OpenGraph metadata does not get fetched when using markdown links

[PerplexedTheta]

Summary

OpenGraph metadata does not get fetched when using markdown links

Steps to reproduce

1. Enable website link previews preference must be set to true
2. Send the following link to a channel / DM, without using Markdown:
   • https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=26258
3. Observe how OpenGraph data creates a link preview
4. Send the following Markdown to a channel / DM:
   • [link](https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=26258)
5. Observe how no OpenGraph data is displayed as a link preview

Expected behavior

When the Enable website link previews preference is set to true, you would expect any linked content to generate a preview, if OpenGraph data is found to be available.

Observed behavior (that appears unintentional)

Despite having the Enable website link previews preference set to true, a link preview is not generated, if it is inserted using Markdown, as opposed to pasting links in directly as text, which does work.

Possible fixes

This is my first issue post on Mattermost!

We have been using the autolinks plugin to work around this, but have found that causes other issues (e.g. duplicating links in certain circumstances). As new & happy users of Mattermost, we are willing to learn how the project hangs together, and hopefully one day contribute back to it.

Thank you :-)

[amyblais]

Opened https://mattermost.atlassian.net/browse/MM-58151.

[mrenvoize]

Thanks for adding this to Jira Amy. It's certainly something that would benefit our community on Mattermost.