crates/apub/src/activities/community/announce.rs

   1 use crate::{
   2   activities::{generate_activity_id, send_lemmy_activity, verify_activity, verify_is_public},
   3   activity_lists::AnnouncableActivities,
   4   http::ActivityCommonFields,
   5   insert_activity,
   6   objects::community::ApubCommunity,
   7   protocol::activities::{community::announce::AnnounceActivity, CreateOrUpdateType},
   8 };
   9 use activitystreams_kinds::{activity::AnnounceType, public};
  10 use lemmy_apub_lib::{
  11   data::Data,
  12   object_id::ObjectId,
  13   traits::{ActivityHandler, ActorType},
  14 };
  15 use lemmy_utils::LemmyError;
  16 use lemmy_websocket::LemmyContext;
  17
  18 #[async_trait::async_trait(?Send)]
  19 pub(crate) trait GetCommunity {
  20   async fn get_community(
  21     &self,
  22     context: &LemmyContext,
  23     request_counter: &mut i32,
  24   ) -> Result<ApubCommunity, LemmyError>;
  25 }
  26
  27 impl AnnounceActivity {
  28   pub(crate) fn new(
  29     object: AnnouncableActivities,
  30     community: &ApubCommunity,
  31     context: &LemmyContext,
  32   ) -> Result<AnnounceActivity, LemmyError> {
  33     Ok(AnnounceActivity {
  34       actor: ObjectId::new(community.actor_id()),
  35       to: vec![public()],
  36       object,
  37       cc: vec![community.followers_url.clone().into()],
  38       kind: AnnounceType::Announce,
  39       id: generate_activity_id(
  40         &AnnounceType::Announce,
  41         &context.settings().get_protocol_and_hostname(),
  42       )?,
  43       unparsed: Default::default(),
  44     })
  45   }
  46
  47   #[tracing::instrument(skip_all)]
  48   pub async fn send(
  49     object: AnnouncableActivities,
  50     community: &ApubCommunity,
  51     context: &LemmyContext,
  52   ) -> Result<(), LemmyError> {
  53     let announce = AnnounceActivity::new(object.clone(), community, context)?;
  54     let inboxes = community.get_follower_inboxes(context).await?;
  55     send_lemmy_activity(
  56       context,
  57       &announce,
  58       &announce.id,
  59       community,
  60       inboxes.clone(),
  61       false,
  62     )
  63     .await?;
  64
  65     // Pleroma and Mastodon can't handle activities like Announce/Create/Page. So for
  66     // compatibility, we also send Announce/Page so that they can follow Lemmy communities.
  67     use AnnouncableActivities::*;
  68     let object = match object {
  69       CreateOrUpdatePost(c) if c.kind == CreateOrUpdateType::Create => Page(c.object),
  70       _ => return Ok(()),
  71     };
  72     let announce_compat = AnnounceActivity::new(object, community, context)?;
  73     send_lemmy_activity(
  74       context,
  75       &announce_compat,
  76       &announce_compat.id,
  77       community,
  78       inboxes,
  79       false,
  80     )
  81     .await?;
  82     Ok(())
  83   }
  84 }
  85
  86 #[async_trait::async_trait(?Send)]
  87 impl ActivityHandler for AnnounceActivity {
  88   type DataType = LemmyContext;
  89
  90   #[tracing::instrument(skip_all)]
  91   async fn verify(
  92     &self,
  93     context: &Data<LemmyContext>,
  94     request_counter: &mut i32,
  95   ) -> Result<(), LemmyError> {
  96     verify_is_public(&self.to, &self.cc)?;
  97     verify_activity(&self.id, self.actor.inner(), &context.settings())?;
  98     self.object.verify(context, request_counter).await?;
  99     Ok(())
 100   }
 101
 102   #[tracing::instrument(skip_all)]
 103   async fn receive(
 104     self,
 105     context: &Data<LemmyContext>,
 106     request_counter: &mut i32,
 107   ) -> Result<(), LemmyError> {
 108     // TODO: this can probably be implemented in a cleaner way
 109     match self.object {
 110       // Dont insert these into activities table, as they are not activities.
 111       AnnouncableActivities::Page(_) => {}
 112       _ => {
 113         let object_value = serde_json::to_value(&self.object)?;
 114         let object_data: ActivityCommonFields = serde_json::from_value(object_value.to_owned())?;
 115
 116         insert_activity(&object_data.id, object_value, false, true, context.pool()).await?;
 117       }
 118     }
 119     self.object.receive(context, request_counter).await
 120   }
 121 }