fix(files_sharing): Also set the expiration date timezone during validation

This is needed as we want to store the difference between the server's and the user's timezones.

Signed-off-by: Louis Chemineau <louis@chmn.me>

Author: artonge

lib/private/Share20/Manager.php

@@ -276,10 +276,11 @@ protected function validateExpirationDateInternal(IShare $share) {
 
 		// If $expirationDate is falsy, noExpirationDate is true and expiration not enforced
 		// Then skip expiration date validation as null is accepted
-		if(!($share->getNoExpirationDate() && !$isEnforced)) {
-			if ($expirationDate != null) {
+		if(!$share->getNoExpirationDate() || $isEnforced) {
+			if ($expirationDate !== null) {
 				$expirationDate->setTimezone($this->dateTimeZone->getTimeZone());
 				$expirationDate->setTime(0, 0, 0);
+				$expirationDate->setTimezone(new \DateTimeZone(date_default_timezone_get()));
 
 				$date = new \DateTime('now', $this->dateTimeZone->getTimeZone());
 				$date->setTime(0, 0, 0);
@@ -300,6 +301,7 @@ protected function validateExpirationDateInternal(IShare $share) {
 			if ($fullId === null && $expirationDate === null && $defaultExpireDate) {
 				$expirationDate = new \DateTime('now', $this->dateTimeZone->getTimeZone());
 				$expirationDate->setTime(0, 0, 0);
+				$expirationDate->setTimezone(new \DateTimeZone(date_default_timezone_get()));
 				$days = (int)$this->config->getAppValue('core', $configProp, (string)$defaultExpireDays);
 				if ($days > $defaultExpireDays) {
 					$days = $defaultExpireDays;