459 lines
14 KiB
PHP
459 lines
14 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @copyright Copyright (c) 2017, Georg Ehrke
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*
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Georg Ehrke <oc.list@georgehrke.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\DAV\CalDAV\Schedule;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\IConfig;
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use OCP\IL10N;
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use OCP\ILogger;
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use OCP\IURLGenerator;
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use OCP\L10N\IFactory as L10NFactory;
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use OCP\Mail\IEMailTemplate;
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use OCP\Mail\IMailer;
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use Sabre\CalDAV\Schedule\IMipPlugin as SabreIMipPlugin;
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use Sabre\DAV\Xml\Element\Prop;
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use Sabre\VObject\Component\VCalendar;
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use Sabre\VObject\Component\VEvent;
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use Sabre\VObject\DateTimeParser;
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use Sabre\VObject\ITip\Message;
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use Sabre\VObject\Parameter;
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use Sabre\VObject\Property;
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use Sabre\VObject\Recur\EventIterator;
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/**
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* iMIP handler.
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*
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* This class is responsible for sending out iMIP messages. iMIP is the
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* email-based transport for iTIP. iTIP deals with scheduling operations for
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* iCalendar objects.
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*
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* If you want to customize the email that gets sent out, you can do so by
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* extending this class and overriding the sendMessage method.
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*
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* @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
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* @author Evert Pot (http://evertpot.com/)
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* @license http://sabre.io/license/ Modified BSD License
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*/
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class IMipPlugin extends SabreIMipPlugin {
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/** @var string */
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private $userId;
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/** @var IConfig */
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private $config;
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/** @var IMailer */
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private $mailer;
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/** @var ILogger */
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private $logger;
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/** @var ITimeFactory */
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private $timeFactory;
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/** @var L10NFactory */
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private $l10nFactory;
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/** @var IURLGenerator */
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private $urlGenerator;
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const MAX_DATE = '2038-01-01';
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const METHOD_REQUEST = 'request';
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const METHOD_REPLY = 'reply';
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const METHOD_CANCEL = 'cancel';
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/**
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* @param IConfig $config
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* @param IMailer $mailer
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* @param ILogger $logger
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* @param ITimeFactory $timeFactory
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* @param L10NFactory $l10nFactory
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* @param IUrlGenerator $urlGenerator
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* @param string $userId
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*/
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public function __construct(IConfig $config, IMailer $mailer, ILogger $logger, ITimeFactory $timeFactory, L10NFactory $l10nFactory, IURLGenerator $urlGenerator, $userId) {
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parent::__construct('');
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$this->userId = $userId;
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$this->config = $config;
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$this->mailer = $mailer;
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$this->logger = $logger;
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$this->timeFactory = $timeFactory;
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$this->l10nFactory = $l10nFactory;
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$this->urlGenerator = $urlGenerator;
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}
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/**
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* Event handler for the 'schedule' event.
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*
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* @param Message $iTipMessage
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* @return void
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*/
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public function schedule(Message $iTipMessage) {
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// Not sending any emails if the system considers the update
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// insignificant.
