App\services\ImportService::executeCSV PHP Method

    private function executeCSV($entityType, $map, $hasHeaders)
    {
        $results = [RESULT_SUCCESS => [], RESULT_FAILURE => []];
        $source = IMPORT_CSV;
        $data = Session::get("{$entityType}-data");
        $this->checkData($entityType, count($data));
        $this->initMaps();
        // Convert the data
        $row_list = [];
        foreach ($data as $row) {
            if ($hasHeaders) {
                $hasHeaders = false;
                continue;
            }
            $row = $this->convertToObject($entityType, $row, $map);
            $data_index = $this->transformRow($source, $entityType, $row);
            if ($data_index !== false) {
                if ($data_index !== true) {
                    // Wasn't merged with another row
                    $row_list[] = ['row' => $row, 'data_index' => $data_index];
                }
            } else {
                $results[RESULT_FAILURE][] = $row;
            }
        }
        // Save the data
        foreach ($row_list as $row_data) {
            $result = $this->saveData($source, $entityType, $row_data['row'], $row_data['data_index']);
            if ($result) {
                $results[RESULT_SUCCESS][] = $result;
            } else {
                $results[RESULT_FAILURE][] = $row;
            }
        }
        Session::forget("{$entityType}-data");
        return $results;
    }