Research: Newline rendering in Teams messages via Office 365 Connector Cards

[atc0005]

While researching whether Markdown tables are supported via webhook requests (spoiler: it does not appear so), I stumbled across this line:

In connector cards, newlines are rendered for \n\n, but not for \n or \r.

This is particularly useful to know, as I ended up going this route to work around the discovered behavior:

• https://github.com/atc0005/send2teams/blob/170ac3bc6932c575174dd9ab1ccf84b39a001776/teams/teams.go#L31-L49

• https://github.com/atc0005/send2teams/blob/170ac3bc6932c575174dd9ab1ccf84b39a001776/teams/teams.go#L255-L271

I don't recall off the top of my head where I learned that <br> was a good replacement, but it served the use case. Now it sounds like the ConvertEOLToBreak() function can be deprecated and one put in its place to substitute \n\n instead.

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• https://docs.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/cards/cards-format?tabs=connector-md%2Cconnector-html

[atc0005]

Now it sounds like the ConvertEOLToBreak() function can be deprecated and one put in its place to substitute \n\n instead.

Or it can remain, and be adapted to handle replacing a literal single use of \n with \n\n instead of <br>. This would allow the API surface it remain as is.

[atc0005]

Now that recent work has been done to move the formatting functions of this project (atc0005/send2teams) into the atc0005/go-teams-notify project, I think this GH issue will follow suit and move to that project for future work as well.