<?php
/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

namespace MediaWiki\EditPage\Constraint;

use MediaWiki\Title\Title;
use MediaWiki\User\UserIdentity;
use Psr\Log\LoggerInterface;
use StatusValue;

/**
 * Verify simple anti spam measure of an extra hidden text field
 *
 * @since 1.36
 * @internal
 */
class SimpleAntiSpamConstraint implements IEditConstraint {

	/** @var LoggerInterface */
	private $logger;

	/** @var string */
	private $input;

	/** @var UserIdentity */
	private $user;

	/** @var Title */
	private $title;

	/**
	 * @param LoggerInterface $logger for logging hits
	 * @param string $inputText
	 * @param UserIdentity $user for logging hits
	 * @param Title $title for logging hits
	 */
	public function __construct(
		LoggerInterface $logger,
		string $inputText,
		UserIdentity $user,
		Title $title
	) {
		$this->logger = $logger;
		$this->input = $inputText;
		$this->user = $user;
		$this->title = $title;
	}

	public function checkConstraint(): string {
		if ( $this->input === '' ) {
			return self::CONSTRAINT_PASSED;
		}
		$this->logger->debug(
			'{name} editing "{title}" submitted bogus field "{input}"',
			[
				'name' => $this->user->getName(),
				'title' => $this->title->getPrefixedText(),
				'input' => $this->input
			]
		);
		return self::CONSTRAINT_FAILED;
	}

	public function getLegacyStatus(): StatusValue {
		$statusValue = StatusValue::newGood();
		if ( $this->input !== '' ) {
			$statusValue->fatal( 'spamprotectionmatch', false );
			$statusValue->value = self::AS_SPAM_ERROR;
		}
		return $statusValue;
	}

}
