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