lemmy/lemmy_apub/src/http/community.rs
2020-10-19 16:29:35 +02:00

95 lines
2.9 KiB
Rust

use crate::{
http::{create_apub_response, create_apub_tombstone_response},
ActorType,
ToApub,
};
use activitystreams::{
base::{AnyBase, BaseExt, ExtendsExt},
collection::{CollectionExt, OrderedCollection, UnorderedCollection},
};
use actix_web::{body::Body, web, HttpResponse};
use lemmy_db::{community::Community, community_view::CommunityFollowerView, post::Post};
use lemmy_structs::blocking;
use lemmy_utils::LemmyError;
use lemmy_websocket::LemmyContext;
use serde::Deserialize;
#[derive(Deserialize)]
pub struct CommunityQuery {
community_name: String,
}
/// Return the ActivityPub json representation of a local community over HTTP.
pub async fn get_apub_community_http(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
) -> Result<HttpResponse<Body>, LemmyError> {
let community = blocking(context.pool(), move |conn| {
Community::read_from_name(conn, &info.community_name)
})
.await??;
if !community.deleted {
let apub = community.to_apub(context.pool()).await?;
Ok(create_apub_response(&apub))
} else {
Ok(create_apub_tombstone_response(&community.to_tombstone()?))
}
}
/// Returns an empty followers collection, only populating the size (for privacy).
pub async fn get_apub_community_followers(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
) -> Result<HttpResponse<Body>, LemmyError> {
let community = blocking(context.pool(), move |conn| {
Community::read_from_name(&conn, &info.community_name)
})
.await??;
let community_id = community.id;
let community_followers = blocking(context.pool(), move |conn| {
CommunityFollowerView::for_community(&conn, community_id)
})
.await??;
let mut collection = UnorderedCollection::new();
collection
.set_context(activitystreams::context())
.set_id(community.get_followers_url()?)
.set_total_items(community_followers.len() as u64);
Ok(create_apub_response(&collection))
}
/// Returns the community outbox, which is populated by a maximum of 20 posts (but no other
/// activites like votes or comments).
pub async fn get_apub_community_outbox(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
) -> Result<HttpResponse<Body>, LemmyError> {
let community = blocking(context.pool(), move |conn| {
Community::read_from_name(&conn, &info.community_name)
})
.await??;
let community_id = community.id;
let posts = blocking(context.pool(), move |conn| {
Post::list_for_community(conn, community_id)
})
.await??;
let mut pages: Vec<AnyBase> = vec![];
for p in posts {
pages.push(p.to_apub(context.pool()).await?.into_any_base()?);
}
let len = pages.len();
let mut collection = OrderedCollection::new();
collection
.set_many_items(pages)
.set_context(activitystreams::context())
.set_id(community.get_outbox_url()?)
.set_total_items(len as u64);
Ok(create_apub_response(&collection))
}