COVIDSafe code from version 1.1

CovidSafe/Feedback/Sources/LanguageInfoExtension.swift

@@ -0,0 +1,31 @@
+//  Copyright © 2020 Australian Government All rights reserved.
+
+import Foundation
+
+extension NSLocale {
+  class var languageDisplayNameOrNil: String? {
+    // Consider going to NSBundle preferredLocalizations to get language the user is actually seeing in the running app.
+    guard let languageCode = preferredLanguages[safe: 0] else {
+      return nil
+    }
+
+    return current.localizedString(forLanguageCode: languageCode)
+  }
+
+  class var preferredLanguageDisplayName: String? {
+    guard let languageDisplayName = languageDisplayNameOrNil else {
+      return nil
+    }
+    return languageDisplayName
+  }
+
+  class var infoAsDictionary: [String: NSObject] {
+    return ["language": preferredLanguageDisplayName as NSObject? ?? "" as NSObject]
+  }
+}
+
+extension Array {
+  fileprivate subscript (safe index: UInt) -> Element? {
+    return Int(index) < count ? self[Int(index)] : nil
+  }
+}