<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
namespace Fisharebest\Webtrees;

use Exception;
use Swift_Mailer;
use Swift_MailTransport;
use Swift_Message;
use Swift_NullTransport;
use Swift_Preferences;
use Swift_SendmailTransport;
use Swift_SmtpTransport;
use Swift_Transport;

/**
 * Send mail messages.
 */
class Mail {
	/**
	 * Send an external email message
	 * Caution! gmail may rewrite the "From" header unless you have added the address to your account.
	 *
	 * @param User   $from
	 * @param User   $to
	 * @param User   $reply_to
	 * @param string $subject
	 * @param string $message_text
	 * @param string $message_html
	 *
	 * @return bool
	 */
	public static function send(User $from, User $to, User $reply_to, $subject, $message_text, $message_html) {
		try {
			// Swiftmailer uses the PHP default tmp directory.  On some servers, this
			// is outside the open_basedir list.  Therefore we must set one explicitly.
			File::mkdir(WT_DATA_DIR . 'tmp');
			Swift_Preferences::getInstance()->setTempDir(WT_DATA_DIR . 'tmp');

			$message_text = preg_replace('/\r?\n/', "\r\n", $message_text);
			$message_html = preg_replace('/\r?\n/', "\r\n", $message_html);

			$message = Swift_Message::newInstance()
				->setSubject($subject)
				->setFrom($from->getEmail(), $from->getRealName())
				->setTo($to->getEmail(), $to->getRealName())
				->setReplyTo($reply_to->getEmail(), $reply_to->getRealName())
				->setBody($message_html, 'text/html')
				->addPart($message_text, 'text/plain');

			Swift_Mailer::newInstance(self::transport())->send($message);
		} catch (Exception $ex) {
			DebugBar::addThrowable($ex);

			Log::addErrorLog('Mail: ' . $ex->getMessage());

			return false;
		}

		return true;
	}

	/**
	 * Create a transport mechanism for sending mail
	 *
	 * @return Swift_Transport
	 */
	public static function transport() {
		switch (Site::getPreference('SMTP_ACTIVE')) {
			case 'internal':
				return Swift_MailTransport::newInstance();
			case 'sendmail':
				return Swift_SendmailTransport::newInstance();
			case 'external':
				$transport = Swift_SmtpTransport::newInstance()
					->setHost(Site::getPreference('SMTP_HOST'))
					->setPort(Site::getPreference('SMTP_PORT'))
					->setLocalDomain(Site::getPreference('SMTP_HELO'));

				if (Site::getPreference('SMTP_AUTH') === '1') {
					$transport
						->setUsername(Site::getPreference('SMTP_AUTH_USER'))
						->setPassword(Site::getPreference('SMTP_AUTH_PASS'));
				}

				if (Site::getPreference('SMTP_SSL') !== 'none') {
					$transport->setEncryption(Site::getPreference('SMTP_SSL'));
				}

				return $transport;
			default:
				// For testing
				return Swift_NullTransport::newInstance();
		}
	}
}
