Some emojis (emoticons) break the MD parser

[Lao-Ax]

Description:

If you post a message like this one: *text:* you will not get a bold text or text with emoji.
I suppose, there is a bug in a PEG grammar: see packages/message-parser/src/grammar.pegjs

Some where between rules Bold and Emoticon. The root of this case is :* - kissing_heart emoticon.

I've thired to figure out how this PEG works, but failed.

Steps to reproduce:

1. Post a message *text:*

Expected behavior:

There is a bolded text text:

Actual behavior:

There is just a text.
Note: If you post *text :* you will get *text and an emoji.

Server Setup Information:

• Version of Rocket.Chat Server: 6.9.0 and erlier
• Operating System: any
• Deployment Method: any
• Number of Running Instances: any
• NodeJS Version: 14.21.3
• MongoDB Version: 7.3

Client Setup Information

• Desktop App or Browser Version: any
• Operating System: any

[royjohnlee]

does it happen with just post? I'm interested in looking into this and working on it

[Lao-Ax]

What do you mean by "just post"?
I meant "type and press submit". When you are editing such a text - there is the same error.

I've tried a banch of strategies and different grammars, but didn't susceed. I have a few tests but every time one of them fails :). Perhaps, it will help to someone.

1 :* // big emoji
2 *bold* // just bold
3 *bold :)* // bold with emoji 1
4 *bold :** // bold with emoji 2
5 *bold:* //  no emoji, just bold text
6 *:) bold* //bold with emoji 1
7 *:* bold* // bold with emoji 2 OR bolded ":"
8 * :) bold* //bold with emoji 1
9 * :* bold* //bold with emoji 2 OR bolded " :"

[reetp]

Thanks for opening this bug.

I suspect it is also related to this which is being looked at.

Whether it is a Rocket bug or a more generic limitation or parser bug I don't know.

#32544