implement follow

server/src/api/community.rs

@@ -3,6 +3,7 @@ use crate::apub::{format_community_name, gen_keypair_str, make_apub_endpoint, En
 use diesel::PgConnection;
 use std::str::FromStr;
 use url::Url;
+use crate::apub::activities::follow_community;
 
 #[derive(Serialize, Deserialize)]
 pub struct GetCommunity {
@@ -401,6 +402,8 @@ impl Perform<CommunityResponse> for Oper<FollowCommunity> {
 
     let user_id = claims.id;
 
+    let community = Community::read(conn, data.community_id)?;
+    if community.local {
       let community_follower_form = CommunityFollowerForm {
         community_id: data.community_id,
         user_id,
@@ -417,6 +420,11 @@ impl Perform<CommunityResponse> for Oper<FollowCommunity> {
           Err(_e) => return Err(APIError::err("community_follower_already_exists").into()),
         };
       }
+    } else {
+      let user = User_::read(conn, user_id)?;
+      follow_community(&community, &user, conn)?;
+      // TODO: this needs to return a "pending" state, until Accept is received from the remote server
+    }
 
     let community_view = CommunityView::read(&conn, data.community_id, Some(user_id))?;
 

server/src/apub/activities.rs

@@ -3,7 +3,7 @@ use crate::db::community::Community;
 use crate::db::post::Post;
 use crate::db::user::User_;
 use crate::db::Crud;
-use activitystreams::activity::{Create, Update};
+use activitystreams::activity::{Create, Update, Follow, Accept};
 use activitystreams::object::properties::ObjectProperties;
 use activitystreams::{context, public};
 use diesel::PgConnection;
@@ -11,6 +11,7 @@ use failure::Error;
 use failure::_core::fmt::Debug;
 use isahc::prelude::*;
 use serde::Serialize;
+use activitystreams::BaseBox;
 
 fn populate_object_props(
   props: &mut ObjectProperties,
@@ -28,19 +29,13 @@ fn populate_object_props(
   Ok(())
 }
 
-fn send_activity<A>(activity: &A) -> Result<(), Error>
+fn send_activity<A>(activity: &A, to: Vec<String>) -> Result<(), Error>
 where
   A: Serialize + Debug,
 {
   let json = serde_json::to_string(&activity)?;
-  for i in get_following_instances() {
-    // TODO: need to send this to the inbox of following users
-    let inbox = format!(
-      "{}://{}/federation/inbox",
-      get_apub_protocol_string(),
-      i.domain
-    );
-    let res = Request::post(inbox)
+  for t in to {
+    let res = Request::post(t)
       .header("Content-Type", "application/json")
       .body(json.to_owned())?
       .send()?;
@@ -49,6 +44,15 @@ where
   Ok(())
 }
 
+fn get_followers(_community: &Community) -> Vec<String> {
+  // TODO: this is wrong, needs to go to the (non-local) followers of the community
+  get_following_instances().iter().map(|i| format!(
+    "{}://{}/federation/inbox",
+    get_apub_protocol_string(),
+    i.domain
+  )).collect()
+}
+
 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)?;
@@ -62,7 +66,7 @@ pub fn post_create(post: &Post, creator: &User_, conn: &PgConnection) -> Result<
     .create_props
     .set_actor_xsd_any_uri(creator.actor_id.to_owned())?
     .set_object_base_box(page)?;
-  send_activity(&create)?;
+  send_activity(&create, get_followers(&community))?;
   Ok(())
 }
 
