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 };
  15 use activitystreams::{
  16   activity::kind::RemoveType,
  17   base::AnyBase,
  18   primitives::OneOrMany,
  19   unparsed::Unparsed,
  20 };
  21 use lemmy_api_common::blocking;
  22 use lemmy_apub_lib::{
  23   data::Data,
  24   traits::{ActivityFields, ActivityHandler, ActorType},
  25   values::PublicUrl,
  26 };
  27 use lemmy_db_schema::{
  28   source::{
  29     community::{Community, CommunityModerator, CommunityModeratorForm},
  30     person::Person,
  31   },
  32   traits::Joinable,
  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 RemoveMod {
  42   actor: ObjectId<Person>,
  43   to: [PublicUrl; 1],
  44   pub(in crate::activities) object: ObjectId<Person>,
  45   cc: [ObjectId<Community>; 1],
  46   #[serde(rename = "type")]
  47   kind: RemoveType,
  48   // if target is set, this is means remove mod from community
  49   pub(in crate::activities) target: Option<Url>,
  50   id: Url,
  51   #[serde(rename = "@context")]
  52   context: OneOrMany<AnyBase>,
  53   #[serde(flatten)]
  54   unparsed: Unparsed,
  55 }
  56
  57 impl RemoveMod {
  58   pub async fn send(
  59     community: &Community,
  60     removed_mod: &Person,
  61     actor: &Person,
  62     context: &LemmyContext,
  63   ) -> Result<(), LemmyError> {
  64     let id = generate_activity_id(
  65       RemoveType::Remove,
  66       &context.settings().get_protocol_and_hostname(),
  67     )?;
  68     let remove = RemoveMod {
  69       actor: ObjectId::new(actor.actor_id()),
  70       to: [PublicUrl::Public],
  71       object: ObjectId::new(removed_mod.actor_id()),
  72       target: Some(generate_moderators_url(&community.actor_id)?.into()),
  73       id: id.clone(),
  74       context: lemmy_context(),
  75       cc: [ObjectId::new(community.actor_id())],
  76       kind: RemoveType::Remove,
  77       unparsed: Default::default(),
  78     };
  79
  80     let activity = AnnouncableActivities::RemoveMod(remove);
  81     let inboxes = vec![removed_mod.shared_inbox_or_inbox_url()];
  82     send_to_community(activity, &id, actor, community, inboxes, context).await
  83   }
  84 }
  85
  86 #[async_trait::async_trait(?Send)]
  87 impl ActivityHandler for RemoveMod {
  88   type DataType = LemmyContext;
  89   async fn verify(
  90     &self,
  91     context: &Data<LemmyContext>,
  92     request_counter: &mut i32,
  93   ) -> Result<(), LemmyError> {
  94     verify_activity(self, &context.settings())?;
  95     if let Some(target) = &self.target {
  96       verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
  97       verify_mod_action(&self.actor, self.cc[0].clone(), context, request_counter).await?;
  98       verify_add_remove_moderator_target(target, &self.cc[0])?;
  99     } else {
 100       verify_delete_activity(
 101         self.object.inner(),
 102         self,
 103         &self.cc[0],
 104         true,
 105         context,
 106         request_counter,
 107       )
 108       .await?;
 109     }
 110     Ok(())
 111   }
 112
 113   async fn receive(
 114     self,
 115     context: &Data<LemmyContext>,
 116     request_counter: &mut i32,
 117   ) -> Result<(), LemmyError> {
 118     if self.target.is_some() {
 119       let community = self.cc[0].dereference(context, request_counter).await?;
 120       let remove_mod = self.object.dereference(context, request_counter).await?;
 121
 122       let form = CommunityModeratorForm {
 123         community_id: community.id,
 124         person_id: remove_mod.id,
 125       };
 126       blocking(context.pool(), move |conn| {
 127         CommunityModerator::leave(conn, &form)
 128       })
 129       .await??;
 130       // TODO: send websocket notification about removed mod
 131       Ok(())
 132     } else {
 133       receive_remove_action(
 134         &self.actor,
 135         self.object.inner(),
 136         None,
 137         context,
 138         request_counter,
 139       )
 140       .await
 141     }
 142   }
 143 }