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

   1 use crate::{
   2   activities::{
   3     community::{
   4       announce::{AnnouncableActivities, GetCommunity},
   5       get_community_from_moderators_url,
   6       send_to_community,
   7     },
   8     generate_activity_id,
   9     verify_activity,
  10     verify_add_remove_moderator_target,
  11     verify_is_public,
  12     verify_mod_action,
  13     verify_person_in_community,
  14   },
  15   context::lemmy_context,
  16   fetcher::object_id::ObjectId,
  17   generate_moderators_url,
  18   objects::{community::ApubCommunity, person::ApubPerson},
  19 };
  20 use activitystreams::{
  21   activity::kind::RemoveType,
  22   base::AnyBase,
  23   primitives::OneOrMany,
  24   public,
  25   unparsed::Unparsed,
  26 };
  27 use lemmy_api_common::blocking;
  28 use lemmy_apub_lib::{
  29   data::Data,
  30   traits::{ActivityFields, ActivityHandler, ActorType},
  31 };
  32 use lemmy_db_schema::{
  33   source::community::{CommunityModerator, CommunityModeratorForm},
  34   traits::Joinable,
  35 };
  36 use lemmy_utils::LemmyError;
  37 use lemmy_websocket::LemmyContext;
  38 use serde::{Deserialize, Serialize};
  39 use url::Url;
  40
  41 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
  42 #[serde(rename_all = "camelCase")]
  43 pub struct RemoveMod {
  44   actor: ObjectId<ApubPerson>,
  45   to: Vec<Url>,
  46   pub(in crate::activities) object: ObjectId<ApubPerson>,
  47   cc: [ObjectId<ApubCommunity>; 1],
  48   #[serde(rename = "type")]
  49   kind: RemoveType,
  50   pub(in crate::activities) target: Url,
  51   id: Url,
  52   #[serde(rename = "@context")]
  53   context: OneOrMany<AnyBase>,
  54   #[serde(flatten)]
  55   unparsed: Unparsed,
  56 }
  57
  58 impl RemoveMod {
  59   pub async fn send(
  60     community: &ApubCommunity,
  61     removed_mod: &ApubPerson,
  62     actor: &ApubPerson,
  63     context: &LemmyContext,
  64   ) -> Result<(), LemmyError> {
  65     let id = generate_activity_id(
  66       RemoveType::Remove,
  67       &context.settings().get_protocol_and_hostname(),
  68     )?;
  69     let remove = RemoveMod {
  70       actor: ObjectId::new(actor.actor_id()),
  71       to: vec![public()],
  72       object: ObjectId::new(removed_mod.actor_id()),
  73       target: generate_moderators_url(&community.actor_id)?.into(),
  74       id: id.clone(),
  75       context: lemmy_context(),
  76       cc: [ObjectId::new(community.actor_id())],
  77       kind: RemoveType::Remove,
  78       unparsed: Default::default(),
  79     };
  80
  81     let activity = AnnouncableActivities::RemoveMod(remove);
  82     let inboxes = vec![removed_mod.shared_inbox_or_inbox_url()];
  83     send_to_community(activity, &id, actor, community, inboxes, context).await
  84   }
  85 }
  86
  87 #[async_trait::async_trait(?Send)]
  88 impl ActivityHandler for RemoveMod {
  89   type DataType = LemmyContext;
  90   async fn verify(
  91     &self,
  92     context: &Data<LemmyContext>,
  93     request_counter: &mut i32,
  94   ) -> Result<(), LemmyError> {
  95     verify_is_public(&self.to)?;
  96     verify_activity(self, &context.settings())?;
  97     let community = self.get_community(context, request_counter).await?;
  98     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  99     verify_mod_action(&self.actor, &self.cc[0], context, request_counter).await?;
 100     verify_add_remove_moderator_target(&self.target, &self.cc[0])?;
 101     Ok(())
 102   }
 103
 104   async fn receive(
 105     self,
 106     context: &Data<LemmyContext>,
 107     request_counter: &mut i32,
 108   ) -> Result<(), LemmyError> {
 109     let community = self.get_community(context, request_counter).await?;
 110     let remove_mod = self.object.dereference(context, request_counter).await?;
 111
 112     let form = CommunityModeratorForm {
 113       community_id: community.id,
 114       person_id: remove_mod.id,
 115     };
 116     blocking(context.pool(), move |conn| {
 117       CommunityModerator::leave(conn, &form)
 118     })
 119     .await??;
 120     // TODO: send websocket notification about removed mod
 121     Ok(())
 122   }
 123 }
 124
 125 #[async_trait::async_trait(?Send)]
 126 impl GetCommunity for RemoveMod {
 127   async fn get_community(
 128     &self,
 129     context: &LemmyContext,
 130     request_counter: &mut i32,
 131   ) -> Result<ApubCommunity, LemmyError> {
 132     get_community_from_moderators_url(&self.target, context, request_counter).await
 133   }
 134 }