ...formatting array
			$countries_list = array($this->l('All countries'));
			foreach ($countries as $country)
				$countries_list[$country['id_country']] = $country['name'];

			// And filling fields to show !
			$this->fields_export = array(
				'COUNTRY' => array(
					'title' => $this->l('Customers\' country'),
					'desc' => $this->l('Filter customers\' country.'),
					'type' => 'select',
					'value' => $countries_list,
					'value_default' => 0
				),
				'SUSCRIBERS' => array(
					'title' => $this->l('Newsletter subscribers'),
					'desc' => $this->l('Filter newsletter subscribers.'),
					'type' => 'select',
					'value' => array(
						0 => $this->l('All customers'),
						2 => $this->l('Subscribers'),
						1 => $this->l('Non-subscribers')
					),
					'value_default' => 2
				),
				'OPTIN' => array(
					'title' => $this->l('Opted-in subscribers'),
					'desc' => $this->l('Filter opted-in subscribers.'),
					'type' => 'select',
					'value' => array(
						0 => $this->l('All customers'),
						2 => $this->l('Subscribers'),
						1 => $this->l('Non-subscribers')
					),
					'value_default' => 0
				),
			);
		}
	}

	public function install()
	{
		if (!parent::install() || !Configuration::updateValue('PS_NEWSLETTER_RAND', rand().rand()) || !$this->registerHook(array('header', 'footer', 'actionCustomerAccountAdd')))
			return false;

		Configuration::updateValue('NW_SALT', Tools::passwdGen(16));

		return Db::getInstance()->execute('
		CREATE TABLE IF NOT EXISTS `'._DB_PREFIX_.'newsletter` (
			`id` int(6) NOT NULL AUTO_INCREMENT,
			`id_shop` INTEGER UNSIGNED NOT NULL DEFAULT \'1\',
			`id_shop_group` INTEGER UNSIGNED NOT NULL DEFAULT \'1\',
			`email` varchar(255) NOT NULL,
			`newsletter_date_add` DATETIME NULL,
			`ip_registration_newsletter` varchar(15) NOT NULL,
			`http_referer` VARCHAR(255) NULL,
			`active` TINYINT(1) NOT NULL DEFAULT \'0\',
			PRIMARY KEY(`id`)
		) ENGINE='._MYSQL_ENGINE_.' default CHARSET=utf8');
	}

	public function uninstall()
	{
		Db::getInstance()->execute('DROP TABLE '._DB_PREFIX_.'newsletter');

		return parent::uninstall();
	}

	public function getContent()
	{
		if (Tools::isSubmit('submitUpdate'))
		{
			Configuration::updateValue('NW_CONFIRMATION_EMAIL', (bool)Tools::getValue('NW_CONFIRMATION_EMAIL'));
			Configuration::updateValue('NW_VERIFICATION_EMAIL', (bool)Tools::getValue('NW_VERIFICATION_EMAIL'));

			$voucher = Tools::getValue('NW_VOUCHER_CODE');
			if ($voucher && !Validate::isDiscountName($voucher))
				$this->_html .= $this->displayError($this->l('The voucher code is invalid.'));
			else
			{
				Configuration::updateValue('NW_VOUCHER_CODE', pSQL($voucher));
				$this->_html .= $this->displayConfirmation($this->l('Settings updated'));
			}
		}
		elseif (Tools::isSubmit('subscribedmerged'))
		{
			$id = Tools::getValue('id');

			if(preg_match('/(^N)/', $id))
			{
				$id = (int)substr($id, 1);
				$sql = 'UPDATE '._DB_PREFIX_.'newsletter SET active = 0 WHERE id = '.$id;
				Db::getInstance()->execute($sql);
			}
			else
			{
				$c = new Customer((int)$id);
				$c->newsletter = (int)!$c->newsletter;
				$c->update();
			}
			Tools::redirectAdmin($this->context->link->getAdminLink('AdminModules', false).'&configure='.$this->name.'&conf=4&token='.Tools::getAdminTokenLite('AdminModules'));

		}
		elseif (Tools::isSubmit('submitExport') && $action = Tools::getValue('action'))
			$this->export_csv();
		elseif (Tools::isSubmit('searchEmail'))
			$this->_searched_email = Tools::getValue('searched_email');

		$this->_html .= $this->renderForm();
		$this->_html .= $this->renderSearchForm();
		$this->_html .= $this->renderList();

