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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\DateTimeExcel;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
class WorkDay
{
use ArrayEnabled;
/**
* WORKDAY.
*
* Returns the date that is the indicated number of working days before or after a date (the
* starting date). Working days exclude weekends and any dates identified as holidays.
* Use WORKDAY to exclude weekends or holidays when you calculate invoice due dates, expected
* delivery times, or the number of days of work performed.
*
* Excel Function:
* WORKDAY(startDate,endDays[,holidays[,holiday[,...]]])
*
* @param array|mixed $startDate Excel date serial value (float), PHP date timestamp (integer),
* PHP DateTime object, or a standard date string
* Or can be an array of date values
* @param array|int $endDays The number of nonweekend and nonholiday days before or after
* startDate. A positive value for days yields a future date; a
* negative value yields a past date.
* Or can be an array of int values
* @param null|mixed $dateArgs An array of dates (such as holidays) to exclude from the calculation
*
* @return array|mixed Excel date/time serial value, PHP date/time serial value or PHP date/time object,
* depending on the value of the ReturnDateType flag
* If an array of values is passed for the $startDate or $endDays,arguments, then the returned result
* will also be an array with matching dimensions
*/
public static function date($startDate, $endDays, ...$dateArgs)
{
if (is_array($startDate) || is_array($endDays)) {
return self::evaluateArrayArgumentsSubset(
[self::class, __FUNCTION__],
2,
$startDate,
$endDays,
...$dateArgs
);
}
// Retrieve the mandatory start date and days that are referenced in the function definition
try {
$startDate = Helpers::getDateValue($startDate);
$endDays = Helpers::validateNumericNull($endDays);
$holidayArray = array_map([Helpers::class, 'getDateValue'], Functions::flattenArray($dateArgs));
} catch (Exception $e) {
return $e->getMessage();
}
$startDate = (float) floor($startDate);
$endDays = (int) floor($endDays);
// If endDays is 0, we always return startDate
if ($endDays == 0) {
return $startDate;
}
if ($endDays < 0) {
return self::decrementing($startDate, $endDays, $holidayArray);
}
return self::incrementing($startDate, $endDays, $holidayArray);
}
/**
* Use incrementing logic to determine Workday.
*
* @return mixed
*/
private static function incrementing(float $startDate, int $endDays, array $holidayArray)
{
// Adjust the start date if it falls over a weekend
$startDoW = self::getWeekDay($startDate, 3);
if ($startDoW >= 5) {
$startDate += 7 - $startDoW;
--$endDays;
}
// Add endDays
$endDate = (float) $startDate + ((int) ($endDays / 5) * 7);
$endDays = $endDays % 5;
while ($endDays > 0) {
++$endDate;
// Adjust the calculated end date if it falls over a weekend
$endDow = self::getWeekDay($endDate, 3);
if ($endDow >= 5) {
$endDate += 7 - $endDow;
}
--$endDays;
}
// Test any extra holiday parameters
if (!empty($holidayArray)) {
$endDate = self::incrementingArray($startDate, $endDate, $holidayArray);
}
return Helpers::returnIn3FormatsFloat($endDate);
}
private static function incrementingArray(float $startDate, float $endDate, array $holidayArray): float
{
$holidayCountedArray = $holidayDates = [];
foreach ($holidayArray as $holidayDate) {
if (self::getWeekDay($holidayDate, 3) < 5) {
$holidayDates[] = $holidayDate;
}
}
sort($holidayDates, SORT_NUMERIC);
foreach ($holidayDates as $holidayDate) {
if (($holidayDate >= $startDate) && ($holidayDate <= $endDate)) {
if (!in_array($holidayDate, $holidayCountedArray)) {
++$endDate;
$holidayCountedArray[] = $holidayDate;
}
}
// Adjust the calculated end date if it falls over a weekend
$endDoW = self::getWeekDay($endDate, 3);
if ($endDoW >= 5) {
$endDate += 7 - $endDoW;
}
}
return $endDate;
}
/**
* Use decrementing logic to determine Workday.
*
* @return mixed
*/
private static function decrementing(float $startDate, int $endDays, array $holidayArray)
{
// Adjust the start date if it falls over a weekend
$startDoW = self::getWeekDay($startDate, 3);
if ($startDoW >= 5) {
$startDate += -$startDoW + 4;
++$endDays;
}
// Add endDays
$endDate = (float) $startDate + ((int) ($endDays / 5) * 7);
$endDays = $endDays % 5;
while ($endDays < 0) {
--$endDate;
// Adjust the calculated end date if it falls over a weekend
$endDow = self::getWeekDay($endDate, 3);
if ($endDow >= 5) {
$endDate += 4 - $endDow;
}
++$endDays;
}
// Test any extra holiday parameters
if (!empty($holidayArray)) {
$endDate = self::decrementingArray($startDate, $endDate, $holidayArray);
}
return Helpers::returnIn3FormatsFloat($endDate);
}
private static function decrementingArray(float $startDate, float $endDate, array $holidayArray): float
{
$holidayCountedArray = $holidayDates = [];
foreach ($holidayArray as $holidayDate) {
if (self::getWeekDay($holidayDate, 3) < 5) {
$holidayDates[] = $holidayDate;
}
}
rsort($holidayDates, SORT_NUMERIC);
foreach ($holidayDates as $holidayDate) {
if (($holidayDate <= $startDate) && ($holidayDate >= $endDate)) {
if (!in_array($holidayDate, $holidayCountedArray)) {
--$endDate;
$holidayCountedArray[] = $holidayDate;
}
}
// Adjust the calculated end date if it falls over a weekend
$endDoW = self::getWeekDay($endDate, 3);
/** int $endDoW */
if ($endDoW >= 5) {
$endDate += -$endDoW + 4;
}
}
return $endDate;
}
private static function getWeekDay(float $date, int $wd): int
{
$result = Functions::scalar(Week::day($date, $wd));
return is_int($result) ? $result : -1;
}
}
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