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

   1 use crate::{
   2   activities::{
   3     community::{announce::AnnouncableActivities, send_to_community},
   4     generate_activity_id,
   5     verify_activity,
   6     verify_is_public,
   7     verify_mod_action,
   8     verify_person_in_community,
   9   },
  10   context::lemmy_context,
  11   fetcher::object_id::ObjectId,
  12   objects::{
  13     community::{ApubCommunity, Group},
  14     person::ApubPerson,
  15   },
  16 };
  17 use activitystreams::{
  18   activity::kind::UpdateType,
  19   base::AnyBase,
  20   primitives::OneOrMany,
  21   public,
  22   unparsed::Unparsed,
  23 };
  24 use lemmy_api_common::blocking;
  25 use lemmy_apub_lib::{
  26   data::Data,
  27   traits::{ActivityFields, ActivityHandler, ActorType, ApubObject},
  28 };
  29 use lemmy_db_schema::{
  30   source::community::{Community, CommunityForm},
  31   traits::Crud,
  32 };
  33 use lemmy_utils::LemmyError;
  34 use lemmy_websocket::{send::send_community_ws_message, LemmyContext, UserOperationCrud};
  35 use serde::{Deserialize, Serialize};
  36 use url::Url;
  37
  38 /// This activity is received from a remote community mod, and updates the description or other
  39 /// fields of a local community.
  40 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
  41 #[serde(rename_all = "camelCase")]
  42 pub struct UpdateCommunity {
  43   actor: ObjectId<ApubPerson>,
  44   to: Vec<Url>,
  45   // TODO: would be nice to use a separate struct here, which only contains the fields updated here
  46   object: Group,
  47   cc: [ObjectId<ApubCommunity>; 1],
  48   #[serde(rename = "type")]
  49   kind: UpdateType,
  50   id: Url,
  51   #[serde(rename = "@context")]
  52   context: OneOrMany<AnyBase>,
  53   #[serde(flatten)]
  54   unparsed: Unparsed,
  55 }
  56
  57 impl UpdateCommunity {
  58   pub async fn send(
  59     community: &ApubCommunity,
  60     actor: &ApubPerson,
  61     context: &LemmyContext,
  62   ) -> Result<(), LemmyError> {
  63     let id = generate_activity_id(
  64       UpdateType::Update,
  65       &context.settings().get_protocol_and_hostname(),
  66     )?;
  67     let update = UpdateCommunity {
  68       actor: ObjectId::new(actor.actor_id()),
  69       to: vec![public()],
  70       object: community.to_apub(context).await?,
  71       cc: [ObjectId::new(community.actor_id())],
  72       kind: UpdateType::Update,
  73       id: id.clone(),
  74       context: lemmy_context(),
  75       unparsed: Default::default(),
  76     };
  77
  78     let activity = AnnouncableActivities::UpdateCommunity(Box::new(update));
  79     send_to_community(activity, &id, actor, community, vec![], context).await
  80   }
  81 }
  82
  83 #[async_trait::async_trait(?Send)]
  84 impl ActivityHandler for UpdateCommunity {
  85   type DataType = LemmyContext;
  86   async fn verify(
  87     &self,
  88     context: &Data<LemmyContext>,
  89     request_counter: &mut i32,
  90   ) -> Result<(), LemmyError> {
  91     verify_is_public(&self.to)?;
  92     verify_activity(self, &context.settings())?;
  93     verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
  94     verify_mod_action(&self.actor, &self.cc[0], context, request_counter).await?;
  95     Ok(())
  96   }
  97
  98   async fn receive(
  99     self,
 100     context: &Data<LemmyContext>,
 101     request_counter: &mut i32,
 102   ) -> Result<(), LemmyError> {
 103     let cc = self.cc[0].clone();
 104     let community = cc.dereference(context, request_counter).await?;
 105
 106     let updated_community = Group::from_apub_to_form(
 107       &self.object,
 108       &community.actor_id.clone().into(),
 109       &context.settings(),
 110     )
 111     .await?;
 112     let cf = CommunityForm {
 113       name: updated_community.name,
 114       title: updated_community.title,
 115       description: updated_community.description,
 116       nsfw: updated_community.nsfw,
 117       // TODO: icon and banner would be hosted on the other instance, ideally we would copy it to ours
 118       icon: updated_community.icon,
 119       banner: updated_community.banner,
 120       ..CommunityForm::default()
 121     };
 122     let updated_community = blocking(context.pool(), move |conn| {
 123       Community::update(conn, community.id, &cf)
 124     })
 125     .await??;
 126
 127     send_community_ws_message(
 128       updated_community.id,
 129       UserOperationCrud::EditCommunity,
 130       None,
 131       None,
 132       context,
 133     )
 134     .await?;
 135     Ok(())
 136   }
 137 }