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   insert_activity,
   7   objects::person::ApubPerson,
   8   protocol::{activities::deletion::delete::Delete, IdOrNestedObject},
   9 };
  10 use activitypub_federation::{config::Data, kinds::activity::DeleteType, traits::ActivityHandler};
  11 use lemmy_api_common::{
  12   context::LemmyContext,
  13   websocket::{
  14     send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
  15     UserOperationCrud,
  16   },
  17 };
  18 use lemmy_db_schema::{
  19   source::{
  20     comment::{Comment, CommentUpdateForm},
  21     community::{Community, CommunityUpdateForm},
  22     moderator::{
  23       ModRemoveComment,
  24       ModRemoveCommentForm,
  25       ModRemoveCommunity,
  26       ModRemoveCommunityForm,
  27       ModRemovePost,
  28       ModRemovePostForm,
  29     },
  30     post::{Post, PostUpdateForm},
  31   },
  32   traits::Crud,
  33 };
  34 use lemmy_utils::error::LemmyError;
  35 use url::Url;
  36
  37 #[async_trait::async_trait]
  38 impl ActivityHandler for Delete {
  39   type DataType = LemmyContext;
  40   type Error = LemmyError;
  41
  42   fn id(&self) -> &Url {
  43     &self.id
  44   }
  45
  46   fn actor(&self) -> &Url {
  47     self.actor.inner()
  48   }
  49
  50   #[tracing::instrument(skip_all)]
  51   async fn verify(&self, context: &Data<Self::DataType>) -> Result<(), LemmyError> {
  52     verify_delete_activity(self, self.summary.is_some(), context).await?;
  53     Ok(())
  54   }
  55
  56   #[tracing::instrument(skip_all)]
  57   async fn receive(self, context: &Data<LemmyContext>) -> Result<(), LemmyError> {
  58     insert_activity(&self.id, &self, false, false, context).await?;
  59     if let Some(reason) = self.summary {
  60       // We set reason to empty string if it doesn't exist, to distinguish between delete and
  61       // remove. Here we change it back to option, so we don't write it to db.
  62       let reason = if reason.is_empty() {
  63         None
  64       } else {
  65         Some(reason)
  66       };
  67       receive_remove_action(
  68         &self.actor.dereference(context).await?,
  69         self.object.id(),
  70         reason,
  71         context,
  72       )
  73       .await
  74     } else {
  75       receive_delete_action(self.object.id(), &self.actor, true, context).await
  76     }
  77   }
  78 }
  79
  80 impl Delete {
  81   pub(in crate::activities::deletion) fn new(
  82     actor: &ApubPerson,
  83     object: DeletableObjects,
  84     to: Url,
  85     community: Option<&Community>,
  86     summary: Option<String>,
  87     context: &Data<LemmyContext>,
  88   ) -> Result<Delete, LemmyError> {
  89     let id = generate_activity_id(
  90       DeleteType::Delete,
  91       &context.settings().get_protocol_and_hostname(),
  92     )?;
  93     let cc: Option<Url> = community.map(|c| c.actor_id.clone().into());
  94     Ok(Delete {
  95       actor: actor.actor_id.clone().into(),
  96       to: vec![to],
  97       object: IdOrNestedObject::Id(object.id()),
  98       cc: cc.into_iter().collect(),
  99       kind: DeleteType::Delete,
 100       summary,
 101       id,
 102       audience: community.map(|c| c.actor_id.clone().into()),
 103     })
 104   }
 105 }
 106
 107 #[tracing::instrument(skip_all)]
 108 pub(in crate::activities) async fn receive_remove_action(
 109   actor: &ApubPerson,
 110   object: &Url,
 111   reason: Option<String>,
 112   context: &Data<LemmyContext>,
 113 ) -> Result<(), LemmyError> {
 114   use UserOperationCrud::*;
 115   match DeletableObjects::read_from_db(object, context).await? {
 116     DeletableObjects::Community(community) => {
 117       if community.local {
 118         return Err(LemmyError::from_message(
 119           "Only local admin can remove community",
 120         ));
 121       }
 122       let form = ModRemoveCommunityForm {
 123         mod_person_id: actor.id,
 124         community_id: community.id,
 125         removed: Some(true),
 126         reason,
 127         expires: None,
 128       };
 129       ModRemoveCommunity::create(context.pool(), &form).await?;
 130       let deleted_community = Community::update(
 131         context.pool(),
 132         community.id,
 133         &CommunityUpdateForm::builder().removed(Some(true)).build(),
 134       )
 135       .await?;
 136
 137       send_community_ws_message(deleted_community.id, RemoveCommunity, None, None, context).await?;
 138     }
 139     DeletableObjects::Post(post) => {
 140       let form = ModRemovePostForm {
 141         mod_person_id: actor.id,
 142         post_id: post.id,
 143         removed: Some(true),
 144         reason,
 145       };
 146       ModRemovePost::create(context.pool(), &form).await?;
 147       let removed_post = Post::update(
 148         context.pool(),
 149         post.id,
 150         &PostUpdateForm::builder().removed(Some(true)).build(),
 151       )
 152       .await?;
 153
 154       send_post_ws_message(removed_post.id, RemovePost, None, None, context).await?;
 155     }
 156     DeletableObjects::Comment(comment) => {
 157       let form = ModRemoveCommentForm {
 158         mod_person_id: actor.id,
 159         comment_id: comment.id,
 160         removed: Some(true),
 161         reason,
 162       };
 163       ModRemoveComment::create(context.pool(), &form).await?;
 164       let removed_comment = Comment::update(
 165         context.pool(),
 166         comment.id,
 167         &CommentUpdateForm::builder().removed(Some(true)).build(),
 168       )
 169       .await?;
 170
 171       send_comment_ws_message_simple(removed_comment.id, RemoveComment, context).await?;
 172     }
 173     DeletableObjects::PrivateMessage(_) => unimplemented!(),
 174   }
 175   Ok(())
 176 }