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

   1 use crate::{
   2   activities::{
   3     community::{announce::AnnouncableActivities, send_to_community},
   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   context::lemmy_context,
  12   fetcher::object_id::ObjectId,
  13   generate_moderators_url,
  14   migrations::PublicUrlMigration,
  15   objects::{community::ApubCommunity, person::ApubPerson},
  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::{
  25   data::Data,
  26   traits::{ActivityFields, ActivityHandler, ActorType},
  27 };
  28 use lemmy_db_schema::{
  29   source::community::{CommunityModerator, CommunityModeratorForm},
  30   traits::Joinable,
  31 };
  32 use lemmy_utils::LemmyError;
  33 use lemmy_websocket::LemmyContext;
  34 use serde::{Deserialize, Serialize};
  35 use url::Url;
  36
  37 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
  38 #[serde(rename_all = "camelCase")]
  39 pub struct RemoveMod {
  40   actor: ObjectId<ApubPerson>,
  41   to: PublicUrlMigration,
  42   pub(in crate::activities) object: ObjectId<ApubPerson>,
  43   cc: [ObjectId<ApubCommunity>; 1],
  44   #[serde(rename = "type")]
  45   kind: RemoveType,
  46   // if target is set, this is means remove mod from community
  47   pub(in crate::activities) target: Option<Url>,
  48   id: Url,
  49   #[serde(rename = "@context")]
  50   context: OneOrMany<AnyBase>,
  51   #[serde(flatten)]
  52   unparsed: Unparsed,
  53 }
  54
  55 impl RemoveMod {
  56   pub async fn send(
  57     community: &ApubCommunity,
  58     removed_mod: &ApubPerson,
  59     actor: &ApubPerson,
  60     context: &LemmyContext,
  61   ) -> Result<(), LemmyError> {
  62     let id = generate_activity_id(
  63       RemoveType::Remove,
  64       &context.settings().get_protocol_and_hostname(),
  65     )?;
  66     let remove = RemoveMod {
  67       actor: ObjectId::new(actor.actor_id()),
  68       to: PublicUrlMigration::create(),
  69       object: ObjectId::new(removed_mod.actor_id()),
  70       target: Some(generate_moderators_url(&community.actor_id)?.into()),
  71       id: id.clone(),
  72       context: lemmy_context(),
  73       cc: [ObjectId::new(community.actor_id())],
  74       kind: RemoveType::Remove,
  75       unparsed: Default::default(),
  76     };
  77
  78     let activity = AnnouncableActivities::RemoveMod(remove);
  79     let inboxes = vec![removed_mod.shared_inbox_or_inbox_url()];
  80     send_to_community(activity, &id, actor, community, inboxes, context).await
  81   }
  82 }
  83
  84 #[async_trait::async_trait(?Send)]
  85 impl ActivityHandler for RemoveMod {
  86   type DataType = LemmyContext;
  87   async fn verify(
  88     &self,
  89     context: &Data<LemmyContext>,
  90     request_counter: &mut i32,
  91   ) -> Result<(), LemmyError> {
  92     verify_activity(self, &context.settings())?;
  93     if let Some(target) = &self.target {
  94       verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
  95       verify_mod_action(&self.actor, &self.cc[0], context, request_counter).await?;
  96       verify_add_remove_moderator_target(target, &self.cc[0])?;
  97     } else {
  98       verify_delete_activity(
  99         self.object.inner(),
 100         self,
 101         &self.cc[0],
 102         true,
 103         context,
 104         request_counter,
 105       )
 106       .await?;
 107     }
 108     Ok(())
 109   }
 110
 111   async fn receive(
 112     self,
 113     context: &Data<LemmyContext>,
 114     request_counter: &mut i32,
 115   ) -> Result<(), LemmyError> {
 116     if self.target.is_some() {
 117       let community = self.cc[0].dereference(context, request_counter).await?;
 118       let remove_mod = self.object.dereference(context, request_counter).await?;
 119
 120       let form = CommunityModeratorForm {
 121         community_id: community.id,
 122         person_id: remove_mod.id,
 123       };
 124       blocking(context.pool(), move |conn| {
 125         CommunityModerator::leave(conn, &form)
 126       })
 127       .await??;
 128       // TODO: send websocket notification about removed mod
 129       Ok(())
 130     } else {
 131       receive_remove_action(
 132         &self.actor,
 133         self.object.inner(),
 134         None,
 135         context,
 136         request_counter,
 137       )
 138       .await
 139     }
 140   }
 141 }