use filter on insert

crates/apub/src/objects/comment.rs

@@ -2,7 +2,7 @@ use crate::{
   activities::{verify_is_public, verify_person_in_community},
   check_apub_id_valid_with_strictness,
   mentions::collect_non_local_mentions,
-  objects::{read_from_string_or_source, verify_is_remote_object, verify_object_timestamp},
+  objects::{read_from_string_or_source, verify_is_remote_object},
   protocol::{
     objects::{note::Note, LanguageTag},
     InCommunity,
@@ -29,6 +29,7 @@ use lemmy_db_schema::{
     post::Post,
   },
   traits::Crud,
+  utils::naive_now,
 };
 use lemmy_utils::{
   error::{LemmyError, LemmyErrorType},
@@ -142,14 +143,6 @@ impl Object for ApubComment {
     verify_is_remote_object(note.id.inner(), context.settings())?;
     verify_person_in_community(&note.attributed_to, &community, context).await?;
 
-    let old_comment = note.id.dereference_local(context).await;
-    let old_timestamp = old_comment
-      .as_ref()
-      .map(|c| c.updated.unwrap_or(c.published))
-      .clone()
-      .ok();
-    verify_object_timestamp(old_timestamp, note.updated.or(note.published))?;
-
     let (post, _) = note.get_parents(context).await?;
     let creator = note.attributed_to.dereference(context).await?;
     let is_mod_or_admin = is_mod_or_admin(&mut context.pool(), &creator, community.id)
@@ -193,7 +186,14 @@ impl Object for ApubComment {
       language_id,
     };
     let parent_comment_path = parent_comment.map(|t| t.0.path);
-    let comment = Comment::create(&mut context.pool(), &form, parent_comment_path.as_ref()).await?;
+    let timestamp = note.updated.or(note.published).unwrap_or_else(naive_now);
+    let comment = Comment::insert_apub(
+      &mut context.pool(),
+      timestamp,
+      &form,
+      parent_comment_path.as_ref(),
+    )
+    .await?;
     Ok(comment.into())
   }
 }

crates/apub/src/objects/community.rs

@@ -175,7 +175,8 @@ impl Object for ApubCommunity {
     let languages =
       LanguageTag::to_language_id_multiple(group.language, &mut context.pool()).await?;
 
-    let community = Community::create(&mut context.pool(), &form).await?;
+    let timestamp = group.updated.or(group.published).unwrap_or_else(naive_now);
+    let community = Community::insert_apub(&mut context.pool(), timestamp, &form).await?;
     CommunityLanguage::update(&mut context.pool(), languages, community.id).await?;
 
     let community: ApubCommunity = community.into();

crates/apub/src/objects/mod.rs

@@ -1,7 +1,6 @@
 use crate::protocol::Source;
 use activitypub_federation::protocol::values::MediaTypeMarkdownOrHtml;
 use anyhow::anyhow;
-use chrono::{DateTime, Utc};
 use html2md::parse_html;
 use lemmy_utils::{error::LemmyError, settings::structs::Settings};
 use url::Url;
@@ -52,34 +51,3 @@ pub(crate) fn verify_is_remote_object(id: &Url, settings: &Settings) -> Result<(
     Ok(())
   }
 }
-
-/// When receiving a federated object, check that the timestamp is newer than the latest version stored
-/// locally. Necessary to reject edits which are received in wrong order.
-pub(crate) fn verify_object_timestamp(
-  old_timestamp: Option<DateTime<Utc>>,
-  new_timestamp: Option<DateTime<Utc>>,
-) -> Result<(), LemmyError> {
-  if let (Some(old_timestamp), Some(new_timestamp)) = (old_timestamp, new_timestamp) {
-    if new_timestamp < old_timestamp {
-      return Err(anyhow!("Ignoring old object edit").into());
-    }
-  }
-  Ok(())
-}
-
-#[cfg(test)]
-pub(crate) mod tests {
-  use super::*;
-  use chrono::TimeZone;
-
-  #[test]
-  fn test_verify_object_timestamp() {
-    let old = Some(Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap());
-    let new = Some(Utc.with_ymd_and_hms(2024, 2, 1, 0, 0, 0).unwrap());
-
-    assert!(verify_object_timestamp(old, new).is_ok());
-    assert!(verify_object_timestamp(None, new).is_ok());
-    assert!(verify_object_timestamp(old, None).is_ok());
-    assert!(verify_object_timestamp(new, old).is_err());
-  }
-}

crates/apub/src/objects/post.rs

@@ -2,7 +2,7 @@ use crate::{
   activities::{verify_is_public, verify_person_in_community},
   check_apub_id_valid_with_strictness,
   local_site_data_cached,
-  objects::{read_from_string_or_source_opt, verify_is_remote_object, verify_object_timestamp},
+  objects::{read_from_string_or_source_opt, verify_is_remote_object},
   protocol::{
     objects::{
       page::{Attachment, AttributedTo, Hashtag, HashtagType, Page, PageType},
@@ -41,6 +41,7 @@ use lemmy_db_schema::{
     post::{Post, PostInsertForm, PostUpdateForm},
   },
   traits::Crud,
+  utils::naive_now,
 };
 use lemmy_db_views_actor::structs::CommunityModeratorView;
 use lemmy_utils::{
@@ -216,13 +217,6 @@ impl Object for ApubPost {
     // read existing, local post if any (for generating mod log)
     let old_post = page.id.dereference_local(context).await;
 
