<?php
/*
* 2007-2014 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 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/osl-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  2007-2014 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

include_once(_PS_SWIFT_DIR_.'Swift.php');
include_once(_PS_SWIFT_DIR_.'Swift/Connection/SMTP.php');
include_once(_PS_SWIFT_DIR_.'Swift/Connection/NativeMail.php');
include_once(_PS_SWIFT_DIR_.'Swift/Plugin/Decorator.php');

class MailCore
{
	const TYPE_HTML = 1;
	const TYPE_TEXT = 2;
	const TYPE_BOTH = 3;

	/**
	 * Send Email
	 * 
	 * @param int $id_lang Language of the email (to translate the template)
	 * @param string $template Template: the name of template not be a var but a string !
	 * @param string $subject
	 * @param string $template_vars
	 * @param string $to
	 * @param string $to_name
	 * @param string $from
	 * @param string $from_name
	 * @param array $file_attachment Array with three parameters (content, mime and name). You can use an array of array to attach multiple files
	 * @param bool $modeSMTP
	 * @param string $template_path
	 * @param bool $die
         * @param string $bcc Bcc recipient
	 */
	public static function Send($id_lang, $template, $subject, $template_vars, $to,
		$to_name = null, $from = null, $from_name = null, $file_attachment = null, $mode_smtp = null,
		$template_path = _PS_MAIL_DIR_, $die = false, $id_shop = null, $bcc = null)
	{
		$configuration = Configuration::getMultiple(array(
			'PS_SHOP_EMAIL',
			'PS_MAIL_METHOD',
			'PS_MAIL_SERVER',
			'PS_MAIL_USER',
			'PS_MAIL_PASSWD',
			'PS_SHOP_NAME',
			'PS_MAIL_SMTP_ENCRYPTION',
			'PS_MAIL_SMTP_PORT',
			'PS_MAIL_TYPE'
		), null, null, $id_shop);
		
		// Returns immediatly if emails are deactivated
		if ($configuration['PS_MAIL_METHOD'] == 3)
			return true;
		
		$theme_path = _PS_THEME_DIR_;

		// Get the path of theme by id_shop if exist
		if (is_numeric($id_shop) && $id_shop)
		{
			$shop = new Shop((int)$id_shop);
			$theme_name = $shop->getTheme();

			if (_THEME_NAME_ != $theme_name)
				$theme_path = _PS_ROOT_DIR_.'/themes/'.$theme_name.'/';
		}

		if (!isset($configuration['PS_MAIL_SMTP_ENCRYPTION']))
			$configuration['PS_MAIL_SMTP_ENCRYPTION'] = 'off';
		if (!isset($configuration['PS_MAIL_SMTP_PORT']))
			$configuration['PS_MAIL_SMTP_PORT'] = 'default';

		// Sending an e-mail can be of vital importance for the merchant, when his password is lost for example, so we must not die but do our best to send the e-mail
		if (!isset($from) || !Validate::isEmail($from))
			$from = $configuration['PS_SHOP_EMAIL'];
		if (!Validate::isEmail($from))
			$from = null;

		// $from_name is not that important, no need to die if it is not valid
		if (!isset($from_name) || !Validate::isMailName($from_name))
			$from_name = $configuration['PS_SHOP_NAME'];
		if (!Validate::isMailName($from_name))
			$from_name = null;

		// It would be difficult to send an e-mail if the e-mail is not valid, so this time we can die if there is a problem
		if (!is_array($to) && !Validate::isEmail($to))
		{
			Tools::dieOrLog(Tools::displayError('Error: parameter "to" is corrupted'), $die);
			return false;
		}

		if (!is_array($template_vars))
			$template_vars = array();

		// Do not crash for this error, that may be a complicated customer name
		if (is_string($to_name) && !empty($to_name) && !Validate::isMailName($to_name))
			$to_name = null;

		if (!Validate::isTplName($template))
		{
			Tools::dieOrLog(Tools::displayError('Error: invalid e-mail template'), $die);
			return false;
		}

		if (!Validate::isMailSubject($subject))
		{
			Tools::dieOrLog(Tools::displayError('Error: invalid e-mail subject'), $die);
			return false;
		}

