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use crate::{
apub::{
extensions::signatures::verify,
fetcher::{get_or_fetch_and_upsert_remote_community, get_or_fetch_and_upsert_remote_user},
ActorType,
},
db::{
activity::insert_activity,
community::{Community, CommunityFollower, CommunityFollowerForm},
user::User_,
Followable,
},
routes::{ChatServerParam, DbPoolParam},
};
use activitystreams::activity::Undo;
use activitystreams_new::activity::Follow;
use actix_web::{web, HttpRequest, HttpResponse, Result};
use diesel::PgConnection;
use failure::{Error, _core::fmt::Debug};
use log::debug;
use serde::Deserialize;
#[serde(untagged)]
#[derive(Deserialize, Debug)]
pub enum CommunityAcceptedObjects {
Follow(Follow),
Undo(Undo),
}
impl CommunityAcceptedObjects {
fn follow(&self) -> Result<Follow, Error> {
match self {
CommunityAcceptedObjects::Follow(f) => Ok(f.to_owned()),
CommunityAcceptedObjects::Undo(u) => Ok(
u.undo_props
.get_object_base_box()
.to_owned()
.unwrap()
.to_owned()
.into_concrete::<Follow>()?,
),
}
}
}
/// Handler for all incoming activities to community inboxes.
pub async fn community_inbox(
request: HttpRequest,
input: web::Json<CommunityAcceptedObjects>,
path: web::Path<String>,
db: DbPoolParam,
_chat_server: ChatServerParam,
) -> Result<HttpResponse, Error> {
let input = input.into_inner();
let conn = db.get()?;
let community = Community::read_from_name(&conn, &path.into_inner())?;
if !community.local {
return Err(format_err!(
"Received activity is addressed to remote community {}",
&community.actor_id
));
}
debug!(
"Community {} received activity {:?}",
&community.name, &input
);
let follow = input.follow()?;
let user_uri = follow.actor.as_single_xsd_any_uri().unwrap().to_string();
let community_uri = follow.object.as_single_xsd_any_uri().unwrap().to_string();
let conn = db.get()?;
let user = get_or_fetch_and_upsert_remote_user(&user_uri, &conn)?;
let community = get_or_fetch_and_upsert_remote_community(&community_uri, &conn)?;
verify(&request, &user)?;
match input {
CommunityAcceptedObjects::Follow(f) => handle_follow(&f, &user, &community, &conn),
CommunityAcceptedObjects::Undo(u) => handle_undo_follow(&u, &user, &community, &conn),
}
}
/// Handle a follow request from a remote user, adding it to the local database and returning an
/// Accept activity.
fn handle_follow(
follow: &Follow,
user: &User_,
community: &Community,
conn: &PgConnection,
) -> Result<HttpResponse, Error> {
insert_activity(&conn, user.id, &follow, false)?;
let community_follower_form = CommunityFollowerForm {
community_id: community.id,
user_id: user.id,
};
// This will fail if they're already a follower, but ignore the error.
CommunityFollower::follow(&conn, &community_follower_form).ok();
community.send_accept_follow(&follow, &conn)?;
Ok(HttpResponse::Ok().finish())
}
fn handle_undo_follow(
undo: &Undo,
user: &User_,
community: &Community,
conn: &PgConnection,
) -> Result<HttpResponse, Error> {
insert_activity(&conn, user.id, &undo, false)?;
let community_follower_form = CommunityFollowerForm {
community_id: community.id,
user_id: user.id,
};
CommunityFollower::unfollow(&conn, &community_follower_form).ok();
Ok(HttpResponse::Ok().finish())
}