Add AuthenticationService and RegistrationWizard. (#6056)

RiotSwiftUI/Modules/Authentication/Common/Service/MatrixSDK/SessionCreator.swift

@@ -0,0 +1,38 @@
+// 
+// Copyright 2022 New Vector Ltd
+//
+// 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
+
+/// A WIP class that has common functionality to create a new session.
+class SessionCreator {
+    /// Creates an `MXSession` using the supplied credentials and REST client.
+    func createSession(credentials: MXCredentials, client: MXRestClient) -> MXSession {
+        // Report the new account in account manager
+        if credentials.identityServer == nil {
+            #warning("Check that the client is actually updated with this info?")
+            credentials.identityServer = client.identityServer
+        }
+        
+        let account = MXKAccount(credentials: credentials)
+        
+        if let identityServer = credentials.identityServer {
+            account.identityServerURL = identityServer
+        }
+        
+        MXKAccountManager.shared().addAccount(account, andOpenSession: true)
+        return account.mxSession
+    }
+}