Only block replies from the community's instance id.

- Also refactor send_local_notifs slightly, since it has to fetch the
  community now.
- Fixes #4590

crates/api_common/src/build_response.rs

@@ -19,7 +19,6 @@ use lemmy_db_schema::{
     comment_reply::{CommentReply, CommentReplyInsertForm},
     person::Person,
     person_mention::{PersonMention, PersonMentionInsertForm},
-    post::Post,
   },
   traits::Crud,
 };
@@ -91,16 +90,19 @@ pub async fn build_post_response(
 #[tracing::instrument(skip_all)]
 pub async fn send_local_notifs(
   mentions: Vec<MentionData>,
-  comment: &Comment,
+  comment_id: CommentId,
   person: &Person,
-  post: &Post,
   do_send_email: bool,
   context: &LemmyContext,
 ) -> Result<Vec<LocalUserId>, LemmyError> {
   let mut recipient_ids = Vec::new();
   let inbox_link = format!("{}/inbox", context.settings().get_protocol_and_hostname());
 
-  let community_id = post.community_id;
+  // Read the comment view to get extra info
+  let comment_view = CommentView::read(&mut context.pool(), comment_id, None).await?;
+  let comment = comment_view.comment;
+  let post = comment_view.post;
+  let community = comment_view.community;
 
   // Send the local mentions
   for mention in mentions
@@ -117,7 +119,7 @@ pub async fn send_local_notifs(
 
       let user_mention_form = PersonMentionInsertForm {
         recipient_id: mention_user_view.person.id,
-        comment_id: comment.id,
+        comment_id,
         read: None,
       };
 
@@ -152,8 +154,9 @@ pub async fn send_local_notifs(
     let check_blocks = check_person_instance_community_block(
       person.id,
       parent_creator_id,
-      person.instance_id,
-      community_id,
+      // Only block from the community's instance_id
+      community.instance_id,
+      community.id,
       &mut context.pool(),
     )
     .await
@@ -194,11 +197,13 @@ pub async fn send_local_notifs(
       }
     }
   } else {
+    // Use the post creator to check blocks
     let check_blocks = check_person_instance_community_block(
       person.id,
       post.creator_id,
-      person.instance_id,
-      community_id,
+      // Only block from the community's instance_id
+      community.instance_id,
+      community.id,
       &mut context.pool(),
     )
     .await

crates/api_common/src/utils.rs

@@ -295,12 +295,12 @@ async fn check_instance_block(
 pub async fn check_person_instance_community_block(
   my_id: PersonId,
   potential_blocker_id: PersonId,
-  instance_id: InstanceId,
+  community_instance_id: InstanceId,
   community_id: CommunityId,
   pool: &mut DbPool<'_>,
 ) -> Result<(), LemmyError> {
   check_person_block(my_id, potential_blocker_id, pool).await?;
-  check_instance_block(instance_id, potential_blocker_id, pool).await?;
+  check_instance_block(community_instance_id, potential_blocker_id, pool).await?;
   check_community_block(community_id, potential_blocker_id, pool).await?;
   Ok(())
 }

crates/api_crud/src/comment/create.rs

@@ -138,9 +138,8 @@ pub async fn create_comment(
   let mentions = scrape_text_for_mentions(&content);
   let recipient_ids = send_local_notifs(
     mentions,
-    &updated_comment,
+    inserted_comment_id,
     &local_user_view.person,
-    &post,
     true,
     &context,
   )

crates/api_crud/src/comment/delete.rs

@@ -8,10 +8,7 @@ use lemmy_api_common::{
   utils::check_community_user_action,
 };
 use lemmy_db_schema::{
-  source::{
-    comment::{Comment, CommentUpdateForm},
-    post::Post,
-  },
+  source::comment::{Comment, CommentUpdateForm},
   traits::Crud,
 };
 use lemmy_db_views::structs::{CommentView, LocalUserView};
@@ -56,17 +53,8 @@ pub async fn delete_comment(
   .await
   .with_lemmy_type(LemmyErrorType::CouldntUpdateComment)?;
 
-  let post_id = updated_comment.post_id;
-  let post = Post::read(&mut context.pool(), post_id).await?;
-  let recipient_ids = send_local_notifs(
-    vec![],
-    &updated_comment,
-    &local_user_view.person,
-    &post,
-    false,
-    &context,
-  )
-  .await?;
+  let recipient_ids =
+    send_local_notifs(vec![], comment_id, &local_user_view.person, false, &context).await?;
   let updated_comment_id = updated_comment.id;
 
   ActivityChannel::submit_activity(

crates/api_crud/src/comment/remove.rs

@@ -12,7 +12,6 @@ use lemmy_db_schema::{
     comment::{Comment, CommentUpdateForm},
     comment_report::CommentReport,
     moderator::{ModRemoveComment, ModRemoveCommentForm},
-    post::Post,
   },
   traits::{Crud, Reportable},
 };
@@ -61,13 +60,10 @@ pub async fn remove_comment(
   };
   ModRemoveComment::create(&mut context.pool(), &form).await?;
 
-  let post_id = updated_comment.post_id;
-  let post = Post::read(&mut context.pool(), post_id).await?;
   let recipient_ids = send_local_notifs(
     vec![],
-    &updated_comment,
+    comment_id,
     &local_user_view.person.clone(),
-    &post,
     false,
     &context,
   )

crates/api_crud/src/comment/update.rs

@@ -79,9 +79,8 @@ pub async fn update_comment(
   let mentions = scrape_text_for_mentions(&updated_comment_content);
   let recipient_ids = send_local_notifs(
     mentions,
-    &updated_comment,
+    comment_id,
     &local_user_view.person,
-    &orig_comment.post,
     false,
     &context,
   )

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

@@ -159,8 +159,6 @@ impl ActivityHandler for CreateOrUpdateNote {
     CommentAggregates::update_hot_rank(&mut context.pool(), comment.id).await?;
 
     let do_send_email = self.kind == CreateOrUpdateType::Create;
-    let post_id = comment.post_id;
-    let post = Post::read(&mut context.pool(), post_id).await?;
     let actor = self.actor.dereference(context).await?;
 
     // Note:
@@ -169,7 +167,7 @@ impl ActivityHandler for CreateOrUpdateNote {
     // anyway.
     // TODO: for compatibility with other projects, it would be much better to read this from cc or tags
     let mentions = scrape_text_for_mentions(&comment.content);
-    send_local_notifs(mentions, &comment.0, &actor, &post, do_send_email, context).await?;
+    send_local_notifs(mentions, comment.id, &actor, do_send_email, context).await?;
     Ok(())
   }
 }