DurationManager.php
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DurationManager.php
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	<?php

	namespace MediaWiki\CheckUser\Investigate\Utilities;

	use DateInterval;
	use DateTime;
	use Exception;
	use MediaWiki\Request\WebRequest;
	use MediaWiki\Utils\MWTimestamp;

	class DurationManager {

	/**
	* Retrieves a valid duration from the request.
	*
	* @param WebRequest $request
	* @return string
	*/
	public function getFromRequest( WebRequest $request ): string {
	$value = $request->getVal( 'duration', '' );

	if ( !$this->isValid( $value ) ) {
	return '';
	}

	return $value;
	}

	/**
	* Return the timestamp from the duration.
	*
	* @param WebRequest $request
	* @return string
	*/
	public function getTimestampFromRequest( WebRequest $request ): string {
	$duration = $this->getFromRequest( $request );
	if ( $duration === '' ) {
	return $duration;
	}

	try {
	$interval = new DateInterval( $duration );
	$now = DateTime::createFromFormat( 'U', (string)MWTimestamp::time() );
	return MWTimestamp::convert( TS_MW, $now->sub( $interval ) );
	} catch ( Exception $e ) {
	return '';
	}
	}

	/**
	* Determine if duration is valid.
	*
	* @param string $value
	* @return bool
	*/
	public function isValid( string $value ): bool {
	// No value implies "all"
	if ( $value === '' ) {
	return true;
	}

	try {
	// @phan-suppress-next-line PhanNoopNew
	new DateInterval( $value );
	return true;
	} catch ( Exception $e ) {
	return false;
	}
	}
	}