		$this->_html .= $this->renderExportForm();

		return $this->_html;
	}

	public function renderList()
	{
		$fields_list = array(

			'id' => array(
				'title' => $this->l('ID'),
				'search' => false,
			),
			'shop_name' => array(
				'title' => $this->l('Shop'),
				'search' => false,
			),
			'gender' => array(
				'title' => $this->l('Gender'),
				'search' => false,
			),
			'lastname' => array(
				'title' => $this->l('Lastname'),
				'search' => false,
			),
			'firstname' => array(
				'title' => $this->l('Firstname'),
				'search' => false,
			),
			'email' => array(
				'title' => $this->l('Email'),
				'search' => false,
			),
			'subscribed' => array(
				'title' => $this->l('Subscribed'),
				'type' => 'bool',
				'active' => 'subscribed',
				'search' => false,
			),
			'newsletter_date_add' => array(
				'title' => $this->l('Subscribed on'),
				'type' => 'date',
				'search' => false,
			)
		);

		if (!Configuration::get('PS_MULTISHOP_FEATURE_ACTIVE'))
			unset($fields_list['shop_name']);

		$helper_list = New HelperList();
		$helper_list->module = $this;
		$helper_list->title = $this->l('Newsletter registrations');
		$helper_list->shopLinkType = '';
		$helper_list->no_link = true;
		$helper_list->show_toolbar = true;
		$helper_list->simple_header = false;
		$helper_list->identifier = 'id';
		$helper_list->table = 'merged';
		$helper_list->currentIndex = $this->context->link->getAdminLink('AdminModules', false).'&configure='.$this->name;
		$helper_list->token = Tools::getAdminTokenLite('AdminModules');
		$helper_list->actions = array('viewCustomer');

		/* Before 1.6.0.7 displayEnableLink() could not be overridden in Module class
		   we declare another row action instead 			*/
		if (version_compare(_PS_VERSION_, '1.6.0.7', '<'))
		{
			unset($fields_list['subscribed']);
			$helper_list->actions = array_merge($helper_list->actions, array('unsubscribe'));
		}

		// This is needed for displayEnableLink to avoid code duplication
		$this->_helperlist = $helper_list;

		/* Retrieve list data */
		$subscribers = $this->getSubscribers();
		$helper_list->listTotal = count($subscribers);

		/* Paginate the result */
		$page = ($page = Tools::getValue('submitFilter'.$helper_list->table)) ? $page : 1;
		$pagination = ($pagination = Tools::getValue($helper_list->table.'_pagination')) ? $pagination : 50;
		$subscribers = $this->paginateSubscribers($subscribers, $page, $pagination);

		return $helper_list->generateList($subscribers, $fields_list);
	}

	public function displayViewCustomerLink($token = null, $id, $name = null)
	{
		$this->smarty->assign(array(
			'href' => 'index.php?controller=AdminCustomers&id_customer='.(int)$id.'&updatecustomer&token='.Tools::getAdminTokenLite('AdminCustomers'),
			'action' => $this->l('View'),
			'disable' => !((int)$id > 0),
		));

		return $this->display(__FILE__, 'views/templates/admin/list_action_viewcustomer.tpl');
	}

	public function displayEnableLink($token, $id, $value, $active, $id_category = null, $id_product = null, $ajax = false)
	{
		$this->smarty->assign(array(
			'ajax' => $ajax,
			'enabled' => (bool)$value,
			'url_enable' => $this->_helperlist->currentIndex.'&'.$this->_helperlist->identifier.'='.$id.'&'.$active.$this->_helperlist->table.($ajax ? '&action='.$active.$this->_helperlist->table.'&ajax='.(int)$ajax : '').((int)$id_category && (int)$id_product ? '&id_category='.(int)$id_category : '').'&token='.$token
		));

		return $this->display(__FILE__, 'views/templates/admin/list_action_enable.tpl');
	}

	public function displayUnsubscribeLink($token = null, $id, $name = null)
	{
		$this->smarty->assign(array(
			'href' => $this->_helperlist->currentIndex.'&subscribedcustomer&'.$this->_helperlist->identifier.'='.$id.'&token='.$token,
			'action' => $this->l('Unsubscribe'),
		));

		return $this->display(__FILE__, 'views/templates/admin/list_action_unsubscribe.tpl');
	}

