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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\DateTimeExcel;
use DateTime;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
use PhpOffice\PhpSpreadsheet\Shared\Date as SharedDateHelper;
class Helpers
{
/**
* Identify if a year is a leap year or not.
*
* @param int|string $year The year to test
*
* @return bool TRUE if the year is a leap year, otherwise FALSE
*/
public static function isLeapYear($year): bool
{
return (($year % 4) === 0) && (($year % 100) !== 0) || (($year % 400) === 0);
}
/**
* getDateValue.
*
* @param mixed $dateValue
*
* @return float Excel date/time serial value
*/
public static function getDateValue($dateValue, bool $allowBool = true): float
{
if (is_object($dateValue)) {
$retval = SharedDateHelper::PHPToExcel($dateValue);
if (is_bool($retval)) {
throw new Exception(ExcelError::VALUE());
}
return $retval;
}
self::nullFalseTrueToNumber($dateValue, $allowBool);
if (!is_numeric($dateValue)) {
$saveReturnDateType = Functions::getReturnDateType();
Functions::setReturnDateType(Functions::RETURNDATE_EXCEL);
$dateValue = DateValue::fromString($dateValue);
Functions::setReturnDateType($saveReturnDateType);
if (!is_numeric($dateValue)) {
throw new Exception(ExcelError::VALUE());
}
}
if ($dateValue < 0 && Functions::getCompatibilityMode() !== Functions::COMPATIBILITY_OPENOFFICE) {
throw new Exception(ExcelError::NAN());
}
return (float) $dateValue;
}
/**
* getTimeValue.
*
* @param string $timeValue
*
* @return mixed Excel date/time serial value, or string if error
*/
public static function getTimeValue($timeValue)
{
$saveReturnDateType = Functions::getReturnDateType();
Functions::setReturnDateType(Functions::RETURNDATE_EXCEL);
$timeValue = TimeValue::fromString($timeValue);
Functions::setReturnDateType($saveReturnDateType);
return $timeValue;
}
/**
* Adjust date by given months.
*
* @param mixed $dateValue
*/
public static function adjustDateByMonths($dateValue = 0, float $adjustmentMonths = 0): DateTime
{
// Execute function
$PHPDateObject = SharedDateHelper::excelToDateTimeObject($dateValue);
$oMonth = (int) $PHPDateObject->format('m');
$oYear = (int) $PHPDateObject->format('Y');
$adjustmentMonthsString = (string) $adjustmentMonths;
if ($adjustmentMonths > 0) {
$adjustmentMonthsString = '+' . $adjustmentMonths;
}
if ($adjustmentMonths != 0) {
$PHPDateObject->modify($adjustmentMonthsString . ' months');
}
$nMonth = (int) $PHPDateObject->format('m');
$nYear = (int) $PHPDateObject->format('Y');
$monthDiff = ($nMonth - $oMonth) + (($nYear - $oYear) * 12);
if ($monthDiff != $adjustmentMonths) {
$adjustDays = (int) $PHPDateObject->format('d');
$adjustDaysString = '-' . $adjustDays . ' days';
$PHPDateObject->modify($adjustDaysString);
}
return $PHPDateObject;
}
/**
* Help reduce perceived complexity of some tests.
*
* @param mixed $value
* @param mixed $altValue
*/
public static function replaceIfEmpty(&$value, $altValue): void
{
$value = $value ?: $altValue;
}
/**
* Adjust year in ambiguous situations.
*/
public static function adjustYear(string $testVal1, string $testVal2, string &$testVal3): void
{
if (!is_numeric($testVal1) || $testVal1 < 31) {
if (!is_numeric($testVal2) || $testVal2 < 12) {
if (is_numeric($testVal3) && $testVal3 < 12) {
$testVal3 += 2000;
}
}
}
}
/**
* Return result in one of three formats.
