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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\LookupRef;
use Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Cell\Cell;
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
class Indirect
{
/**
* Determine whether cell address is in A1 (true) or R1C1 (false) format.
*
* @param mixed $a1fmt Expect bool Helpers::CELLADDRESS_USE_A1 or CELLADDRESS_USE_R1C1,
* but can be provided as numeric which is cast to bool
*/
private static function a1Format($a1fmt): bool
{
$a1fmt = Functions::flattenSingleValue($a1fmt);
if ($a1fmt === null) {
return Helpers::CELLADDRESS_USE_A1;
}
if (is_string($a1fmt)) {
throw new Exception(Functions::VALUE());
}
return (bool) $a1fmt;
}
/**
* Convert cellAddress to string, verify not null string.
*
* @param array|string $cellAddress
*/
private static function validateAddress($cellAddress): string
{
$cellAddress = Functions::flattenSingleValue($cellAddress);
if (!is_string($cellAddress) || !$cellAddress) {
throw new Exception(Functions::REF());
}
return $cellAddress;
}
/**
* INDIRECT.
*
* Returns the reference specified by a text string.
* References are immediately evaluated to display their contents.
*
* Excel Function:
* =INDIRECT(cellAddress, bool) where the bool argument is optional
*
* @param array|string $cellAddress $cellAddress The cell address of the current cell (containing this formula)
* @param mixed $a1fmt Expect bool Helpers::CELLADDRESS_USE_A1 or CELLADDRESS_USE_R1C1,
* but can be provided as numeric which is cast to bool
* @param Cell $pCell The current cell (containing this formula)
*
* @return array|string An array containing a cell or range of cells, or a string on error
*/
public static function INDIRECT($cellAddress, $a1fmt, Cell $pCell)
{
try {
$a1 = self::a1Format($a1fmt);
$cellAddress = self::validateAddress($cellAddress);
} catch (Exception $e) {
return $e->getMessage();
}
[$cellAddress, $pSheet, $sheetName] = Helpers::extractWorksheet($cellAddress, $pCell);
[$cellAddress1, $cellAddress2, $cellAddress] = Helpers::extractCellAddresses($cellAddress, $a1, $pCell->getWorkSheet(), $sheetName);
if (
(!preg_match('/^' . Calculation::CALCULATION_REGEXP_CELLREF . '$/i', $cellAddress1, $matches)) ||
(($cellAddress2 !== null) && (!preg_match('/^' . Calculation::CALCULATION_REGEXP_CELLREF . '$/i', $cellAddress2, $matches)))
) {
return Functions::REF();
}
return self::extractRequiredCells($pSheet, $cellAddress);
}
/**
* Extract range values.
*
* @return mixed Array of values in range if range contains more than one element.
* Otherwise, a single value is returned.
*/
private static function extractRequiredCells(?Worksheet $pSheet, string $cellAddress)
{
return Calculation::getInstance($pSheet !== null ? $pSheet->getParent() : null)
->extractCellRange($cellAddress, $pSheet, false);
}
}