	/**
	 * Check if this mail is registered for newsletters
	 *
	 * @param string $customer_email
	 *
	 * @return int -1 = not a customer and not registered
	 *                0 = customer not registered
	 *                1 = registered in block
	 *                2 = registered in customer
	 */
	public function isNewsletterRegistered($customer_email)
	{
		$sql = 'SELECT `email`
				FROM '._DB_PREFIX_.'newsletter
				WHERE `email` = \''.pSQL($customer_email).'\'
				AND id_shop = '.$this->context->shop->id;

		if (Db::getInstance()->getRow($sql))
			return self::GUEST_REGISTERED;

		$sql = 'SELECT `newsletter`
				FROM '._DB_PREFIX_.'customer
				WHERE `email` = \''.pSQL($customer_email).'\'
				AND id_shop = '.$this->context->shop->id;

		if (!$registered = Db::getInstance()->getRow($sql))
			return self::GUEST_NOT_REGISTERED;

		if ($registered['newsletter'] == '1')
			return self::CUSTOMER_REGISTERED;

		return self::CUSTOMER_NOT_REGISTERED;
	}

	/**
	 * Register in block newsletter
	 */
	protected function newsletterRegistration()
	{
		if (empty($_POST['email']) || !Validate::isEmail($_POST['email']))
			return $this->error = $this->l('Invalid email address.');

		/* Unsubscription */
		else if ($_POST['action'] == '1')
		{
			$register_status = $this->isNewsletterRegistered($_POST['email']);

			if ($register_status < 1)
				return $this->error = $this->l('This email address is not registered.');

			if (!$this->unregister($_POST['email'], $register_status))
				return $this->error = $this->l('An error occurred while attempting to unsubscribe.');

			return $this->valid = $this->l('Unsubscription successful.');
		}
		/* Subscription */
		else if ($_POST['action'] == '0')
		{
			$register_status = $this->isNewsletterRegistered($_POST['email']);
			if ($register_status > 0)
				return $this->error = $this->l('This email address is already registered.');

			$email = pSQL($_POST['email']);
			if (!$this->isRegistered($register_status))
			{
				if (Configuration::get('NW_VERIFICATION_EMAIL'))
				{
					// create an unactive entry in the newsletter database
					if ($register_status == self::GUEST_NOT_REGISTERED)
						$this->registerGuest($email, false);

					if (!$token = $this->getToken($email, $register_status))
						return $this->error = $this->l('An error occurred during the subscription process.');

					$this->sendVerificationEmail($email, $token);

					return $this->valid = $this->l('A verification email has been sent. Please check your inbox.');
				}
				else
				{
					if ($this->register($email, $register_status))
						$this->valid = $this->l('You have successfully subscribed to this newsletter.');
					else
						return $this->error = $this->l('An error occurred during the subscription process.');

					if ($code = Configuration::get('NW_VOUCHER_CODE'))
						$this->sendVoucher($email, $code);

					if (Configuration::get('NW_CONFIRMATION_EMAIL'))
						$this->sendConfirmationEmail($email);
				}
			}
		}
	}

	public function getSubscribers()
	{
		$dbquery = new DbQuery();
		$dbquery->select('c.`id_customer` AS `id`, s.`name` AS `shop_name`, gl.`name` AS `gender`, c.`lastname`, c.`firstname`, c.`email`, c.`newsletter` AS `subscribed`, c.`newsletter_date_add`');
		$dbquery->from('customer', 'c');
		$dbquery->leftJoin('shop', 's', 's.id_shop = c.id_shop');
		$dbquery->leftJoin('gender', 'g', 'g.id_gender = c.id_gender');
		$dbquery->leftJoin('gender_lang', 'gl', 'g.id_gender = gl.id_gender AND gl.id_lang = '.(int)$this->context->employee->id_lang);
		$dbquery->where('c.`newsletter` = 1');
		if ($this->_searched_email)
			$dbquery->where('c.`email` LIKE \'%'.pSQL($this->_searched_email).'%\' ');

		$customers = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($dbquery->build());

		$dbquery = new DbQuery();
		$dbquery->select('CONCAT(\'N\', n.`id`) AS `id`, s.`name` AS `shop_name`, NULL AS `gender`, NULL AS `lastname`, NULL AS `firstname`, n.`email`, n.`active` AS `subscribed`, n.`newsletter_date_add`');
		$dbquery->from('newsletter', 'n');
		$dbquery->leftJoin('shop', 's', 's.id_shop = n.id_shop');
		$dbquery->where('n.`active` = 1');
		if ($this->_searched_email)
			$dbquery->where('n.`email` LIKE \'%'.pSQL($this->_searched_email).'%\' ');

		$non_customers = Db::getInstance()->executeS($dbquery->build());

