Use federation information to join ext. signaling server

Signed-off-by: Marcel Müller <marcel-mueller@gmx.de>

NextcloudTalk/NCRoomsManagerExtensions.swift

@@ -162,7 +162,11 @@ import Foundation
             // Remember the latest sessionId we're using to join a room, to be able to check when joining the external signaling server
             self.joiningSessionId = sessionId
 
-            extSignalingController.joinRoom(token, withSessionId: sessionId) { error in
+            // TODO: For non-federated rooms, we could skip getting the settings for now
+            NCAPIController.sharedInstance().getSignalingSettings(for: activeAccount, forRoom: token) { signalingSettings, error in
+                let federation = signalingSettings?.getFederationJoinDictionary()
+
+                extSignalingController.joinRoom(token, withSessionId: sessionId, withFederation: federation) { error in
                     // If the sessionId is not the same anymore we tried to join with, we either already left again before
                     // joining the external signaling server succeeded, or we already have another join in process
                     if !self.isJoiningRoom(withToken: token) {
@@ -185,6 +189,7 @@ import Foundation
                         completionBlock(nil, nil, error, statusCode, statusReason)
                     }
                 }
+            }
         })
     }
 
@@ -200,7 +205,7 @@ import Foundation
                 roomController.inChat = true
 
                 if let extSignalingController = NCSettingsController.sharedInstance().externalSignalingController(forAccountId: activeAccount.accountId) {
-                    extSignalingController.joinRoom(token, withSessionId: sessionId, withCompletionBlock: nil)
+                    extSignalingController.joinRoom(token, withSessionId: sessionId, withFederation: nil, withCompletionBlock: nil)
                 }
             } else {
                 print("Could not re-join room. Status code: \(statusCode). Error: \(error?.localizedDescription ?? "Unknown")")