Parse calendar object for attendees and emit interaction events

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

2 files changed, 267 insertions, 5 deletions

diff --git a/apps/dav/lib/Listener/CalendarContactInteractionListener.php b/apps/dav/lib/Listener/CalendarContactInteractionListener.php
index 62bddd500e4..1a04d44f6c6 100644
--- a/apps/dav/lib/Listener/CalendarContactInteractionListener.php
+++ b/apps/dav/lib/Listener/CalendarContactInteractionListener.php
@@ -35,7 +35,13 @@ use OCP\EventDispatcher\IEventDispatcher;
 use OCP\EventDispatcher\IEventListener;
 use OCP\IUser;
 use OCP\IUserSession;
+use OCP\Mail\IMailer;
 use Psr\Log\LoggerInterface;
+use Sabre\VObject\Component\VEvent;
+use Sabre\VObject\Parameter;
+use Sabre\VObject\Property;
+use Sabre\VObject\Reader;
+use Throwable;
 use function strlen;
 use function strpos;
 use function substr;
@@ -47,39 +53,59 @@ class CalendarContactInteractionListener implements IEventListener {
 	private $dispatcher;
 
 	/** @var IUserSession */
-	private $userManager;
+	private $userSession;
 
 	/** @var Principal */
 	private $principalConnector;
 
+	/** @var IMailer */
+	private $mailer;
+
 	/** @var LoggerInterface */
 	private $logger;
 
 	public function __construct(IEventDispatcher $dispatcher,
-								IUserSession $userManager,
+								IUserSession $userSession,
 								Principal $principalConnector,
+								IMailer $mailer,
 								LoggerInterface $logger) {
 		$this->dispatcher = $dispatcher;
-		$this->userManager = $userManager;
+		$this->userSession = $userSession;
 		$this->principalConnector = $principalConnector;
+		$this->mailer = $mailer;
 		$this->logger = $logger;
 	}
 
 	public function handle(Event $event): void {
-		if (($user = $this->userManager->getUser()) === null) {
+		if (($user = $this->userSession->getUser()) === null) {
 			// Without user context we can't do anything
 			return;
 		}
 
 		if ($event instanceof CalendarObjectCreatedEvent || $event instanceof CalendarObjectUpdatedEvent) {
 			// users: href => principal:principals/users/admin
-			// TODO: parse (email) attendees from the VCARD
 			foreach ($event->getShares() as $share) {
 				if (!isset($share['href'])) {
 					continue;
 				}
 				$this->emitFromUri($share['href'], $user);
 			}
+
+			// emit interaction for email attendees as well
+			if (isset($event->getObjectData()['calendardata'])) {
+				try {
+					$calendar = Reader::read($event->getObjectData()['calendardata']);
+					if ($calendar->VEVENT) {
+						foreach ($calendar->VEVENT as $calendarEvent) {
+							$this->emitFromObject($calendarEvent, $user);
+						}
+					}
+				} catch (Throwable $e) {
+					$this->logger->warning('Could not read calendar data for interaction events: ' . $e->getMessage(), [
+						'exception' => $e,
+					]);
+				}
+			}
 		}
 
