Elep

<?php
/**
 * Created by PhpStorm.
 * User: turgutsaricam
 * Date: 12/04/2020
 * Time: 09:06
 *
 * @since 1.11.0
 */

namespace WPCCrawler\Objects\Filtering\Property\Element;

use WPCCrawler\Objects\Enums\ValueType;
use WPCCrawler\Objects\Filtering\Commands\Base\AbstractBaseCommand;
use WPCCrawler\Objects\Filtering\Enums\PropertyKey;
use WPCCrawler\Objects\Filtering\Property\Objects\CalculationResult;

class ElementNumericTextProperty extends ElementTextProperty {

public function getKey(): string {
        return PropertyKey::ELEMENT_NUMERIC_TEXT;
    }

public function getName(): string {
        return _wpcc('Numeric text');
    }

public function getOutputDataTypes(): array {
        return [ValueType::T_NUMERIC];
    }

protected function onCalculate($key, $source, AbstractBaseCommand $cmd): ?CalculationResult {
        $result = parent::onCalculate($key, $source, $cmd);
        if (!($result instanceof CalculationResult)) {
            return null;
        }

$text = $result->getValue();
        return new CalculationResult($key, is_numeric($text)
            ? (float) $text
            : null
        );
    }

}