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if (!$iTipMessage->significantChange) {
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if (!$iTipMessage->scheduleStatus) {
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$iTipMessage->scheduleStatus = '1.0;We got the message, but it\'s not significant enough to warrant an email';
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}
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return;
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}
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$summary = $iTipMessage->message->VEVENT->SUMMARY;
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if (parse_url($iTipMessage->sender, PHP_URL_SCHEME) !== 'mailto') {
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return;
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}
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if (parse_url($iTipMessage->recipient, PHP_URL_SCHEME) !== 'mailto') {
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return;
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}
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// don't send out mails for events that already took place
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if ($this->isEventInThePast($iTipMessage->message)) {
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return;
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}
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// Strip off mailto:
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$sender = substr($iTipMessage->sender, 7);
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$recipient = substr($iTipMessage->recipient, 7);
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$senderName = $iTipMessage->senderName ?: null;
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$recipientName = $iTipMessage->recipientName ?: null;
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/** @var VEvent $vevent */
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$vevent = $iTipMessage->message->VEVENT;
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$attendee = $this->getCurrentAttendee($iTipMessage);
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$defaultLang = $this->config->getUserValue($this->userId, 'core', 'lang', $this->l10nFactory->findLanguage());
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$lang = $this->getAttendeeLangOrDefault($defaultLang, $attendee);
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$l10n = $this->l10nFactory->get('dav', $lang);
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$meetingAttendeeName = $recipientName ?: $recipient;
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$meetingInviteeName = $senderName ?: $sender;
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$meetingTitle = $vevent->SUMMARY;
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$meetingDescription = $vevent->DESCRIPTION;
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$start = $vevent->DTSTART;
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if (isset($vevent->DTEND)) {
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$end = $vevent->DTEND;
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} elseif (isset($vevent->DURATION)) {
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$isFloating = $vevent->DTSTART->isFloating();
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$end = clone $vevent->DTSTART;
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$endDateTime = $end->getDateTime();
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$endDateTime = $endDateTime->add(DateTimeParser::parse($vevent->DURATION->getValue()));
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$end->setDateTime($endDateTime, $isFloating);
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} elseif (!$vevent->DTSTART->hasTime()) {
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$isFloating = $vevent->DTSTART->isFloating();
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$end = clone $vevent->DTSTART;
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$endDateTime = $end->getDateTime();
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$endDateTime = $endDateTime->modify('+1 day');
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$end->setDateTime($endDateTime, $isFloating);
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} else {
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$end = clone $vevent->DTSTART;
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}
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$meetingWhen = $this->generateWhenString($l10n, $start, $end);
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$meetingUrl = $vevent->URL;
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$meetingLocation = $vevent->LOCATION;
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$defaultVal = '--';
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$method = self::METHOD_REQUEST;
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switch (strtolower($iTipMessage->method)) {
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case self::METHOD_REPLY:
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$method = self::METHOD_REPLY;
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break;
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case self::METHOD_CANCEL:
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$method = self::METHOD_CANCEL;
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break;
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}
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$data = array(
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'attendee_name' => (string)$meetingAttendeeName ?: $defaultVal,
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'invitee_name' => (string)$meetingInviteeName ?: $defaultVal,
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'meeting_title' => (string)$meetingTitle ?: $defaultVal,
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'meeting_description' => (string)$meetingDescription ?: $defaultVal,
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'meeting_url' => (string)$meetingUrl ?: $defaultVal,
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);
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$message = $this->mailer->createMessage()
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->setReplyTo([$sender => $senderName])
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->setTo([$recipient => $recipientName]);
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$template = $this->mailer->createEMailTemplate('dav.calendarInvite.' . $method, $data);
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$template->addHeader();
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$this->addSubjectAndHeading($template, $l10n, $method, $summary,
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$meetingAttendeeName, $meetingInviteeName);
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$this->addBulletList($template, $l10n, $meetingWhen, $meetingLocation,
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$meetingDescription, $meetingUrl);
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$template->addFooter();
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$message->useTemplate($template);
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$attachment = $this->mailer->createAttachment(
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$iTipMessage->message->serialize(),
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'event.ics',// TODO(leon): Make file name unique, e.g. add event id
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'text/calendar; method=' . $iTipMessage->method
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);
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$message->attach($attachment);
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try {
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$failed = $this->mailer->send($message);
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$iTipMessage->scheduleStatus = '1.1; Scheduling message is sent via iMip';
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if ($failed) {
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$this->logger->error('Unable to deliver message to {failed}', ['app' => 'dav', 'failed' => implode(', ', $failed)]);
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$iTipMessage->scheduleStatus = '5.0; EMail delivery failed';
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}
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} catch(\Exception $ex) {
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$this->logger->logException($ex, ['app' => 'dav']);
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$iTipMessage->scheduleStatus = '5.0; EMail delivery failed';
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}
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}
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/**
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* check if event took place in the past already
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* @param VCalendar $vObject
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* @return bool
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*/
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private function isEventInThePast(VCalendar $vObject) {
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/** @var VEvent $component */
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$component = $vObject->VEVENT;
