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<?php
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declare(strict_types=1);
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namespace OpenSpout\Reader\Common\Manager;
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use OpenSpout\Common\Entity\Cell;
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use OpenSpout\Common\Entity\Row;
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/**
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 * @internal
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 */
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final class RowManager
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{
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    /**
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     * Fills the missing indexes of a row with empty cells.
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     */
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    public function fillMissingIndexesWithEmptyCells(Row $row): void
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    {
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        $numCells = $row->getNumCells();
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        if (0 === $numCells) {
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            return;
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        }
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        $rowCells = $row->getCells();
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        $maxCellIndex = $numCells;
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        /**
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         * If the row has empty cells, calling "setCellAtIndex" will add the cell
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         * but in the wrong place (the new cell is added at the end of the array).
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         * Therefore, we need to sort the array using keys to have proper order.
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         *
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         * @see https://github.com/box/spout/issues/740
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         */
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        $needsSorting = false;
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        for ($cellIndex = 0; $cellIndex < $maxCellIndex; ++$cellIndex) {
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            if (!isset($rowCells[$cellIndex])) {
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                $row->setCellAtIndex(Cell::fromValue(''), $cellIndex);
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                $needsSorting = true;
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            }
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        }
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        if ($needsSorting) {
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            $rowCells = $row->getCells();
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            ksort($rowCells);
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            $row->setCells($rowCells);
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        }
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    }
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}