Send Announce/Page, Announce/Note for Pleroma compatibility

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

@@ -26,13 +26,12 @@ pub(crate) trait GetCommunity {
 }
 
 impl AnnounceActivity {
-  pub async fn send(
+  fn new(
     object: AnnouncableActivities,
     community: &ApubCommunity,
-    additional_inboxes: Vec<Url>,
     context: &LemmyContext,
-  ) -> Result<(), LemmyError> {
-    let announce = AnnounceActivity {
+  ) -> Result<AnnounceActivity, LemmyError> {
+    Ok(AnnounceActivity {
       actor: ObjectId::new(community.actor_id()),
       to: vec![public()],
       object,
@@ -43,11 +42,49 @@ impl AnnounceActivity {
         &context.settings().get_protocol_and_hostname(),
       )?,
       unparsed: Default::default(),
-    };
+    })
+  }
+
+  pub async fn send(
+    object: AnnouncableActivities,
+    community: &ApubCommunity,
+    additional_inboxes: Vec<Url>,
+    context: &LemmyContext,
+  ) -> Result<(), LemmyError> {
+    let announce = AnnounceActivity::new(object.clone(), community, context)?;
     let inboxes = community
-      .get_follower_inboxes(additional_inboxes, context)
+      .get_follower_inboxes(additional_inboxes.clone(), context)
       .await?;
-    send_lemmy_activity(context, &announce, &announce.id, community, inboxes, false).await
+    send_lemmy_activity(
+      context,
+      &announce,
+      &announce.id,
+      community,
+      inboxes.clone(),
+      false,
+    )
+    .await?;
+
+    // Pleroma (and likely Mastodon) can't handle activities like Announce/Create/Page, so for
+    // compatibility, we also send Announce/Page and Announce/Note (for new and updated
+    // posts/comments).
+    use AnnouncableActivities::*;
+    let object = match object {
+      CreateOrUpdatePost(c) => Page(c.object),
+      CreateOrUpdateComment(c) => Note(c.object),
+      _ => return Ok(()),
+    };
+    let announce_compat = AnnounceActivity::new(object, community, context)?;
+    send_lemmy_activity(
+      context,
+      &announce_compat,
+      &announce_compat.id,
+      community,
+      inboxes,
+      false,
+    )
+    .await?;
+    Ok(())
   }
 }
 
@@ -77,14 +114,7 @@ impl ActivityHandler for AnnounceActivity {
     if is_activity_already_known(context.pool(), &object_data.id).await? {
       return Ok(());
     }
-    insert_activity(
-      &object_data.id,
-      self.object.clone(),
-      false,
-      true,
-      context.pool(),
-    )
-    .await?;
+    insert_activity(&object_data.id, &self.object, false, true, context.pool()).await?;
     self.object.receive(context, request_counter).await
   }
 }

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

@@ -28,7 +28,7 @@ pub(crate) async fn send_to_community<T: ActorType>(
 ) -> Result<(), LemmyError> {
   // if this is a local community, we need to do an announce from the community instead
   if community.local {
-    insert_activity(activity_id, activity.clone(), true, false, context.pool()).await?;
+    insert_activity(activity_id, &activity, true, false, context.pool()).await?;
     AnnounceActivity::send(activity, community, additional_inboxes, context).await?;
   } else {
     let mut inboxes = additional_inboxes;

crates/apub/src/activities/mod.rs

@@ -173,7 +173,7 @@ async fn send_lemmy_activity<T: Serialize>(
 
   insert_activity(
     activity_id,
-    serialised_activity.clone(),
+    &serialised_activity,
     true,
     sensitive,
     context.pool(),

crates/apub/src/activities/post/create_or_update.rs

@@ -59,6 +59,7 @@ impl CreateOrUpdatePost {
     })
     .await??
     .into();
+
     let create_or_update = CreateOrUpdatePost::new(post, actor, &community, kind, context).await?;
     let id = create_or_update.id.clone();
     let activity = AnnouncableActivities::CreateOrUpdatePost(create_or_update);

