255 lines
7.6 KiB
Rust
255 lines
7.6 KiB
Rust
use crate::{
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ap_url, db_conn::DbConn, notifications::*, schema::follows, users::User, Connection, Error,
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Result, CONFIG,
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};
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use activitypub::activity::{Accept, Follow as FollowAct, Undo};
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use diesel::{self, ExpressionMethods, QueryDsl, RunQueryDsl, SaveChangesDsl};
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use plume_common::activity_pub::{
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broadcast,
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inbox::{AsActor, AsObject, FromId},
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sign::Signer,
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Id, IntoId, PUBLIC_VISIBILITY,
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};
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#[derive(Clone, Queryable, Identifiable, Associations, AsChangeset)]
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#[belongs_to(User, foreign_key = "following_id")]
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pub struct Follow {
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pub id: i32,
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pub follower_id: i32,
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pub following_id: i32,
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pub ap_url: String,
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}
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#[derive(Insertable)]
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#[table_name = "follows"]
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pub struct NewFollow {
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pub follower_id: i32,
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pub following_id: i32,
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pub ap_url: String,
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}
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impl Follow {
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insert!(
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follows,
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NewFollow,
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|inserted, conn| if inserted.ap_url.is_empty() {
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inserted.ap_url = ap_url(&format!("{}/follows/{}", CONFIG.base_url, inserted.id));
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inserted.save_changes(conn).map_err(Error::from)
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} else {
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Ok(inserted)
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}
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);
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get!(follows);
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find_by!(follows, find_by_ap_url, ap_url as &str);
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pub fn find(conn: &Connection, from: i32, to: i32) -> Result<Follow> {
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follows::table
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.filter(follows::follower_id.eq(from))
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.filter(follows::following_id.eq(to))
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.get_result(conn)
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.map_err(Error::from)
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}
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pub fn to_activity(&self, conn: &Connection) -> Result<FollowAct> {
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let user = User::get(conn, self.follower_id)?;
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let target = User::get(conn, self.following_id)?;
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let mut act = FollowAct::default();
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act.follow_props.set_actor_link::<Id>(user.into_id())?;
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act.follow_props
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.set_object_link::<Id>(target.clone().into_id())?;
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act.object_props.set_id_string(self.ap_url.clone())?;
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act.object_props.set_to_link_vec(vec![target.into_id()])?;
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act.object_props
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.set_cc_link_vec(vec![Id::new(PUBLIC_VISIBILITY.to_string())])?;
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Ok(act)
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}
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pub fn notify(&self, conn: &Connection) -> Result<()> {
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if User::get(conn, self.following_id)?.is_local() {
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Notification::insert(
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conn,
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NewNotification {
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kind: notification_kind::FOLLOW.to_string(),
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object_id: self.id,
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user_id: self.following_id,
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},
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)?;
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}
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Ok(())
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}
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/// from -> The one sending the follow request
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/// target -> The target of the request, responding with Accept
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pub fn accept_follow<A: Signer + IntoId + Clone, B: Clone + AsActor<T> + IntoId, T>(
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conn: &Connection,
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from: &B,
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target: &A,
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follow: FollowAct,
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from_id: i32,
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target_id: i32,
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) -> Result<Follow> {
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let res = Follow::insert(
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conn,
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NewFollow {
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follower_id: from_id,
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following_id: target_id,
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ap_url: follow.object_props.id_string()?,
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},
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)?;
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res.notify(conn)?;
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let mut accept = Accept::default();
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let accept_id = ap_url(&format!(
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"{}/follow/{}/accept",
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CONFIG.base_url.as_str(),
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&res.id
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));
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accept.object_props.set_id_string(accept_id)?;
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accept
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.object_props
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.set_to_link_vec(vec![from.clone().into_id()])?;
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accept
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.object_props
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.set_cc_link_vec(vec![Id::new(PUBLIC_VISIBILITY.to_string())])?;
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accept
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.accept_props
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.set_actor_link::<Id>(target.clone().into_id())?;
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accept.accept_props.set_object_object(follow)?;
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broadcast(
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&*target,
