crates/apub/src/activities/deletion/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, IdOrNestedObject},
   9 };
  10 use activitypub_federation::{core::object_id::ObjectId, data::Data, traits::ActivityHandler};
  11 use activitystreams_kinds::activity::DeleteType;
  12 use lemmy_api_common::{
  13   websocket::{
  14     send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
  15     UserOperationCrud,
  16   },
  17   LemmyContext,
  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 Delete {
  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     verify_delete_activity(self, self.summary.is_some(), context, request_counter).await?;
  58     Ok(())
  59   }
  60
  61   #[tracing::instrument(skip_all)]
  62   async fn receive(
  63     self,
  64     context: &Data<LemmyContext>,
  65     request_counter: &mut i32,
  66   ) -> Result<(), LemmyError> {
  67     if let Some(reason) = self.summary {
  68       // We set reason to empty string if it doesn't exist, to distinguish between delete and
  69       // remove. Here we change it back to option, so we don't write it to db.
  70       let reason = if reason.is_empty() {
  71         None
  72       } else {
  73         Some(reason)
  74       };
  75       receive_remove_action(
  76         &self
  77           .actor
  78           .dereference(context, local_instance(context).await, request_counter)
  79           .await?,
  80         self.object.id(),
  81         reason,
  82         context,
  83       )
  84       .await
  85     } else {
  86       receive_delete_action(
  87         self.object.id(),
  88         &self.actor,
  89         true,
  90         context,
  91         request_counter,
  92       )
  93       .await
  94     }
  95   }
  96 }
  97
  98 impl Delete {
  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<Delete, LemmyError> {
 107     let id = generate_activity_id(
 108       DeleteType::Delete,
 109       &context.settings().get_protocol_and_hostname(),
 110     )?;
 111     let cc: Option<Url> = community.map(|c| c.actor_id.clone().into());
 112     Ok(Delete {
 113       actor: ObjectId::new(actor.actor_id.clone()),
 114       to: vec![to],
 115       object: IdOrNestedObject::Id(object.id()),
 116       cc: cc.into_iter().collect(),
 117       kind: DeleteType::Delete,
 118       summary,
 119       id,
 120       audience: community.map(|c| ObjectId::<ApubCommunity>::new(c.actor_id.clone())),
 121     })
 122   }
 123 }
 124
 125 #[tracing::instrument(skip_all)]
 126 pub(in crate::activities) async fn receive_remove_action(
 127   actor: &ApubPerson,
 128   object: &Url,
 129   reason: Option<String>,
 130   context: &LemmyContext,
 131 ) -> Result<(), LemmyError> {
 132   use UserOperationCrud::*;
 133   match DeletableObjects::read_from_db(object, context).await? {
 134     DeletableObjects::Community(community) => {
 135       if community.local {
 136         return Err(LemmyError::from_message(
 137           "Only local admin can remove community",
 138         ));
 139       }
 140       let form = ModRemoveCommunityForm {
 141         mod_person_id: actor.id,
 142         community_id: community.id,
 143         removed: Some(true),
 144         reason,
 145         expires: None,
 146       };
 147       ModRemoveCommunity::create(context.pool(), &form).await?;
 148       let deleted_community = Community::update(
 149         context.pool(),
 150         community.id,
 151         &CommunityUpdateForm::builder().removed(Some(true)).build(),
 152       )
 153       .await?;
 154
 155       send_community_ws_message(deleted_community.id, RemoveCommunity, None, None, context).await?;
 156     }
 157     DeletableObjects::Post(post) => {
 158       let form = ModRemovePostForm {
 159         mod_person_id: actor.id,
 160         post_id: post.id,
 161         removed: Some(true),
 162         reason,
 163       };
 164       ModRemovePost::create(context.pool(), &form).await?;
 165       let removed_post = Post::update(
 166         context.pool(),
 167         post.id,
 168         &PostUpdateForm::builder().removed(Some(true)).build(),
 169       )
 170       .await?;
 171
 172       send_post_ws_message(removed_post.id, RemovePost, None, None, context).await?;
 173     }
 174     DeletableObjects::Comment(comment) => {
 175       let form = ModRemoveCommentForm {
 176         mod_person_id: actor.id,
 177         comment_id: comment.id,
 178         removed: Some(true),
 179         reason,
 180       };
 181       ModRemoveComment::create(context.pool(), &form).await?;
 182       let removed_comment = Comment::update(
 183         context.pool(),
 184         comment.id,
 185         &CommentUpdateForm::builder().removed(Some(true)).build(),
 186       )
 187       .await?;
 188
 189       send_comment_ws_message_simple(removed_comment.id, RemoveComment, context).await?;
 190     }
 191     DeletableObjects::PrivateMessage(_) => unimplemented!(),
 192   }
 193   Ok(())
 194 }