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Editing: Thread.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-only
 */

namespace OCA\Mail\Command;

use OCA\Mail\IMAP\Threading\DatabaseMessage;
use OCA\Mail\IMAP\Threading\ThreadBuilder;
use OCA\Mail\Support\ConsoleLoggerDecorator;
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_map;
use function file_exists;
use function file_get_contents;
use function json_decode;
use function memory_get_peak_usage;

final class Thread extends Command {
	public const ARGUMENT_INPUT_FILE = 'thread-file';

private ThreadBuilder $builder;
	private LoggerInterface $logger;

public function __construct(ThreadBuilder $builder,
		LoggerInterface $logger) {
		parent::__construct();
		$this->builder = $builder;
		$this->logger = $logger;
	}

/**
	 * @return void
	 */
	protected function configure() {
		$this->setName('mail:thread');
		$this->setDescription('Build threads from the exported data of an account');
		$this->addArgument(self::ARGUMENT_INPUT_FILE, InputArgument::REQUIRED);
	}

protected function execute(InputInterface $input, OutputInterface $output): int {
		$consoleLogger = new ConsoleLoggerDecorator(
			$this->logger,
			$output
		);

$inputFile = $input->getArgument(self::ARGUMENT_INPUT_FILE);

if (!file_exists($inputFile)) {
			$output->writeln("<error>File $inputFile does not exist</error>");
			return 1;
		}

$json = file_get_contents($inputFile);
		if ($json === false) {
			$output->writeln('<error>Could not read thread data</error>');
			return 2;
		}
		$nRead = strlen($json);
		$consoleLogger->debug("{$nRead}B read");
		$parsed = json_decode($json, true, 512, JSON_THROW_ON_ERROR);
		$nParsed = count($parsed);
		$consoleLogger->debug("$nParsed data sets loaded");
		$threadData = array_map(static fn ($serialized) => new DatabaseMessage(
			$serialized['databaseId'],
			$serialized['subject'],
			$serialized['id'],
			$serialized['references'],
			$serialized['threadRootId'] ?? null
		), $parsed);

$threads = $this->builder->build($threadData, $consoleLogger);
		$nThreads = count($threads);
		$nThreadData = count($threadData);
		$output->writeln("$nThreads threads built from $nThreadData messages");

$mbs = (int)(memory_get_peak_usage() / 1024 / 1024);
		$output->writeln("<info>{$mbs}MB of memory used</info>");

return 0;
	}
}

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