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$firstOccurrence = $component->DTSTART->getDateTime()->getTimeStamp();
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// Finding the last occurrence is a bit harder
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if (!isset($component->RRULE)) {
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if (isset($component->DTEND)) {
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$lastOccurrence = $component->DTEND->getDateTime()->getTimeStamp();
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} elseif (isset($component->DURATION)) {
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/** @var \DateTime $endDate */
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$endDate = clone $component->DTSTART->getDateTime();
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// $component->DTEND->getDateTime() returns DateTimeImmutable
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$endDate = $endDate->add(DateTimeParser::parse($component->DURATION->getValue()));
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$lastOccurrence = $endDate->getTimestamp();
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} elseif (!$component->DTSTART->hasTime()) {
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/** @var \DateTime $endDate */
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$endDate = clone $component->DTSTART->getDateTime();
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// $component->DTSTART->getDateTime() returns DateTimeImmutable
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$endDate = $endDate->modify('+1 day');
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$lastOccurrence = $endDate->getTimestamp();
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} else {
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$lastOccurrence = $firstOccurrence;
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}
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} else {
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$it = new EventIterator($vObject, (string)$component->UID);
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$maxDate = new \DateTime(self::MAX_DATE);
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if ($it->isInfinite()) {
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$lastOccurrence = $maxDate->getTimestamp();
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} else {
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$end = $it->getDtEnd();
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while($it->valid() && $end < $maxDate) {
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$end = $it->getDtEnd();
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$it->next();
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}
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$lastOccurrence = $end->getTimestamp();
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}
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}
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$currentTime = $this->timeFactory->getTime();
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return $lastOccurrence < $currentTime;
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}
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/**
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* @param Message $iTipMessage
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* @return null|Property
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*/
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private function getCurrentAttendee(Message $iTipMessage) {
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/** @var VEvent $vevent */
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$vevent = $iTipMessage->message->VEVENT;
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$attendees = $vevent->select('ATTENDEE');
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foreach ($attendees as $attendee) {
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/** @var Property $attendee */
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if (strcasecmp($attendee->getValue(), $iTipMessage->recipient) === 0) {
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return $attendee;
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}
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}
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return null;
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}
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/**
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* @param string $default
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* @param Property|null $attendee
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* @return string
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*/
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private function getAttendeeLangOrDefault($default, Property $attendee = null) {
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if ($attendee !== null) {
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$lang = $attendee->offsetGet('LANGUAGE');
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if ($lang instanceof Parameter) {
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return $lang->getValue();
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}
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}
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return $default;
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}
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/**
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* @param IL10N $l10n
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* @param Property $dtstart
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* @param Property $dtend
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*/
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private function generateWhenString(IL10N $l10n, Property $dtstart, Property $dtend) {
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$isAllDay = $dtstart instanceof Property\ICalendar\Date;
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/** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtstart */
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/** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtend */
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/** @var \DateTimeImmutable $dtstartDt */
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$dtstartDt = $dtstart->getDateTime();
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/** @var \DateTimeImmutable $dtendDt */
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$dtendDt = $dtend->getDateTime();
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$diff = $dtstartDt->diff($dtendDt);
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$dtstartDt = new \DateTime($dtstartDt->format(\DateTime::ATOM));
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$dtendDt = new \DateTime($dtendDt->format(\DateTime::ATOM));
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if ($isAllDay) {
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// One day event
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if ($diff->days === 1) {
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return $l10n->l('date', $dtstartDt, ['width' => 'medium']);
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}
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//event that spans over multiple days
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$localeStart = $l10n->l('date', $dtstartDt, ['width' => 'medium']);
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$localeEnd = $l10n->l('date', $dtendDt, ['width' => 'medium']);
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return $localeStart . ' - ' . $localeEnd;
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}
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/** @var Property\ICalendar\DateTime $dtstart */
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/** @var Property\ICalendar\DateTime $dtend */
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$isFloating = $dtstart->isFloating();
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$startTimezone = $endTimezone = null;
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if (!$isFloating) {
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$prop = $dtstart->offsetGet('TZID');
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if ($prop instanceof Parameter) {
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$startTimezone = $prop->getValue();
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}
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$prop = $dtend->offsetGet('TZID');
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if ($prop instanceof Parameter) {
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$endTimezone = $prop->getValue();
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}
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}
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$localeStart = $l10n->l('datetime', $dtstartDt, ['width' => 'medium']);
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// always show full date with timezone if timezones are different
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if ($startTimezone !== $endTimezone) {
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$localeEnd = $l10n->l('datetime', $dtendDt, ['width' => 'medium']);
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return $localeStart . ' (' . $startTimezone . ') - ' .