		$subscribers = array_merge($customers, $non_customers);

		return $subscribers;
	}

	public function paginateSubscribers($subscribers, $page = 1, $pagination = 50)
	{
		if(count($subscribers) > $pagination)
			$subscribers = array_slice($subscribers, $pagination * ($page - 1), $pagination);

		return $subscribers;
	}

	/**
	 * Return true if the registered status correspond to a registered user
	 *
	 * @param int $register_status
	 *
	 * @return bool
	 */
	protected function isRegistered($register_status)
	{
		return in_array(
			$register_status,
			array(self::GUEST_REGISTERED, self::CUSTOMER_REGISTERED)
		);
	}


	/**
	 * Subscribe an email to the newsletter. It will create an entry in the newsletter table
	 * or update the customer table depending of the register status
	 *
	 * @param string $email
	 * @param int    $register_status
	 */
	protected function register($email, $register_status)
	{
		if ($register_status == self::GUEST_NOT_REGISTERED)
			return $this->registerGuest($email);

		if ($register_status == self::CUSTOMER_NOT_REGISTERED)
			return $this->registerUser($email);

		return false;
	}

	protected function unregister($email, $register_status)
	{
		if ($register_status == self::GUEST_REGISTERED)
			$sql = 'DELETE FROM '._DB_PREFIX_.'newsletter WHERE `email` = \''.pSQL($_POST['email']).'\' AND id_shop = '.$this->context->shop->id;
		else if ($register_status == self::CUSTOMER_REGISTERED)
			$sql = 'UPDATE '._DB_PREFIX_.'customer SET `newsletter` = 0 WHERE `email` = \''.pSQL($_POST['email']).'\' AND id_shop = '.$this->context->shop->id;

		if (!isset($sql) || !Db::getInstance()->execute($sql))
			return false;

		return true;
	}

	/**
	 * Subscribe a customer to the newsletter
	 *
	 * @param string $email
	 *
	 * @return bool
	 */
	protected function registerUser($email)
	{
		$sql = 'UPDATE '._DB_PREFIX_.'customer
				SET `newsletter` = 1, newsletter_date_add = NOW(), `ip_registration_newsletter` = \''.pSQL(Tools::getRemoteAddr()).'\'
				WHERE `email` = \''.pSQL($email).'\'
				AND id_shop = '.$this->context->shop->id;

		return Db::getInstance()->execute($sql);
	}

	/**
	 * Subscribe a guest to the newsletter
	 *
	 * @param string $email
	 * @param bool   $active
	 *
	 * @return bool
	 */
	protected function registerGuest($email, $active = true)
	{
		$sql = 'INSERT INTO '._DB_PREFIX_.'newsletter (id_shop, id_shop_group, email, newsletter_date_add, ip_registration_newsletter, http_referer, active)
				VALUES
				('.$this->context->shop->id.',
				'.$this->context->shop->id_shop_group.',
				\''.pSQL($email).'\',
				NOW(),
				\''.pSQL(Tools::getRemoteAddr()).'\',
				(
					SELECT c.http_referer
					FROM '._DB_PREFIX_.'connections c
					WHERE c.id_guest = '.(int)$this->context->customer->id.'
					ORDER BY c.date_add DESC LIMIT 1
				),
				'.(int)$active.'
				)';

		return Db::getInstance()->execute($sql);
	}


	public function activateGuest($email)
	{
		return Db::getInstance()->execute(
			'UPDATE `'._DB_PREFIX_.'newsletter`
						SET `active` = 1
						WHERE `email` = \''.pSQL($email).'\''
		);
	}

	/**
	 * Returns a guest email by token
	 *
	 * @param string $token
	 *
	 * @return string email
	 */
	protected function getGuestEmailByToken($token)
	{
		$sql = 'SELECT `email`
				FROM `'._DB_PREFIX_.'newsletter`
				WHERE MD5(CONCAT( `email` , `newsletter_date_add`, \''.pSQL(Configuration::get('NW_SALT')).'\')) = \''.pSQL($token).'\'
				AND `active` = 0';

		return Db::getInstance()->getValue($sql);
	}

	/**
	 * Returns a customer email by token
	 *
	 * @param string $token
	 *
	 * @return string email
	 */
	protected function getUserEmailByToken($token)
	{
		$sql = 'SELECT `email`
				FROM `'._DB_PREFIX_.'customer`
				WHERE MD5(CONCAT( `email` , `date_add`, \''.pSQL(Configuration::get('NW_SALT')).'\')) = \''.pSQL($token).'\'
				AND `newsletter` = 0';

