mirror of
https://github.com/LemmyNet/lemmy.git
synced 2024-06-01 00:28:05 +00:00
570 lines
17 KiB
Rust
570 lines
17 KiB
Rust
use crate::{
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apub::{
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activities::{generate_activity_id, send_activity_to_community},
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check_actor_domain,
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create_apub_response,
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create_apub_tombstone_response,
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create_tombstone,
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fetch_webfinger_url,
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fetcher::{
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get_or_fetch_and_insert_comment,
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get_or_fetch_and_insert_post,
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get_or_fetch_and_upsert_user,
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},
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ActorType,
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ApubLikeableType,
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ApubObjectType,
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FromApub,
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ToApub,
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},
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blocking,
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DbPool,
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LemmyContext,
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};
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use activitystreams::{
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activity::{
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kind::{CreateType, DeleteType, DislikeType, LikeType, RemoveType, UndoType, UpdateType},
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Create,
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Delete,
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Dislike,
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Like,
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Remove,
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Undo,
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Update,
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},
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base::AnyBase,
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link::Mention,
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object::{kind::NoteType, Note, Tombstone},
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prelude::*,
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public,
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};
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use actix_web::{body::Body, web, web::Path, HttpResponse};
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use anyhow::Context;
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use itertools::Itertools;
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use lemmy_db::{
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comment::{Comment, CommentForm},
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community::Community,
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post::Post,
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user::User_,
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Crud,
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};
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use lemmy_utils::{
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convert_datetime,
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location_info,
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remove_slurs,
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scrape_text_for_mentions,
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LemmyError,
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MentionData,
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};
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use log::debug;
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use serde::Deserialize;
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use serde_json::Error;
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use url::Url;
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#[derive(Deserialize)]
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pub struct CommentQuery {
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comment_id: String,
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}
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/// Return the post json over HTTP.
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pub async fn get_apub_comment(
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info: Path<CommentQuery>,
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context: web::Data<LemmyContext>,
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) -> Result<HttpResponse<Body>, LemmyError> {
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let id = info.comment_id.parse::<i32>()?;
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let comment = blocking(context.pool(), move |conn| Comment::read(conn, id)).await??;
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if !comment.deleted {
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Ok(create_apub_response(
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&comment.to_apub(context.pool()).await?,
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))
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} else {
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Ok(create_apub_tombstone_response(&comment.to_tombstone()?))
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}
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}
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#[async_trait::async_trait(?Send)]
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impl ToApub for Comment {
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type Response = Note;
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async fn to_apub(&self, pool: &DbPool) -> Result<Note, LemmyError> {
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let mut comment = Note::new();
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let creator_id = self.creator_id;
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let creator = blocking(pool, move |conn| User_::read(conn, creator_id)).await??;
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let post_id = self.post_id;
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let post = blocking(pool, move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
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// Add a vector containing some important info to the "in_reply_to" field
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// [post_ap_id, Option(parent_comment_ap_id)]
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let mut in_reply_to_vec = vec![post.ap_id];
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if let Some(parent_id) = self.parent_id {
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let parent_comment = blocking(pool, move |conn| Comment::read(conn, parent_id)).await??;
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in_reply_to_vec.push(parent_comment.ap_id);
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}
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comment
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// Not needed when the Post is embedded in a collection (like for community outbox)
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.set_context(activitystreams::context())
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.set_id(Url::parse(&self.ap_id)?)
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.set_published(convert_datetime(self.published))
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.set_to(community.actor_id)
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.set_many_in_reply_tos(in_reply_to_vec)
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.set_content(self.content.to_owned())
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.set_attributed_to(creator.actor_id);
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if let Some(u) = self.updated {
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comment.set_updated(convert_datetime(u));
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}
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Ok(comment)
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}
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fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
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create_tombstone(self.deleted, &self.ap_id, self.updated, NoteType::Note)
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}
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}
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#[async_trait::async_trait(?Send)]
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impl FromApub for CommentForm {
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type ApubType = Note;
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/// Parse an ActivityPub note received from another instance into a Lemmy comment
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async fn from_apub(
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note: &Note,
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context: &LemmyContext,
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expected_domain: Option<Url>,
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) -> Result<CommentForm, LemmyError> {
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let creator_actor_id = ¬e
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.attributed_to()
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.context(location_info!())?
