[BUG] Not being able to react to anonreplies ( message cant be found )

[lorenzo132]

Describe the bug
Reactions cannot be added to anonreply's

Bot Info
Bot version (check with @modmail about): 3.7.14dev16 - 3.7.13
Host method (Heroku, self-host, etc): Heroku, vps

To Reproduce
Steps to reproduce the behavior:

1. Who can reproduce (ex. anyone, owners)? Anyone with access to reply in threads / that can dm the modmail
2. Where can it be reproduced (ex. in thread channels, recipient DM's)? In dm's and the thread channel.
3. Done what to cause the error? Send a message using anonreply and try to add a reaction to that message
4. Any recently made changes to your bot? No changes were made.
5. Errored

Error Logs
If your Modmail bot is online, type @modmail debug hastebin and include the link here. https://hastebin.cc/ulivocuyar

2020-12-24 12:19:57 main[1197] - WARNING: Failed to find linked message for reactions: Thread channel message not found.

Screenshots
Add screenshots to help explain your problem.
Message in DM: https://cdn.discordapp.com/attachments/670653022317182991/791762588500623420/CK4Y14Us.png
Message in thread: https://cdn.discordapp.com/attachments/670653022317182991/791762590112022548/FG4EErQY.png

Additional context
Add any other context about the problem here.

[ririko5834]

Same problem, I am getting this often in console

[Jerrie-Aries]

I know what causes this error, and I guess I found a solution for it.

It was because author.url for anon reply in thread channel and author.url in DM channel are different.

For example:
-Author URL in thread channel:
https://discordapp.com/users/6090xxxxx279005205#792896547163209738
-Author URL in DM channel:
https://discordapp.com/channels/6684xxxxx365892109#792896547163209738

However the ID in both URLs are still the same but we don't have a block of code in 'find_linked_message_from_dm' function to compare those IDs, like we have in 'find_linked_message' function.

So what I did to solve this was I added couple lines of codes in 'find_linked_message_from_dm' to compare those IDs. See the image.

Maybe you guys can check that out.

[fourjr]

Hey, it would be great if you can create a pull request, appropriate credit will be given.

[Jerrie-Aries]

Hey, I'm sorry about this but I'm not really sure how Git flow works. Ha-ha. I'm afraid I'd mess something up...lol.
Since it's been done already, so no worries.