 		if ($event instanceof CalendarShareUpdatedEvent && !empty($event->getAdded())) {
@@ -114,4 +140,38 @@ class CalendarContactInteractionListener implements IEventListener {
 			(new ContactInteractedWithEvent($user))->setUid($uid)
 		);
 	}
+
+	private function emitFromObject(VEvent $vevent, IUser $user): void {
+		if (!$vevent->ATTENDEE) {
+			// Nothing left to do
+			return;
+		}
+
+		foreach ($vevent->ATTENDEE as $attendee) {
+			if (!($attendee instanceof Property)) {
+				continue;
+			}
+
+			$cuType = $attendee->offsetGet('CUTYPE');
+			if ($cuType instanceof Parameter && $cuType->getValue() !== 'INDIVIDUAL') {
+				// Don't care about those
+				continue;
+			}
+
+			$mailTo = $attendee->getValue();
+			if (strpos($mailTo, 'mailto:') !== 0) {
+				// Doesn't look like an email
+				continue;
+			}
+			$email = substr($mailTo, strlen('mailto:'));
+			if (!$this->mailer->validateMailAddress($email)) {
+				// This really isn't a valid email
+				continue;
+			}
+
+			$this->dispatcher->dispatchTyped(
+				(new ContactInteractedWithEvent($user))->setEmail($email)
+			);
+		}
+	}
 }
diff --git a/apps/dav/tests/unit/Listener/CalendarContactInteractionListenerTest.php b/apps/dav/tests/unit/Listener/CalendarContactInteractionListenerTest.php
new file mode 100644
index 00000000000..5a90f5440a0
--- /dev/null
+++ b/apps/dav/tests/unit/Listener/CalendarContactInteractionListenerTest.php
@@ -0,0 +1,202 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * @copyright 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCA\DAV\Tests\Unit\Listener;
+
+use OCA\DAV\Connector\Sabre\Principal;
+use OCA\DAV\Events\CalendarObjectCreatedEvent;
+use OCA\DAV\Events\CalendarShareUpdatedEvent;
+use OCA\DAV\Listener\CalendarContactInteractionListener;
+use OCP\Contacts\Events\ContactInteractedWithEvent;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\IUser;
+use OCP\IUserSession;
+use OCP\Mail\IMailer;
+use PHPUnit\Framework\MockObject\MockObject;
+use Psr\Log\LoggerInterface;
+use Test\TestCase;
+
+class CalendarContactInteractionListenerTest extends TestCase {
+
+	/** @var IEventDispatcher|MockObject */
+	private $eventDispatcher;
+
+	/** @var IUserSession|MockObject */
+	private $userSession;
+
+	/** @var Principal|MockObject */
+	private $principalConnector;
+
+	/** @var LoggerInterface|MockObject */
+	private $logger;
+
+	/** @var IMailer|MockObject */
+	private $mailer;
+
+	/** @var CalendarContactInteractionListener */
+	private $listener;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->eventDispatcher = $this->createMock(IEventDispatcher::class);
+		$this->userSession = $this->createMock(IUserSession::class);
+		$this->principalConnector = $this->createMock(Principal::class);
+		$this->mailer = $this->createMock(IMailer::class);
+		$this->logger = $this->createMock(LoggerInterface::class);
+
+		$this->listener = new CalendarContactInteractionListener(
+			$this->eventDispatcher,
+			$this->userSession,
+			$this->principalConnector,
+			$this->mailer,
+			$this->logger
+		);
+	}
+
+	public function testParseUnrelated(): void {
+		$event = new Event();
+		$this->eventDispatcher->expects(self::never())->method('dispatchTyped');
+
+		$this->listener->handle($event);
+	}
+
+	public function testHandleWithoutAnythingInteresting(): void {
+		$event = new CalendarShareUpdatedEvent(123, [], [], [], []);
+		$user = $this->createMock(IUser::class);
+		$this->userSession->expects(self::once())->method('getUser')->willReturn($user);
+		$this->eventDispatcher->expects(self::never())->method('dispatchTyped');
+
+		$this->listener->handle($event);
+	}
+
+	public function testParseInvalidData(): void {
+		$event = new CalendarObjectCreatedEvent(123, [], [], ['calendardata' => 'BEGIN:FOO']);
+		$user = $this->createMock(IUser::class);
+		$this->userSession->expects(self::once())->method('getUser')->willReturn($user);
+		$this->eventDispatcher->expects(self::never())->method('dispatchTyped');
+		$this->logger->expects(self::once())->method('warning');
+
+		$this->listener->handle($event);
+	}
+
+	public function testParseCalendarEventWithInvalidEmail(): void {
+		$event = new CalendarObjectCreatedEvent(123, [], [], ['calendardata' => <<<EVENT
+BEGIN:VCALENDAR
+VERSION:2.0
+CALSCALE:GREGORIAN
+PRODID:-//IDN nextcloud.com//Calendar app 2.1.3//EN
+BEGIN:VTIMEZONE
+TZID:Europe/Vienna
+BEGIN:DAYLIGHT
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+TZNAME:CEST
+DTSTART:19700329T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
+END:DAYLIGHT
+BEGIN:STANDARD
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+TZNAME:CET
+DTSTART:19701025T030000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+CREATED:20210202T091151Z
+DTSTAMP:20210203T130231Z
+LAST-MODIFIED:20210203T130231Z
+SEQUENCE:9
+UID:b74a0c8e-93b0-447f-aed5-b679b19e874a
+DTSTART;TZID=Europe/Vienna:20210202T103000
+DTEND;TZID=Europe/Vienna:20210202T133000
+SUMMARY:tes
+ORGANIZER;CN=admin:mailto:christoph.wurst@nextcloud.com
+ATTENDEE;CN=somethingbutnotanemail;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-ACTION;
+ ROLE=REQ-PARTICIPANT;RSVP=FALSE:mailto:somethingbutnotanemail
+DESCRIPTION:test
+END:VEVENT
+END:VCALENDAR
+EVENT]);
+		$user = $this->createMock(IUser::class);
+		$this->userSession->expects(self::once())->method('getUser')->willReturn($user);
+		$this->eventDispatcher->expects(self::never())->method('dispatchTyped');
+		$this->logger->expects(self::never())->method('warning');
+
+		$this->listener->handle($event);
+	}
+
+	public function testParseCalendarEvent(): void {
+		$event = new CalendarObjectCreatedEvent(123, [], [], ['calendardata' => <<<EVENT
+BEGIN:VCALENDAR
+VERSION:2.0
+CALSCALE:GREGORIAN
+PRODID:-//IDN nextcloud.com//Calendar app 2.1.3//EN
+BEGIN:VTIMEZONE
+TZID:Europe/Vienna
+BEGIN:DAYLIGHT
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+TZNAME:CEST
+DTSTART:19700329T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
+END:DAYLIGHT
+BEGIN:STANDARD
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+TZNAME:CET
+DTSTART:19701025T030000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+CREATED:20210202T091151Z
+DTSTAMP:20210203T130231Z
+LAST-MODIFIED:20210203T130231Z
+SEQUENCE:9
+UID:b74a0c8e-93b0-447f-aed5-b679b19e874a
+DTSTART;TZID=Europe/Vienna:20210202T103000
+DTEND;TZID=Europe/Vienna:20210202T133000
+SUMMARY:tes
+ORGANIZER;CN=admin:mailto:christoph.wurst@nextcloud.com
+ATTENDEE;CN=user@domain.tld;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-ACTION;
+ ROLE=REQ-PARTICIPANT;RSVP=FALSE:mailto:user@domain.tld
+DESCRIPTION:test
+END:VEVENT
+END:VCALENDAR
+EVENT]);
+		$user = $this->createMock(IUser::class);
+		$this->userSession->expects(self::once())->method('getUser')->willReturn($user);
+		$this->mailer->expects(self::once())->method('validateMailAddress')->willReturn(true);
+		$this->eventDispatcher->expects(self::once())
+			->method('dispatchTyped')
+			->with(self::equalTo((new ContactInteractedWithEvent($user))->setEmail('user@domain.tld')));
+		$this->logger->expects(self::never())->method('warning');
+
+		$this->listener->handle($event);
+	}
+}