		return Db::getInstance()->getValue($sql);
	}

	/**
	 * Return a token associated to an user
	 *
	 * @param string $email
	 * @param string $register_status
	 */
	protected function getToken($email, $register_status)
	{
		if (in_array($register_status, array(self::GUEST_NOT_REGISTERED, self::GUEST_REGISTERED)))
		{
			$sql = 'SELECT MD5(CONCAT( `email` , `newsletter_date_add`, \''.pSQL(Configuration::get('NW_SALT')).'\')) as token
					FROM `'._DB_PREFIX_.'newsletter`
					WHERE `active` = 0
					AND `email` = \''.pSQL($email).'\'';
		}
		else if ($register_status == self::CUSTOMER_NOT_REGISTERED)
		{
			$sql = 'SELECT MD5(CONCAT( `email` , `date_add`, \''.pSQL(Configuration::get('NW_SALT')).'\' )) as token
					FROM `'._DB_PREFIX_.'customer`
					WHERE `newsletter` = 0
					AND `email` = \''.pSQL($email).'\'';
		}

		return Db::getInstance()->getValue($sql);
	}

	/**
	 * Ends the registration process to the newsletter
	 *
	 * @param string $token
	 *
	 * @return string
	 */
	public function confirmEmail($token)
	{
		$activated = false;

		if ($email = $this->getGuestEmailByToken($token))
			$activated = $this->activateGuest($email);
		else if ($email = $this->getUserEmailByToken($token))
			$activated = $this->registerUser($email);

		if (!$activated)
			return $this->l('This email is already registered and/or invalid.');

		if ($discount = Configuration::get('NW_VOUCHER_CODE'))
			$this->sendVoucher($email, $discount);

		if (Configuration::get('NW_CONFIRMATION_EMAIL'))
			$this->sendConfirmationEmail($email);

		return $this->l('Thank you for subscribing to our newsletter.');
	}

	/**
	 * Send the confirmation mails to the given $email address if needed.
	 *
	 * @param string $email Email where to send the confirmation
	 *
	 * @note the email has been verified and might not yet been registered. Called by AuthController::processCustomerNewsletter
	 *
	 */
	public function confirmSubscription($email)
	{
		if ($email)
		{
			if ($discount = Configuration::get('NW_VOUCHER_CODE'))
				$this->sendVoucher($email, $discount);

			if (Configuration::get('NW_CONFIRMATION_EMAIL'))
				$this->sendConfirmationEmail($email);
		}
	}

	/**
	 * Send an email containing a voucher code
	 *
	 * @param $email
	 * @param $code
	 *
	 * @return bool|int
	 */
	protected function sendVoucher($email, $code)
	{
		return Mail::Send($this->context->language->id, 'newsletter_voucher', Mail::l('Newsletter voucher', $this->context->language->id), array('{discount}' => $code), $email, null, null, null, null, null, dirname(__FILE__).'/mails/', false, $this->context->shop->id);
	}

	/**
	 * Send a confirmation email
	 *
	 * @param string $email
	 *
	 * @return bool
	 */
	protected function sendConfirmationEmail($email)
	{
		return Mail::Send($this->context->language->id, 'newsletter_conf', Mail::l('Newsletter confirmation', $this->context->language->id), array(), pSQL($email), null, null, null, null, null, dirname(__FILE__).'/mails/', false, $this->context->shop->id);
	}

	/**
	 * Send a verification email
	 *
	 * @param string $email
	 * @param string $token
	 *
	 * @return bool
	 */
	protected function sendVerificationEmail($email, $token)
	{
		$verif_url = Context::getContext()->link->getModuleLink(
			'blocknewsletter', 'verification', array(
				'token' => $token,
			)
		);

		return Mail::Send($this->context->language->id, 'newsletter_verif', Mail::l('Email verification', $this->context->language->id), array('{verif_url}' => $verif_url), $email, null, null, null, null, null, dirname(__FILE__).'/mails/', false, $this->context->shop->id);
	}

	public function hookDisplayRightColumn($params)
	{
		return $this->hookDisplayLeftColumn($params);
	}

	protected function _prepareHook($params)
	{
		if (Tools::isSubmit('submitNewsletter'))
		{
			$this->newsletterRegistration();
			if ($this->error)
			{
				$this->smarty->assign(
					array(
						'color' => 'red',
						'msg' => $this->error,
						'nw_value' => isset($_POST['email']) ? pSQL($_POST['email']) : false,
						'nw_error' => true,
						'action' => $_POST['action']
					)
				);
			}
			else if ($this->valid)
			{
				$this->smarty->assign(
					array(
						'color' => 'green',
						'msg' => $this->valid,
						'nw_error' => false
					)
				);
			}
		}
		$this->smarty->assign('this_path', $this->_path);
	}

