]> Untitled Git - lemmy.git/blobdiff - crates/apub/src/objects/comment.rs
Rewrite fetcher (#1792)
[lemmy.git] / crates / apub / src / objects / comment.rs
index 6c218190ab6061e00ba6e84a715c507575dbd2dd..f334487101fa108268f19362319993b226062aa1 100644 (file)
@@ -1,32 +1,34 @@
 use crate::{
+  activities::verify_person_in_community,
   extensions::context::lemmy_context,
-  fetcher::objects::{get_or_fetch_and_insert_comment, get_or_fetch_and_insert_post},
-  objects::{
-    check_object_domain,
-    check_object_for_community_or_site_ban,
-    create_tombstone,
-    get_object_from_apub,
-    get_or_fetch_and_upsert_user,
-    get_source_markdown_value,
-    set_content_and_source,
-    FromApub,
-    FromApubToForm,
-    ToApub,
-  },
-  NoteExt,
+  fetcher::object_id::ObjectId,
+  migrations::CommentInReplyToMigration,
+  objects::{create_tombstone, FromApub, Source, ToApub},
+  ActorType,
+  PostOrComment,
 };
 use activitystreams::{
-  object::{kind::NoteType, ApObject, Note, Tombstone},
-  prelude::*,
-  public,
+  base::AnyBase,
+  object::{kind::NoteType, Tombstone},
+  primitives::OneOrMany,
+  unparsed::Unparsed,
 };
 use anyhow::{anyhow, Context};
-use lemmy_api_structs::blocking;
-use lemmy_db_queries::{Crud, DbPool};
-use lemmy_db_schema::source::{
-  comment::{Comment, CommentForm},
-  post::Post,
-  user::User_,
+use chrono::{DateTime, FixedOffset};
+use lemmy_api_common::blocking;
+use lemmy_apub_lib::{
+  values::{MediaTypeHtml, MediaTypeMarkdown, PublicUrl},
+  verify_domains_match,
+};
+use lemmy_db_queries::{source::comment::Comment_, Crud, DbPool};
+use lemmy_db_schema::{
+  source::{
+    comment::{Comment, CommentForm},
+    community::Community,
+    person::Person,
+    post::Post,
+  },
+  CommentId,
 };
 use lemmy_utils::{
   location_info,
@@ -34,17 +36,123 @@ use lemmy_utils::{
   LemmyError,
 };
 use lemmy_websocket::LemmyContext;
+use serde::{Deserialize, Serialize};
+use serde_with::skip_serializing_none;
+use std::ops::Deref;
 use url::Url;
 
