From e3991fbde0e97ad31af44c9f2506a8a1208d8f53 Mon Sep 17 00:00:00 2001
From: tobiasKaminsky <tobias@kaminsky.me>
Date: Tue, 26 Feb 2019 08:15:32 +0100
Subject: [PATCH] Show sharees via propfind

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>
---
 apps/dav/lib/Connector/Sabre/FilesPlugin.php |  6 ++-
 apps/dav/lib/Connector/Sabre/Node.php        | 57 ++++++++++++++++++++
 2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/apps/dav/lib/Connector/Sabre/FilesPlugin.php b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
index 99317f2bc1c..4a15edfdf46 100644
--- a/apps/dav/lib/Connector/Sabre/FilesPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
@@ -71,6 +71,7 @@ class FilesPlugin extends ServerPlugin {
 	const MOUNT_TYPE_PROPERTYNAME = '{http://nextcloud.org/ns}mount-type';
 	const IS_ENCRYPTED_PROPERTYNAME = '{http://nextcloud.org/ns}is-encrypted';
 	const SHARE_NOTE = '{http://nextcloud.org/ns}note';
+	const SHAREES_PROPERTYNAME = '{http://nextcloud.org/ns}sharees';
 
 	/**
 	 * Reference to main server object
@@ -163,6 +164,7 @@ class FilesPlugin extends ServerPlugin {
 		$server->protectedProperties[] = self::MOUNT_TYPE_PROPERTYNAME;
 		$server->protectedProperties[] = self::IS_ENCRYPTED_PROPERTYNAME;
 		$server->protectedProperties[] = self::SHARE_NOTE;
+		$server->protectedProperties[] = self::SHAREES_PROPERTYNAME;
 
 		// normally these cannot be changed (RFC4918), but we want them modifiable through PROPPATCH
 		$allowedProperties = ['{DAV:}getetag'];
@@ -361,12 +363,14 @@ class FilesPlugin extends ServerPlugin {
 			$propFind->handle(self::MOUNT_TYPE_PROPERTYNAME, function () use ($node) {
 				return $node->getFileInfo()->getMountPoint()->getMountType();
 			});
-
 			$propFind->handle(self::SHARE_NOTE, function() use ($node, $httpRequest) {
 				return $node->getNoteFromShare(
 					$httpRequest->getRawServerValue('PHP_AUTH_USER')
 				);
 			});
+			$propFind->handle(self::SHAREES_PROPERTYNAME, function() use ($node, $httpRequest) {
+				return $node->getShareeFromShare($httpRequest->getRawServerValue('PHP_AUTH_USER'));
+			});
 		}
 
 		if ($node instanceof \OCA\DAV\Connector\Sabre\Node) {
diff --git a/apps/dav/lib/Connector/Sabre/Node.php b/apps/dav/lib/Connector/Sabre/Node.php
index f0917fe11b2..4cf6835b89d 100644
--- a/apps/dav/lib/Connector/Sabre/Node.php
+++ b/apps/dav/lib/Connector/Sabre/Node.php
@@ -43,6 +43,7 @@ use OCP\Share\Exceptions\ShareNotFound;
 use OCP\Share\IManager;
 use OCP\Share;
 use OCP\Share\IShare;
+use OCP\Lock\ILockingProvider;
 
 
 abstract class Node implements \Sabre\DAV\INode {
@@ -323,6 +324,62 @@ abstract class Node implements \Sabre\DAV\INode {
 		return '';
 	}
 
+	/**
+	 * @param string $user
+	 * @return string
+	 */
+	public function getShareeFromShare($user) {
+		$sharees = [];
+
+		if ($user == null) {
+			return $sharees;
+		}
+		$types = [
+			Share::SHARE_TYPE_USER,
+			Share::SHARE_TYPE_REMOTE, 
+			Share::SHARE_TYPE_GROUP,
+		];
+
+		if ($this->getPath() === "/") {
+			return $sharees;
+		}
+
+		$path = $this->getPath();
+
+		if ($path !== null) {
+			$userFolder = \OC::$server->getRootFolder()->getUserFolder($user);
+			try {
+				$path = $userFolder->get($path);
+				$this->lock($path);
+			} catch (\OCP\Files\NotFoundException $e) {
+				throw new OCSNotFoundException($this->l->t('Wrong path, file/folder doesn\'t exist'));
+			} catch (LockedException $e) {
+				throw new OCSNotFoundException($this->l->t('Could not lock path'));
+			}
+		}
+
+		foreach ($types as $shareType) {
+			$shares = $this->shareManager->getSharesBy($user, $shareType, $path, false, -1, 0);
+			foreach ($shares as $share) {
+				if ($share->getSharedBy() === $user) {
+					$sharees[] = $share->getSharedWith();
+				}
+			}
+		}
+		return implode(', ', $sharees);
+	}
+
+	/**
+	 * Lock a Node
+	 *
+	 * @param \OCP\Files\Node $node
+	 * @throws LockedException
+	 */
+	private function lock(\OCP\Files\Node $node) {
+		$node->lock(ILockingProvider::LOCK_SHARED);
+		$this->lockedNode = $node;
+	}
+
 	/**
 	 * @return string
 	 */
-- 
2.39.5