Add API to undelete delete group shares

When a group share is deleted we keep track of this in the DB.
Right now it is only possible for a recipient to get back the share by
asking the sharer to delete it and to share it again. This doesn't
scale.

This endpoint makes it possible to get back the share.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

1 files changed, 37 insertions, 0 deletions

diff --git a/lib/private/Share20/DefaultShareProvider.php b/lib/private/Share20/DefaultShareProvider.php
index 3c56b24707c..5e52156d1d0 100644
--- a/lib/private/Share20/DefaultShareProvider.php
+++ b/lib/private/Share20/DefaultShareProvider.php
@@ -31,6 +31,7 @@ namespace OC\Share20;
 
 use OC\Files\Cache\Cache;
 use OCP\Files\Folder;
+use OCP\Share\IShare;
 use OCP\Share\IShareProvider;
 use OC\Share20\Exception\InvalidShare;
 use OC\Share20\Exception\ProviderException;
@@ -412,6 +413,41 @@ class DefaultShareProvider implements IShareProvider {
 
 	/**
 	 * @inheritdoc
+	 *
+	 * For now this only works for group shares
+	 * If this gets implemented for normal shares we have to extend it
+	 */
+	public function restore(IShare $share, string $recipient): IShare {
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->select('permissions')
+			->from('share')
+			->where(
+				$qb->expr()->eq('id', $qb->createNamedParameter($share->getId()))
+			);
+		$cursor = $qb->execute();
+		$data = $cursor->fetch();
+		$cursor->closeCursor();
+
+		$originalPermission = $data['permissions'];
+
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->update('share')
+			->set('permissions', $qb->createNamedParameter($originalPermission))
+			->where(
+				$qb->expr()->eq('parent', $qb->createNamedParameter($share->getParent()))
+			)->andWhere(
+				$qb->expr()->eq('share_type', $qb->createNamedParameter(self::SHARE_TYPE_USERGROUP))
+			)->andWhere(
+				$qb->expr()->eq('share_with', $qb->createNamedParameter($recipient))
+			);
+
+		$qb->execute();
+
+		return $this->getShareById($share->getId(), $recipient);
+	}
+
+	/**
+	 * @inheritdoc
 	 */
 	public function move(\OCP\Share\IShare $share, $recipient) {
 		if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER) {
@@ -922,6 +958,7 @@ class DefaultShareProvider implements IShareProvider {
 			while($data = $stmt->fetch()) {
 				$shareMap[$data['parent']]->setPermissions((int)$data['permissions']);
 				$shareMap[$data['parent']]->setTarget($data['file_target']);
+				$shareMap[$data['parent']]->setParent($data['parent']);
 			}
 
 			$stmt->closeCursor();