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_received_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, LemmyErrorType};
  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     insert_received_activity(&self.id, data).await?;
  46     self.object.verify(data).await?;
  47     verify_delete_activity(&self.object, self.object.summary.is_some(), data).await?;
  48     Ok(())
  49   }
  50
  51   #[tracing::instrument(skip_all)]
  52   async fn receive(self, context: &Data<LemmyContext>) -> Result<(), LemmyError> {
  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(LemmyErrorType::OnlyLocalAdminCanRestoreCommunity)?;
 104         }
 105         let form = ModRemoveCommunityForm {
 106           mod_person_id: actor.id,
 107           community_id: community.id,
 108           removed: Some(false),
 109           reason: None,
 110           expires: None,
 111         };
 112         ModRemoveCommunity::create(&mut context.pool(), &form).await?;
 113         Community::update(
 114           &mut context.pool(),
 115           community.id,
 116           &CommunityUpdateForm {
 117             removed: Some(false),
 118             ..Default::default()
 119           },
 120         )
 121         .await?;
 122       }
 123       DeletableObjects::Post(post) => {
 124         let form = ModRemovePostForm {
 125           mod_person_id: actor.id,
 126           post_id: post.id,
 127           removed: Some(false),
 128           reason: None,
 129         };
 130         ModRemovePost::create(&mut context.pool(), &form).await?;
 131         Post::update(
 132           &mut context.pool(),
 133           post.id,
 134           &PostUpdateForm {
 135             removed: Some(false),
 136             ..Default::default()
 137           },
 138         )
 139         .await?;
 140       }
 141       DeletableObjects::Comment(comment) => {
 142         let form = ModRemoveCommentForm {
 143           mod_person_id: actor.id,
 144           comment_id: comment.id,
 145           removed: Some(false),
 146           reason: None,
 147         };
 148         ModRemoveComment::create(&mut context.pool(), &form).await?;
 149         Comment::update(
 150           &mut context.pool(),
 151           comment.id,
 152           &CommentUpdateForm {
 153             removed: Some(false),
 154             ..Default::default()
 155           },
 156         )
 157         .await?;
 158       }
 159       DeletableObjects::PrivateMessage(_) => unimplemented!(),
 160     }
 161     Ok(())
 162   }
 163 }