	public function hookDisplayLeftColumn($params)
	{
		if (!isset($this->prepared) || !$this->prepared)
			$this->_prepareHook($params);
		$this->prepared = true;
		return $this->display(__FILE__, 'blocknewsletter.tpl');
	}

	public function hookFooter($params)
	{
		return $this->hookDisplayLeftColumn($params);
	}

	public function hookdisplayMaintenance($params)
	{
		return $this->hookDisplayLeftColumn($params);
	}

	public function hookDisplayHeader($params)
	{
		$this->context->controller->addCSS($this->_path.'blocknewsletter.css', 'all');
		$this->context->controller->addJS($this->_path.'blocknewsletter.js');
	}

	/**
	 * Deletes duplicates email in newsletter table
	 *
	 * @param $params
	 *
	 * @return bool
	 */
	public function hookActionCustomerAccountAdd($params)
	{
		//if e-mail of the created user address has already been added to the newsletter through the blocknewsletter module,
		//we delete it from blocknewsletter table to prevent duplicates
		$id_shop = $params['newCustomer']->id_shop;
		$email = $params['newCustomer']->email;
		if (Validate::isEmail($email))
			return (bool)Db::getInstance()->execute('DELETE FROM '._DB_PREFIX_.'newsletter WHERE id_shop='.(int)$id_shop.' AND email=\''.pSQL($email)."'");

		return true;
	}

	public function renderForm()
	{
		$fields_form = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Settings'),
					'icon' => 'icon-cogs'
				),
				'input' => array(
					array(
						'type' => 'switch',
						'label' => $this->l('Would you like to send a verification email after subscription?'),
						'name' => 'NW_VERIFICATION_EMAIL',
						'values' => array(
							array(
								'id' => 'active_on',
								'value' => 1,
								'label' => $this->l('Yes')
							),
							array(
								'id' => 'active_off',
								'value' => 0,
								'label' => $this->l('No')
							)
						),
					),
					array(
						'type' => 'switch',
						'label' => $this->l('Would you like to send a confirmation email after subscription?'),
						'name' => 'NW_CONFIRMATION_EMAIL',
						'values' => array(
							array(
								'id' => 'active_on',
								'value' => 1,
								'label' => $this->l('Yes')
							),
							array(
								'id' => 'active_off',
								'value' => 0,
								'label' => $this->l('No')
							)
						),
					),
					array(
						'type' => 'text',
						'label' => $this->l('Welcome voucher code'),
						'name' => 'NW_VOUCHER_CODE',
						'class' => 'fixed-width-md',
						'desc' => $this->l('Leave blank to disable by default.')
					),
				),
				'submit' => array(
					'title' => $this->l('Save'),
				)
			),
		);

		$helper = new HelperForm();
		$helper->show_toolbar = false;
		$helper->table = $this->table;
		$lang = new Language((int)Configuration::get('PS_LANG_DEFAULT'));
		$helper->default_form_language = $lang->id;
		$helper->allow_employee_form_lang = Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') ? Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') : 0;
		$helper->identifier = $this->identifier;
		$helper->submit_action = 'submitUpdate';
		$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' => $this->getConfigFieldsValues(),
			'languages' => $this->context->controller->getLanguages(),
			'id_language' => $this->context->language->id
		);

		return $helper->generateForm(array($fields_form));
	}

	public function renderExportForm()
	{
		// Getting data...
		$countries = Country::getCountries($this->context->language->id);

		// ...formatting array
		$countries_list = array(array('id' => 0, 'name' => $this->l('All countries')));
		foreach ($countries as $country)
			$countries_list[] = array('id' => $country['id_country'], 'name' => $country['name']);