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$localeEnd . ' (' . $endTimezone . ')';
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}
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// show only end time if date is the same
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if ($this->isDayEqual($dtstartDt, $dtendDt)) {
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$localeEnd = $l10n->l('time', $dtendDt, ['width' => 'medium']);
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} else {
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$localeEnd = $l10n->l('datetime', $dtendDt, ['width' => 'medium']);
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}
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return $localeStart . ' - ' . $localeEnd . ' (' . $startTimezone . ')';
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}
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/**
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* @param \DateTime $dtStart
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* @param \DateTime $dtEnd
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* @return bool
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*/
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private function isDayEqual(\DateTime $dtStart, \DateTime $dtEnd) {
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return $dtStart->format('Y-m-d') === $dtEnd->format('Y-m-d');
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}
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/**
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* @param IEMailTemplate $template
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* @param IL10N $l10n
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* @param string $method
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* @param string $summary
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* @param string $attendeeName
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* @param string $inviteeName
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*/
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private function addSubjectAndHeading(IEMailTemplate $template, IL10N $l10n,
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$method, $summary, $attendeeName, $inviteeName) {
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if ($method === self::METHOD_CANCEL) {
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$template->setSubject('Cancelled: ' . $summary);
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$template->addHeading($l10n->t('Invitation canceled'), $l10n->t('Hello %s,', [$attendeeName]));
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$template->addBodyText($l10n->t('The meeting »%s« with %s was canceled.', [$summary, $inviteeName]));
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} else if ($method === self::METHOD_REPLY) {
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$template->setSubject('Re: ' . $summary);
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$template->addHeading($l10n->t('Invitation updated'), $l10n->t('Hello %s,', [$attendeeName]));
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$template->addBodyText($l10n->t('The meeting »%s« with %s was updated.', [$summary, $inviteeName]));
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} else {
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$template->setSubject('Invitation: ' . $summary);
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$template->addHeading($l10n->t('%s invited you to »%s«', [$inviteeName, $summary]), $l10n->t('Hello %s,', [$attendeeName]));
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}
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}
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/**
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* @param IEMailTemplate $template
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* @param IL10N $l10n
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* @param string $time
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* @param string $location
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* @param string $description
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* @param string $url
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*/
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private function addBulletList(IEMailTemplate $template, IL10N $l10n, $time, $location, $description, $url) {
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$template->addBodyListItem($time, $l10n->t('When:'),
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$this->getAbsoluteImagePath('filetypes/text-calendar.svg'));
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if ($location) {
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$template->addBodyListItem($location, $l10n->t('Where:'),
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$this->getAbsoluteImagePath('filetypes/location.svg'));
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}
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if ($description) {
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$template->addBodyListItem((string)$description, $l10n->t('Description:'),
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$this->getAbsoluteImagePath('filetypes/text.svg'));
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}
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if ($url) {
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$template->addBodyListItem((string)$url, $l10n->t('Link:'),
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$this->getAbsoluteImagePath('filetypes/link.svg'));
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}
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}
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/**
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* @param string $path
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* @return string
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*/
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private function getAbsoluteImagePath($path) {
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return $this->urlGenerator->getAbsoluteURL(
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$this->urlGenerator->imagePath('core', $path)
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);
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}
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}
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