lemmy/crates/apub/src/activities/voting/undo_vote.rs

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use crate::{
activities::{
community::announce::AnnouncableActivities,
generate_activity_id,
verify_activity,
verify_person_in_community,
voting::{
undo_vote_comment,
undo_vote_post,
vote::{Vote, VoteType},
},
},
activity_queue::send_to_community_new,
extensions::context::lemmy_context,
fetcher::object_id::ObjectId,
ActorType,
PostOrComment,
};
use activitystreams::{
activity::kind::UndoType,
base::AnyBase,
primitives::OneOrMany,
unparsed::Unparsed,
};
use lemmy_api_common::blocking;
use lemmy_apub_lib::{values::PublicUrl, verify_urls_match, ActivityFields, ActivityHandler};
use lemmy_db_queries::Crud;
use lemmy_db_schema::{
source::{community::Community, person::Person},
CommunityId,
};
use lemmy_utils::LemmyError;
use lemmy_websocket::LemmyContext;
use serde::{Deserialize, Serialize};
use std::ops::Deref;
use url::Url;
#[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
#[serde(rename_all = "camelCase")]
pub struct UndoVote {
actor: ObjectId<Person>,
to: [PublicUrl; 1],
object: Vote,
cc: [ObjectId<Community>; 1],
#[serde(rename = "type")]
kind: UndoType,
id: Url,
#[serde(rename = "@context")]
context: OneOrMany<AnyBase>,
#[serde(flatten)]
unparsed: Unparsed,
}
impl UndoVote {
pub async fn send(
object: &PostOrComment,
actor: &Person,
community_id: CommunityId,
kind: VoteType,
context: &LemmyContext,
) -> Result<(), LemmyError> {
let community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
let object = Vote::new(object, actor, &community, kind.clone(), context)?;
let id = generate_activity_id(
UndoType::Undo,
&context.settings().get_protocol_and_hostname(),
)?;
let undo_vote = UndoVote {
actor: ObjectId::new(actor.actor_id()),
to: [PublicUrl::Public],
object,
cc: [ObjectId::new(community.actor_id())],
kind: UndoType::Undo,
id: id.clone(),
context: lemmy_context(),
unparsed: Default::default(),
};
let activity = AnnouncableActivities::UndoVote(undo_vote);
send_to_community_new(activity, &id, actor, &community, vec![], context).await
}
}
#[async_trait::async_trait(?Send)]
impl ActivityHandler for UndoVote {
async fn verify(
&self,
context: &LemmyContext,
request_counter: &mut i32,
) -> Result<(), LemmyError> {
verify_activity(self, &context.settings())?;
verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
verify_urls_match(self.actor(), self.object.actor())?;
self.object.verify(context, request_counter).await?;
Ok(())
}
async fn receive(
self,
context: &LemmyContext,
request_counter: &mut i32,
) -> Result<(), LemmyError> {
let actor = self.actor.dereference(context, request_counter).await?;
let object = self
.object
.object
.dereference(context, request_counter)
.await?;
match object {
PostOrComment::Post(p) => undo_vote_post(actor, p.deref(), context).await,
PostOrComment::Comment(c) => undo_vote_comment(actor, c.deref(), context).await,
}
}
}