Supporting OT Types

[rawkode]

I may be mistaken, but I believe Notus is essentially an ot-type definition with different semantics to ottypes/richtext; is this the case? If so, what would be involved in supporting other types?

I'm looking to hook Zefyr up to ShareDB, which uses ottypes/rich-text

[pulyaevskiy]

I haven't looked into ottypes that much, to be honest. In this regard the answer would be: no, Notus is not an ot-type definition and is not based or inspired by that project in any way.

However, if I read correctly, they use the same Delta format for rich-text. This means that theoretically everything should "just work" since I tried to port Delta to Dart as close as possible to original implementation.

It is easy to Notus document to Delta:

final doc = getMyDocument();
final delta = doc.toDelta();
// Delta is JSON serializable:
final json = jsonEncode(delta);

To get all individual changes in a document you need to listen on NotusDocument.changes stream. Note that you need to be aware of the source of each change, it can be either ChangeSource.local or ChangeSource.remote. This allows to prevent composing the same change twice depending on current site. I suspect that ShareDB might even abstract this details away.

Hope this helps.

[rawkode]

Thanks, @pulyaevskiy. That's very useful.