		/* Construct multiple recipients list if needed */
		$to_list = new Swift_RecipientList();
		if (is_array($to) && isset($to))
		{
			foreach ($to as $key => $addr)
			{
				$addr = trim($addr);
				if (!Validate::isEmail($addr))
				{
					Tools::dieOrLog(Tools::displayError('Error: invalid e-mail address'), $die);
					return false;
				}

				if (is_array($to_name))
				{
					if ($to_name && is_array($to_name) && Validate::isGenericName($to_name[$key]))
						$to_name = $to_name[$key];
				}

				if ($to_name == null || $to_name == $addr)
					$to_name = '';
				else
				{
					if (function_exists('mb_encode_mimeheader'))
						$to_name = mb_encode_mimeheader($to_name, 'utf-8');
					else
						$to_name = self::mimeEncode($to_name);
				}

				$to_list->addTo($addr, $to_name);
			}
			$to_plugin = $to[0];
		} else {
			/* Simple recipient, one address */
			$to_plugin = $to;
			if ($to_name == null || $to_name == $to)
				$to_name = '';
			else
			{
				if (function_exists('mb_encode_mimeheader'))
					$to_name = mb_encode_mimeheader($to_name, 'utf-8');
				else
					$to_name = self::mimeEncode($to_name);
			}

			$to_list->addTo($to, $to_name);
		}
		if(isset($bcc)) {
			$to_list->addBcc($bcc);
		}
		$to = $to_list;
		try {
			/* Connect with the appropriate configuration */
			if ($configuration['PS_MAIL_METHOD'] == 2)
			{
				if (empty($configuration['PS_MAIL_SERVER']) || empty($configuration['PS_MAIL_SMTP_PORT']))
				{
					Tools::dieOrLog(Tools::displayError('Error: invalid SMTP server or SMTP port'), $die);
					return false;
				}
				$connection = new Swift_Connection_SMTP($configuration['PS_MAIL_SERVER'], $configuration['PS_MAIL_SMTP_PORT'],
					($configuration['PS_MAIL_SMTP_ENCRYPTION'] == 'ssl') ? Swift_Connection_SMTP::ENC_SSL :
					(($configuration['PS_MAIL_SMTP_ENCRYPTION'] == 'tls') ? Swift_Connection_SMTP::ENC_TLS : Swift_Connection_SMTP::ENC_OFF));
				$connection->setTimeout(4);
				if (!$connection)
					return false;
				if (!empty($configuration['PS_MAIL_USER']))
					$connection->setUsername($configuration['PS_MAIL_USER']);
				if (!empty($configuration['PS_MAIL_PASSWD']))
					$connection->setPassword($configuration['PS_MAIL_PASSWD']);
			}
			else
				$connection = new Swift_Connection_NativeMail();

			if (!$connection)
				return false;
			$swift = new Swift($connection, Configuration::get('PS_MAIL_DOMAIN', null, null, $id_shop));
			/* Get templates content */
			$iso = Language::getIsoById((int)$id_lang);
			if (!$iso)
			{
				Tools::dieOrLog(Tools::displayError('Error - No ISO code for email'), $die);
				return false;
			}
			$template = $iso.'/'.$template;

			$module_name = false;
			$override_mail = false;

			// get templatePath
			if (preg_match('#'.__PS_BASE_URI__.'modules/#', str_replace(DIRECTORY_SEPARATOR, '/', $template_path)) && preg_match('#modules/([a-z0-9_-]+)/#ui', str_replace(DIRECTORY_SEPARATOR, '/',$template_path), $res))
				$module_name = $res[1];

			if ($module_name !== false && (file_exists($theme_path.'modules/'.$module_name.'/mails/'.$template.'.txt') ||
				file_exists($theme_path.'modules/'.$module_name.'/mails/'.$template.'.html')))
				$template_path = $theme_path.'modules/'.$module_name.'/mails/';
			elseif (file_exists($theme_path.'mails/'.$template.'.txt') || file_exists($theme_path.'mails/'.$template.'.html'))
			{
				$template_path = $theme_path.'mails/';
				$override_mail  = true;
			}
			if (!file_exists($template_path.$template.'.txt') && ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_TEXT))
			{
				Tools::dieOrLog(Tools::displayError('Error - The following e-mail template is missing:').' '.$template_path.$template.'.txt', $die);
				return false;
			}
			else if (!file_exists($template_path.$template.'.html') && ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_HTML))
			{
				Tools::dieOrLog(Tools::displayError('Error - The following e-mail template is missing:').' '.$template_path.$template.'.html', $die);
				return false;
			}
			$template_html = file_get_contents($template_path.$template.'.html');
			$template_txt = strip_tags(html_entity_decode(file_get_contents($template_path.$template.'.txt'), null, 'utf-8'));

			if ($override_mail && file_exists($template_path.$iso.'/lang.php'))
					include_once($template_path.$iso.'/lang.php');
			else if ($module_name && file_exists($theme_path.'mails/'.$iso.'/lang.php'))
				include_once($theme_path.'mails/'.$iso.'/lang.php');
			else if (file_exists(_PS_MAIL_DIR_.$iso.'/lang.php'))
				include_once(_PS_MAIL_DIR_.$iso.'/lang.php');
			else
			{
				Tools::dieOrLog(Tools::displayError('Error - The lang file is missing for :').' '.$iso, $die);
				return false;
			}

