lemmy/crates/api/src/community/follow.rs

100 lines
3.4 KiB
Rust

use crate::Perform;
use actix_web::web::Data;
use lemmy_api_common::{
community::{CommunityResponse, FollowCommunity},
utils::{
blocking,
check_community_ban,
check_community_deleted_or_removed,
get_local_user_view_from_jwt,
},
};
use lemmy_apub::{
objects::community::ApubCommunity,
protocol::activities::following::{
follow::FollowCommunity as FollowCommunityApub,
undo_follow::UndoFollowCommunity,
},
};
use lemmy_db_schema::{
source::community::{Community, CommunityFollower, CommunityFollowerForm},
traits::{Crud, Followable},
};
use lemmy_db_views_actor::structs::CommunityView;
use lemmy_utils::{ConnectionId, LemmyError};
use lemmy_websocket::LemmyContext;
#[async_trait::async_trait(?Send)]
impl Perform for FollowCommunity {
type Response = CommunityResponse;
#[tracing::instrument(skip(context, _websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<CommunityResponse, LemmyError> {
let data: &FollowCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
let community_id = data.community_id;
let community: ApubCommunity = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??
.into();
let community_follower_form = CommunityFollowerForm {
community_id: data.community_id,
person_id: local_user_view.person.id,
pending: false,
};
if community.local {
if data.follow {
check_community_ban(local_user_view.person.id, community_id, context.pool()).await?;
check_community_deleted_or_removed(community_id, context.pool()).await?;
let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
blocking(context.pool(), follow)
.await?
.map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
} else {
let unfollow =
move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
blocking(context.pool(), unfollow)
.await?
.map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
}
} else if data.follow {
// Dont actually add to the community followers here, because you need
// to wait for the accept
FollowCommunityApub::send(&local_user_view.person.clone().into(), &community, context)
.await?;
} else {
UndoFollowCommunity::send(&local_user_view.person.clone().into(), &community, context)
.await?;
let unfollow = move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
blocking(context.pool(), unfollow)
.await?
.map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
}
let community_id = data.community_id;
let person_id = local_user_view.person.id;
let mut community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(person_id))
})
.await??;
// TODO: this needs to return a "pending" state, until Accept is received from the remote server
// For now, just assume that remote follows are accepted.
// Otherwise, the subscribed will be null
if !community.local {
community_view.subscribed = data.follow;
}
Ok(CommunityResponse { community_view })
}
}