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