crates/apub/src/activity_lists.rs

@@ -1,7 +1,8 @@
 use crate::{
   activities::community::announce::GetCommunity,
   objects::community::ApubCommunity,
-  protocol::activities::{
+  protocol::{
+    activities::{
       community::{
         add_mod::AddMod,
         announce::AnnounceActivity,
@@ -25,6 +26,8 @@ use crate::{
       },
       voting::{undo_vote::UndoVote, vote::Vote},
     },
+    objects::{note::Note, page::Page},
+  },
 };
 use lemmy_apub_lib::traits::ActivityHandler;
 use lemmy_utils::LemmyError;
@@ -79,6 +82,10 @@ pub enum AnnouncableActivities {
   UndoBlockUserFromCommunity(UndoBlockUserFromCommunity),
   AddMod(AddMod),
   RemoveMod(RemoveMod),
+  // For compatibility with Pleroma/Mastodon (send only)
+  Page(Page),
+  // For compatibility with Pleroma/Mastodon (send only)
+  Note(Note),
 }
 
 #[async_trait::async_trait(?Send)]
@@ -101,6 +108,8 @@ impl GetCommunity for AnnouncableActivities {
       UndoBlockUserFromCommunity(a) => a.get_community(context, request_counter).await?,
       AddMod(a) => a.get_community(context, request_counter).await?,
       RemoveMod(a) => a.get_community(context, request_counter).await?,
+      Page(a) => a.get_community(context, request_counter).await?,
+      Note(a) => a.get_community(context, request_counter).await?,
     };
     Ok(community)
   }

crates/apub/src/http/community.rs

@@ -79,7 +79,7 @@ pub(in crate::http) async fn receive_group_inbox(
   context: &LemmyContext,
 ) -> Result<HttpResponse, LemmyError> {
   let actor_id = ObjectId::new(activity_data.actor.clone());
-  let res = receive_activity(request, activity.clone(), activity_data, context).await;
+  let res = receive_activity(request, activity.clone(), activity_data, context).await?;
 
   if let GroupInboxActivities::AnnouncableActivities(announcable) = activity {
     let community = announcable.get_community(context, &mut 0).await?;
@@ -89,7 +89,7 @@ pub(in crate::http) async fn receive_group_inbox(
     }
   }
 
-  res
+  Ok(res)
 }
 
 /// Returns an empty followers collection, only populating the size (for privacy).

crates/apub/src/http/mod.rs

@@ -109,14 +109,7 @@ where
 
   // Log the activity, so we avoid receiving and parsing it twice. Note that this could still happen
   // if we receive the same activity twice in very quick succession.
-  insert_activity(
-    &activity_data.id,
-    activity.clone(),
-    false,
-    true,
-    context.pool(),
-  )
-  .await?;
+  insert_activity(&activity_data.id, &activity, false, true, context.pool()).await?;
 
   info!("Receiving activity {}", activity_data.id.to_string());
   activity

crates/apub/src/lib.rs

@@ -179,7 +179,7 @@ pub async fn get_actor_id_from_name(
 /// persistent.
 async fn insert_activity<T>(
   ap_id: &Url,
-  activity: T,
+  activity: &T,
   local: bool,
   sensitive: bool,
   pool: &DbPool,
@@ -187,9 +187,10 @@ async fn insert_activity<T>(
 where
   T: Serialize + std::fmt::Debug + Send + 'static,
 {
+  let data = serde_json::to_value(activity)?;
   let ap_id = ap_id.to_owned().into();
   blocking(pool, move |conn| {
-    Activity::insert(conn, ap_id, &activity, local, sensitive)
+    Activity::insert(conn, ap_id, data, local, sensitive)
   })
   .await??;
   Ok(())

