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::{community::get_or_fetch_and_upsert_community, person::get_or_fetch_and_upsert_person},
  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: Url,
  39   to: [PublicUrl; 1],
  40   pub(in crate::activities) object: Url,
  41   cc: [Url; 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(RemoveType::Remove)?;
  61     let remove = RemoveMod {
  62       actor: actor.actor_id(),
  63       to: [PublicUrl::Public],
  64       object: removed_mod.actor_id(),
  65       target: Some(generate_moderators_url(&community.actor_id)?.into()),
  66       id: id.clone(),
  67       context: lemmy_context(),
  68       cc: [community.actor_id()],
  69       kind: RemoveType::Remove,
  70       unparsed: Default::default(),
  71     };
  72
  73     let activity = AnnouncableActivities::RemoveMod(remove);
  74     let inboxes = vec![removed_mod.get_shared_inbox_or_inbox_url()];
  75     send_to_community_new(activity, &id, actor, community, inboxes, context).await
  76   }
  77 }
  78
  79 #[async_trait::async_trait(?Send)]
  80 impl ActivityHandler for RemoveMod {
  81   async fn verify(
  82     &self,
  83     context: &LemmyContext,
  84     request_counter: &mut i32,
  85   ) -> Result<(), LemmyError> {
  86     verify_activity(self)?;
  87     if let Some(target) = &self.target {
  88       verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
  89       verify_mod_action(&self.actor, self.cc[0].clone(), context).await?;
  90       verify_add_remove_moderator_target(target, self.cc[0].clone())?;
  91     } else {
  92       verify_delete_activity(
  93         &self.object,
  94         self,
  95         &self.cc[0],
  96         true,
  97         context,
  98         request_counter,
  99       )
 100       .await?;
 101     }
 102     Ok(())
 103   }
 104
 105   async fn receive(
 106     self,
 107     context: &LemmyContext,
 108     request_counter: &mut i32,
 109   ) -> Result<(), LemmyError> {
 110     if self.target.is_some() {
 111       let community =
 112         get_or_fetch_and_upsert_community(&self.cc[0], context, request_counter).await?;
 113       let remove_mod =
 114         get_or_fetch_and_upsert_person(&self.object, context, request_counter).await?;
 115
 116       let form = CommunityModeratorForm {
 117         community_id: community.id,
 118         person_id: remove_mod.id,
 119       };
 120       blocking(context.pool(), move |conn| {
 121         CommunityModerator::leave(conn, &form)
 122       })
 123       .await??;
 124       // TODO: send websocket notification about removed mod
 125       Ok(())
 126     } else {
 127       receive_remove_action(&self.actor, &self.object, None, context, request_counter).await
 128     }
 129   }
 130 }