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_api_common::utils::blocking;
  14 use lemmy_db_schema::{
  15   source::{
  16     comment::Comment,
  17     community::Community,
  18     moderator::{
  19       ModRemoveComment,
  20       ModRemoveCommentForm,
  21       ModRemoveCommunity,
  22       ModRemoveCommunityForm,
  23       ModRemovePost,
  24       ModRemovePostForm,
  25     },
  26     post::Post,
  27   },
  28   traits::Crud,
  29 };
  30 use lemmy_utils::error::LemmyError;
  31 use lemmy_websocket::{
  32   send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
  33   LemmyContext,
  34   UserOperationCrud,
  35 };
  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), 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       unparsed: Default::default(),
 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         blocking(context.pool(), move |conn| {
 147           ModRemoveCommunity::create(conn, &form)
 148         })
 149         .await??;
 150         let deleted_community = blocking(context.pool(), move |conn| {
 151           Community::update_removed(conn, community.id, false)
 152         })
 153         .await??;
 154         send_community_ws_message(deleted_community.id, EditCommunity, None, None, context).await?;
 155       }
 156       DeletableObjects::Post(post) => {
 157         let form = ModRemovePostForm {
 158           mod_person_id: actor.id,
 159           post_id: post.id,
 160           removed: Some(false),
 161           reason: None,
 162         };
 163         blocking(context.pool(), move |conn| {
 164           ModRemovePost::create(conn, &form)
 165         })
 166         .await??;
 167         let removed_post = blocking(context.pool(), move |conn| {
 168           Post::update_removed(conn, post.id, false)
 169         })
 170         .await??;
 171         send_post_ws_message(removed_post.id, EditPost, None, None, context).await?;
 172       }
 173       DeletableObjects::Comment(comment) => {
 174         let form = ModRemoveCommentForm {
 175           mod_person_id: actor.id,
 176           comment_id: comment.id,
 177           removed: Some(false),
 178           reason: None,
 179         };
 180         blocking(context.pool(), move |conn| {
 181           ModRemoveComment::create(conn, &form)
 182         })
 183         .await??;
 184         let removed_comment = blocking(context.pool(), move |conn| {
 185           Comment::update_removed(conn, comment.id, false)
 186         })
 187         .await??;
 188         send_comment_ws_message_simple(removed_comment.id, EditComment, context).await?;
 189       }
 190       DeletableObjects::PrivateMessage(_) => unimplemented!(),
 191     }
 192     Ok(())
 193   }
 194 }
 195
 196 #[async_trait::async_trait(?Send)]
 197 impl GetCommunity for UndoDelete {
 198   #[tracing::instrument(skip_all)]
 199   async fn get_community(
 200     &self,
 201     context: &LemmyContext,
 202     request_counter: &mut i32,
 203   ) -> Result<ApubCommunity, LemmyError> {
 204     self.object.get_community(context, request_counter).await
 205   }
 206 }