+#[skip_serializing_none]
+#[derive(Clone, Debug, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Note {
+  #[serde(rename = "@context")]
+  context: OneOrMany<AnyBase>,
+  r#type: NoteType,
+  id: Url,
+  pub(crate) attributed_to: ObjectId<Person>,
+  /// Indicates that the object is publicly readable. Unlike [`Post.to`], this one doesn't contain
+  /// the community ID, as it would be incompatible with Pleroma (and we can get the community from
+  /// the post in [`in_reply_to`]).
+  to: PublicUrl,
+  content: String,
+  media_type: MediaTypeHtml,
+  source: Source,
+  in_reply_to: CommentInReplyToMigration,
+  published: DateTime<FixedOffset>,
+  updated: Option<DateTime<FixedOffset>>,
+  #[serde(flatten)]
+  unparsed: Unparsed,
+}
+
+impl Note {
+  pub(crate) fn id_unchecked(&self) -> &Url {
+    &self.id
+  }
+  pub(crate) fn id(&self, expected_domain: &Url) -> Result<&Url, LemmyError> {
+    verify_domains_match(&self.id, expected_domain)?;
+    Ok(&self.id)
+  }
+
+  async fn get_parents(
+    &self,
+    context: &LemmyContext,
+    request_counter: &mut i32,
+  ) -> Result<(Post, Option<CommentId>), LemmyError> {
+    match &self.in_reply_to {
+      CommentInReplyToMigration::Old(in_reply_to) => {
+        // This post, or the parent comment might not yet exist on this server yet, fetch them.
+        let post_id = in_reply_to.get(0).context(location_info!())?;
+        let post_id = ObjectId::new(post_id.clone());
+        let post = Box::pin(post_id.dereference(context, request_counter)).await?;
+
+        // The 2nd item, if it exists, is the parent comment apub_id
+        // Nested comments will automatically get fetched recursively
+        let parent_id: Option<CommentId> = match in_reply_to.get(1) {
+          Some(comment_id) => {
+            let comment_id = ObjectId::<Comment>::new(comment_id.clone());
+            let parent_comment = Box::pin(comment_id.dereference(context, request_counter)).await?;
+
+            Some(parent_comment.id)
+          }
+          None => None,
+        };
+
+        Ok((post, parent_id))
+      }
+      CommentInReplyToMigration::New(in_reply_to) => {
+        let parent = Box::pin(in_reply_to.dereference(context, request_counter).await?);
+        match parent.deref() {
+          PostOrComment::Post(p) => {
+            // Workaround because I cant figure ut how to get the post out of the box (and we dont
+            // want to stackoverflow in a deep comment hierarchy).
+            let post_id = p.id;
+            let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
+            Ok((post, None))
+          }
+          PostOrComment::Comment(c) => {
+            let post_id = c.post_id;
+            let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
+            Ok((post, Some(c.id)))
+          }
+        }
+      }
+    }
+  }
+
+  pub(crate) async fn verify(
+    &self,
+    context: &LemmyContext,
+    request_counter: &mut i32,
+  ) -> Result<(), LemmyError> {
+    let (post, _parent_comment_id) = self.get_parents(context, request_counter).await?;
+    let community_id = post.community_id;
+    let community = blocking(context.pool(), move |conn| {
+      Community::read(conn, community_id)
+    })
+    .await??;
+
+    if post.locked {
+      return Err(anyhow!("Post is locked").into());
+    }
+    verify_domains_match(self.attributed_to.inner(), &self.id)?;
+    verify_person_in_community(
+      &self.attributed_to,
+      &ObjectId::new(community.actor_id()),
+      context,
+      request_counter,
+    )
+    .await?;
+    Ok(())
+  }
+}
+
 #[async_trait::async_trait(?Send)]
 impl ToApub for Comment {
-  type ApubType = NoteExt;
-
-  async fn to_apub(&self, pool: &DbPool) -> Result<NoteExt, LemmyError> {
-    let mut comment = ApObject::new(Note::new());
+  type ApubType = Note;
 
+  async fn to_apub(&self, pool: &DbPool) -> Result<Note, LemmyError> {
     let creator_id = self.creator_id;
-    let creator = blocking(pool, move |conn| User_::read(conn, creator_id)).await??;
+    let creator = blocking(pool, move |conn| Person::read(conn, creator_id)).await??;
 
     let post_id = self.post_id;
     let post = blocking(pool, move |conn| Post::read(conn, post_id)).await??;
@@ -59,22 +167,25 @@ impl ToApub for Comment {
       in_reply_to_vec.push(parent_comment.ap_id.into_inner());
     }
 
-    comment
-      // Not needed when the Post is embedded in a collection (like for community outbox)
-      .set_many_contexts(lemmy_context()?)
-      .set_id(self.ap_id.to_owned().into_inner())
-      .set_published(convert_datetime(self.published))
-      .set_to(public())
-      .set_many_in_reply_tos(in_reply_to_vec)
-      .set_attributed_to(creator.actor_id.into_inner());
-
-    set_content_and_source(&mut comment, &self.content)?;
-
-    if let Some(u) = self.updated {
-      comment.set_updated(convert_datetime(u));
-    }
+    let note = Note {
+      context: lemmy_context(),
+      r#type: NoteType::Note,
+      id: self.ap_id.to_owned().into_inner(),
+      attributed_to: ObjectId::new(creator.actor_id),
+      to: PublicUrl::Public,
+      content: self.content.clone(),
+      media_type: MediaTypeHtml::Html,
+      source: Source {
+        content: self.content.clone(),
+        media_type: MediaTypeMarkdown::Markdown,
+      },
+      in_reply_to: CommentInReplyToMigration::Old(in_reply_to_vec),
+      published: convert_datetime(self.published),
+      updated: self.updated.map(convert_datetime),
+      unparsed: Default::default(),
+    };
 
