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