Script to Mass Delete Ghost Indices (Magento 2; smile/elasticsuite)

MassDeleteElasticsuiteGhostIndices.php

<?php

use Magento\Framework\App\Bootstrap;
use Magento\Framework\App\State;
use Magento\Framework\ObjectManagerInterface;

require __DIR__ . '/app/bootstrap.php';

class Test
{
    public function __construct(
        private readonly ObjectManagerInterface $objectManager
    ) {
        $state = $objectManager->get(State::class);
        $state->setAreaCode('crontab');
    }

    public function execute()
    {

        $indexStatsProvider = $this->objectManager->get(\Smile\ElasticsuiteIndices\Model\IndexStatsProvider::class);
        $indices = $indexStatsProvider->getElasticSuiteIndices();
        foreach ($indices as $name => $alias) {
            $indexStats = $indexStatsProvider->indexStats($name, $alias);
            if(isset($indexStats['index_status']) && $indexStats['index_status'] === \Smile\ElasticsuiteIndices\Block\Widget\Grid\Column\Renderer\IndexStatus::GHOST_STATUS) {
                $indexStatsProvider->deleteIndex($name);
            }

        }
    }
}

if (php_sapi_name() != 'cli') {
    throw new \Exception('Script can only be invoked by shell');
}

$class = new Test(Bootstrap::create(BP, $_SERVER)->getObjectManager());
$class->execute();