[MM-30000] Inconsistent behaviour in channel mentions in message attachments

[larkox]

Summary

This ticket was originally filed on Jira: https://mattermost.atlassian.net/browse/MM-30000
When creating a channel mention link with fmt.Sprintf("~%s", channel.Name) in a message attachment, the behaviour is both inconsistent and buggy:

• If the link is contained in the Title field, it does not render as a link on mobile.

Steps to reproduce

1. Build a post such as

post := &model.Post{
	Message: message,
	Props: map[string]interface{}{
		"attachments": []*model.SlackAttachment{
			{
				Title: fmt.Sprintf("~%s", channel.Name),
				Text:    fmt.Sprintf("~%s", channel.Name),
				Pretext: fmt.Sprintf("~%s", channel.Name),
			},
		},
	},
}

2. Send the post to a user.
3. Read the post from the mobile app and test all three links.

Expected behavior

The link should in all cases redirect to the channel without a page refresh nor opening a different tab.

Possible fixes

For the mobile problem, probably the text is just not parsed through the Markdown parser.

[rafabelts]

Hi, I'd like to contribute, can you assign me the issue ?

[rafabelts]

Hi @amyblais, I have a doubt, should I fork the web app repositorie or the mobile ?

[amyblais]

I have a doubt, should I fork the web app repositorie or the mobile ?

My best guess is in the mobile repository, but I'll let @larkox confirm.

[larkox]

@rafabelts The original issue was for Mobile, but it would be awesome if you could confirm the behavior also on web and make sure both are consistent.

But for the sake of simplicity, let's start with the mobile fix, and we can continue from there 😄

[rafabelts]

Ok ok thanks!! 😁