Fix multi device open group syncing

Signal/src/Loki/View Controllers/JoinPublicChatVC.swift

@@ -152,6 +152,8 @@ final class JoinPublicChatVC : BaseVC, UIPageViewControllerDataSource, UIPageVie
             let _ = LokiPublicChatAPI.getMessages(for: channelID, on: urlAsString)
             let _ = LokiPublicChatAPI.setDisplayName(to: displayName, on: urlAsString)
             let _ = LokiPublicChatAPI.join(channelID, on: urlAsString)
+            let syncManager = SSKEnvironment.shared.syncManager
+            let _ = syncManager.syncAllOpenGroups()
             self?.presentingViewController!.dismiss(animated: true, completion: nil)
         }
         .catch(on: .main) { [weak self] _ in

SignalServiceKit/src/Loki/API/Open Groups/LokiPublicChatManager.swift

@@ -125,7 +125,7 @@ public final class LokiPublicChatManager : NSObject {
         refreshChatsAndPollers()
     }
     
-    private func getChat(server: String, channel: UInt64) -> LokiPublicChat? {
+    public func getChat(server: String, channel: UInt64) -> LokiPublicChat? {
         return chats.values.first { chat in
             return chat.server == server && chat.channel == channel
         }

SignalServiceKit/src/Loki/Protocol/Sync Messages/SyncMessagesProtocol.swift

@@ -223,14 +223,16 @@ public final class SyncMessagesProtocol : NSObject {
     public static func handleOpenGroupSyncMessageIfNeeded(_ syncMessage: SSKProtoSyncMessage, wrappedIn envelope: SSKProtoEnvelope, using transaction: YapDatabaseReadTransaction) {
         // The envelope source is set during UD decryption
         let hexEncodedPublicKey = envelope.source!
-        guard let masterHexEncodedPublicKey = storage.getMasterHexEncodedPublicKey(for: getUserHexEncodedPublicKey(), in: transaction) else { return }
-        let wasSentByMasterDevice = (masterHexEncodedPublicKey == hexEncodedPublicKey)
-        guard wasSentByMasterDevice else { return }
+        let linkedDevices = LokiDatabaseUtilities.getLinkedDeviceHexEncodedPublicKeys(for: hexEncodedPublicKey, in: transaction)
+        let wasSentByLinkedDevice = linkedDevices.contains(hexEncodedPublicKey)
+        guard wasSentByLinkedDevice else { return }
         let groups = syncMessage.openGroups
         guard groups.count > 0 else { return }
         print("[Loki] Open group sync message received.")
         for openGroup in groups {
-            LokiPublicChatManager.shared.addChat(server: openGroup.url, channel: openGroup.channel)
+            let openGroupManager = LokiPublicChatManager.shared
+            guard openGroupManager.getChat(server: openGroup.url, channel: openGroup.channel) == nil else { return }
+            openGroupManager.addChat(server: openGroup.url, channel: openGroup.channel)
         }
     }
 }