-    Ok(comment)
+    Ok(note)
   }
 
   fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
@@ -89,95 +200,43 @@ impl ToApub for Comment {
 
 #[async_trait::async_trait(?Send)]
 impl FromApub for Comment {
-  type ApubType = NoteExt;
+  type ApubType = Note;
 
   /// Converts a `Note` to `Comment`.
   ///
   /// If the parent community, post and comment(s) are not known locally, these are also fetched.
   async fn from_apub(
-    note: &NoteExt,
+    note: &Note,
     context: &LemmyContext,
-    expected_domain: Url,
+    expected_domain: &Url,
     request_counter: &mut i32,
   ) -> Result<Comment, LemmyError> {
-    let comment: Comment =
-      get_object_from_apub(note, context, expected_domain, request_counter).await?;
-
-    let post_id = comment.post_id;
-    let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
-    check_object_for_community_or_site_ban(note, post.community_id, context, request_counter)
+    let ap_id = Some(note.id(expected_domain)?.clone().into());
+    let creator = note
+      .attributed_to
+      .dereference(context, request_counter)
       .await?;
+    let (post, parent_comment_id) = note.get_parents(context, request_counter).await?;
     if post.locked {
-      // This is not very efficient because a comment gets inserted just to be deleted right
-      // afterwards, but it seems to be the easiest way to implement it.
-      blocking(context.pool(), move |conn| {
-        Comment::delete(conn, comment.id)
-      })
-      .await??;
-      Err(anyhow!("Post is locked").into())
-    } else {
-      Ok(comment)
+      return Err(anyhow!("Post is locked").into());
     }
-  }
-}
-
-#[async_trait::async_trait(?Send)]
-impl FromApubToForm<NoteExt> for CommentForm {
-  async fn from_apub(
-    note: &NoteExt,
-    context: &LemmyContext,
-    expected_domain: Url,
-    request_counter: &mut i32,
-  ) -> Result<CommentForm, LemmyError> {
-    let creator_actor_id = &note
-      .attributed_to()
-      .context(location_info!())?
-      .as_single_xsd_any_uri()
-      .context(location_info!())?;
-
-    let creator = get_or_fetch_and_upsert_user(creator_actor_id, context, request_counter).await?;
-
-    let mut in_reply_tos = note
-      .in_reply_to()
-      .as_ref()
-      .context(location_info!())?
-      .as_many()
-      .context(location_info!())?
-      .iter()
-      .map(|i| i.as_xsd_any_uri().context(""));
-    let post_ap_id = in_reply_tos.next().context(location_info!())??;
-
-    // This post, or the parent comment might not yet exist on this server yet, fetch them.
-    let post = get_or_fetch_and_insert_post(&post_ap_id, context, request_counter).await?;
-
-    // The 2nd item, if it exists, is the parent comment apub_id
-    // For deeply nested comments, FromApub automatically gets called recursively
-    let parent_id: Option<i32> = match in_reply_tos.next() {
-      Some(parent_comment_uri) => {
-        let parent_comment_ap_id = &parent_comment_uri?;
-        let parent_comment =
-          get_or_fetch_and_insert_comment(&parent_comment_ap_id, context, request_counter).await?;
-
-        Some(parent_comment.id)
-      }
-      None => None,
-    };
 
-    let content = get_source_markdown_value(note)?.context(location_info!())?;
-    let content_slurs_removed = remove_slurs(&content);
+    let content = &note.source.content;
+    let content_slurs_removed = remove_slurs(content);
 
-    Ok(CommentForm {
+    let form = CommentForm {
       creator_id: creator.id,
       post_id: post.id,
-      parent_id,
+      parent_id: parent_comment_id,
       content: content_slurs_removed,
       removed: None,
       read: None,
-      published: note.published().map(|u| u.to_owned().naive_local()),
-      updated: note.updated().map(|u| u.to_owned().naive_local()),
+      published: Some(note.published.naive_local()),
+      updated: note.updated.map(|u| u.to_owned().naive_local()),
       deleted: None,
-      ap_id: Some(check_object_domain(note, expected_domain)?),
-      local: false,
-    })
+      ap_id,
+      local: Some(false),
+    };
+    Ok(blocking(context.pool(), move |conn| Comment::upsert(conn, &form)).await??)
   }
 }