			/* Create mail and attach differents parts */
			$message = new Swift_Message('['.Configuration::get('PS_SHOP_NAME', null, null, $id_shop).'] '.$subject);

			$message->setCharset('utf-8');

			/* Set Message-ID - getmypid() is blocked on some hosting */
			$message->setId(Mail::generateId());

			$message->headers->setEncoding('Q');

			if (Configuration::get('PS_LOGO_MAIL') !== false && file_exists(_PS_IMG_DIR_.Configuration::get('PS_LOGO_MAIL', null, null, $id_shop)))
				$logo = _PS_IMG_DIR_.Configuration::get('PS_LOGO_MAIL', null, null, $id_shop);
			else
			{
				if (file_exists(_PS_IMG_DIR_.Configuration::get('PS_LOGO', null, null, $id_shop)))
					$logo = _PS_IMG_DIR_.Configuration::get('PS_LOGO', null, null, $id_shop);
				else
					$template_vars['{shop_logo}'] = '';
			}
			ShopUrl::cacheMainDomainForShop((int)$id_shop);
			/* don't attach the logo as */
			if (isset($logo))
				$template_vars['{shop_logo}'] = $message->attach(new Swift_Message_EmbeddedFile(new Swift_File($logo), null, ImageManager::getMimeTypeByExtension($logo)));

			if ((Context::getContext()->link instanceof Link) === false)
				Context::getContext()->link = new Link();

			$template_vars['{shop_name}'] = Tools::safeOutput(Configuration::get('PS_SHOP_NAME', null, null, $id_shop));
			$template_vars['{shop_url}'] = Context::getContext()->link->getPageLink('index', true, Context::getContext()->language->id);
			$template_vars['{my_account_url}'] = Context::getContext()->link->getPageLink('my-account', true, Context::getContext()->language->id);
			$template_vars['{guest_tracking_url}'] = Context::getContext()->link->getPageLink('guest-tracking', true, Context::getContext()->language->id);
			$template_vars['{history_url}'] = Context::getContext()->link->getPageLink('history', true, Context::getContext()->language->id);
			$template_vars['{color}'] = Tools::safeOutput(Configuration::get('PS_MAIL_COLOR', null, null, $id_shop));
			$swift->attachPlugin(new Swift_Plugin_Decorator(array($to_plugin => $template_vars)), 'decorator');
			if ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_TEXT)
				$message->attach(new Swift_Message_Part($template_txt, 'text/plain', '8bit', 'utf-8'));
			if ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_HTML)
				$message->attach(new Swift_Message_Part($template_html, 'text/html', '8bit', 'utf-8'));
			if ($file_attachment && !empty($file_attachment))
			{
				// Multiple attachments?
				if (!is_array(current($file_attachment)))
					$file_attachment = array($file_attachment);

				foreach ($file_attachment as $attachment)
					if (isset($attachment['content']) && isset($attachment['name']) && isset($attachment['mime']))
						$message->attach(new Swift_Message_Attachment($attachment['content'], $attachment['name'], $attachment['mime']));
			}
			/* Send mail */
			$send = $swift->send($message, $to, new Swift_Address($from, $from_name));
			$swift->disconnect();

			ShopUrl::resetMainDomainCache();			

			return $send;
		}
		catch (Swift_Exception $e) {
			return false;
		}
	}

	public static function sendMailTest($smtpChecked, $smtpServer, $content, $subject, $type, $to, $from, $smtpLogin, $smtpPassword, $smtpPort = 25, $smtpEncryption)
	{
		$swift = null;
		$result = false;
		try
		{
			if ($smtpChecked)
			{
				$smtp = new Swift_Connection_SMTP($smtpServer, $smtpPort, ($smtpEncryption == 'off') ? 
					Swift_Connection_SMTP::ENC_OFF : (($smtpEncryption == 'tls') ? Swift_Connection_SMTP::ENC_TLS : Swift_Connection_SMTP::ENC_SSL));
				$smtp->setUsername($smtpLogin);
				$smtp->setpassword($smtpPassword);
				$smtp->setTimeout(5);
				$swift = new Swift($smtp, Configuration::get('PS_MAIL_DOMAIN'));
			}
			else
				$swift = new Swift(new Swift_Connection_NativeMail(), Configuration::get('PS_MAIL_DOMAIN'));

