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Editing: DiagnoseAccount.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-only
 */

namespace OCA\Mail\Command;

use Horde_Imap_Client;
use Horde_Imap_Client_Exception;
use Horde_Imap_Client_Mailbox;
use Horde_Imap_Client_Socket;
use OCA\Mail\IMAP\IMAPClientFactory;
use OCA\Mail\Service\AccountService;
use OCP\AppFramework\Db\DoesNotExistException;
use Psr\Log\LoggerInterface;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use function array_reduce;
use function json_decode;
use function sort;

final class DiagnoseAccount extends Command {
	private const ARGUMENT_ACCOUNT_ID = 'account-id';

private AccountService $accountService;
	private IMAPClientFactory $clientFactory;
	private LoggerInterface $logger;

public function __construct(AccountService $service,
		IMAPClientFactory $clientFactory,
		LoggerInterface $logger) {
		parent::__construct();

$this->accountService = $service;
		$this->clientFactory = $clientFactory;
		$this->logger = $logger;
	}

/**
	 * @return void
	 */
	protected function configure() {
		$this->setName('mail:account:diagnose');
		$this->setDescription('Diagnose a user\'s IMAP connection');
		$this->addArgument(self::ARGUMENT_ACCOUNT_ID, InputArgument::REQUIRED);
	}

protected function execute(InputInterface $input, OutputInterface $output): int {
		$accountId = (int)$input->getArgument(self::ARGUMENT_ACCOUNT_ID);

try {
			$account = $this->accountService->findById($accountId);
		} catch (DoesNotExistException $e) {
			$output->writeln("<error>Account $accountId does not exist</error>");
			return 1;
		}

if ($account->getMailAccount()->getInboundPassword() === null) {
			$output->writeln('<error>No IMAP passwort set. The user might have to log into their account to set it.</error>');
		}
		$imapClient = $this->clientFactory->getClient($account);
		try {
			$this->printCapabilitiesStats($output, $imapClient);
			$this->printMailboxesMessagesStats($output, $imapClient);
		} catch (Horde_Imap_Client_Exception $e) {
			$this->logger->error('Could not get account statistics: ' . $e, [
				'exception' => $e,
			]);
			$output->writeln('<error>Horde error occurred: ' . $e->getMessage() . '. See nextcloud.log for more details.</error>');
			return 2;
		} finally {
			$imapClient->logout();
		}

return 0;
	}

/**
	 * @param OutputInterface $output
	 * @param Horde_Imap_Client_Socket $imapClient
	 *
	 * @throws Horde_Imap_Client_Exception
	 */
	private function printCapabilitiesStats(OutputInterface $output,
		Horde_Imap_Client_Socket $imapClient): void {
		$output->writeln('IMAP capabilities:');
		// Once logged in more capabilities are advertised
		$imapClient->login();
		$capabilities = array_keys(
			json_decode(
				$imapClient->capability->serialize(),
				true
			)
		);
		sort($capabilities);
		foreach ($capabilities as $capability) {
			$output->writeln("- $capability");
		}
		$output->writeln('');
	}

/**
	 * @param OutputInterface $output
	 * @param Horde_Imap_Client_Socket $imapClient
	 *
	 * @throws Horde_Imap_Client_Exception
	 */
	protected function printMailboxesMessagesStats(OutputInterface $output,
		Horde_Imap_Client_Socket $imapClient): void {
		$mailboxes = $imapClient->listMailboxes('*', Horde_Imap_Client::MBOX_ALL, [
			'flat' => true,
		]);
		$messages = array_reduce($mailboxes, static function (int $c, Horde_Imap_Client_Mailbox $mb) use ($imapClient) {
			$status = $imapClient->status($mb, Horde_Imap_Client::STATUS_MESSAGES);
			return $c + $status['messages'];
		}, 0);
		$nMailboxes = count($mailboxes);
		$output->writeln("Account has $messages messages in $nMailboxes mailboxes");
	}
}

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