fix: duplicate comments

[salahmak]

Fix #4291

Sometimes, the Piped API's response contains comments that were already given in previous pages, so I have added a filter to remove them.

This might not be the best way to do it, but this is my first time working with Kotlin/Android because I found this bug annoying and wanted to do whatever it takes to fix it, so if there is a better way, please do it.

:)

[FireMasterK]

Can you give an example video where this happens?
The API shouldn't be doing that!

[salahmak]

@FireMasterK I don't currently have a video of it happening, but it usually happens when doing these steps:

1. Open comments section
2. Scroll down (load 1 or 2 more pages)
3. Open a comment's replies
4. Close the replies
5. Scroll down more comments (load more comments pages)
6. Now you should start noticing it happen

I have confirmed this by checking for duplicates in the commentPage.comments List (I didn't include the code in the commit as it was for my debugging) and it confirmed it for me after doing the above steps

[salahmak]

What I think is causing the problem is the process of loading the replies of a comment and then going back, perhaps the wrong parameters are being set or overridden. I couldn't get my head around how that transition is happening (as I'm a beginner in Kotlin)

[Bnyro]

Thank you!

[salahmak]

You're welcome @Bnyro, although I still think that this is just a workaround to make it not happen, I'm kinda sure that the cause of the bug is something else related to moving from the comments view to a replies view and then going back.

Opening replies is buggy as well, as sometimes it opens the wrong comment (I'll open a different issue for this).

[Bnyro]

Yes, I agree, but it's better to have a temporary workaround/fix instead of keeping the issue present :)