Fix parsing invalid sticker events, improve error handling

commet/lib/client/matrix/matrix_client.dart

@@ -159,8 +159,8 @@ class MatrixClient extends Client {
             try {
               await client.init(true, isBackgroundService: isBackgroundService);
             } catch (error, trace) {
-              Log.e("Unable to load client $clientName from database");
-              Log.onError(error, trace);
+              Log.onError(error, trace,
+                  content: "Unable to load client $clientName from database");
 
               client.self = ErrorProfile();
               manager.alertManager.addAlert(Alert(AlertType.warning,

commet/lib/client/matrix/matrix_room.dart

@@ -409,35 +409,49 @@ class MatrixRoom extends Room {
 
   TimelineEvent convertEvent(matrix.Event event, {matrix.Timeline? timeline}) {
     var c = client as MatrixClient;
+    try {
+      if (event.redacted) {
+        return MatrixTimelineEventUnknown(event, client: c);
+      }
 
-    if (event.redacted) {
-      return MatrixTimelineEventUnknown(event, client: c);
-    }
+      if (event.type == matrix.EventTypes.Message) {
+        if (event.relationshipType == "m.replace")
+          return MatrixTimelineEventEdit(event, client: c);
+        if (event.content["chat.commet.type"] == "chat.commet.sticker" &&
+            event.content['url'] is String)
+          return MatrixTimelineEventSticker(event, client: c);
+
+        if (event.messageType == "m.emote")
+          return MatrixTimelineEventEmote(event, client: c);
 
-    if (event.type == matrix.EventTypes.Message) {
-      if (event.relationshipType == "m.replace")
-        return MatrixTimelineEventEdit(event, client: c);
-      if (event.content["chat.commet.type"] == "chat.commet.sticker")
-        return MatrixTimelineEventSticker(event, client: c);
+        return MatrixTimelineEventMessage(event, client: c);
+      }
 
-      if (event.messageType == "m.emote")
-        return MatrixTimelineEventEmote(event, client: c);
+      final result = switch (event.type) {
+        matrix.EventTypes.Sticker => event.content['url'] is String
+            ? MatrixTimelineEventSticker(event, client: c)
+            : null,
+        matrix.EventTypes.Encrypted =>
+          MatrixTimelineEventEncrypted(event, client: c),
+        matrix.EventTypes.Reaction =>
+          MatrixTimelineEventAddReaction(event, client: c),
+        matrix.EventTypes.RoomMember =>
+          MatrixTimelineEventMembership(event, client: c),
+        matrix.EventTypes.Redaction =>
+          MatrixTimelineEventRedaction(event, client: c),
+        _ => null
+      };
 
-      return MatrixTimelineEventMessage(event, client: c);
+      if (result != null) {
+        return result;
+      } else {
+        return MatrixTimelineEventUnknown(event, client: c);
+      }
+    } catch (err, trace) {
+      Log.e("Failed to parse event ${event.eventId} in room ${event.roomId}");
+      Log.onError(err, trace, content: "Failed to parse event: ${event.type}");
+      return MatrixTimelineEventUnknown(event, client: c);
     }
-
-    return switch (event.type) {
-      matrix.EventTypes.Sticker => MatrixTimelineEventSticker(event, client: c),
-      matrix.EventTypes.Encrypted =>
-        MatrixTimelineEventEncrypted(event, client: c),
-      matrix.EventTypes.Reaction =>
-        MatrixTimelineEventAddReaction(event, client: c),
-      matrix.EventTypes.RoomMember =>
-        MatrixTimelineEventMembership(event, client: c),
-      matrix.EventTypes.Redaction =>
-        MatrixTimelineEventRedaction(event, client: c),
-      _ => MatrixTimelineEventUnknown(event, client: c)
-    };
   }
 
   @override

commet/lib/debug/log.dart

@@ -129,10 +129,10 @@ class Log {
     _print(LogEntry(LogType.warning, str));
   }
 
-  static void onError(Object object, StackTrace trace) {
+  static void onError(Object object, StackTrace trace, {String? content}) {
     String? info = getDetailFromStackTrace(trace);
-    var entry = LogEntryException(
-        LogType.error, "${object.toString()} ($info)", object, trace);
+    var entry = LogEntryException(LogType.error,
+        content ?? "${object.toString()} ($info)", object, trace);
     _print(entry);
   }