@@ -79,6 +83,36 @@ pub fn post_update(post: &Post, creator: &User_, conn: &PgConnection) -> Result<
     .update_props
     .set_actor_xsd_any_uri(creator.actor_id.to_owned())?
     .set_object_base_box(page)?;
-  send_activity(&update)?;
+  send_activity(&update, get_followers(&community))?;
+  Ok(())
+}
+
+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())?;
+  println!("follow community: {:?}", &follow);
+  let to = format!("{}/inbox", community.actor_id);
+  println!("send follow to: {}", &to);
+  send_activity(&follow, vec!(to))?;
+  Ok(())
+}
+
+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())?)?;
+  println!("accept follow: {:?}", &accept);
+  let to = format!("{}/inbox", follow.follow_props.get_actor_xsd_any_uri().unwrap().to_string());
+  println!("send accept to: {}", &to);
+  send_activity(&follow, vec!(to))?;
   Ok(())
 }

server/src/apub/community.rs

@@ -64,7 +64,7 @@ impl Community {
       .set_id(self.actor_id.to_owned())?
       .set_name_xsd_string(self.name.to_owned())?
       .set_published(convert_datetime(self.published))?
-      .set_attributed_to_xsd_any_uri(make_apub_endpoint(EndpointType::User, &creator.name))?;
+      .set_attributed_to_xsd_any_uri(make_apub_endpoint(EndpointType::Community, &creator.name))?;
 
     if let Some(u) = self.updated.to_owned() {
       oprops.set_updated(convert_datetime(u))?;

server/src/apub/inbox.rs

@@ -1,16 +1,18 @@
 use crate::db::post::{Post, PostForm};
 use crate::db::Crud;
 use activitystreams::object::Page;
-use activitystreams::{
-  object::{Object, ObjectBox},
-  primitives::XsdAnyUri,
-  Base, BaseBox, PropRefs,
-};
+use activitystreams::{object::{Object, ObjectBox}, primitives::XsdAnyUri, Base, BaseBox, PropRefs};
 use actix_web::{web, HttpResponse};
 use diesel::r2d2::{ConnectionManager, Pool};
 use diesel::PgConnection;
 use failure::Error;
 use std::collections::HashMap;
+use crate::apub::fetcher::fetch_remote_user;
+use url::Url;
+use crate::db::community::{Community, CommunityFollower, CommunityFollowerForm};
+use crate::apub::activities::accept_follow;
+use crate::db::Followable;
+use activitystreams::activity::Follow;
 
 // TODO: need a proper actor that has this inbox
 
@@ -23,19 +25,27 @@ pub async fn inbox(
   match input.kind {
     ValidTypes::Create => handle_create(&input, conn),
     ValidTypes::Update => handle_update(&input, conn),
+    ValidTypes::Follow => handle_follow(&input, conn),
+    ValidTypes::Accept => handle_accept(&input, conn),
   }
 }
 
-fn handle_create(create: &AcceptedObjects, conn: &PgConnection) -> Result<HttpResponse, Error> {
-  let page = create.object.to_owned().to_concrete::<Page>()?;
+fn handle_create(input: &AcceptedObjects, conn: &PgConnection) -> Result<HttpResponse, Error> {
+  let page = match &input.object {
+    ValidObjects::Id(url) => return Err(format_err!("Invalid object for create activity: {}", url)),
+    ValidObjects::Object(obj) => obj.to_owned().to_concrete::<Page>()?,
+  };
   let post = PostForm::from_page(&page, conn)?;
   Post::create(conn, &post)?;
   // TODO: send the new post out via websocket
   Ok(HttpResponse::Ok().finish())
 }
 
-fn handle_update(update: &AcceptedObjects, conn: &PgConnection) -> Result<HttpResponse, Error> {
-  let page = update.object.to_owned().to_concrete::<Page>()?;
+fn handle_update(input: &AcceptedObjects, conn: &PgConnection) -> Result<HttpResponse, Error> {
+  let page = match &input.object {
+    ValidObjects::Id(url) => return Err(format_err!("Invalid object for update activity: {}", url)),
+    ValidObjects::Object(obj) => obj.to_owned().to_concrete::<Page>()?,
+  };
   let post = PostForm::from_page(&page, conn)?;
   let id = Post::read_from_apub_id(conn, &post.ap_id)?.id;
   Post::update(conn, id, &post)?;
@@ -43,6 +53,41 @@ fn handle_update(update: &AcceptedObjects, conn: &PgConnection) -> Result<HttpRe
   Ok(HttpResponse::Ok().finish())
 }
 
