CLI commands to manage sites

Implement `sites:delete`

Reference: gh-47

src/CliCommand/SitesDelete.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * @package   panopticon
+ * @copyright Copyright (c)2023-2023 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   https://www.gnu.org/licenses/agpl-3.0.txt GNU Affero General Public License, version 3 or later
+ */
+
+namespace Akeeba\Panopticon\CliCommand;
+
+defined('AKEEBA') || die;
+
+use Akeeba\Panopticon\CliCommand\Attribute\ConfigAssertion;
+use Akeeba\Panopticon\Factory;
+use Akeeba\Panopticon\Model\Sites;
+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\Output\OutputInterface;
+
+#[AsCommand(
+	name: 'sites:delete',
+	description: 'Delete a site',
+	hidden: false,
+)]
+#[ConfigAssertion(true)]
+class SitesDelete extends AbstractCommand
+{
+	protected function execute(InputInterface $input, OutputInterface $output): int
+	{
+		$container = Factory::getContainer();
+		/** @var Sites $model */
+		$model = $container->mvcFactory->makeTempModel('Sites');
+
+		$id = intval($input->getArgument('id'));
+
+		$model
+			->findOrFail($id)
+			->delete();
+
+		return Command::SUCCESS;
+	}
+
+	protected function configure(): void
+	{
+		$this
+			->addArgument('id', InputArgument::REQUIRED, 'The numeric site ID to delete');
+	}
+
+}

src/Model/Site.php

@@ -816,6 +816,20 @@ protected function isSiteSpecificTaskScheduled(string $type): bool
 		);
 	}
 
+	protected function onBeforeDelete($id)
+	{
+		if (empty($id))
+		{
+			return;
+		}
+
+		// Remove all tasks attached to this site
+		/** @var Tasks $taskModel */
+		$taskModel = $this->getContainer()->mvcFactory->makeTempModel('Tasks');
+		$taskModel->setState('site_id', $id);
+		$taskModel->get(true)->delete();
+	}
+
 	private function applyUserGroupsToQuery(Query $query): void
 	{
 		if (defined('AKEEBA_CLI'))