Client shows wrong host when mentioning an invalid username

[rakino]

💡 Summary

When mentioning a user (who is out of fediverse, with an invalid username for Misskey, @用户@weibo.com for example), client ignores the username and treat the host as that.

🙂 Expected Behavior

@a@example.com mentions @用户@weibo.com, which is not a valid account.

☹️ Actual Behavior

@a@example.com mentions @weibo@example.com, which is shown as @用户@weibo@example.com.com

📝 Steps to Reproduce

1. 2. 3.

📌 Environment

Misskey 12.98.0 (docker)

[outloudvi]

Seems to be reproducible.

It seems to be actually complicated because we cannot easily know if we can really tag a person or if the domain is ActivityPub-compliant. For example, Pleroma's pleroma-fe will really do a lookup through WebFinger to see if the tagged user is there, otherwise reject to tag the user and just show the text as plain text.

[Johann150]

I think there are two separate issues here:

1. Things that should not be parsed as mentions. (MFM parsing is handled in a separate repository at https://github.com/misskey-dev/mfm.js)
2. Things that should be parsed as mentions, but the account does not exist.

[Johann150]

I made a new issue for the original problem on the MFM repository.

@outloudvi what you were describing is something else so please open a separate issue if you are still concerned about it.

[marihachi]

MFMパーサー(mfm.js)としては問題を回避できるかも知れませんが、Misskeyがその形式のメンションを一般的なものとして受け入れて、問題を回避しようとするかどうかは議論が必要です。