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<?php

namespace Mautic\CoreBundle\Helper;

use Mautic\CoreBundle\Model\AbstractCommonModel;

class DataExporterHelper
{
    /**
     * Standard function to generate an array of data via any model's "getEntities" method.
     *
     * Overwrite in your controller if required.
     *
     * @param int|null               $start
     * @param AbstractCommonModel<T> $model
     *
     * @template T of object
     *
     * @return array
     */
    public function getDataForExport(
        $start,
        AbstractCommonModel $model,
        array $args,
        callable $resultsCallback = null,
        bool $skipOrdering = false
    ) {
        $args['limit']        = max($args['limit'], 200);
        $args['start']        = $start;
        $args['skipOrdering'] = $skipOrdering;

        $results = $model->getEntities($args);
        $items   = $results['results'];
        if (0 === count($items)) {
            return null;
        }
        unset($results);

        $toExport = [];

        unset($args['withTotalCount']);

        if (is_callable($resultsCallback)) {
            foreach ($items as $item) {
                $row = array_map(fn ($itemEncode) => html_entity_decode((string) $itemEncode, ENT_QUOTES), $resultsCallback($item));

                $toExport[] = $this->secureAgainstCsvInjection($row);
            }
        } else {
            foreach ($items as $item) {
                $toExport[] = $this->secureAgainstCsvInjection((array) $item);
            }
        }

        $model->getRepository()->detachEntities($items);

        return $toExport;
    }

    private function secureAgainstCsvInjection(array $row): array
    {
        foreach ($row as $colNum => $colVal) {
            if ($colVal && in_array(substr($colVal, 0, 1), ['+', '-', '=', '@'])) {
                $row[$colNum] = ' '.$colVal;
            }
        }

        return $row;
    }
}