Next step in server-to-server sharing next generation, see #12285

Beside some small improvements and bug fixes this will probably the final state for OC8.

To test this you need to set up two ownCloud instances. Let's say:

URL: myPC/firstOwnCloud user: user1
URL: myPC/secondOwnCloud user: user2
Now user1 can share a file with user2 by entering the username and the URL to the second ownCloud to the share-drop-down, in this case "user2@myPC/secondOwnCloud".

The next time user2 login he will get a notification that he received a server-to-server share with the option to accept/decline it. If he accept it the share will be mounted. In both cases a event will be send back to user1 and add a notification to the activity stream that the share was accepted/declined.

If user1 decides to unshare the file again from user2 the share will automatically be removed from the second ownCloud server and user2 will see a notification in his activity stream that user1@myPC/firstOwnCloud has unshared the file/folder from him.

1 files changed, 14 insertions, 0 deletions

diff --git a/apps/files_sharing/lib/share/file.php b/apps/files_sharing/lib/share/file.php
index a5b4e75bceb..93e4af3c393 100644
--- a/apps/files_sharing/lib/share/file.php
+++ b/apps/files_sharing/lib/share/file.php
@@ -160,6 +160,20 @@ class OC_Share_Backend_File implements OCP\Share_Backend_File_Dependent {
 	}
 
 	/**
+	 * check if server2server share is enabled
+	 *
+	 * @param int $shareType
+	 * @return boolean
+	 */
+	public function isShareTypeAllowed($shareType) {
+		if ($shareType === \OCP\Share::SHARE_TYPE_REMOTE) {
+			return \OCA\Files_Sharing\Helper::isOutgoingServer2serverShareEnabled();
+		}
+
+		return true;
+	}
+
+	/**
 	 * resolve reshares to return the correct source item
 	 * @param array $source
 	 * @return array source item