feat: add displayname and homeserver migration to legacy (MESSENGER-7565)

bwi/MigrationAssistent/MigrationAssistant.swift

@@ -0,0 +1,46 @@
+//
+/*
+ * Copyright (c) 2025 BWI GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import Foundation
+import MatrixSDK
+
+// bwi #7565 has to be a class to be called by Objective C
+// reads user name and displayName from session and stores in shared keychain
+
+@objcMembers class MigrationAssistant : NSObject {
+    func storeDisplayname( session: MXSession ) -> Bool {
+        
+        var returnValue = false
+        
+        if let displayname = session.myUser.displayName {
+            let ossStatus = SharedKeychain.save(account: "migration_displayname", value: displayname)
+            returnValue = ossStatus == errSecSuccess
+        }
+        
+        return returnValue
+    }
+    
+    func storeHomeserver( session: MXSession ) -> Bool {
+        var returnValue = false
+        
+        if let displayname = session.matrixRestClient.homeserver {
+            returnValue = SharedKeychain.save(account: "migration_homeserver", value: displayname) == errSecSuccess
+        }
+        
+        return returnValue
+    }
+}