-    let old_timestamp = old_post
-      .as_ref()
-      .map(|p| p.updated.unwrap_or(p.published))
-      .clone()
-      .ok();
-    verify_object_timestamp(old_timestamp, page.updated.or(page.published))?;
-
     let first_attachment = page.attachment.first();
     let local_site = LocalSite::read(&mut context.pool()).await.ok();
 
@@ -277,7 +271,8 @@ impl Object for ApubPost {
         .build()
     };
 
-    let post = Post::create(&mut context.pool(), &form).await?;
+    let timestamp = page.updated.or(page.published).unwrap_or_else(naive_now);
+    let post = Post::insert_apub(&mut context.pool(), timestamp, &form).await?;
 
     generate_post_link_metadata(
       post.clone(),

crates/apub/src/objects/private_message.rs

@@ -1,6 +1,6 @@
 use crate::{
   check_apub_id_valid_with_strictness,
-  objects::{read_from_string_or_source, verify_object_timestamp},
+  objects::read_from_string_or_source,
   protocol::{
     objects::chat_message::{ChatMessage, ChatMessageType},
     Source,
@@ -23,6 +23,7 @@ use lemmy_db_schema::{
     private_message::{PrivateMessage, PrivateMessageInsertForm},
   },
   traits::Crud,
+  utils::naive_now,
 };
 use lemmy_utils::{
   error::{LemmyError, LemmyErrorType},
@@ -105,14 +106,6 @@ impl Object for ApubPrivateMessage {
     verify_domains_match(note.id.inner(), expected_domain)?;
     verify_domains_match(note.attributed_to.inner(), note.id.inner())?;
 
-    let old_pm = note.id.dereference_local(context).await;
-    let old_timestamp = old_pm
-      .as_ref()
-      .map(|c| c.updated.unwrap_or(c.published))
-      .clone()
-      .ok();
-    verify_object_timestamp(old_timestamp, note.updated.or(note.published))?;
-
     check_apub_id_valid_with_strictness(note.id.inner(), false, context).await?;
     let person = note.attributed_to.dereference(context).await?;
     if person.banned {
@@ -150,7 +143,8 @@ impl Object for ApubPrivateMessage {
       ap_id: Some(note.id.into()),
       local: Some(false),
     };
-    let pm = PrivateMessage::create(&mut context.pool(), &form).await?;
+    let timestamp = note.updated.or(note.published).unwrap_or_else(naive_now);
+    let pm = PrivateMessage::insert_apub(&mut context.pool(), timestamp, &form).await?;
     Ok(pm.into())
   }
 }

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

@@ -7,7 +7,7 @@ use crate::{
     community_outbox::ApubCommunityOutbox,
   },
   local_site_data_cached,
-  objects::{community::ApubCommunity, read_from_string_or_source_opt, verify_object_timestamp},
+  objects::{community::ApubCommunity, read_from_string_or_source_opt},
   protocol::{
     objects::{Endpoints, LanguageTag},
     ImageObject,
@@ -89,14 +89,6 @@ impl Group {
     let description = read_from_string_or_source_opt(&self.summary, &None, &self.source);
     check_slurs_opt(&description, slur_regex)?;
 
-    let old_communmity = self.id.dereference_local(context).await;
-    let old_timestamp = old_communmity
-      .as_ref()
-      .map(|c| c.updated.unwrap_or(c.published))
-      .clone()
-      .ok();
-    verify_object_timestamp(old_timestamp, self.updated.or(self.published))?;
-
     Ok(())
   }
 }

crates/db_schema/src/impls/comment.rs

@@ -1,4 +1,5 @@
 use crate::{
+  diesel::DecoratableTarget,
   newtypes::{CommentId, DbUrl, PersonId},
   schema::comment,
   source::comment::{
@@ -13,6 +14,7 @@ use crate::{
   traits::{Crud, Likeable, Saveable},
   utils::{get_conn, naive_now, DbPool, DELETED_REPLACEMENT_TEXT},
 };
+use chrono::{DateTime, Utc};
 use diesel::{
   dsl::{insert_into, sql_query},
   result::Error,
@@ -59,6 +61,16 @@ impl Comment {
     pool: &mut DbPool<'_>,
     comment_form: &CommentInsertForm,
     parent_path: Option<&Ltree>,
+  ) -> Result<Comment, Error> {
+    // TODO: shouldnt have on_conflict clause when called from here
+    Self::insert_apub(pool, naive_now(), comment_form, parent_path).await
+  }
+
+  pub async fn insert_apub(
+    pool: &mut DbPool<'_>,
+    timestamp: DateTime<Utc>,
+    comment_form: &CommentInsertForm,
+    parent_path: Option<&Ltree>,
   ) -> Result<Comment, Error> {
     let conn = &mut get_conn(pool).await?;
 
