crates/apub/src/activities/deletion/delete.rs

   1 use crate::{
   2   activities::{
   3     community::{announce::GetCommunity, send_to_community},
   4     deletion::{
   5       receive_delete_action,
   6       verify_delete_activity,
   7       DeletableObjects,
   8     },
   9     generate_activity_id,
  10     verify_activity,
  11     verify_is_public,
  12   },
  13   activity_lists::AnnouncableActivities,
  14   fetcher::object_id::ObjectId,
  15   objects::{community::ApubCommunity, person::ApubPerson},
  16   protocol::activities::deletion::delete::Delete,
  17 };
  18 use activitystreams::{activity::kind::DeleteType, public};
  19 use anyhow::anyhow;
  20 use lemmy_api_common::blocking;
  21 use lemmy_apub_lib::{
  22   data::Data,
  23   traits::{ActivityHandler, ActorType},
  24 };
  25 use lemmy_db_schema::{
  26   source::{
  27     comment::Comment,
  28     community::Community,
  29     moderator::{
  30       ModRemoveComment,
  31       ModRemoveCommentForm,
  32       ModRemoveCommunity,
  33       ModRemoveCommunityForm,
  34       ModRemovePost,
  35       ModRemovePostForm,
  36     },
  37     post::Post,
  38   },
  39   traits::Crud,
  40 };
  41 use lemmy_utils::LemmyError;
  42 use lemmy_websocket::{
  43   send::{send_comment_ws_message_simple, send_community_ws_message, send_post_ws_message},
  44   LemmyContext,
  45   UserOperationCrud,
  46 };
  47 use url::Url;
  48
  49 #[async_trait::async_trait(?Send)]
  50 impl ActivityHandler for Delete {
  51   type DataType = LemmyContext;
  52   async fn verify(
  53     &self,
  54     context: &Data<LemmyContext>,
  55     request_counter: &mut i32,
  56   ) -> Result<(), LemmyError> {
  57     verify_is_public(&self.to)?;
  58     verify_activity(&self.id, self.actor.inner(), &context.settings())?;
  59     let community = self.get_community(context, request_counter).await?;
  60     verify_delete_activity(
  61       &self.object,
  62       &self.actor,
  63       &community,
  64       self.summary.is_some(),
  65       context,
  66       request_counter,
  67     )
  68     .await?;
  69     Ok(())
  70   }
  71
  72   async fn receive(
  73     self,
  74     context: &Data<LemmyContext>,
  75     request_counter: &mut i32,
  76   ) -> Result<(), LemmyError> {
  77     if let Some(reason) = self.summary {
  78       // We set reason to empty string if it doesn't exist, to distinguish between delete and
  79       // remove. Here we change it back to option, so we don't write it to db.
  80       let reason = if reason.is_empty() {
  81         None
  82       } else {
  83         Some(reason)
  84       };
  85       receive_remove_action(&self.actor, &self.object, reason, context, request_counter).await
  86     } else {
  87       receive_delete_action(&self.object, &self.actor, true, context, request_counter).await
  88     }
  89   }
  90 }
  91
  92 impl Delete {
  93   pub(in crate::activities::deletion) fn new(
  94     actor: &ApubPerson,
  95     community: &ApubCommunity,
  96     object_id: Url,
  97     summary: Option<String>,
  98     context: &LemmyContext,
  99   ) -> Result<Delete, LemmyError> {
 100     Ok(Delete {
 101       actor: ObjectId::new(actor.actor_id()),
 102       to: vec![public()],
 103       object: object_id,
 104       cc: vec![community.actor_id()],
 105       kind: DeleteType::Delete,
 106       summary,
 107       id: generate_activity_id(
 108         DeleteType::Delete,
 109         &context.settings().get_protocol_and_hostname(),
 110       )?,
 111       unparsed: Default::default(),
 112     })
 113   }
 114   pub(in crate::activities::deletion) async fn send(
 115     actor: &ApubPerson,
 116     community: &ApubCommunity,
 117     object_id: Url,
 118     summary: Option<String>,
 119     context: &LemmyContext,
 120   ) -> Result<(), LemmyError> {
 121     let delete = Delete::new(actor, community, object_id, summary, context)?;
 122     let delete_id = delete.id.clone();
 123
 124     let activity = AnnouncableActivities::Delete(delete);
 125     send_to_community(activity, &delete_id, actor, community, vec![], context).await
 126   }
 127 }
 128
 129 pub(in crate::activities) async fn receive_remove_action(
 130   actor: &ObjectId<ApubPerson>,
 131   object: &Url,
 132   reason: Option<String>,
 133   context: &LemmyContext,
 134   request_counter: &mut i32,
 135 ) -> Result<(), LemmyError> {
 136   let actor = actor.dereference(context, request_counter).await?;
 137   use UserOperationCrud::*;
 138   match DeletableObjects::read_from_db(object, context).await? {
 139     DeletableObjects::Community(community) => {
 140       if community.local {
 141         return Err(anyhow!("Only local admin can remove community").into());
 142       }
 143       let form = ModRemoveCommunityForm {
 144         mod_person_id: actor.id,
 145         community_id: community.id,
 146         removed: Some(true),
 147         reason,
 148         expires: None,
 149       };
 150       blocking(context.pool(), move |conn| {
 151         ModRemoveCommunity::create(conn, &form)
 152       })
 153       .await??;
 154       let deleted_community = blocking(context.pool(), move |conn| {
 155         Community::update_removed(conn, community.id, true)
 156       })
 157       .await??;
 158
 159       send_community_ws_message(deleted_community.id, RemoveCommunity, None, None, context).await?;
 160     }
 161     DeletableObjects::Post(post) => {
 162       let form = ModRemovePostForm {
 163         mod_person_id: actor.id,
 164         post_id: post.id,
 165         removed: Some(true),
 166         reason,
 167       };
 168       blocking(context.pool(), move |conn| {
 169         ModRemovePost::create(conn, &form)
 170       })
 171       .await??;
 172       let removed_post = blocking(context.pool(), move |conn| {
 173         Post::update_removed(conn, post.id, true)
 174       })
 175       .await??;
 176
 177       send_post_ws_message(removed_post.id, RemovePost, None, None, context).await?;
 178     }
 179     DeletableObjects::Comment(comment) => {
 180       let form = ModRemoveCommentForm {
 181         mod_person_id: actor.id,
 182         comment_id: comment.id,
 183         removed: Some(true),
 184         reason,
 185       };
 186       blocking(context.pool(), move |conn| {
 187         ModRemoveComment::create(conn, &form)
 188       })
 189       .await??;
 190       let removed_comment = blocking(context.pool(), move |conn| {
 191         Comment::update_removed(conn, comment.id, true)
 192       })
 193       .await??;
 194
 195       send_comment_ws_message_simple(removed_comment.id, RemoveComment, context).await?;
 196     }
 197   }
 198   Ok(())
 199 }
 200
 201 #[async_trait::async_trait(?Send)]
 202 impl GetCommunity for Delete {
 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, 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     };
 216     let community = blocking(context.pool(), move |conn| {
 217       Community::read(conn, community_id)
 218     })
 219     .await??;
 220     Ok(community.into())
 221   }
 222 }