It's very simple import script and currently imports only the following content:
* Users
* Messages as Discourse topics/posts
* Attachments
Each channel can be mapped to a category and tags. It uses regular expressions to convert formatted messages ("rich text") into Markdown used by Discourse. In the future we could convert the `blocks` attribute from each message into Markdown instead of applying regular expressions on the `text` attribute.
Gerhard Schlager