133 lines
4.1 KiB
Rust
133 lines
4.1 KiB
Rust
use crate::{
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activity_lists::AnnouncableActivities,
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collections::CommunityContext,
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generate_outbox_url,
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objects::post::ApubPost,
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protocol::{
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activities::{
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community::announce::AnnounceActivity,
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create_or_update::page::CreateOrUpdatePage,
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CreateOrUpdateType,
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},
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collections::group_outbox::GroupOutbox,
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},
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};
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use activitypub_federation::{
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data::Data,
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traits::{ActivityHandler, ApubObject},
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utils::verify_domains_match,
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};
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use activitystreams_kinds::collection::OrderedCollectionType;
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use chrono::NaiveDateTime;
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use futures::future::join_all;
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use lemmy_db_schema::{
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source::{person::Person, post::Post},
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traits::Crud,
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};
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use lemmy_utils::error::LemmyError;
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use url::Url;
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#[derive(Clone, Debug)]
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pub(crate) struct ApubCommunityOutbox(Vec<ApubPost>);
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#[async_trait::async_trait(?Send)]
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impl ApubObject for ApubCommunityOutbox {
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type DataType = CommunityContext;
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type ApubType = GroupOutbox;
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type Error = LemmyError;
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fn last_refreshed_at(&self) -> Option<NaiveDateTime> {
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None
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}
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#[tracing::instrument(skip_all)]
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async fn read_from_apub_id(
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_object_id: Url,
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data: &Self::DataType,
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) -> Result<Option<Self>, LemmyError> {
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// Only read from database if its a local community, otherwise fetch over http
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if data.0.local {
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let community_id = data.0.id;
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let post_list: Vec<ApubPost> = Post::list_for_community(data.1.pool(), community_id)
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.await?
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.into_iter()
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.map(Into::into)
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.collect();
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Ok(Some(ApubCommunityOutbox(post_list)))
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} else {
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Ok(None)
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}
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}
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async fn delete(self, _data: &Self::DataType) -> Result<(), LemmyError> {
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// do nothing (it gets deleted automatically with the community)
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Ok(())
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}
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#[tracing::instrument(skip_all)]
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async fn into_apub(self, data: &Self::DataType) -> Result<Self::ApubType, LemmyError> {
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let mut ordered_items = vec![];
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for post in self.0 {
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let person = Person::read(data.1.pool(), post.creator_id).await?.into();
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let create =
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CreateOrUpdatePage::new(post, &person, &data.0, CreateOrUpdateType::Create, &data.1)
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.await?;
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let announcable = AnnouncableActivities::CreateOrUpdatePost(create);
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let announce = AnnounceActivity::new(announcable.try_into()?, &data.0, &data.1)?;
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ordered_items.push(announce);
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}
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Ok(GroupOutbox {
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r#type: OrderedCollectionType::OrderedCollection,
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id: generate_outbox_url(&data.0.actor_id)?.into(),
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total_items: ordered_items.len() as i32,
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ordered_items,
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})
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}
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#[tracing::instrument(skip_all)]
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async fn verify(
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group_outbox: &GroupOutbox,
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expected_domain: &Url,
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_context: &CommunityContext,
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_request_counter: &mut i32,
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) -> Result<(), LemmyError> {
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verify_domains_match(expected_domain, &group_outbox.id)?;
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Ok(())
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}
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#[tracing::instrument(skip_all)]
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async fn from_apub(
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apub: Self::ApubType,
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data: &Self::DataType,
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_request_counter: &mut i32,
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) -> Result<Self, LemmyError> {
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let mut outbox_activities = apub.ordered_items;
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if outbox_activities.len() > 20 {
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outbox_activities = outbox_activities[0..20].to_vec();
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}
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// We intentionally ignore errors here. This is because the outbox might contain posts from old
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// Lemmy versions, or from other software which we cant parse. In that case, we simply skip the
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// item and only parse the ones that work.
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let data = Data::new(data.1.clone());
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// process items in parallel, to avoid long delay from fetch_site_metadata() and other processing
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join_all(outbox_activities.into_iter().map(|activity| {
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async {
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// use separate request counter for each item, otherwise there will be problems with
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// parallel processing
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let request_counter = &mut 0;
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let verify = activity.verify(&data, request_counter).await;
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if verify.is_ok() {
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activity.receive(&data, request_counter).await.ok();
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}
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}
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}))
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.await;
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// This return value is unused, so just set an empty vec
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Ok(ApubCommunityOutbox(Vec::new()))
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}
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type DbType = ();
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}
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