Correctly synchronize collection of community featured posts (fixes #3867) (#4475)

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Nutomic 2024-02-26 15:45:23 +01:00 committed by GitHub
parent 80bfd23b4d
commit 7316dd281a
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3 changed files with 62 additions and 17 deletions

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@ -6,11 +6,14 @@ use activitypub_federation::{
config::Data,
kinds::collection::OrderedCollectionType,
protocol::verification::verify_domains_match,
traits::{ActivityHandler, Collection, Object},
traits::{Collection, Object},
};
use futures::future::{join_all, try_join_all};
use lemmy_api_common::{context::LemmyContext, utils::generate_featured_url};
use lemmy_db_schema::{source::post::Post, utils::FETCH_LIMIT_MAX};
use lemmy_db_schema::{
source::{community::Community, post::Post},
utils::FETCH_LIMIT_MAX,
};
use lemmy_utils::error::LemmyError;
use url::Url;
@ -55,35 +58,36 @@ impl Collection for ApubCommunityFeatured {
async fn from_json(
apub: Self::Kind,
_owner: &Self::Owner,
data: &Data<Self::DataType>,
owner: &Self::Owner,
context: &Data<Self::DataType>,
) -> Result<Self, Self::Error>
where
Self: Sized,
{
let mut posts = apub.ordered_items;
if posts.len() as i64 > FETCH_LIMIT_MAX {
posts = posts
let mut pages = apub.ordered_items;
if pages.len() as i64 > FETCH_LIMIT_MAX {
pages = pages
.get(0..(FETCH_LIMIT_MAX as usize))
.unwrap_or_default()
.to_vec();
}
// We intentionally ignore errors here. This is because the outbox might contain posts from old
// Lemmy versions, or from other software which we cant parse. In that case, we simply skip the
// item and only parse the ones that work.
// process items in parallel, to avoid long delay from fetch_site_metadata() and other processing
join_all(posts.into_iter().map(|post| {
let stickied_posts: Vec<Post> = join_all(pages.into_iter().map(|page| {
async {
// use separate request counter for each item, otherwise there will be problems with
// parallel processing
let verify = post.verify(data).await;
if verify.is_ok() {
post.receive(data).await.ok();
}
ApubPost::verify(&page, &apub.id, context).await?;
ApubPost::from_json(page, context).await
}
}))
.await;
.await
// ignore any failed or unparseable items
.into_iter()
.filter_map(|p| p.ok().map(|p| p.0))
.collect();
Community::set_featured_posts(owner.id, stickied_posts, &mut context.pool()).await?;
// This return value is unused, so just set an empty vec
Ok(ApubCommunityFeatured(()))

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@ -166,7 +166,7 @@ impl Object for ApubCommunity {
moderators_url: group.attributed_to.clone().map(Into::into),
posting_restricted_to_mods: group.posting_restricted_to_mods,
instance_id,
featured_url: group.featured.map(Into::into),
featured_url: group.featured.clone().map(Into::into),
..Default::default()
};
let languages =
@ -184,6 +184,9 @@ impl Object for ApubCommunity {
spawn_try_task(async move {
group.outbox.dereference(&community_, &context_).await?;
group.followers.dereference(&community_, &context_).await?;
if let Some(featured) = group.featured {
featured.dereference(&community_, &context_).await?;
}
if let Some(moderators) = group.attributed_to {
moderators.dereference(&community_, &context_).await?;
}

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@ -14,6 +14,7 @@ use crate::{
CommunityPersonBanForm,
CommunityUpdateForm,
},
post::Post,
},
traits::{ApubActor, Bannable, Crud, Followable, Joinable},
utils::{functions::lower, get_conn, DbPool},
@ -27,6 +28,7 @@ use diesel::{
result::Error,
select,
sql_types,
update,
ExpressionMethods,
NullableExpressionMethods,
QueryDsl,
@ -137,6 +139,42 @@ impl Community {
}
Err(diesel::NotFound)
}
pub async fn set_featured_posts(
community_id: CommunityId,
posts: Vec<Post>,
pool: &mut DbPool<'_>,
) -> Result<(), Error> {
use crate::schema::post;
let conn = &mut get_conn(pool).await?;
for p in &posts {
debug_assert!(p.community_id == community_id);
}
conn
.build_transaction()
.run(|conn| {
Box::pin(async move {
update(
// first remove all existing featured posts
post::table,
)
.filter(post::dsl::community_id.eq(community_id))
.set(post::dsl::featured_community.eq(false))
.execute(conn)
.await?;
// then mark the given posts as featured
let post_ids: Vec<_> = posts.iter().map(|p| p.id).collect();
update(post::table)
.filter(post::dsl::id.eq_any(post_ids))
.set(post::dsl::featured_community.eq(true))
.execute(conn)
.await?;
Ok(())
}) as _
})
.await
}
}
impl CommunityModerator {