use crate::{ apub::{ activities::{generate_activity_id, send_activity}, create_apub_response, create_apub_tombstone_response, create_tombstone, extensions::group_extensions::GroupExtension, fetcher::get_or_fetch_and_upsert_remote_user, get_shared_inbox, insert_activity, ActorType, FromApub, GroupExt, ToApub, }, blocking, routes::DbPoolParam, DbPool, LemmyError, }; use activitystreams_ext::Ext2; use activitystreams_new::{ activity::{ kind::{AcceptType, AnnounceType, DeleteType, LikeType, RemoveType, UndoType}, Accept, Announce, Delete, Follow, Remove, Undo, }, actor::{kind::GroupType, ApActor, Endpoints, Group}, base::{AnyBase, BaseExt}, collection::UnorderedCollection, context, object::Tombstone, prelude::*, public, }; use actix_web::{body::Body, client::Client, web, HttpResponse}; use itertools::Itertools; use lemmy_db::{ community::{Community, CommunityForm}, community_view::{CommunityFollowerView, CommunityModeratorView}, naive_now, user::User_, }; use lemmy_utils::convert_datetime; use serde::Deserialize; use url::Url; #[derive(Deserialize)] pub struct CommunityQuery { community_name: String, } #[async_trait::async_trait(?Send)] impl ToApub for Community { type Response = GroupExt; // Turn a Lemmy Community into an ActivityPub group that can be sent out over the network. async fn to_apub(&self, pool: &DbPool) -> Result { // The attributed to, is an ordered vector with the creator actor_ids first, // then the rest of the moderators // TODO Technically the instance admins can mod the community, but lets // ignore that for now let id = self.id; let moderators = blocking(pool, move |conn| { CommunityModeratorView::for_community(&conn, id) }) .await??; let moderators: Vec = moderators.into_iter().map(|m| m.user_actor_id).collect(); let mut group = Group::new(); group .set_context(context()) .set_id(Url::parse(&self.actor_id)?) .set_name(self.name.to_owned()) .set_published(convert_datetime(self.published)) .set_many_attributed_tos(moderators); if let Some(u) = self.updated.to_owned() { group.set_updated(convert_datetime(u)); } if let Some(d) = self.description.to_owned() { // TODO: this should be html, also add source field with raw markdown // -> same for post.content and others group.set_content(d); } let mut ap_actor = ApActor::new(self.get_inbox_url().parse()?, group); ap_actor .set_preferred_username(self.title.to_owned()) .set_outbox(self.get_outbox_url().parse()?) .set_followers(self.get_followers_url().parse()?) .set_following(self.get_following_url().parse()?) .set_liked(self.get_liked_url().parse()?) .set_endpoints(Endpoints { shared_inbox: Some(self.get_shared_inbox_url().parse()?), ..Default::default() }); let nsfw = self.nsfw; let category_id = self.category_id; let group_extension = blocking(pool, move |conn| { GroupExtension::new(conn, category_id, nsfw) }) .await??; Ok(Ext2::new( ap_actor, group_extension, self.get_public_key_ext(), )) } fn to_tombstone(&self) -> Result { create_tombstone(self.deleted, &self.actor_id, self.updated, GroupType::Group) } } #[async_trait::async_trait(?Send)] impl ActorType for Community { fn actor_id_str(&self) -> String { self.actor_id.to_owned() } fn public_key(&self) -> String { self.public_key.to_owned().unwrap() } fn private_key(&self) -> String { self.private_key.to_owned().unwrap() } /// As a local community, accept the follow request from a remote user. async fn send_accept_follow( &self, follow: Follow, client: &Client, pool: &DbPool, ) -> Result<(), LemmyError> { let actor_uri = follow.actor()?.as_single_xsd_any_uri().unwrap().to_string(); let mut accept = Accept::new(self.actor_id.to_owned(), follow.into_any_base()?); let to = format!("{}/inbox", actor_uri); accept .set_context(context()) .set_id(generate_activity_id(AcceptType::Accept)?) .set_to(to.clone()); insert_activity(self.creator_id, accept.clone(), true, pool).await?; send_activity(client, &accept.into_any_base()?, self, vec![to]).await?; Ok(()) } async fn send_delete( &self, creator: &User_, client: &Client, pool: &DbPool, ) -> Result<(), LemmyError> { let group = self.to_apub(pool).await?; let mut delete = Delete::new(creator.actor_id.to_owned(), group.into_any_base()?); delete .set_context(context()) .set_id(generate_activity_id(DeleteType::Delete)?) .set_to(public()) .set_many_ccs(vec![self.get_followers_url()]); insert_activity(self.creator_id, delete.clone(), true, pool).await?; let inboxes = self.get_follower_inboxes(pool).await?; // Note: For an accept, since it was