A schedule per location, and locations backed up one after the other

Off, once a day or every N hours from a time, each in its own time zone. Existing locations
keep the time that held for all of them. A backup that has to wait shows as queued, and its
restore point has the time it really began.

lib/Command/TargetSchedule.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+// SPDX-FileCopyrightText: 2026 Dillard Blom
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+namespace OCA\NgBackup\Command;
+
+use OCA\NgBackup\Service\Schedule;
+use OCA\NgBackup\Service\TargetService;
+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;
+
+final class TargetSchedule extends Command {
+	public function __construct(
+		private TargetService $targets,
+		private Schedule $schedule,
+	) {
+		parent::__construct();
+	}
+
+	protected function configure(): void {
+		$this->setName('backup:target:schedule')
+			->setDescription('Show or set when a location is backed up')
+			->addArgument('target', InputArgument::REQUIRED, 'Location name or id')
+			->addArgument('schedule', InputArgument::OPTIONAL, '"off", HH:MM for once a day, or HH:MM/N for every N hours from HH:MM; omit to show the current one')
+			->addOption('timezone', null, InputOption::VALUE_REQUIRED, 'Time zone of the time, e.g. Europe/Amsterdam');
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output): int {
+		$t = $this->targets->get($input->getArgument('target'));
+		$schedule = $input->getArgument('schedule');
+		$zone = $input->getOption('timezone') ?? $this->schedule->zoneOr($t->getScheduleZone());
+		if ($schedule !== null) {
+			try {
+				$t = $this->targets->setSchedule($t, $schedule, (string)$zone);
+			} catch (\InvalidArgumentException $e) {
+				$output->writeln('<error>' . $e->getMessage() . '</error>');
+				return 1;
+			}
+		}
+		$current = (string)$t->getSchedule();
+		$output->writeln($t->getName() . ': ' . ($current === '' ? 'off' : $current . ' (' . $zone . ')'));
+		return 0;
+	}
+}