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