automatic, no one pushed a button, // the community was the actor. // But for delete, the creator is the actor, and does the signing send_activity(client, &delete.into_any_base()?, creator, inboxes).await?; Ok(()) } async fn send_undo_delete( &self, creator: &User_, client: &Client, pool: &DbPool, ) -> Result<(), LemmyError> { let group = self.to_apub(pool).await?; let mut delete = Delete::new(creator.actor_id.to_owned(), group.into_any_base()?); delete .set_context(context()) .set_id(generate_activity_id(DeleteType::Delete)?) .set_to(public()) .set_many_ccs(vec![self.get_followers_url()]); // TODO // Undo that fake activity let mut undo = Undo::new(creator.actor_id.to_owned(), delete.into_any_base()?); undo .set_context(context()) .set_id(generate_activity_id(UndoType::Undo)?) .set_to(public()) .set_many_ccs(vec![self.get_followers_url()]); insert_activity(self.creator_id, undo.clone(), true, pool).await?; let inboxes = self.get_follower_inboxes(pool).await?; // Note: For an accept, since it was automatic, no one pushed a button, // the community was the actor. // But for delete, the creator is the actor, and does the signing send_activity(client, &undo.into_any_base()?, creator, inboxes).await?; Ok(()) } async fn send_remove( &self, mod_: &User_, client: &Client, pool: &DbPool, ) -> Result<(), LemmyError> { let group = self.to_apub(pool).await?; let mut remove = Remove::new(mod_.actor_id.to_owned(), group.into_any_base()?); remove .set_context(context()) .set_id(generate_activity_id(RemoveType::Remove)?) .set_to(public()) .set_many_ccs(vec![self.get_followers_url()]); insert_activity(mod_.id, remove.clone(), true, pool).await?; let inboxes = self.get_follower_inboxes(pool).await?; // Note: For an accept, since it was automatic, no one pushed a button, // the community was the actor. // But for delete, the creator is the actor, and does the signing send_activity(client, &remove.into_any_base()?, mod_, inboxes).await?; Ok(()) } async fn send_undo_remove( &self, mod_: &User_, client: &Client, pool: &DbPool, ) -> Result<(), LemmyError> { let group = self.to_apub(pool).await?; let mut remove = Remove::new(mod_.actor_id.to_owned(), group.into_any_base()?); remove .set_context(context()) .set_id(generate_activity_id(RemoveType::Remove)?) .set_to(public()) .set_many_ccs(vec![self.get_followers_url()]); // Undo that fake activity let mut undo = Undo::new(mod_.actor_id.to_owned(), remove.into_any_base()?); undo .set_context(context()) .set_id(generate_activity_id(LikeType::Like)?) .set_to(public()) .set_many_ccs(vec![self.get_followers_url()]); insert_activity(mod_.id, undo.clone(), true, pool).await?; let inboxes = self.get_follower_inboxes(pool).await?; // Note: For an accept, since it was automatic, no one pushed a button, // the community was the actor. // But for remove , the creator is the actor, and does the signing send_activity(client, &undo.into_any_base()?, mod_, inboxes).await?; Ok(()) } /// For a given community, returns the inboxes of all followers. async fn get_follower_inboxes(&self, pool: &DbPool) -> Result, LemmyError> { let id = self.id; let inboxes = blocking(pool, move |conn| { CommunityFollowerView::for_community(conn, id) }) .await??; let inboxes = inboxes .into_iter() .map(|c| get_shared_inbox(&Url::parse(&c.user_actor_id).unwrap())) .filter(|s| !s.is_empty()) .unique() .collect(); Ok(inboxes) } async fn send_follow( &self, _follow_actor_id: &str, _client: &Client, _pool: &DbPool, ) -> Result<(), LemmyError> { unimplemented!() } async fn send_unfollow( &self, _follow_actor_id: &str, _client: &Client, _pool: &DbPool, ) -> Result<(), LemmyError> { unimplemented!() } fn user_id(&self) -> i32 { self.creator_id } } #[async_trait::async_trait(?Send)] impl FromApub for CommunityForm { type ApubType = GroupExt; /// Parse an ActivityPub group received from another instance into a Lemmy community. async fn from_apub( group: &GroupExt, client: &Client, pool: &DbPool, actor_id: &Url, ) -> Result { let creator_and_moderator_uris = group.inner.attributed_to().unwrap(); let creator_uri = creator_and_moderator_uris .as_many() .unwrap() .iter() .next() .unwrap() .as_xsd_any_uri() .unwrap(); let creator = get_or_fetch_and_upsert_remote_user(creator_uri, client, pool).await?; Ok(CommunityForm { name: group .inner .name() .unwrap() .as_one() .unwrap() .as_xsd_string() .unwrap() .into(), title: group.inner.preferred_username().unwrap().to_string(), // TODO: should be parsed as html and tags like