From a2d4f8d3f13a1f94db24d05c477815d2fe0b16f6 Mon Sep 17 00:00:00 2001
From: SebastianKrupinski <krupinskis05@gmail.com>
Date: Thu, 3 Apr 2025 19:54:08 -0400
Subject: feat: Calendar Export

Signed-off-by: SebastianKrupinski <krupinskis05@gmail.com>
---
 apps/dav/lib/Command/ExportCalendar.php | 95 +++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 apps/dav/lib/Command/ExportCalendar.php

(limited to 'apps/dav/lib/Command')

diff --git a/apps/dav/lib/Command/ExportCalendar.php b/apps/dav/lib/Command/ExportCalendar.php
new file mode 100644
index 00000000000..5758cd4fa87
--- /dev/null
+++ b/apps/dav/lib/Command/ExportCalendar.php
@@ -0,0 +1,95 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\DAV\Command;
+
+use InvalidArgumentException;
+use OCA\DAV\CalDAV\Export\ExportService;
+use OCP\Calendar\CalendarExportOptions;
+use OCP\Calendar\ICalendarExport;
+use OCP\Calendar\IManager;
+use OCP\IUserManager;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Calendar Export Command
+ *
+ * Used to export data from supported calendars to disk or stdout
+ */
+#[AsCommand(
+	name: 'calendar:export',
+	description: 'Export calendar data from supported calendars to disk or stdout',
+	hidden: false
+)]
+class ExportCalendar extends Command {
+	public function __construct(
+		private IUserManager $userManager,
+		private IManager $calendarManager,
+		private ExportService $exportService,
+	) {
+		parent::__construct();
+	}
+
+	protected function configure(): void {
+		$this->setName('calendar:export')
+			->setDescription('Export calendar data from supported calendars to disk or stdout')
+			->addArgument('uid', InputArgument::REQUIRED, 'Id of system user')
+			->addArgument('uri', InputArgument::REQUIRED, 'Uri of calendar')
+			->addOption('format', null, InputOption::VALUE_REQUIRED, 'Format of output (ical, jcal, xcal) defaults to ical', 'ical')
+			->addOption('location', null, InputOption::VALUE_REQUIRED, 'Location of where to write the output. defaults to stdout');
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output): int {
+		$userId = $input->getArgument('uid');
+		$calendarId = $input->getArgument('uri');
+		$format = $input->getOption('format');
+		$location = $input->getOption('location');
+
+		if (!$this->userManager->userExists($userId)) {
+			throw new InvalidArgumentException("User <$userId> not found.");
+		}
+		// retrieve calendar and evaluate if export is supported
+		$calendars = $this->calendarManager->getCalendarsForPrincipal('principals/users/' . $userId, [$calendarId]);
+		if ($calendars === []) {
+			throw new InvalidArgumentException("Calendar <$calendarId> not found.");
+		}
+		$calendar = $calendars[0];
+		if (!$calendar instanceof ICalendarExport) {
+			throw new InvalidArgumentException("Calendar <$calendarId> does not support exporting");
+		}
+		// construct options object
+		$options = new CalendarExportOptions();
+		// evaluate if provided format is supported
+		if (!in_array($format, ExportService::FORMATS, true)) {
+			throw new InvalidArgumentException("Format <$format> is not valid.");
+		}
+		$options->setFormat($format);
+		// evaluate is a valid location was given and is usable otherwise output to stdout
+		if ($location !== null) {
+			$handle = fopen($location, 'wb');
+			if ($handle === false) {
+				throw new InvalidArgumentException("Location <$location> is not valid. Can not open location for write operation.");
+			}
+			
+			foreach ($this->exportService->export($calendar, $options) as $chunk) {
+				fwrite($handle, $chunk);
+			}
+			fclose($handle);
+		} else {
+			foreach ($this->exportService->export($calendar, $options) as $chunk) {
+				$output->writeln($chunk);
+			}
+		}
+
+		return self::SUCCESS;
+	}
+}
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