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.as_single_xsd_any_uri()
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.context(location_info!())?;
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let creator = get_or_fetch_and_upsert_user(creator_actor_id, context).await?;
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let mut in_reply_tos = note
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.in_reply_to()
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.as_ref()
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.context(location_info!())?
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.as_many()
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.context(location_info!())?
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.iter()
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.map(|i| i.as_xsd_any_uri().context(""));
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let post_ap_id = in_reply_tos.next().context(location_info!())??;
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// This post, or the parent comment might not yet exist on this server yet, fetch them.
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let post = get_or_fetch_and_insert_post(&post_ap_id, context).await?;
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// The 2nd item, if it exists, is the parent comment apub_id
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// For deeply nested comments, FromApub automatically gets called recursively
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let parent_id: Option<i32> = match in_reply_tos.next() {
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Some(parent_comment_uri) => {
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let parent_comment_ap_id = &parent_comment_uri?;
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let parent_comment =
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get_or_fetch_and_insert_comment(&parent_comment_ap_id, context).await?;
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Some(parent_comment.id)
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}
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None => None,
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};
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let content = note
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.content()
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.context(location_info!())?
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.as_single_xsd_string()
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.context(location_info!())?
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.to_string();
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let content_slurs_removed = remove_slurs(&content);
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Ok(CommentForm {
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creator_id: creator.id,
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post_id: post.id,
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parent_id,
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content: content_slurs_removed,
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removed: None,
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read: None,
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published: note.published().map(|u| u.to_owned().naive_local()),
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updated: note.updated().map(|u| u.to_owned().naive_local()),
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deleted: None,
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ap_id: Some(check_actor_domain(note, expected_domain)?),
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local: false,
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})
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}
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}
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#[async_trait::async_trait(?Send)]
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impl ApubObjectType for Comment {
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/// Send out information about a newly created comment, to the followers of the community.
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async fn send_create(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let maa = collect_non_local_mentions_and_addresses(&self.content, &community, context).await?;
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let mut create = Create::new(creator.actor_id.to_owned(), note.into_any_base()?);
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create
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(CreateType::Create)?)
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.set_to(public())
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.set_many_ccs(maa.addressed_ccs.to_owned())
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// Set the mention tags
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.set_many_tags(maa.get_tags()?);
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send_activity_to_community(&creator, &community, maa.inboxes, create, context).await?;
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Ok(())
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}
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/// Send out information about an edited post, to the followers of the community.
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async fn send_update(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let maa = collect_non_local_mentions_and_addresses(&self.content, &community, context).await?;
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let mut update = Update::new(creator.actor_id.to_owned(), note.into_any_base()?);
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update
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(UpdateType::Update)?)
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.set_to(public())
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.set_many_ccs(maa.addressed_ccs.to_owned())
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// Set the mention tags
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.set_many_tags(maa.get_tags()?);
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send_activity_to_community(&creator, &community, maa.inboxes, update, context).await?;
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Ok(())
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}
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async fn send_delete(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let mut delete = Delete::new(creator.actor_id.to_owned(), note.into_any_base()?);
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delete
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(DeleteType::Delete)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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&creator,
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&community,
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vec![community.get_shared_inbox_url()?],
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delete,
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context,
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)
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.await?;
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Ok(())
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}
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async fn send_undo_delete(
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&self,
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creator: &User_,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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// Generate a fake delete activity, with the correct object
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let mut delete = Delete::new(creator.actor_id.to_owned(), note.into_any_base()?);
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delete
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(DeleteType::Delete)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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// Undo that fake activity
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let mut undo = Undo::new(creator.actor_id.to_owned(), delete.into_any_base()?);
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undo
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(UndoType::Undo)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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&creator,
