nextcloud/apps/dav/lib/caldav/birthdayservice.php

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<?php
/**
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @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;
use Exception;
use OCA\DAV\CardDAV\CardDavBackend;
use Sabre\VObject\Component\VCalendar;
use Sabre\VObject\Reader;
class BirthdayService {
const BIRTHDAY_CALENDAR_URI = 'contact_birthdays';
/**
* BirthdayService constructor.
*
* @param CalDavBackend $calDavBackEnd
* @param CardDavBackend $cardDavBackEnd
*/
public function __construct($calDavBackEnd, $cardDavBackEnd) {
$this->calDavBackEnd = $calDavBackEnd;
$this->cardDavBackEnd = $cardDavBackEnd;
}
/**
* @param int $addressBookId
* @param string $cardUri
* @param string $cardData
*/
public function onCardChanged($addressBookId, $cardUri, $cardData) {
$book = $this->cardDavBackEnd->getAddressBookById($addressBookId);
$principalUri = $book['principaluri'];
$calendarUri = self::BIRTHDAY_CALENDAR_URI;
$calendar = $this->ensureCalendarExists($principalUri, $calendarUri, []);
$objectUri = $book['uri'] . '-' . $cardUri. '.ics';
$calendarData = $this->buildBirthdayFromContact($cardData);
$existing = $this->calDavBackEnd->getCalendarObject($calendar['id'], $objectUri);
if (is_null($calendarData)) {
if (!is_null($existing)) {
$this->calDavBackEnd->deleteCalendarObject($calendar['id'], $objectUri);
}
} else {
if (is_null($existing)) {
$this->calDavBackEnd->createCalendarObject($calendar['id'], $objectUri, $calendarData->serialize());
} else {
if ($this->birthdayEvenChanged($existing['calendardata'], $calendarData)) {
$this->calDavBackEnd->updateCalendarObject($calendar['id'], $objectUri, $calendarData->serialize());
}
}
}
}
/**
* @param int $addressBookId
* @param string $cardUri
*/
public function onCardDeleted($addressBookId, $cardUri) {
$book = $this->cardDavBackEnd->getAddressBookById($addressBookId);
$principalUri = $book['principaluri'];
$calendarUri = self::BIRTHDAY_CALENDAR_URI;
$calendar = $this->ensureCalendarExists($principalUri, $calendarUri, []);
$objectUri = $book['uri'] . '-' . $cardUri. '.ics';
$this->calDavBackEnd->deleteCalendarObject($calendar['id'], $objectUri);
}
/**
* @param string $principal
* @param string $id
* @param array $properties
* @return array|null
* @throws \Sabre\DAV\Exception\BadRequest
*/
public function ensureCalendarExists($principal, $id, $properties) {
$book = $this->calDavBackEnd->getCalendarByUri($principal, $id);
if (!is_null($book)) {
return $book;
}
$this->calDavBackEnd->createCalendar($principal, $id, $properties);
return $this->calDavBackEnd->getCalendarByUri($principal, $id);
}
/**
* @param string $cardData
* @return null|VCalendar
*/
public function buildBirthdayFromContact($cardData) {
if (empty($cardData)) {
return null;
}
try {
$doc = Reader::read($cardData);
} catch (Exception $e) {
return null;
}
if (!isset($doc->BDAY)) {
return null;
}
$birthday = $doc->BDAY;
if (!(string)$birthday) {
return null;
}
$title = str_replace('{name}',
strtr((string)$doc->FN, array('\,' => ',', '\;' => ';')),
'{name}\'s Birthday'
);
try {
$date = new \DateTime($birthday);
} catch (Exception $e) {
return null;
}
$vCal = new VCalendar();
$vCal->VERSION = '2.0';
$vEvent = $vCal->createComponent('VEVENT');
$vEvent->add('DTSTART');
$vEvent->DTSTART->setDateTime(
$date
);
$vEvent->DTSTART['VALUE'] = 'DATE';
$vEvent->add('DTEND');
$date->add(new \DateInterval('P1D'));
$vEvent->DTEND->setDateTime(
$date
);
$vEvent->DTEND['VALUE'] = 'DATE';
$vEvent->{'UID'} = $doc->UID;
$vEvent->{'RRULE'} = 'FREQ=YEARLY';
$vEvent->{'SUMMARY'} = $title . ' (' . $date->format('Y') . ')';
$vEvent->{'TRANSP'} = 'TRANSPARENT';
$vCal->add($vEvent);
return $vCal;
}
/**
* @param string $user
*/
public function syncUser($user) {
$books = $this->cardDavBackEnd->getAddressBooksForUser('principals/users/'.$user);
foreach($books as $book) {
$cards = $this->cardDavBackEnd->getCards($book['id']);
foreach($cards as $card) {
$this->onCardChanged($book['id'], $card['uri'], $card['carddata']);
}
}
}
/**
* @param string $existingCalendarData
* @param VCalendar $newCalendarData
* @return bool
*/
public function birthdayEvenChanged($existingCalendarData, $newCalendarData) {
try {
$existingBirthday = Reader::read($existingCalendarData);
} catch (Exception $ex) {
return true;
}
if ($newCalendarData->VEVENT->DTSTART->getValue() !== $existingBirthday->VEVENT->DTSTART->getValue() ||
$newCalendarData->VEVENT->SUMMARY->getValue() !== $existingBirthday->VEVENT->SUMMARY->getValue()
) {
return true;
}
return false;
}
}