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
  71           .actor
  72           .dereference(context, context.client(), request_counter)
  73           .await?,
  74         self.object.id(),
  75         reason,
  76         context,
  77       )
  78       .await
  79     } else {
  80       receive_delete_action(
  81         self.object.id(),
  82         &self.actor,
  83         true,
  84         context,
  85         request_counter,
  86       )
  87       .await
  88     }
  89   }
  90 }
  91
  92 impl Delete {
  93   pub(in crate::activities::deletion) fn new(
  94     actor: &Person,
  95     object: DeletableObjects,
  96     to: Url,
  97     community: Option<&Community>,
  98     summary: Option<String>,
  99     context: &LemmyContext,
 100   ) -> Result<Delete, LemmyError> {
 101     let id = generate_activity_id(
 102       DeleteType::Delete,
 103       &context.settings().get_protocol_and_hostname(),
 104     )?;
 105     let cc: Option<Url> = community.map(|c| c.actor_id.clone().into());
 106     Ok(Delete {
 107       actor: ObjectId::new(actor.actor_id.clone()),
 108       to: vec![to],
 109       object: IdOrNestedObject::NestedObject(NestedObject {
 110         id: object.id(),
 111         kind: Default::default(),
 112       }),
 113       cc: cc.into_iter().collect(),
 114       kind: DeleteType::Delete,
 115       summary,
 116       id,
 117       unparsed: Default::default(),
 118     })
 119   }
 120 }
 121
 122 #[tracing::instrument(skip_all)]
 123 pub(in crate::activities) async fn receive_remove_action(
 124   actor: &ApubPerson,
 125   object: &Url,
 126   reason: Option<String>,
 127   context: &LemmyContext,
 128 ) -> Result<(), LemmyError> {
 129   use UserOperationCrud::*;
 130   match DeletableObjects::read_from_db(object, context).await? {
 131     DeletableObjects::Community(community) => {
 132       if community.local {
 133         return Err(LemmyError::from_message(
 134           "Only local admin can remove community",
 135         ));
 136       }
 137       let form = ModRemoveCommunityForm {
 138         mod_person_id: actor.id,
 139         community_id: community.id,
 140         removed: Some(true),
 141         reason,
 142         expires: None,
 143       };
 144       blocking(context.pool(), move |conn| {
 145         ModRemoveCommunity::create(conn, &form)
 146       })
 147       .await??;
 148       let deleted_community = blocking(context.pool(), move |conn| {
 149         Community::update_removed(conn, community.id, true)
 150       })
 151       .await??;
 152
 153       send_community_ws_message(deleted_community.id, RemoveCommunity, None, None, context).await?;
 154     }
 155     DeletableObjects::Post(post) => {
 156       let form = ModRemovePostForm {
 157         mod_person_id: actor.id,
 158         post_id: post.id,
 159         removed: Some(true),
 160         reason,
 161       };
 162       blocking(context.pool(), move |conn| {
 163         ModRemovePost::create(conn, &form)
 164       })
 165       .await??;
 166       let removed_post = blocking(context.pool(), move |conn| {
 167         Post::update_removed(conn, post.id, true)
 168       })
 169       .await??;
 170
 171       send_post_ws_message(removed_post.id, RemovePost, None, None, context).await?;
 172     }
 173     DeletableObjects::Comment(comment) => {
 174       let form = ModRemoveCommentForm {
 175         mod_person_id: actor.id,
 176         comment_id: comment.id,
 177         removed: Some(true),
 178         reason,
 179       };
 180       blocking(context.pool(), move |conn| {
 181         ModRemoveComment::create(conn, &form)
 182       })
 183       .await??;
 184       let removed_comment = blocking(context.pool(), move |conn| {
 185         Comment::update_removed(conn, comment.id, true)
 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 }
 195
 196 #[async_trait::async_trait(?Send)]
 197 impl GetCommunity for Delete {
 198   #[tracing::instrument(skip_all)]
 199   async fn get_community(
 200     &self,
 201     context: &LemmyContext,
 202     _request_counter: &mut i32,
 203   ) -> Result<ApubCommunity, LemmyError> {
 204     let community_id = match DeletableObjects::read_from_db(self.object.id(), context).await? {
 205       DeletableObjects::Community(c) => c.id,
 206       DeletableObjects::Comment(c) => {
 207         let post = blocking(context.pool(), move |conn| Post::read(conn, c.post_id)).await??;
 208         post.community_id
 209       }
 210       DeletableObjects::Post(p) => p.community_id,
 211       DeletableObjects::PrivateMessage(_) => {
 212         return Err(anyhow!("Private message is not part of community").into())
 213       }
 214     };
 215     let community = blocking(context.pool(), move |conn| {
 216       Community::read(conn, community_id)
 217     })
 218     .await??;
 219     Ok(community.into())
 220   }
 221 }