crates/apub/src/activities/deletion/undo_delete.rs

   1 use crate::{
   2   activities::{
   3     community::announce::GetCommunity,
   4     deletion::{receive_delete_action, verify_delete_activity, DeletableObjects},
   5     generate_activity_id,
   6   },
   7   local_instance,
   8   objects::{community::ApubCommunity, person::ApubPerson},
   9   protocol::activities::deletion::{delete::Delete, undo_delete::UndoDelete},
  10 };
  11 use activitypub_federation::{core::object_id::ObjectId, data::Data, traits::ActivityHandler};
  12 use activitystreams_kinds::activity::UndoType;
  13 use lemmy_db_schema::{
  14   source::{
  15     comment::{Comment, CommentUpdateForm},
  16     community::{Community, CommunityUpdateForm},
  17     moderator::{
  18       ModRemoveComment,
  19       ModRemoveCommentForm,
  20       ModRemoveCommunity,
  21       ModRemoveCommunityForm,
  22       ModRemovePost,
  23       ModRemovePostForm,
  24     },
  25     post::{Post, PostUpdateForm},
  26   },
  27   traits::Crud,
  28 };
  29 use lemmy_utils::error::LemmyError;
  30 use lemmy_websocket::{
  31   send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
  32   LemmyContext,
  33   UserOperationCrud,
  34 };
  35 use url::Url;
  36
  37 #[async_trait::async_trait(?Send)]
  38 impl ActivityHandler for UndoDelete {
  39   type DataType = LemmyContext;
  40   type Error = LemmyError;
  41
  42   fn id(&self) -> &Url {
  43     &self.id
  44   }
  45
  46   fn actor(&self) -> &Url {
  47     self.actor.inner()
  48   }
  49
  50   #[tracing::instrument(skip_all)]
  51   async fn verify(
  52     &self,
  53     context: &Data<LemmyContext>,
  54     request_counter: &mut i32,
  55   ) -> Result<(), LemmyError> {
  56     self.object.verify(context, request_counter).await?;
  57     verify_delete_activity(
  58       &self.object,
  59       self.object.summary.is_some(),
  60       context,
  61       request_counter,
  62     )
  63     .await?;
  64     Ok(())
  65   }
  66
  67   #[tracing::instrument(skip_all)]
  68   async fn receive(
  69     self,
  70     context: &Data<LemmyContext>,
  71     request_counter: &mut i32,
  72   ) -> Result<(), LemmyError> {
  73     if self.object.summary.is_some() {
  74       UndoDelete::receive_undo_remove_action(
  75         &self
  76           .actor
  77           .dereference(context, local_instance(context).await, request_counter)
  78           .await?,
  79         self.object.object.id(),
  80         context,
  81       )
  82       .await
  83     } else {
  84       receive_delete_action(
  85         self.object.object.id(),
  86         &self.actor,
  87         false,
  88         context,
  89         request_counter,
  90       )
  91       .await
  92     }
  93   }
  94 }
  95
  96 impl UndoDelete {
  97   #[tracing::instrument(skip_all)]
  98   pub(in crate::activities::deletion) fn new(
  99     actor: &ApubPerson,
 100     object: DeletableObjects,
 101     to: Url,
 102     community: Option<&Community>,
 103     summary: Option<String>,
 104     context: &LemmyContext,
 105   ) -> Result<UndoDelete, LemmyError> {
 106     let object = Delete::new(actor, object, to.clone(), community, summary, context)?;
 107
 108     let id = generate_activity_id(
 109       UndoType::Undo,
 110       &context.settings().get_protocol_and_hostname(),
 111     )?;
 112     let cc: Option<Url> = community.map(|c| c.actor_id.clone().into());
 113     Ok(UndoDelete {
 114       actor: ObjectId::new(actor.actor_id.clone()),
 115       to: vec![to],
 116       object,
 117       cc: cc.into_iter().collect(),
 118       kind: UndoType::Undo,
 119       id,
 120     })
 121   }
 122
 123   #[tracing::instrument(skip_all)]
 124   pub(in crate::activities) async fn receive_undo_remove_action(
 125     actor: &ApubPerson,
 126     object: &Url,
 127     context: &LemmyContext,
 128   ) -> Result<(), LemmyError> {
 129     use UserOperationCrud::*;
 130     match DeletableObjects::read_from_db(object, context).await? {
 131       DeletableObjects::Community(community) => {
 132         if community.local {
 133           return Err(LemmyError::from_message(
 134             "Only local admin can restore community",
 135           ));
 136         }
 137         let form = ModRemoveCommunityForm {
 138           mod_person_id: actor.id,
 139           community_id: community.id,
 140           removed: Some(false),
 141           reason: None,
 142           expires: None,
 143         };
 144         ModRemoveCommunity::create(context.pool(), &form).await?;
 145         let deleted_community = Community::update(
 146           context.pool(),
 147           community.id,
 148           &CommunityUpdateForm::builder().removed(Some(false)).build(),
 149         )
 150         .await?;
 151         send_community_ws_message(deleted_community.id, EditCommunity, None, None, context).await?;
 152       }
 153       DeletableObjects::Post(post) => {
 154         let form = ModRemovePostForm {
 155           mod_person_id: actor.id,
 156           post_id: post.id,
 157           removed: Some(false),
 158           reason: None,
 159         };
 160         ModRemovePost::create(context.pool(), &form).await?;
 161         let removed_post = Post::update(
 162           context.pool(),
 163           post.id,
 164           &PostUpdateForm::builder().removed(Some(false)).build(),
 165         )
 166         .await?;
 167         send_post_ws_message(removed_post.id, EditPost, None, None, context).await?;
 168       }
 169       DeletableObjects::Comment(comment) => {
 170         let form = ModRemoveCommentForm {
 171           mod_person_id: actor.id,
 172           comment_id: comment.id,
 173           removed: Some(false),
 174           reason: None,
 175         };
 176         ModRemoveComment::create(context.pool(), &form).await?;
 177         let removed_comment = Comment::update(
 178           context.pool(),
 179           comment.id,
 180           &CommentUpdateForm::builder().removed(Some(false)).build(),
 181         )
 182         .await?;
 183         send_comment_ws_message_simple(removed_comment.id, EditComment, context).await?;
 184       }
 185       DeletableObjects::PrivateMessage(_) => unimplemented!(),
 186     }
 187     Ok(())
 188   }
 189 }
 190
 191 #[async_trait::async_trait(?Send)]
 192 impl GetCommunity for UndoDelete {
 193   #[tracing::instrument(skip_all)]
 194   async fn get_community(
 195     &self,
 196     context: &LemmyContext,
 197     request_counter: &mut i32,
 198   ) -> Result<ApubCommunity, LemmyError> {
 199     self.object.get_community(context, request_counter).await
 200   }
 201 }