+fn handle_follow(input: &AcceptedObjects, conn: &PgConnection) -> Result<HttpResponse, Error> {
+  println!("received follow: {:?}", &input);
+  // TODO: we shouldnt have to rebuild the follow object from scratch
+  let mut follow = Follow::new();
+  follow.object_props
+      .set_id(input.id.to_owned())?;
+  follow.follow_props
+      .set_actor_xsd_any_uri(input.actor.clone())?;
+  match &input.object {
+    ValidObjects::Id(url) => {
+      follow.follow_props
+          .set_object_xsd_any_uri(url.clone())?;
+    },
+    ValidObjects::Object(obj) => return Err(format_err!("Invalid object for update activity: {:?}", obj)),
+  };
+
+  // TODO: make sure this is a local community
+  let community = Community::read_from_actor_id(conn, &follow.follow_props.get_object_xsd_any_uri().unwrap().to_string())?;
+  let user = fetch_remote_user(&Url::parse(&input.actor.to_string())?, conn)?;
+  // TODO: insert ID of the user into follows of the community
+  let community_follower_form = CommunityFollowerForm {
+    community_id: community.id,
+    user_id: user.id,
+  };
+  CommunityFollower::follow(&conn, &community_follower_form)?;
+  accept_follow(&follow)?;
+  Ok(HttpResponse::Ok().finish())
+}
+
+fn handle_accept(_input: &AcceptedObjects, _conn: &PgConnection) -> Result<HttpResponse, Error> {
+  println!("received accept: {:?}", &_input);
+  // TODO: at this point, indicate to the user that they are following the community
+  Ok(HttpResponse::Ok().finish())
+}
+
 #[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct AcceptedObjects {
@@ -53,7 +98,7 @@ pub struct AcceptedObjects {
 
   pub actor: XsdAnyUri,
 
-  pub object: BaseBox,
+  pub object: ValidObjects,
 
   #[serde(flatten)]
   ext: HashMap<String, serde_json::Value>,
@@ -64,6 +109,8 @@ pub struct AcceptedObjects {
 pub enum ValidTypes {
   Create,
   Update,
+  Follow,
+  Accept,
 }
 
 #[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
@@ -71,7 +118,7 @@ pub enum ValidTypes {
 #[serde(rename_all = "camelCase")]
 pub enum ValidObjects {
   Id(XsdAnyUri),
-  Object(AnyExistingObject),
+  Object(BaseBox),
 }
 
 #[derive(Clone, Debug, Default, serde::Deserialize, serde::Serialize, PropRefs)]

server/src/apub/post.rs

@@ -46,7 +46,7 @@ impl Post {
       .set_summary_xsd_string(self.name.to_owned())?
       .set_published(convert_datetime(self.published))?
       .set_to_xsd_any_uri(community.actor_id)?
-      .set_attributed_to_xsd_any_uri(make_apub_endpoint(EndpointType::User, &creator.name))?;
+      .set_attributed_to_xsd_any_uri(make_apub_endpoint(EndpointType::Post, &creator.name))?;
 
     if let Some(body) = &self.body {
       oprops.set_content_xsd_string(body.to_owned())?;

server/src/main.rs

@@ -39,8 +39,6 @@ async fn main() -> Result<(), Error> {
   // Set up websocket server
   let server = ChatServer::startup(pool.clone()).start();
 
-  // TODO: its probably failing because the other instance is not up yet
-  //       need to make a new thread and wait a bit before fetching
   thread::spawn(move || {
     // some work here
     sleep(Duration::from_secs(5));

server/src/routes/federation.rs

@@ -12,7 +12,8 @@ pub fn config(cfg: &mut web::ServiceConfig) {
       )
       // TODO: this needs to be moved to the actors (eg /federation/u/{}/inbox)
       .route("/federation/inbox", web::post().to(apub::inbox::inbox))
-      .route("/federation/inbox", web::post().to(apub::inbox::inbox))
+        .route("/federation/c/{community_name}/inbox", web::post().to(apub::inbox::inbox))
+        .route("/federation/u/{user_name}/inbox", web::post().to(apub::inbox::inbox))
       .route(
         "/federation/c/{community_name}",
         web::get().to(apub::community::get_apub_community_http),