crates/apub/src/activities/community/block_user.rs

   1 use crate::{
   2   activities::{
   3     community::{announce::AnnouncableActivities, send_to_community},
   4     generate_activity_id,
   5     verify_activity,
   6     verify_is_public,
   7     verify_mod_action,
   8     verify_person_in_community,
   9   },
  10   context::lemmy_context,
  11   fetcher::object_id::ObjectId,
  12   objects::{community::ApubCommunity, person::ApubPerson},
  13 };
  14 use activitystreams::{
  15   activity::kind::BlockType,
  16   base::AnyBase,
  17   primitives::OneOrMany,
  18   public,
  19   unparsed::Unparsed,
  20 };
  21 use lemmy_api_common::blocking;
  22 use lemmy_apub_lib::{
  23   data::Data,
  24   traits::{ActivityFields, ActivityHandler, ActorType},
  25 };
  26 use lemmy_db_schema::{
  27   source::community::{
  28     CommunityFollower,
  29     CommunityFollowerForm,
  30     CommunityPersonBan,
  31     CommunityPersonBanForm,
  32   },
  33   traits::{Bannable, Followable},
  34 };
  35 use lemmy_utils::LemmyError;
  36 use lemmy_websocket::LemmyContext;
  37 use serde::{Deserialize, Serialize};
  38 use url::Url;
  39
  40 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
  41 #[serde(rename_all = "camelCase")]
  42 pub struct BlockUserFromCommunity {
  43   actor: ObjectId<ApubPerson>,
  44   to: Vec<Url>,
  45   pub(in crate::activities::community) object: ObjectId<ApubPerson>,
  46   cc: [ObjectId<ApubCommunity>; 1],
  47   #[serde(rename = "type")]
  48   kind: BlockType,
  49   id: Url,
  50   #[serde(rename = "@context")]
  51   context: OneOrMany<AnyBase>,
  52   #[serde(flatten)]
  53   unparsed: Unparsed,
  54 }
  55
  56 impl BlockUserFromCommunity {
  57   pub(in crate::activities::community) fn new(
  58     community: &ApubCommunity,
  59     target: &ApubPerson,
  60     actor: &ApubPerson,
  61     context: &LemmyContext,
  62   ) -> Result<BlockUserFromCommunity, LemmyError> {
  63     Ok(BlockUserFromCommunity {
  64       actor: ObjectId::new(actor.actor_id()),
  65       to: vec![public()],
  66       object: ObjectId::new(target.actor_id()),
  67       cc: [ObjectId::new(community.actor_id())],
  68       kind: BlockType::Block,
  69       id: generate_activity_id(
  70         BlockType::Block,
  71         &context.settings().get_protocol_and_hostname(),
  72       )?,
  73       context: lemmy_context(),
  74       unparsed: Default::default(),
  75     })
  76   }
  77
  78   pub async fn send(
  79     community: &ApubCommunity,
  80     target: &ApubPerson,
  81     actor: &ApubPerson,
  82     context: &LemmyContext,
  83   ) -> Result<(), LemmyError> {
  84     let block = BlockUserFromCommunity::new(community, target, actor, context)?;
  85     let block_id = block.id.clone();
  86
  87     let activity = AnnouncableActivities::BlockUserFromCommunity(block);
  88     let inboxes = vec![target.shared_inbox_or_inbox_url()];
  89     send_to_community(activity, &block_id, actor, community, inboxes, context).await
  90   }
  91 }
  92
  93 #[async_trait::async_trait(?Send)]
  94 impl ActivityHandler for BlockUserFromCommunity {
  95   type DataType = LemmyContext;
  96   async fn verify(
  97     &self,
  98     context: &Data<LemmyContext>,
  99     request_counter: &mut i32,
 100   ) -> Result<(), LemmyError> {
 101     verify_is_public(&self.to)?;
 102     verify_activity(self, &context.settings())?;
 103     verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
 104     verify_mod_action(&self.actor, &self.cc[0], context, request_counter).await?;
 105     Ok(())
 106   }
 107
 108   async fn receive(
 109     self,
 110     context: &Data<LemmyContext>,
 111     request_counter: &mut i32,
 112   ) -> Result<(), LemmyError> {
 113     let community = self.cc[0].dereference(context, request_counter).await?;
 114     let blocked_user = self.object.dereference(context, request_counter).await?;
 115
 116     let community_user_ban_form = CommunityPersonBanForm {
 117       community_id: community.id,
 118       person_id: blocked_user.id,
 119     };
 120
 121     blocking(context.pool(), move |conn: &'_ _| {
 122       CommunityPersonBan::ban(conn, &community_user_ban_form)
 123     })
 124     .await??;
 125
 126     // Also unsubscribe them from the community, if they are subscribed
 127     let community_follower_form = CommunityFollowerForm {
 128       community_id: community.id,
 129       person_id: blocked_user.id,
 130       pending: false,
 131     };
 132     blocking(context.pool(), move |conn: &'_ _| {
 133       CommunityFollower::unfollow(conn, &community_follower_form)
 134     })
 135     .await?
 136     .ok();
 137
 138     Ok(())
 139   }
 140 }