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