*
* @return mixed
*/
public static function returnIn3FormatsArray(array $dateArray, bool $noFrac = false)
{
$retType = Functions::getReturnDateType();
if ($retType === Functions::RETURNDATE_PHP_DATETIME_OBJECT) {
return new DateTime(
$dateArray['year']
. '-' . $dateArray['month']
. '-' . $dateArray['day']
. ' ' . $dateArray['hour']
. ':' . $dateArray['minute']
. ':' . $dateArray['second']
);
}
$excelDateValue =
SharedDateHelper::formattedPHPToExcel(
$dateArray['year'],
$dateArray['month'],
$dateArray['day'],
$dateArray['hour'],
$dateArray['minute'],
$dateArray['second']
);
if ($retType === Functions::RETURNDATE_EXCEL) {
return $noFrac ? floor($excelDateValue) : (float) $excelDateValue;
}
// RETURNDATE_UNIX_TIMESTAMP)
return (int) SharedDateHelper::excelToTimestamp($excelDateValue);
}
/**
* Return result in one of three formats.
*
* @return mixed
*/
public static function returnIn3FormatsFloat(float $excelDateValue)
{
$retType = Functions::getReturnDateType();
if ($retType === Functions::RETURNDATE_EXCEL) {
return $excelDateValue;
}
if ($retType === Functions::RETURNDATE_UNIX_TIMESTAMP) {
return (int) SharedDateHelper::excelToTimestamp($excelDateValue);
}
// RETURNDATE_PHP_DATETIME_OBJECT
return SharedDateHelper::excelToDateTimeObject($excelDateValue);
}
/**
* Return result in one of three formats.
*
* @return mixed
*/
public static function returnIn3FormatsObject(DateTime $PHPDateObject)
{
$retType = Functions::getReturnDateType();
if ($retType === Functions::RETURNDATE_PHP_DATETIME_OBJECT) {
return $PHPDateObject;
}
if ($retType === Functions::RETURNDATE_EXCEL) {
return (float) SharedDateHelper::PHPToExcel($PHPDateObject);
}
// RETURNDATE_UNIX_TIMESTAMP
$stamp = SharedDateHelper::PHPToExcel($PHPDateObject);
$stamp = is_bool($stamp) ? ((int) $stamp) : $stamp;
return (int) SharedDateHelper::excelToTimestamp($stamp);
}
private static function baseDate(): int
{
if (Functions::getCompatibilityMode() === Functions::COMPATIBILITY_OPENOFFICE) {
return 0;
}
if (SharedDateHelper::getExcelCalendar() === SharedDateHelper::CALENDAR_MAC_1904) {
return 0;
}
return 1;
}
/**
* Many functions accept null/false/true argument treated as 0/0/1.
*
* @param mixed $number
*/
public static function nullFalseTrueToNumber(&$number, bool $allowBool = true): void
{
$number = Functions::flattenSingleValue($number);
$nullVal = self::baseDate();
if ($number === null) {
$number = $nullVal;
} elseif ($allowBool && is_bool($number)) {
$number = $nullVal + (int) $number;
}
}
/**
* Many functions accept null argument treated as 0.
*
* @param mixed $number
*
* @return float|int
*/
public static function validateNumericNull($number)
{
$number = Functions::flattenSingleValue($number);
if ($number === null) {
return 0;
}
if (is_int($number)) {
return $number;
}
if (is_numeric($number)) {
return (float) $number;
}
throw new Exception(ExcelError::VALUE());
}
/**
* Many functions accept null/false/true argument treated as 0/0/1.
*
* @param mixed $number
*
* @return float
*/
public static function validateNotNegative($number)
{
if (!is_numeric($number)) {
throw new Exception(ExcelError::VALUE());
}
if ($number >= 0) {
return (float) $number;
}
throw new Exception(ExcelError::NAN());
}
public static function silly1900(DateTime $PHPDateObject, string $mod = '-1 day'): void
{
$isoDate = $PHPDateObject->format('c');
if ($isoDate < '1900-03-01') {
$PHPDateObject->modify($mod);
}
}
public static function dateParse(string $string): array
{
return self::forceArray(date_parse($string));
}
public static function dateParseSucceeded(array $dateArray): bool
{
return $dateArray['error_count'] === 0;
}
/**
* Despite documentation, date_parse probably never returns false.
* Just in case, this routine helps guarantee it.
*
* @param array|false $dateArray
*/
private static function forceArray($dateArray): array
{
return is_array($dateArray) ? $dateArray : ['error_count' => 1];
}
}
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