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