crates/apub/src/protocol/activities/deletion/delete.rs

   1 use crate::{
   2   activities::{deletion::DeletableObjects, verify_community_matches},
   3   local_instance,
   4   objects::{community::ApubCommunity, person::ApubPerson},
   5   protocol::{objects::tombstone::Tombstone, IdOrNestedObject, InCommunity},
   6 };
   7 use activitypub_federation::{core::object_id::ObjectId, deser::helpers::deserialize_one_or_many};
   8 use activitystreams_kinds::activity::DeleteType;
   9 use anyhow::anyhow;
  10 use lemmy_api_common::context::LemmyContext;
  11 use lemmy_db_schema::{
  12   source::{community::Community, post::Post},
  13   traits::Crud,
  14 };
  15 use lemmy_utils::error::LemmyError;
  16 use serde::{Deserialize, Serialize};
  17 use serde_with::skip_serializing_none;
  18 use url::Url;
  19
  20 #[skip_serializing_none]
  21 #[derive(Clone, Debug, Deserialize, Serialize)]
  22 #[serde(rename_all = "camelCase")]
  23 pub struct Delete {
  24   pub(crate) actor: ObjectId<ApubPerson>,
  25   #[serde(deserialize_with = "deserialize_one_or_many")]
  26   pub(crate) to: Vec<Url>,
  27   pub(crate) object: IdOrNestedObject<Tombstone>,
  28   #[serde(rename = "type")]
  29   pub(crate) kind: DeleteType,
  30   pub(crate) id: Url,
  31   pub(crate) audience: Option<ObjectId<ApubCommunity>>,
  32
  33   #[serde(deserialize_with = "deserialize_one_or_many")]
  34   #[serde(default)]
  35   #[serde(skip_serializing_if = "Vec::is_empty")]
  36   pub(crate) cc: Vec<Url>,
  37   /// If summary is present, this is a mod action (Remove in Lemmy terms). Otherwise, its a user
  38   /// deleting their own content.
  39   pub(crate) summary: Option<String>,
  40 }
  41
  42 #[async_trait::async_trait(?Send)]
  43 impl InCommunity for Delete {
  44   async fn community(
  45     &self,
  46     context: &LemmyContext,
  47     request_counter: &mut i32,
  48   ) -> Result<ApubCommunity, LemmyError> {
  49     let community_id = match DeletableObjects::read_from_db(self.object.id(), context).await? {
  50       DeletableObjects::Community(c) => c.id,
  51       DeletableObjects::Comment(c) => {
  52         let post = Post::read(context.pool(), c.post_id).await?;
  53         post.community_id
  54       }
  55       DeletableObjects::Post(p) => p.community_id,
  56       DeletableObjects::PrivateMessage(_) => {
  57         return Err(anyhow!("Private message is not part of community").into())
  58       }
  59     };
  60     if let Some(audience) = &self.audience {
  61       let audience = audience
  62         .dereference(context, local_instance(context).await, request_counter)
  63         .await?;
  64       verify_community_matches(&audience, community_id)?;
  65       Ok(audience)
  66     } else {
  67       let community = Community::read(context.pool(), community_id).await?;
  68       Ok(community.into())
  69     }
  70   }
  71 }