use crate::apub::is_apub_id_valid; use crate::db::community::Community; use crate::db::community_view::CommunityFollowerView; use crate::db::post::Post; use crate::db::user::User_; use crate::db::Crud; use activitystreams::activity::{Accept, Create, Follow, Update}; use activitystreams::object::properties::ObjectProperties; use activitystreams::BaseBox; use activitystreams::{context, public}; use diesel::PgConnection; use failure::Error; use failure::_core::fmt::Debug; use isahc::prelude::*; use log::debug; use serde::Serialize; fn populate_object_props( props: &mut ObjectProperties, addressed_to: &str, object_id: &str, ) -> Result<(), Error> { props .set_context_xsd_any_uri(context())? // TODO: the activity needs a seperate id from the object .set_id(object_id)? // TODO: should to/cc go on the Create, or on the Post? or on both? // TODO: handle privacy on the receiving side (at least ignore anything thats not public) .set_to_xsd_any_uri(public())? .set_cc_xsd_any_uri(addressed_to)?; Ok(()) } /// Send an activity to a list of recipients, using the correct headers etc. fn send_activity(activity: &A, to: Vec) -> Result<(), Error> where A: Serialize + Debug, { let json = serde_json::to_string(&activity)?; debug!("Sending activitypub activity {} to {:?}", json, to); for t in to { if is_apub_id_valid(&t) { debug!("Not sending activity to {} (invalid or blacklisted)", t); continue; } let res = Request::post(t) .header("Content-Type", "application/json") .body(json.to_owned())? .send()?; debug!("Result for activity send: {:?}", res); } Ok(()) } /// For a given community, returns the inboxes of all followers. fn get_follower_inboxes(conn: &PgConnection, community: &Community) -> Result, Error> { Ok( CommunityFollowerView::for_community(conn, community.id)? .iter() .filter(|c| !c.user_local) .map(|c| format!("{}/inbox", c.user_actor_id.to_owned())) .collect(), ) } /// Send out information about a newly created post, to the followers of the community. pub fn post_create(post: &Post, creator: &User_, conn: &PgConnection) -> Result<(), Error> { let page = post.as_page(conn)?; let community = Community::read(conn, post.community_id)?; let mut create = Create::new(); populate_object_props( &mut create.object_props, &community.get_followers_url(), &post.ap_id, )?; create .create_props .set_actor_xsd_any_uri(creator.actor_id.to_owned())? .set_object_base_box(page)?; send_activity(&create, get_follower_inboxes(conn, &community)?)?; Ok(()) } /// Send out information about an edited post, to the followers of the community. pub fn post_update(post: &Post, creator: &User_, conn: &PgConnection) -> Result<(), Error> { let page = post.as_page(conn)?; let community = Community::read(conn, post.community_id)?; let mut update = Update::new(); populate_object_props( &mut update.object_props, &community.get_followers_url(), &post.ap_id, )?; update .update_props .set_actor_xsd_any_uri(creator.actor_id.to_owned())? .set_object_base_box(page)?; send_activity(&update, get_follower_inboxes(conn, &community)?)?; Ok(()) } /// As a given local user, send out a follow request to a remote community. pub fn follow_community( community: &Community, user: &User_, _conn: &PgConnection, ) -> Result<(), Error> { let mut follow = Follow::new(); follow .object_props .set_context_xsd_any_uri(context())? // TODO: needs proper id .set_id(user.actor_id.clone())?; follow .follow_props .set_actor_xsd_any_uri(user.actor_id.clone())? .set_object_xsd_any_uri(community.actor_id.clone())?; let to = format!("{}/inbox", community.actor_id); send_activity(&follow, vec![to])?; Ok(()) } /// As a local community, accept the follow request from a remote user. pub fn accept_follow(follow: &Follow) -> Result<(), Error> { let mut accept = Accept::new(); accept .object_props .set_context_xsd_any_uri(context())? // TODO: needs proper id .set_id( follow .follow_props .get_actor_xsd_any_uri() .unwrap() .to_string(), )?; accept .accept_props .set_object_base_box(BaseBox::from_concrete(follow.clone())?)?; let to = format!( "{}/inbox", follow .follow_props .get_actor_xsd_any_uri() .unwrap() .to_string() ); send_activity(&accept, vec![to])?; Ok(()) }