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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\LookupRef;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
use PhpOffice\PhpSpreadsheet\Calculation\LookupRef;
class Lookup
{
use ArrayEnabled;
/**
* LOOKUP
* The LOOKUP function searches for value either from a one-row or one-column range or from an array.
*
* @param mixed $lookupValue The value that you want to match in lookup_array
* @param mixed $lookupVector The range of cells being searched
* @param null|mixed $resultVector The column from which the matching value must be returned
*
* @return mixed The value of the found cell
*/
public static function lookup($lookupValue, $lookupVector, $resultVector = null)
{
if (is_array($lookupValue)) {
return self::evaluateArrayArgumentsSubset([self::class, __FUNCTION__], 1, $lookupValue, $lookupVector, $resultVector);
}
if (!is_array($lookupVector)) {
return ExcelError::NA();
}
$hasResultVector = isset($resultVector);
$lookupRows = self::rowCount($lookupVector);
$lookupColumns = self::columnCount($lookupVector);
// we correctly orient our results
if (($lookupRows === 1 && $lookupColumns > 1) || (!$hasResultVector && $lookupRows === 2 && $lookupColumns !== 2)) {
$lookupVector = LookupRef\Matrix::transpose($lookupVector);
$lookupRows = self::rowCount($lookupVector);
$lookupColumns = self::columnCount($lookupVector);
}
$resultVector = self::verifyResultVector($lookupVector, $resultVector);
if ($lookupRows === 2 && !$hasResultVector) {
$resultVector = array_pop($lookupVector);
$lookupVector = array_shift($lookupVector);
}
if ($lookupColumns !== 2) {
$lookupVector = self::verifyLookupValues($lookupVector, $resultVector);
}
return VLookup::lookup($lookupValue, $lookupVector, 2);
}
private static function verifyLookupValues(array $lookupVector, array $resultVector): array
{
foreach ($lookupVector as &$value) {
if (is_array($value)) {
$k = array_keys($value);
$key1 = $key2 = array_shift($k);
++$key2;
$dataValue1 = $value[$key1];
} else {
$key1 = 0;
$key2 = 1;
$dataValue1 = $value;
}
$dataValue2 = array_shift($resultVector);
if (is_array($dataValue2)) {
$dataValue2 = array_shift($dataValue2);
}
$value = [$key1 => $dataValue1, $key2 => $dataValue2];
}
unset($value);
return $lookupVector;
}
private static function verifyResultVector(array $lookupVector, $resultVector)
{
if ($resultVector === null) {
$resultVector = $lookupVector;
}
$resultRows = self::rowCount($resultVector);
$resultColumns = self::columnCount($resultVector);
// we correctly orient our results
if ($resultRows === 1 && $resultColumns > 1) {
$resultVector = LookupRef\Matrix::transpose($resultVector);
}
return $resultVector;
}
private static function rowCount(array $dataArray): int
{
return count($dataArray);
}
private static function columnCount(array $dataArray): int
{
$rowKeys = array_keys($dataArray);
$row = array_shift($rowKeys);
return count($dataArray[$row]);
}
}
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