Add occ command to create a new calendar

apps/dav/appinfo/register_command.php

@@ -1,8 +1,10 @@
 <?php
 
 use OCA\DAV\Command\CreateAddressBook;
+use OCA\DAV\Command\CreateCalendar;
 
 $dbConnection = \OC::$server->getDatabaseConnection();
 $userManager = OC::$server->getUserManager();
 /** @var Symfony\Component\Console\Application $application */
 $application->add(new CreateAddressBook($userManager, $dbConnection));
+$application->add(new CreateCalendar($userManager, $dbConnection));

apps/dav/command/createcalendar.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace OCA\DAV\Command;
+
+use OCA\DAV\CalDAV\CalDavBackend;
+use OCP\IDBConnection;
+use OCP\IUserManager;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class CreateCalendar extends Command {
+
+	/** @var IUserManager */
+	protected $userManager;
+
+	/** @var \OCP\IDBConnection */
+	protected $dbConnection;
+
+	/**
+	 * @param IUserManager $userManager
+	 * @param IDBConnection $dbConnection
+	 */
+	function __construct(IUserManager $userManager, IDBConnection $dbConnection) {
+		parent::__construct();
+		$this->userManager = $userManager;
+		$this->dbConnection = $dbConnection;
+	}
+
+	protected function configure() {
+		$this
+			->setName('dav:create-calendar')
+			->setDescription('Create a dav calendar')
+			->addArgument('user',
+				InputArgument::REQUIRED,
+				'User for whom the calendar will be created')
+			->addArgument('name',
+				InputArgument::REQUIRED,
+				'Name of the calendar');
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output) {
+		$user = $input->getArgument('user');
+		if (!$this->userManager->userExists($user)) {
+			throw new \InvalidArgumentException("User <$user> in unknown.");
+		}
+		$name = $input->getArgument('name');
+		$caldav = new CalDavBackend($this->dbConnection);
+		$caldav->createCalendar("principals/$user", $name, []);
+	}
+}