Update user share must use correct expiration validation

Updating a user or group share now uses the correct method for the
validation of the expiration date. Instead of using the one from links
it uses the one for internal shares.

To avoid future confusion, the method "validateExpirationDate" has been
renamed to "validateExpirationDateLink".

Signed-off-by: Vincent Petry <vincent@nextcloud.com>

lib/private/Share20/Manager.php

@@ -458,7 +458,7 @@ protected function validateExpirationDateInternal(\OCP\Share\IShare $share) {
 	 * @throws \InvalidArgumentException
 	 * @throws \Exception
 	 */
-	protected function validateExpirationDate(\OCP\Share\IShare $share) {
+	protected function validateExpirationDateLink(\OCP\Share\IShare $share) {
 		$expirationDate = $share->getExpirationDate();
 
 		if ($expirationDate !== null) {
@@ -761,7 +761,7 @@ public function createShare(\OCP\Share\IShare $share) {
 			);
 
 			//Verify the expiration date
-			$share = $this->validateExpirationDate($share);
+			$share = $this->validateExpirationDateLink($share);
 
 			//Verify the password
 			$this->verifyPassword($share->getPassword());
@@ -969,15 +969,15 @@ public function updateShare(\OCP\Share\IShare $share) {
 
 			if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
 				//Verify the expiration date
-				$this->validateExpirationDate($share);
+				$this->validateExpirationDateInternal($share);
 				$expirationDateUpdated = true;
 			}
 		} elseif ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
 			$this->groupCreateChecks($share);
 
 			if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
 				//Verify the expiration date
-				$this->validateExpirationDate($share);
+				$this->validateExpirationDateInternal($share);
 				$expirationDateUpdated = true;
 			}
 		} elseif ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
@@ -993,7 +993,7 @@ public function updateShare(\OCP\Share\IShare $share) {
 
 			if ($share->getExpirationDate() != $originalShare->getExpirationDate()) {
 				//Verify the expiration date
-				$this->validateExpirationDate($share);
+				$this->validateExpirationDateLink($share);
 				$expirationDateUpdated = true;
 			}
 		} elseif ($share->getShareType() === \OCP\Share::SHARE_TYPE_EMAIL) {