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

   1 use crate::{
   2   activities::{
   3     community::announce::AnnouncableActivities,
   4     deletion::{delete::receive_remove_action, verify_delete_activity},
   5     generate_activity_id,
   6     verify_activity,
   7     verify_add_remove_moderator_target,
   8     verify_mod_action,
   9     verify_person_in_community,
  10   },
  11   activity_queue::send_to_community_new,
  12   extensions::context::lemmy_context,
  13   fetcher::object_id::ObjectId,
  14   generate_moderators_url,
  15   ActorType,
  16 };
  17 use activitystreams::{
  18   activity::kind::RemoveType,
  19   base::AnyBase,
  20   primitives::OneOrMany,
  21   unparsed::Unparsed,
  22 };
  23 use lemmy_api_common::blocking;
  24 use lemmy_apub_lib::{values::PublicUrl, ActivityFields, ActivityHandler};
  25 use lemmy_db_queries::Joinable;
  26 use lemmy_db_schema::source::{
  27   community::{Community, CommunityModerator, CommunityModeratorForm},
  28   person::Person,
  29 };
  30 use lemmy_utils::LemmyError;
  31 use lemmy_websocket::LemmyContext;
  32 use serde::{Deserialize, Serialize};
  33 use url::Url;
  34
  35 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
  36 #[serde(rename_all = "camelCase")]
  37 pub struct RemoveMod {
  38   actor: ObjectId<Person>,
  39   to: [PublicUrl; 1],
  40   pub(in crate::activities) object: ObjectId<Person>,
  41   cc: [ObjectId<Community>; 1],
  42   #[serde(rename = "type")]
  43   kind: RemoveType,
  44   // if target is set, this is means remove mod from community
  45   pub(in crate::activities) target: Option<Url>,
  46   id: Url,
  47   #[serde(rename = "@context")]
  48   context: OneOrMany<AnyBase>,
  49   #[serde(flatten)]
  50   unparsed: Unparsed,
  51 }
  52
  53 impl RemoveMod {
  54   pub async fn send(
  55     community: &Community,
  56     removed_mod: &Person,
  57     actor: &Person,
  58     context: &LemmyContext,
  59   ) -> Result<(), LemmyError> {
  60     let id = generate_activity_id(
  61       RemoveType::Remove,
  62       &context.settings().get_protocol_and_hostname(),
  63     )?;
  64     let remove = RemoveMod {
  65       actor: ObjectId::new(actor.actor_id()),
  66       to: [PublicUrl::Public],
  67       object: ObjectId::new(removed_mod.actor_id()),
  68       target: Some(generate_moderators_url(&community.actor_id)?.into()),
  69       id: id.clone(),
  70       context: lemmy_context(),
  71       cc: [ObjectId::new(community.actor_id())],
  72       kind: RemoveType::Remove,
  73       unparsed: Default::default(),
  74     };
  75
  76     let activity = AnnouncableActivities::RemoveMod(remove);
  77     let inboxes = vec![removed_mod.get_shared_inbox_or_inbox_url()];
  78     send_to_community_new(activity, &id, actor, community, inboxes, context).await
  79   }
  80 }
  81
  82 #[async_trait::async_trait(?Send)]
  83 impl ActivityHandler for RemoveMod {
  84   async fn verify(
  85     &self,
  86     context: &LemmyContext,
  87     request_counter: &mut i32,
  88   ) -> Result<(), LemmyError> {
  89     verify_activity(self, &context.settings())?;
  90     if let Some(target) = &self.target {
  91       verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
  92       verify_mod_action(&self.actor, self.cc[0].clone(), context).await?;
  93       verify_add_remove_moderator_target(target, &self.cc[0])?;
  94     } else {
  95       verify_delete_activity(
  96         self.object.inner(),
  97         self,
  98         &self.cc[0],
  99         true,
 100         context,
 101         request_counter,
 102       )
 103       .await?;
 104     }
 105     Ok(())
 106   }
 107
 108   async fn receive(
 109     self,
 110     context: &LemmyContext,
 111     request_counter: &mut i32,
 112   ) -> Result<(), LemmyError> {
 113     if self.target.is_some() {
 114       let community = self.cc[0].dereference(context, request_counter).await?;
 115       let remove_mod = self.object.dereference(context, request_counter).await?;
 116
 117       let form = CommunityModeratorForm {
 118         community_id: community.id,
 119         person_id: remove_mod.id,
 120       };
 121       blocking(context.pool(), move |conn| {
 122         CommunityModerator::leave(conn, &form)
 123       })
 124       .await??;
 125       // TODO: send websocket notification about removed mod
 126       Ok(())
 127     } else {
 128       receive_remove_action(
 129         &self.actor,
 130         self.object.inner(),
 131         None,
 132         context,
 133         request_counter,
 134       )
 135       .await
 136     }
 137   }
 138 }