Refactored creation of UserSessionListItemViewData, added inactive session icon

RiotSwiftUI/Modules/UserSessions/Common/InactiveUserSessionLastActivityFormatter.swift

@@ -0,0 +1,33 @@
+// 
+// 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
+
+class InactiveUserSessionLastActivityFormatter {
+    private static var dateFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.locale = Locale.current
+        dateFormatter.dateStyle = .medium
+        dateFormatter.doesRelativeDateFormatting = true
+        return dateFormatter
+    }()
+    
+    func lastActivityDateString(from lastActivityTimestamp: TimeInterval) -> String {
+        let date = Date(timeIntervalSince1970: lastActivityTimestamp)
+        
+        return InactiveUserSessionLastActivityFormatter.dateFormatter.string(from: date)
+    }
+}