crates/apub/src/activities/deletion/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     verify_activity,
   7   },
   8   objects::{community::ApubCommunity, person::ApubPerson},
   9   protocol::activities::deletion::delete::{Delete, IdOrNestedObject, NestedObject},
  10 };
  11 use activitystreams_kinds::activity::DeleteType;
  12 use anyhow::anyhow;
  13 use lemmy_api_common::blocking;
  14 use lemmy_apub_lib::{data::Data, object_id::ObjectId, traits::ActivityHandler};
  15 use lemmy_db_schema::{
  16   source::{
  17     comment::Comment,
  18     community::Community,
  19     moderator::{
  20       ModRemoveComment,
  21       ModRemoveCommentForm,
  22       ModRemoveCommunity,
  23       ModRemoveCommunityForm,
  24       ModRemovePost,
  25       ModRemovePostForm,
  26     },
  27     person::Person,
  28     post::Post,
  29   },
  30   traits::Crud,
  31 };
  32 use lemmy_utils::LemmyError;
  33 use lemmy_websocket::{
  34   send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
  35   LemmyContext,
  36   UserOperationCrud,
  37 };
  38 use url::Url;
  39
  40 #[async_trait::async_trait(?Send)]
  41 impl ActivityHandler for Delete {
  42   type DataType = LemmyContext;
  43
  44   #[tracing::instrument(skip_all)]
  45   async fn verify(
  46     &self,
  47     context: &Data<LemmyContext>,
  48     request_counter: &mut i32,
  49   ) -> Result<(), LemmyError> {
  50     verify_activity(&self.id, self.actor.inner(), &context.settings())?;
  51     verify_delete_activity(self, self.summary.is_some(), context, request_counter).await?;
  52     Ok(())
  53   }
  54
  55   #[tracing::instrument(skip_all)]
  56   async fn receive(
  57     self,
  58     context: &Data<LemmyContext>,
  59     request_counter: &mut i32,
  60   ) -> Result<(), LemmyError> {
  61     if let Some(reason) = self.summary {
  62       // We set reason to empty string if it doesn't exist, to distinguish between delete and
  63       // remove. Here we change it back to option, so we don't write it to db.
  64       let reason = if reason.is_empty() {
  65         None
  66       } else {
  67         Some(reason)
  68       };
  69       receive_remove_action(
  70         &self.actor,
  71         self.object.id(),
  72         reason,
  73         context,
  74         request_counter,
  75       )
  76       .await
  77     } else {
  78       receive_delete_action(
  79         self.object.id(),
  80         &self.actor,
  81         true,
  82         context,
  83         request_counter,
  84       )
  85       .await
  86     }
  87   }
  88 }
  89
  90 impl Delete {
  91   pub(in crate::activities::deletion) fn new(
  92     actor: &Person,
  93     object: DeletableObjects,
  94     to: Url,
  95     community: Option<&Community>,
  96     summary: Option<String>,
  97     context: &LemmyContext,
  98   ) -> Result<Delete, LemmyError> {
  99     let id = generate_activity_id(
 100       DeleteType::Delete,
 101       &context.settings().get_protocol_and_hostname(),
 102     )?;
 103     let cc: Option<Url> = community.map(|c| c.actor_id.clone().into());
 104     Ok(Delete {
 105       actor: ObjectId::new(actor.actor_id.clone()),
 106       to: vec![to],
 107       object: IdOrNestedObject::NestedObject(NestedObject {
 108         id: object.id(),
 109         kind: Default::default(),
 110       }),
 111       cc: cc.into_iter().collect(),
 112       kind: DeleteType::Delete,
 113       summary,
 114       id,
 115       unparsed: Default::default(),
 116     })
 117   }
 118 }
 119
 120 #[tracing::instrument(skip_all)]
 121 pub(in crate::activities) async fn receive_remove_action(
 122   actor: &ObjectId<ApubPerson>,
 123   object: &Url,
 124   reason: Option<String>,
 125   context: &LemmyContext,
 126   request_counter: &mut i32,
 127 ) -> Result<(), LemmyError> {
 128   let actor = actor
 129     .dereference(context, context.client(), request_counter)
 130     .await?;
 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 remove community",
 137         ));
 138       }
 139       let form = ModRemoveCommunityForm {
 140         mod_person_id: actor.id,
 141         community_id: community.id,
 142         removed: Some(true),
 143         reason,
 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, true)
 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       blocking(context.pool(), move |conn| {
 165         ModRemovePost::create(conn, &form)
 166       })
 167       .await??;
 168       let removed_post = blocking(context.pool(), move |conn| {
 169         Post::update_removed(conn, post.id, true)
 170       })
 171       .await??;
 172
 173       send_post_ws_message(removed_post.id, RemovePost, None, None, context).await?;
 174     }
 175     DeletableObjects::Comment(comment) => {
 176       let form = ModRemoveCommentForm {
 177         mod_person_id: actor.id,
 178         comment_id: comment.id,
 179         removed: Some(true),
 180         reason,
 181       };
 182       blocking(context.pool(), move |conn| {
 183         ModRemoveComment::create(conn, &form)
 184       })
 185       .await??;
 186       let removed_comment = blocking(context.pool(), move |conn| {
 187         Comment::update_removed(conn, comment.id, true)
 188       })
 189       .await??;
 190
 191       send_comment_ws_message_simple(removed_comment.id, RemoveComment, context).await?;
 192     }
 193     DeletableObjects::PrivateMessage(_) => unimplemented!(),
 194   }
 195   Ok(())
 196 }
 197
 198 #[async_trait::async_trait(?Send)]
 199 impl GetCommunity for Delete {
 200   #[tracing::instrument(skip_all)]
 201   async fn get_community(
 202     &self,
 203     context: &LemmyContext,
 204     _request_counter: &mut i32,
 205   ) -> Result<ApubCommunity, LemmyError> {
 206     let community_id = match DeletableObjects::read_from_db(self.object.id(), context).await? {
 207       DeletableObjects::Community(c) => c.id,
 208       DeletableObjects::Comment(c) => {
 209         let post = blocking(context.pool(), move |conn| Post::read(conn, c.post_id)).await??;
 210         post.community_id
 211       }
 212       DeletableObjects::Post(p) => p.community_id,
 213       DeletableObjects::PrivateMessage(_) => {
 214         return Err(anyhow!("Private message is not part of community").into())
 215       }
 216     };
 217     let community = blocking(context.pool(), move |conn| {
 218       Community::read(conn, community_id)
 219     })
 220     .await??;
 221     Ok(community.into())
 222   }
 223 }