@@ -70,6 +82,7 @@ impl Comment {
           let inserted_comment = insert_into(comment::table)
             .values(comment_form)
             .on_conflict(comment::ap_id)
+            .filter_target(comment::published.lt(timestamp))
             .do_update()
             .set(comment_form)
             .get_result::<Self>(conn)
@@ -129,6 +142,7 @@ where ca.comment_id = c.id"
       })
       .await
   }
+
   pub async fn read_from_apub_id(
     pool: &mut DbPool<'_>,
     object_id: Url,

crates/db_schema/src/impls/community.rs

@@ -1,4 +1,5 @@
 use crate::{
+  diesel::DecoratableTarget,
   newtypes::{CommunityId, DbUrl, PersonId},
   schema::{community, community_follower, instance},
   source::{
@@ -20,6 +21,7 @@ use crate::{
   utils::{functions::lower, get_conn, DbPool},
   SubscribedType,
 };
+use chrono::{DateTime, Utc};
 use diesel::{
   deserialize,
   dsl,
@@ -43,25 +45,15 @@ impl Crud for Community {
   type IdType = CommunityId;
 
   async fn create(pool: &mut DbPool<'_>, form: &Self::InsertForm) -> Result<Self, Error> {
-    let is_new_community = match &form.actor_id {
-      Some(id) => Community::read_from_apub_id(pool, id).await?.is_none(),
-      None => true,
-    };
     let conn = &mut get_conn(pool).await?;
 
-    // Can't do separate insert/update commands because InsertForm/UpdateForm aren't convertible
     let community_ = insert_into(community::table)
       .values(form)
-      .on_conflict(community::actor_id)
-      .do_update()
-      .set(form)
       .get_result::<Self>(conn)
       .await?;
 
     // Initialize languages for new community
-    if is_new_community {
-      CommunityLanguage::update(pool, vec![], community_.id).await?;
-    }
+    CommunityLanguage::update(pool, vec![], community_.id).await?;
 
     Ok(community_)
   }
@@ -115,6 +107,35 @@ pub enum CollectionType {
 }
 
 impl Community {
+  pub async fn insert_apub(
+    pool: &mut DbPool<'_>,
+    timestamp: DateTime<Utc>,
+    form: &CommunityInsertForm,
+  ) -> Result<Self, Error> {
+    let is_new_community = match &form.actor_id {
+      Some(id) => Community::read_from_apub_id(pool, id).await?.is_none(),
+      None => true,
+    };
+    let conn = &mut get_conn(pool).await?;
+
+    // Can't do separate insert/update commands because InsertForm/UpdateForm aren't convertible
+    let community_ = insert_into(community::table)
+      .values(form)
+      .on_conflict(community::actor_id)
+      .filter_target(community::published.lt(timestamp))
+      .do_update()
+      .set(form)
+      .get_result::<Self>(conn)
+      .await?;
+
+    // Initialize languages for new community
+    if is_new_community {
+      CommunityLanguage::update(pool, vec![], community_.id).await?;
+    }
+
+    Ok(community_)
+  }
+
   /// Get the community which has a given moderators or featured url, also return the collection type
   pub async fn get_by_collection_url(
     pool: &mut DbPool<'_>,

crates/db_schema/src/impls/post.rs

@@ -27,8 +27,15 @@ use crate::{
   },
 };
 use ::url::Url;
-use chrono::Utc;
-use diesel::{dsl::insert_into, result::Error, ExpressionMethods, QueryDsl, TextExpressionMethods};
+use chrono::{DateTime, Utc};
+use diesel::{
+  dsl::insert_into,
+  result::Error,
+  DecoratableTarget,
+  ExpressionMethods,
+  QueryDsl,
+  TextExpressionMethods,
+};
 use diesel_async::RunQueryDsl;
 use std::collections::HashSet;
 
@@ -42,9 +49,6 @@ impl Crud for Post {
     let conn = &mut get_conn(pool).await?;
     insert_into(post::table)
       .values(form)
-      .on_conflict(post::ap_id)
-      .do_update()
-      .set(form)
       .get_result::<Self>(conn)
       .await
   }
@@ -63,6 +67,22 @@ impl Crud for Post {
 }
 
 impl Post {
+  pub async fn insert_apub(
+    pool: &mut DbPool<'_>,
+    timestamp: DateTime<Utc>,
+    form: &PostInsertForm,
+  ) -> Result<Self, Error> {
+    let conn = &mut get_conn(pool).await?;
+    insert_into(post::table)
+      .values(form)
+      .on_conflict(post::ap_id)
+      .filter_target(post::published.lt(timestamp))
+      .do_update()
+      .set(form)
+      .get_result::<Self>(conn)
+      .await
+  }
+
   pub async fn list_for_community(
     pool: &mut DbPool<'_>,
     the_community_id: CommunityId,