			$message = new Swift_Message($subject, $content, $type);

			if ($swift->send($message, $to, $from))
				$result = true;

			$swift->disconnect();
		}
		catch (Swift_ConnectionException $e)
		{
			$result = $e->getMessage();
		}
		catch (Swift_Message_MimeException $e)
		{
			$result = $e->getMessage();
		}

		return $result;
	}

	/**
	 * This method is used to get the translation for email Object.
	 * For an object is forbidden to use htmlentities,
	 * we have to return a sentence with accents.
	 * 
	 * @param string $string raw sentence (write directly in file)
	 */
	public static function l($string, $id_lang = null, Context $context = null)
	{
		global $_LANGMAIL;
		if (!$context)
			$context = Context::getContext();

		$key = str_replace('\'', '\\\'', $string);
		if ($id_lang == null)
			$id_lang = (!isset($context->language) || !is_object($context->language)) ? (int)Configuration::get('PS_LANG_DEFAULT') : (int)$context->language->id;

		$iso_code = Language::getIsoById((int)$id_lang);

		$file_core = _PS_ROOT_DIR_.'/mails/'.$iso_code.'/lang.php';
		if (Tools::file_exists_cache($file_core) && empty($_LANGMAIL))
			include_once($file_core);

		$file_theme = _PS_THEME_DIR_.'mails/'.$iso_code.'/lang.php';
		if (Tools::file_exists_cache($file_theme))
			include_once($file_theme);

		if (!is_array($_LANGMAIL))
			return (str_replace('"', '&quot;', $string));
		if (array_key_exists($key, $_LANGMAIL) && !empty($_LANGMAIL[$key]))
			$str = $_LANGMAIL[$key];
		else
			$str = $string;

		return str_replace('"', '&quot;', stripslashes($str));
	}

	/* Rewrite of Swift_Message::generateId() without getmypid() */
	protected static function generateId($idstring = null)
	{
		$midparams =  array(
			"utctime" => gmstrftime("%Y%m%d%H%M%S"),
			"randint" => mt_rand(),
			"customstr" => (preg_match("/^(?<!\\.)[a-z0-9\\.]+(?!\\.)\$/iD", $idstring) ? $idstring : "swift") ,
			"hostname" => (isset($_SERVER["SERVER_NAME"]) ? $_SERVER["SERVER_NAME"] : php_uname("n")),
		);
		return vsprintf("<%s.%d.%s@%s>", $midparams);
	}
	
	public static function isMultibyte($data)
	{
		$length = strlen($data);

		for ($i = 0; $i < $length; $i++)
		{
			$result = ord(($data[$i]));

			if ($result > 128)
			{
				return true;
			}
		}

		return false;
	}

	public static function mimeEncode($string, $charset = 'UTF-8', $newline = "\r\n")
	{
		if (!self::isMultibyte($string) && strlen($string) < 75)
		{
			return $string;
		}

		$charset = strtoupper($charset);
		$start   = '=?' . $charset . '?B?';
		$end     = '?=';
		$sep     = $end . $newline . ' ' . $start;
		$length  = 75 - strlen($start) - strlen($end);
		$length  = $length - ($length % 4);

		if ($charset === 'UTF-8')
		{
			$parts = array();
			$maxchars = floor(($length * 3) / 4);
			$stringLength = strlen($string);

			while ($stringLength > $maxchars)
			{
				$i = (int)$maxchars;
				$result = ord($string[$i]);

				while ($result >= 128 && $result <= 191)
				{
					$i--;
					$result = ord($string[$i]);
				}

				$parts[] = base64_encode(substr($string, 0, $i));
				$string = substr($string, $i);
				$stringLength = strlen($string);
			}

			$parts[] = base64_encode($string);
			$string = implode($sep, $parts);
		}
		else
		{
			$string = chunk_split(base64_encode($string), $length, $sep);
			$string = preg_replace('/' . preg_quote($sep) . '$/', '', $string);
		}

		return $start . $string . $end;
	}
}
