Add tombstone enum

lib/src/event.dart

@@ -126,7 +126,8 @@ class Event {
   }
 
   /// Get a State event from a table row or from the event stream.
-  factory Event.fromJson(Map<String, dynamic> jsonPayload, Room room, [double sortOrder]) {
+  factory Event.fromJson(Map<String, dynamic> jsonPayload, Room room,
+      [double sortOrder]) {
     final content = Event.getMapFromPayload(jsonPayload['content']);
     final unsigned = Event.getMapFromPayload(jsonPayload['unsigned']);
     final prevContent = Event.getMapFromPayload(jsonPayload['prev_content']);
@@ -242,6 +243,8 @@ class Event {
         return EventTypes.Encrypted;
       case 'm.room.encryption':
         return EventTypes.Encryption;
+      case 'm.room.tombsone':
+        return EventTypes.RoomTombstone;
       case 'm.call.invite':
         return EventTypes.CallInvite;
       case 'm.call.answer':
@@ -512,7 +515,8 @@ class Event {
       uint8list =
           (await http.get(mxContent.getDownloadLink(room.client))).bodyBytes;
       if (storeable) {
-        await room.client.database.storeFile(mxContent.toString(), uint8list, DateTime.now());
+        await room.client.database
+            .storeFile(mxContent.toString(), uint8list, DateTime.now());
       }
     }
 
@@ -559,6 +563,9 @@ class Event {
       case EventTypes.RoomCreate:
         localizedBody = i18n.createdTheChat(senderName);
         break;
+      case EventTypes.RoomTombstone:
+        localizedBody = i18n.roomHasBeenUpgraded;
+        break;
       case EventTypes.RoomJoinRules:
         var joinRules = JoinRules.values.firstWhere(
             (r) =>
@@ -792,6 +799,7 @@ enum EventTypes {
   RoomName,
   RoomTopic,
   RoomAvatar,
+  RoomTombstone,
   GuestAccess,
   HistoryVisibility,
   Encryption,

lib/src/utils/matrix_localizations.dart

@@ -31,6 +31,8 @@ abstract class MatrixLocalizations {
 
   String get you;
 
+  String get roomHasBeenUpgraded;
+
   String groupWith(String displayname);
 
   String removedBy(String calcDisplayname);