		$fields_form = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Export customers\' addresses'),
					'icon' => 'icon-envelope'
				),
				'input' => array(
					array(
						'type' => 'select',
						'label' => $this->l('Customers\' country'),
						'desc' => $this->l('Filter customers by country.'),
						'name' => 'COUNTRY',
						'required' => false,
						'default_value' => (int)$this->context->country->id,
						'options' => array(
							'query' => $countries_list,
							'id' => 'id',
							'name' => 'name',
						)
					),
					array(
						'type' => 'select',
						'label' => $this->l('Newsletter subscribers'),
						'desc' => $this->l('Filter customers who have subscribed to the newsletter or not, and who have an account or not.'),
						'hint' => $this->l('Customers can subscribe to your newsletter when registering, or by entering their email in the newsletter block.'),
						'name' => 'SUSCRIBERS',
						'required' => false,
						'default_value' => (int)$this->context->country->id,
						'options' => array(
							'query' => array(
								array('id' => 0, 'name' => $this->l('All subscribers')),
								array('id' => 1, 'name' => $this->l('Subscribers with account')),
								array('id' => 2, 'name' => $this->l('Subscribers without account')),
								array('id' => 3, 'name' => $this->l('Non-subscribers'))
							),
							'id' => 'id',
							'name' => 'name',
						)
					),
					array(
						'type' => 'select',
						'label' => $this->l('Opt-in subscribers'),
						'desc' => $this->l('Filter customers who have agreed to receive your partners\' offers or not.'),
						'hint' => $this->l('Opt-in subscribers have agreed to receive your partners\' offers.'),
						'name' => 'OPTIN',
						'required' => false,
						'default_value' => (int)$this->context->country->id,
						'options' => array(
							'query' => array(
								array('id' => 0, 'name' => $this->l('All customers')),
								array('id' => 2, 'name' => $this->l('Opt-in subscribers')),
								array('id' => 1, 'name' => $this->l('Opt-in non-subscribers'))
							),
							'id' => 'id',
							'name' => 'name',
						)
					),
					array(
						'type' => 'hidden',
						'name' => 'action',
					)
				),
				'submit' => array(
					'title' => $this->l('Export .CSV file'),
					'class' => 'btn btn-default pull-right',
					'name' => 'submitExport',
				)
			),
		);

		$helper = new HelperForm();
		$helper->show_toolbar = false;
		$helper->table = $this->table;
		$lang = new Language((int)Configuration::get('PS_LANG_DEFAULT'));
		$helper->default_form_language = $lang->id;
		$helper->allow_employee_form_lang = Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') ? Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') : 0;
		$helper->id = (int)Tools::getValue('id_carrier');
		$helper->identifier = $this->identifier;
		$helper->submit_action = 'btnSubmit';
		$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' => $this->getConfigFieldsValues(),
			'languages' => $this->context->controller->getLanguages(),
			'id_language' => $this->context->language->id
		);

		return $helper->generateForm(array($fields_form));
	}

	public function renderSearchForm()
	{
				$fields_form = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Search for addresses'),
					'icon' => 'icon-search'
				),
				'input' => array(
					array(
						'type' => 'text',
						'label' => $this->l('Email address to search'),
						'name' => 'searched_email',
						'class' => 'fixed-width-xxl',
						'desc' => $this->l('Example: contact@prestashop.com or @prestashop.com')
					),
				),
				'submit' => array(
					'title' => $this->l('Search'),
					'icon' => 'process-icon-refresh',
				)
			),
		);

		$helper = new HelperForm();
		$helper->table = $this->table;
		$helper->identifier = $this->identifier;
		$helper->submit_action = 'searchEmail';
		$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' => array('searched_email' => $this->_searched_email),
			'languages' => $this->context->controller->getLanguages(),
			'id_language' => $this->context->language->id
		);

		return $helper->generateForm(array($fields_form));
	}

	public function getConfigFieldsValues()
	{
		return array(
			'NW_VERIFICATION_EMAIL' => Tools::getValue('NW_VERIFICATION_EMAIL', Configuration::get('NW_VERIFICATION_EMAIL')),
			'NW_CONFIRMATION_EMAIL' => Tools::getValue('NW_CONFIRMATION_EMAIL', Configuration::get('NW_CONFIRMATION_EMAIL')),
			'NW_VOUCHER_CODE' => Tools::getValue('NW_VOUCHER_CODE', Configuration::get('NW_VOUCHER_CODE')),
			'COUNTRY' => Tools::getValue('COUNTRY'),
			'SUSCRIBERS' => Tools::getValue('SUSCRIBERS'),
			'OPTIN' => Tools::getValue('OPTIN'),
			'action' => 'customers',
		);
	}

	public function export_csv()
	{
		if (!isset($this->context))
			$this->context = Context::getContext();

