HasExistingDrafts.php

<?php

namespace modules\foo\elements\conditions;

use Craft;
use craft\base\conditions\BaseLightswitchConditionRule;
use craft\base\Element;
use craft\base\ElementInterface;
use craft\elements\db\ElementQueryInterface;

/**
 * Element has existing drafts.
 *
 * @author Pixel & Tonic, Inc. <support@pixelandtonic.com>
 * @since 5.3.0
 */
class HasExistingDrafts extends BaseLightswitchConditionRule implements ElementConditionRuleInterface
{
    /**
     * @inheritdoc
     */
    public function getLabel(): string
    {
        return Craft::t('app', 'Has Existing Drafts');
    }

    /**
     * @inheritdoc
     */
    public function getExclusiveQueryParams(): array
    {
        return ['hasExistingDrafts'];
    }

    /**
     * @inheritdoc
     */
    public function modifyQuery(ElementQueryInterface $query): void
    {
    }

    /**
     * @inheritdoc
     */
    public function matchElement(ElementInterface $element): bool
    {
        $query = $element
            ->find()
            ->draftOf($element);

        if ($element->getIsDraft() && $element->dateCreated) {
            $query->dateCreated("< {$element->dateCreated->format(\DateTime::ATOM)}");
        }

        return $this->matchValue($query->exists());
    }
}

Element condition for Craft CMS that adds simple field-level locking.