I thought it would be good if making a post with a URL alerted me if the same URL has already been posted to another community/ server. Then it could offer to make the body of my post a comment under that post instead.

What do you think, and do any technical people familiar with Lemmy / Piefed / ActivityPub know if suc h a feature is possible without huge overheads?

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[–] nocturne@slrpnk.net 17 points 3 weeks ago (2 children)

One of the things I love about Mlem is their link cross post detection.

[–] mrdown@lemmy.world 2 points 3 weeks ago

Yeah, I think that's the way

[–] Seimhe@lemmy.world 1 points 3 weeks ago (1 children)

That’s cool. They’re halfway there. If there was an option to choose one to have your post added as a comment it would be perfect imo.

[–] nocturne@slrpnk.net 2 points 3 weeks ago

They’re halfway there.

I have an open issue in their git for link detection before posting. Hopefully it is coming soon.

One of the Mlem devs said the detail is done by Lemmy, the app just displays it.

[–] hendrik@palaver.p3x.de 8 points 3 weeks ago* (last edited 3 weeks ago)

PieFed has a feature pretty much like that. Once I drop a link into the new post form, it takes a while and loads a table with previous posts. Already helped me when I put in a YouTube like I rediscovered. But I had already posted it 3 months earlier... It's a very good feature to have. And probably not that difficult to implement.

[–] palordrolap@fedia.io 7 points 3 weeks ago (1 children)

Defederation of various forms would appear to make this a difficult thing to do.

There was a situation the other day where a post was called out for being a repost, but it was entirely possible that the OP couldn't see the original because their instance (let's say "A") had defederated the instance ("B") where the original poster was based. And all this was (or at least could have been) in a group on a different instance entirely ("C").

I won't say this makes it impossible, but it's clearly non-trivial.

[–] Seimhe@lemmy.world 1 points 3 weeks ago

Yes, I would assume that defederated instances would just have to be ignored. I hadn’t thought of this. Good point.

[–] mrdown@lemmy.world 5 points 3 weeks ago (1 children)

I prefer a functionality that detect cross post and show only the latest with an option to see the other duplicates. Since each community has it own rules I may not want my post to be a comment instead

[–] Seimhe@lemmy.world 1 points 3 weeks ago

Yeah. Choice is essential.

[–] Die4Ever@retrolemmy.com 3 points 3 weeks ago* (last edited 3 weeks ago)

Lemmy already does tell you this by title, so it would be cool if it did it by URL too

I think the Boost for Lemmy app does this

[–] moonpiedumplings@programming.dev 0 points 3 weeks ago

Doesn't it already do that?

When using the website it informs me if a link has already been losted, while also searching for similar posts via title.

The app I'm using (Eternity) doesn't do that tho