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accept,
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vec![from.clone()],
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CONFIG.proxy().cloned(),
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);
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Ok(res)
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}
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pub fn build_undo(&self, conn: &Connection) -> Result<Undo> {
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let mut undo = Undo::default();
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undo.undo_props
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.set_actor_link(User::get(conn, self.follower_id)?.into_id())?;
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undo.object_props
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.set_id_string(format!("{}/undo", self.ap_url))?;
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undo.undo_props
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.set_object_link::<Id>(self.clone().into_id())?;
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undo.object_props
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.set_to_link_vec(vec![User::get(conn, self.following_id)?.into_id()])?;
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undo.object_props
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.set_cc_link_vec(vec![Id::new(PUBLIC_VISIBILITY.to_string())])?;
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Ok(undo)
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}
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}
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impl AsObject<User, FollowAct, &DbConn> for User {
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type Error = Error;
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type Output = Follow;
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fn activity(self, conn: &DbConn, actor: User, id: &str) -> Result<Follow> {
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// Mastodon (at least) requires the full Follow object when accepting it,
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// so we rebuilt it here
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let mut follow = FollowAct::default();
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follow.object_props.set_id_string(id.to_string())?;
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follow
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.follow_props
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.set_actor_link::<Id>(actor.clone().into_id())?;
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Follow::accept_follow(conn, &actor, &self, follow, actor.id, self.id)
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}
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}
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impl FromId<DbConn> for Follow {
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type Error = Error;
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type Object = FollowAct;
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fn from_db(conn: &DbConn, id: &str) -> Result<Self> {
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Follow::find_by_ap_url(conn, id)
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}
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fn from_activity(conn: &DbConn, follow: FollowAct) -> Result<Self> {
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let actor = User::from_id(
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conn,
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&follow.follow_props.actor_link::<Id>()?,
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None,
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CONFIG.proxy(),
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)
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.map_err(|(_, e)| e)?;
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let target = User::from_id(
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conn,
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&follow.follow_props.object_link::<Id>()?,
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None,
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CONFIG.proxy(),
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)
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.map_err(|(_, e)| e)?;
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Follow::accept_follow(conn, &actor, &target, follow, actor.id, target.id)
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}
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}
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impl AsObject<User, Undo, &DbConn> for Follow {
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type Error = Error;
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type Output = ();
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fn activity(self, conn: &DbConn, actor: User, _id: &str) -> Result<()> {
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let conn = conn;
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if self.follower_id == actor.id {
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diesel::delete(&self).execute(&**conn)?;
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// delete associated notification if any
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if let Ok(notif) = Notification::find(&conn, notification_kind::FOLLOW, self.id) {
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diesel::delete(¬if).execute(&**conn)?;
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}
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Ok(())
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} else {
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Err(Error::Unauthorized)
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}
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}
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}
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impl IntoId for Follow {
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fn into_id(self) -> Id {
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Id::new(self.ap_url)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::{tests::db, users::tests as user_tests};
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use diesel::Connection;
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#[test]
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fn test_id() {
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let conn = db();
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conn.test_transaction::<_, (), _>(|| {
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let users = user_tests::fill_database(&conn);
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let follow = Follow::insert(
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&conn,
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NewFollow {
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follower_id: users[0].id,
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following_id: users[1].id,
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ap_url: String::new(),
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},
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)
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.expect("Couldn't insert new follow");
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assert_eq!(
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follow.ap_url,
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format!("https://{}/follows/{}", CONFIG.base_url, follow.id)
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);
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let follow = Follow::insert(
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&conn,
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NewFollow {
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follower_id: users[1].id,
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following_id: users[0].id,
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ap_url: String::from("https://some.url/"),
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},
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)
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.expect("Couldn't insert new follow");
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assert_eq!(follow.ap_url, String::from("https://some.url/"));
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Ok(())
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})
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}
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}
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