crates/apub/src/protocol/objects/note.rs

@@ -1,13 +1,24 @@
 use crate::{
+  activities::community::announce::GetCommunity,
   fetcher::post_or_comment::PostOrComment,
-  objects::{comment::ApubComment, person::ApubPerson, post::ApubPost},
+  objects::{comment::ApubComment, community::ApubCommunity, person::ApubPerson, post::ApubPost},
   protocol::Source,
 };
 use activitystreams::{object::kind::NoteType, unparsed::Unparsed};
+use anyhow::anyhow;
 use chrono::{DateTime, FixedOffset};
 use lemmy_api_common::blocking;
-use lemmy_apub_lib::{object_id::ObjectId, values::MediaTypeHtml};
-use lemmy_db_schema::{newtypes::CommentId, source::post::Post, traits::Crud};
+use lemmy_apub_lib::{
+  data::Data,
+  object_id::ObjectId,
+  traits::ActivityHandler,
+  values::MediaTypeHtml,
+};
+use lemmy_db_schema::{
+  newtypes::CommentId,
+  source::{community::Community, post::Post},
+  traits::Crud,
+};
 use lemmy_utils::LemmyError;
 use lemmy_websocket::LemmyContext;
 use serde::{Deserialize, Serialize};
@@ -81,3 +92,33 @@ impl Note {
     }
   }
 }
+
+// For Pleroma/Mastodon compat. Unimplemented because its only used for sending.
+#[async_trait::async_trait(?Send)]
+impl ActivityHandler for Note {
+  type DataType = LemmyContext;
+  async fn verify(&self, _: &Data<Self::DataType>, _: &mut i32) -> Result<(), LemmyError> {
+    Err(anyhow!("Announce/Page can only be sent, not received").into())
+  }
+  async fn receive(self, _: &Data<Self::DataType>, _: &mut i32) -> Result<(), LemmyError> {
+    Ok(())
+  }
+}
+
+#[async_trait::async_trait(?Send)]
+impl GetCommunity for Note {
+  async fn get_community(
+    &self,
+    context: &LemmyContext,
+    request_counter: &mut i32,
+  ) -> Result<ApubCommunity, LemmyError> {
+    let post = self.get_parents(context, request_counter).await?.0;
+    Ok(
+      blocking(context.pool(), move |conn| {
+        Community::read(conn, post.community_id)
+      })
+      .await??
+      .into(),
+    )
+  }
+}

crates/apub/src/protocol/objects/page.rs

@@ -1,11 +1,17 @@
 use crate::{
+  activities::community::announce::GetCommunity,
   objects::{community::ApubCommunity, person::ApubPerson, post::ApubPost},
   protocol::{ImageObject, Source},
 };
 use activitystreams::{object::kind::PageType, unparsed::Unparsed};
 use anyhow::anyhow;
 use chrono::{DateTime, FixedOffset};
-use lemmy_apub_lib::{object_id::ObjectId, values::MediaTypeHtml};
+use lemmy_apub_lib::{
+  data::Data,
+  object_id::ObjectId,
+  traits::ActivityHandler,
+  values::MediaTypeHtml,
+};
 use lemmy_utils::LemmyError;
 use lemmy_websocket::LemmyContext;
 use serde::{Deserialize, Serialize};
@@ -73,3 +79,26 @@ impl Page {
     }
   }
 }
+
+// For Pleroma/Mastodon compat. Unimplemented because its only used for sending.
+#[async_trait::async_trait(?Send)]
+impl ActivityHandler for Page {
+  type DataType = LemmyContext;
+  async fn verify(&self, _: &Data<Self::DataType>, _: &mut i32) -> Result<(), LemmyError> {
+    Err(anyhow!("Announce/Page can only be sent, not received").into())
+  }
+  async fn receive(self, _: &Data<Self::DataType>, _: &mut i32) -> Result<(), LemmyError> {
+    Ok(())
+  }
+}
+
+#[async_trait::async_trait(?Send)]
+impl GetCommunity for Page {
+  async fn get_community(
+    &self,
+    context: &LemmyContext,
+    request_counter: &mut i32,
+  ) -> Result<ApubCommunity, LemmyError> {
+    self.extract_community(context, request_counter).await
+  }
+}

crates/db_schema/src/impls/activity.rs

@@ -1,10 +1,7 @@
 use crate::{newtypes::DbUrl, source::activity::*, traits::Crud};
 use diesel::{dsl::*, result::Error, *};
-use serde::Serialize;
-use std::{
-  fmt::Debug,
-  io::{Error as IoError, ErrorKind},
-};
+use serde_json::Value;
+use std::io::{Error as IoError, ErrorKind};
 
 impl Crud for Activity {
   type Form = ActivityForm;
@@ -38,19 +35,16 @@ impl Crud for Activity {
 }
 
 impl Activity {
-  pub fn insert<T>(
+  pub fn insert(
     conn: &PgConnection,
     ap_id: DbUrl,
-    data: &T,
+    data: Value,
     local: bool,
     sensitive: bool,
-  ) -> Result<Activity, IoError>
-  where
-    T: Serialize + Debug,
-  {
+  ) -> Result<Activity, IoError> {
     let activity_form = ActivityForm {
       ap_id,
-      data: serde_json::to_value(&data)?,
+      data,
       local: Some(local),
       sensitive,
       updated: None,