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