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&community,
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vec![community.get_shared_inbox_url()?],
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undo,
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context,
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)
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.await?;
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Ok(())
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}
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async fn send_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let mut remove = Remove::new(mod_.actor_id.to_owned(), note.into_any_base()?);
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remove
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(RemoveType::Remove)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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&mod_,
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&community,
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vec![community.get_shared_inbox_url()?],
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remove,
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context,
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)
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.await?;
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Ok(())
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}
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async fn send_undo_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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// Generate a fake delete activity, with the correct object
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let mut remove = Remove::new(mod_.actor_id.to_owned(), note.into_any_base()?);
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remove
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(RemoveType::Remove)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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// Undo that fake activity
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let mut undo = Undo::new(mod_.actor_id.to_owned(), remove.into_any_base()?);
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undo
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(UndoType::Undo)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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&mod_,
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&community,
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vec![community.get_shared_inbox_url()?],
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undo,
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context,
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)
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.await?;
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Ok(())
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}
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}
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#[async_trait::async_trait(?Send)]
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impl ApubLikeableType for Comment {
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async fn send_like(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let mut like = Like::new(creator.actor_id.to_owned(), note.into_any_base()?);
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like
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(LikeType::Like)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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&creator,
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&community,
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vec![community.get_shared_inbox_url()?],
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like,
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context,
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)
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.await?;
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Ok(())
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}
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async fn send_dislike(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let mut dislike = Dislike::new(creator.actor_id.to_owned(), note.into_any_base()?);
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dislike
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(DislikeType::Dislike)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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&creator,
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&community,
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vec![community.get_shared_inbox_url()?],
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dislike,
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context,
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)
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.await?;
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Ok(())
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}
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async fn send_undo_like(
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&self,
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creator: &User_,
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let note = self.to_apub(context.pool()).await?;
|
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let post_id = self.post_id;
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let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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let community_id = post.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let mut like = Like::new(creator.actor_id.to_owned(), note.into_any_base()?);
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like
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(DislikeType::Dislike)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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// Undo that fake activity
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let mut undo = Undo::new(creator.actor_id.to_owned(), like.into_any_base()?);
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undo
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(UndoType::Undo)?)
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.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
send_activity_to_community(
|
|
&creator,
|
|
&community,
|
|
vec![community.get_shared_inbox_url()?],
|
|
undo,
|
|
context,
|
|
)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
struct MentionsAndAddresses {
|
|
addressed_ccs: Vec<Url>,
|
|
inboxes: Vec<Url>,
|
|
tags: Vec<Mention>,
|
|
}
|
|
|
|
impl MentionsAndAddresses {
|
|
fn get_tags(&self) -> Result<Vec<AnyBase>, Error> {
|
|
self
|
|
.tags
|
|
.iter()
|
|
.map(|t| t.to_owned().into_any_base())
|
|
.collect::<Result<Vec<AnyBase>, Error>>()
|
|
}
|
|
}
|
|
|
|
/// This takes a comment, and builds a list of to_addresses, inboxes,
|
|
/// and mention tags, so they know where to be sent to.
|
|
/// Addresses are the users / addresses that go in the cc field.
|
|
async fn collect_non_local_mentions_and_addresses(
|
|
content: &str,
|
|
community: &Community,
|
|
context: &LemmyContext,
|
|
) -> Result<MentionsAndAddresses, LemmyError> {
|
|
let mut addressed_ccs = vec![community.get_followers_url()?];
|
|
|
|
// Add the mention tag
|
|
let mut tags = Vec::new();
|
|
|
|
// Get the inboxes for any mentions
|
|
let mentions = scrape_text_for_mentions(&content)
|
|
.into_iter()
|
|
// Filter only the non-local ones
|
|
.filter(|m| !m.is_local())
|
|
.collect::<Vec<MentionData>>();
|
|
|
|
let mut mention_inboxes: Vec<Url> = Vec::new();
|
|
for mention in &mentions {
|
|
// TODO should it be fetching it every time?
|
|
if let Ok(actor_id) = fetch_webfinger_url(mention, context.client()).await {
|
|
debug!("mention actor_id: {}", actor_id);
|
|
addressed_ccs.push(actor_id.to_owned().to_string().parse()?);
|
|
|
|
let mention_user = get_or_fetch_and_upsert_user(&actor_id, context).await?;
|
|
let shared_inbox = mention_user.get_shared_inbox_url()?;
|
|
|
|
mention_inboxes.push(shared_inbox);
|
|
let mut mention_tag = Mention::new();
|
|
mention_tag.set_href(actor_id).set_name(mention.full_name());
|
|
tags.push(mention_tag);
|
|
}
|
|
}
|
|
|
|
let mut inboxes = vec![community.get_shared_inbox_url()?];
|
|
inboxes.extend(mention_inboxes);
|
|
inboxes = inboxes.into_iter().unique().collect();
|
|
|
|
Ok(MentionsAndAddresses {
|
|
addressed_ccs,
|
|
inboxes,
|
|
tags,
|
|
})
|
|
}
|