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::{
  10     activities::deletion::delete::Delete,
  11     objects::tombstone::Tombstone,
  12     IdOrNestedObject,
  13   },
  14 };
  15 use activitystreams_kinds::activity::DeleteType;
  16 use anyhow::anyhow;
  17 use lemmy_api_common::utils::blocking;
  18 use lemmy_apub_lib::{data::Data, object_id::ObjectId, traits::ActivityHandler};
  19 use lemmy_db_schema::{
  20   source::{
  21     comment::Comment,
  22     community::Community,
  23     moderator::{
  24       ModRemoveComment,
  25       ModRemoveCommentForm,
  26       ModRemoveCommunity,
  27       ModRemoveCommunityForm,
  28       ModRemovePost,
  29       ModRemovePostForm,
  30     },
  31     person::Person,
  32     post::Post,
  33   },
  34   traits::Crud,
  35 };
  36 use lemmy_utils::LemmyError;
  37 use lemmy_websocket::{
  38   send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
  39   LemmyContext,
  40   UserOperationCrud,
  41 };
  42 use url::Url;
  43
  44 #[async_trait::async_trait(?Send)]
  45 impl ActivityHandler for Delete {
  46   type DataType = LemmyContext;
  47
  48   #[tracing::instrument(skip_all)]
  49   async fn verify(
  50     &self,
  51     context: &Data<LemmyContext>,
  52     request_counter: &mut i32,
  53   ) -> Result<(), LemmyError> {
  54     verify_activity(&self.id, self.actor.inner(), &context.settings())?;
  55     verify_delete_activity(self, self.summary.is_some(), context, request_counter).await?;
  56     Ok(())
  57   }
  58
  59   #[tracing::instrument(skip_all)]
  60   async fn receive(
  61     self,
  62     context: &Data<LemmyContext>,
  63     request_counter: &mut i32,
  64   ) -> Result<(), LemmyError> {
  65     if let Some(reason) = self.summary {
  66       // We set reason to empty string if it doesn't exist, to distinguish between delete and
  67       // remove. Here we change it back to option, so we don't write it to db.
  68       let reason = if reason.is_empty() {
  69         None
  70       } else {
  71         Some(reason)
  72       };
  73       receive_remove_action(
  74         &self
  75           .actor
  76           .dereference(context, context.client(), request_counter)
  77           .await?,
  78         self.object.id(),
  79         reason,
  80         context,
  81       )
  82       .await
  83     } else {
  84       receive_delete_action(
  85         self.object.id(),
  86         &self.actor,
  87         true,
  88         context,
  89         request_counter,
  90       )
  91       .await
  92     }
  93   }
  94 }
  95
  96 impl Delete {
  97   pub(in crate::activities::deletion) fn new(
  98     actor: &Person,
  99     object: DeletableObjects,
 100     to: Url,
 101     community: Option<&Community>,
 102     summary: Option<String>,
 103     context: &LemmyContext,
 104   ) -> Result<Delete, LemmyError> {
 105     let id = generate_activity_id(
 106       DeleteType::Delete,
 107       &context.settings().get_protocol_and_hostname(),
 108     )?;
 109     let cc: Option<Url> = community.map(|c| c.actor_id.clone().into());
 110     Ok(Delete {
 111       actor: ObjectId::new(actor.actor_id.clone()),
 112       to: vec![to],
 113       object: IdOrNestedObject::NestedObject(Tombstone {
 114         id: object.id(),
 115         kind: Default::default(),
 116       }),
 117       cc: cc.into_iter().collect(),
 118       kind: DeleteType::Delete,
 119       summary,
 120       id,
 121       unparsed: Default::default(),
 122     })
 123   }
 124 }
 125
 126 #[tracing::instrument(skip_all)]
 127 pub(in crate::activities) async fn receive_remove_action(
 128   actor: &ApubPerson,
 129   object: &Url,
 130   reason: Option<String>,
 131   context: &LemmyContext,
 132 ) -> Result<(), LemmyError> {
 133   use UserOperationCrud::*;
 134   match DeletableObjects::read_from_db(object, context).await? {
 135     DeletableObjects::Community(community) => {
 136       if community.local {
 137         return Err(LemmyError::from_message(
 138           "Only local admin can remove community",
 139         ));
 140       }
 141       let form = ModRemoveCommunityForm {
 142         mod_person_id: actor.id,
 143         community_id: community.id,
 144         removed: Some(true),
 145         reason,
 146         expires: None,
 147       };
 148       blocking(context.pool(), move |conn| {
 149         ModRemoveCommunity::create(conn, &form)
 150       })
 151       .await??;
 152       let deleted_community = blocking(context.pool(), move |conn| {
 153         Community::update_removed(conn, community.id, true)
 154       })
 155       .await??;
 156
 157       send_community_ws_message(deleted_community.id, RemoveCommunity, None, None, context).await?;
 158     }
 159     DeletableObjects::Post(post) => {
 160       let form = ModRemovePostForm {
 161         mod_person_id: actor.id,
 162         post_id: post.id,
 163         removed: Some(true),
 164         reason,
 165       };
 166       blocking(context.pool(), move |conn| {
 167         ModRemovePost::create(conn, &form)
 168       })
 169       .await??;
 170       let removed_post = blocking(context.pool(), move |conn| {
 171         Post::update_removed(conn, post.id, true)
 172       })
 173       .await??;
 174
 175       send_post_ws_message(removed_post.id, RemovePost, None, None, context).await?;
 176     }
 177     DeletableObjects::Comment(comment) => {
 178       let form = ModRemoveCommentForm {
 179         mod_person_id: actor.id,
 180         comment_id: comment.id,
 181         removed: Some(true),
 182         reason,
 183       };
 184       blocking(context.pool(), move |conn| {
 185         ModRemoveComment::create(conn, &form)
 186       })
 187       .await??;
 188       let removed_comment = blocking(context.pool(), move |conn| {
 189         Comment::update_removed(conn, comment.id, true)
 190       })
 191       .await??;
 192
 193       send_comment_ws_message_simple(removed_comment.id, RemoveComment, context).await?;
 194     }
 195     DeletableObjects::PrivateMessage(_) => unimplemented!(),
 196   }
 197   Ok(())
 198 }
 199
 200 #[async_trait::async_trait(?Send)]
 201 impl GetCommunity for Delete {
 202   #[tracing::instrument(skip_all)]
 203   async fn get_community(
 204     &self,
 205     context: &LemmyContext,
 206     _request_counter: &mut i32,
 207   ) -> Result<ApubCommunity, LemmyError> {
 208     let community_id = match DeletableObjects::read_from_db(self.object.id(), context).await? {
 209       DeletableObjects::Community(c) => c.id,
 210       DeletableObjects::Comment(c) => {
 211         let post = blocking(context.pool(), move |conn| Post::read(conn, c.post_id)).await??;
 212         post.community_id
 213       }
 214       DeletableObjects::Post(p) => p.community_id,
 215       DeletableObjects::PrivateMessage(_) => {
 216         return Err(anyhow!("Private message is not part of community").into())
 217       }
 218     };
 219     let community = blocking(context.pool(), move |conn| {
 220       Community::read(conn, community_id)
 221     })
 222     .await??;
 223     Ok(community.into())
 224   }
 225 }