crates/apub/src/activities/following/follow.rs

   1 use crate::{
   2   activities::{
   3     generate_activity_id,
   4     send_lemmy_activity,
   5     verify_person,
   6     verify_person_in_community,
   7   },
   8   fetcher::user_or_community::UserOrCommunity,
   9   local_instance,
  10   objects::{community::ApubCommunity, person::ApubPerson},
  11   protocol::activities::following::{accept::AcceptFollow, follow::Follow},
  12   ActorType,
  13 };
  14 use activitypub_federation::{
  15   core::object_id::ObjectId,
  16   data::Data,
  17   traits::{ActivityHandler, Actor},
  18 };
  19 use activitystreams_kinds::activity::FollowType;
  20 use lemmy_api_common::LemmyContext;
  21 use lemmy_db_schema::{
  22   source::{
  23     community::{CommunityFollower, CommunityFollowerForm},
  24     person::{PersonFollower, PersonFollowerForm},
  25   },
  26   traits::Followable,
  27 };
  28 use lemmy_utils::error::LemmyError;
  29 use url::Url;
  30
  31 impl Follow {
  32   pub(in crate::activities::following) fn new(
  33     actor: &ApubPerson,
  34     community: &ApubCommunity,
  35     context: &LemmyContext,
  36   ) -> Result<Follow, LemmyError> {
  37     Ok(Follow {
  38       actor: ObjectId::new(actor.actor_id()),
  39       object: ObjectId::new(community.actor_id()),
  40       kind: FollowType::Follow,
  41       id: generate_activity_id(
  42         FollowType::Follow,
  43         &context.settings().get_protocol_and_hostname(),
  44       )?,
  45     })
  46   }
  47
  48   #[tracing::instrument(skip_all)]
  49   pub async fn send(
  50     actor: &ApubPerson,
  51     community: &ApubCommunity,
  52     context: &LemmyContext,
  53   ) -> Result<(), LemmyError> {
  54     let community_follower_form = CommunityFollowerForm {
  55       community_id: community.id,
  56       person_id: actor.id,
  57       pending: true,
  58     };
  59     CommunityFollower::follow(context.pool(), &community_follower_form)
  60       .await
  61       .ok();
  62
  63     let follow = Follow::new(actor, community, context)?;
  64     let inbox = vec![community.shared_inbox_or_inbox()];
  65     send_lemmy_activity(context, follow, actor, inbox, true).await
  66   }
  67 }
  68
  69 #[async_trait::async_trait(?Send)]
  70 impl ActivityHandler for Follow {
  71   type DataType = LemmyContext;
  72   type Error = LemmyError;
  73
  74   fn id(&self) -> &Url {
  75     &self.id
  76   }
  77
  78   fn actor(&self) -> &Url {
  79     self.actor.inner()
  80   }
  81
  82   #[tracing::instrument(skip_all)]
  83   async fn verify(
  84     &self,
  85     context: &Data<LemmyContext>,
  86     request_counter: &mut i32,
  87   ) -> Result<(), LemmyError> {
  88     verify_person(&self.actor, context, request_counter).await?;
  89     let object = self
  90       .object
  91       .dereference(context, local_instance(context).await, request_counter)
  92       .await?;
  93     if let UserOrCommunity::Community(c) = object {
  94       verify_person_in_community(&self.actor, &c, context, request_counter).await?;
  95     }
  96     Ok(())
  97   }
  98
  99   #[tracing::instrument(skip_all)]
 100   async fn receive(
 101     self,
 102     context: &Data<LemmyContext>,
 103     request_counter: &mut i32,
 104   ) -> Result<(), LemmyError> {
 105     let actor = self
 106       .actor
 107       .dereference(context, local_instance(context).await, request_counter)
 108       .await?;
 109     let object = self
 110       .object
 111       .dereference(context, local_instance(context).await, request_counter)
 112       .await?;
 113     match object {
 114       UserOrCommunity::User(u) => {
 115         let form = PersonFollowerForm {
 116           person_id: u.id,
 117           follower_id: actor.id,
 118           pending: false,
 119         };
 120         PersonFollower::follow(context.pool(), &form).await?;
 121       }
 122       UserOrCommunity::Community(c) => {
 123         let form = CommunityFollowerForm {
 124           community_id: c.id,
 125           person_id: actor.id,
 126           pending: false,
 127         };
 128         CommunityFollower::follow(context.pool(), &form).await?;
 129       }
 130     }
 131
 132     AcceptFollow::send(self, context, request_counter).await
 133   }
 134 }