		$result = $this->getCustomers();

		if ($result)
		{
			if (!$nb = count($result))
				$this->_html .= $this->displayError($this->l('No customers found with these filters!'));
			elseif ($fd = @fopen(dirname(__FILE__).'/'.strval(preg_replace('#\.{2,}#', '.', Tools::getValue('action'))).'_'.$this->file, 'w'))
			{
				$header = array('id', 'shop_name', 'gender', 'lastname', 'firstname', 'email', 'subscribed', 'subscribed_on');
				$array_to_export = array_merge(array($header), $result);
				foreach ($array_to_export as $tab)
					$this->myFputCsv($fd, $tab);
				fclose($fd);
				$this->_html .= $this->displayConfirmation(
					sprintf($this->l('The .CSV file has been successfully exported: %d customers found.'), $nb).'<br />
				<a href="'.$this->context->shop->getBaseURI().'modules/blocknewsletter/'.Tools::safeOutput(strval(Tools::getValue('action'))).'_'.$this->file.'">
				<b>'.$this->l('Download the file').' '.$this->file.'</b>
				</a>
				<br />
				<ol style="margin-top: 10px;">
					<li style="color: red;">'.
					$this->l('WARNING: When opening this .csv file with Excel, choose UTF-8 encoding to avoid strange characters.').
					'</li>
				</ol>');
			}
			else
				$this->_html .= $this->displayError($this->l('Error: Write access limited').' '.dirname(__FILE__).'/'.strval(Tools::getValue('action')).'_'.$this->file.' !');
		}
		else
			$this->_html .= $this->displayError($this->l('No result found!'));
	}

	private function getCustomers()
	{
		$id_shop = false;

		// Get the value to know with subscrib I need to take 1 with account 2 without 0 both 3 not subscrib
		$who = (int)Tools::getValue('SUSCRIBERS');

		// get optin 0 for all 1 no optin 2 with optin
		$optin = (int)Tools::getValue('OPTIN');

		$country = (int)Tools::getValue('COUNTRY');

		if (Context::getContext()->cookie->shopContext)
			$id_shop = (int)Context::getContext()->shop->id;

		$customers = array();
		if ($who == 1 || $who == 0 || $who == 3)
		{
			$dbquery = new DbQuery();
			$dbquery->select('c.`id_customer` AS `id`, s.`name` AS `shop_name`, gl.`name` AS `gender`, c.`lastname`, c.`firstname`, c.`email`, c.`newsletter` AS `subscribed`, c.`newsletter_date_add`');
			$dbquery->from('customer', 'c');
			$dbquery->leftJoin('shop', 's', 's.id_shop = c.id_shop');
			$dbquery->leftJoin('gender', 'g', 'g.id_gender = c.id_gender');
			$dbquery->leftJoin('gender_lang', 'gl', 'g.id_gender = gl.id_gender AND gl.id_lang = '.$this->context->employee->id_lang);
			$dbquery->where('c.`newsletter` = '.($who == 3 ? 0 : 1));
			if ($optin == 2 || $optin == 1)
				$dbquery->where('c.`optin` = '.($optin == 1 ? 0 : 1));
			if ($country)
				$dbquery->where('(SELECT COUNT(a.`id_address`) as nb_country
													FROM `'._DB_PREFIX_.'address` a
													WHERE a.deleted = 0
													AND a.`id_customer` = c.`id_customer`
													AND a.`id_country` = '.$country.') >= 1');
			if ($id_shop)
				$dbquery->where('c.`id_shop` = '.$id_shop);

			$customers = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($dbquery->build());
		}

		$non_customers = array();
		if (($who == 0 || $who == 2) && (!$optin || $optin == 2) && !$country)
		{
			$dbquery = new DbQuery();
			$dbquery->select('CONCAT(\'N\', n.`id`) AS `id`, s.`name` AS `shop_name`, NULL AS `gender`, NULL AS `lastname`, NULL AS `firstname`, n.`email`, n.`active` AS `subscribed`, n.`newsletter_date_add`');
			$dbquery->from('newsletter', 'n');
			$dbquery->leftJoin('shop', 's', 's.id_shop = n.id_shop');
			$dbquery->where('n.`active` = 1');
			if ($id_shop)
				$dbquery->where('n.`id_shop` = '.$id_shop);
			$non_customers = Db::getInstance()->executeS($dbquery->build());
		}

		$subscribers = array_merge($customers, $non_customers);

		return $subscribers;
	}

	private function myFputCsv($fd, $array)
	{
		$line = implode(';', $array);
		$line .= "\n";
		if (!fwrite($fd, $line, 4096))
			$this->post_errors[] = $this->l('Error: Write access limited').' '.dirname(__FILE__).'/'.$this->file.' !';
	}
}