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

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