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

   1 use crate::{
   2   activities::{
   3     community::announce::AnnouncableActivities,
   4     generate_activity_id,
   5     verify_activity,
   6     verify_mod_action,
   7     verify_person_in_community,
   8   },
   9   activity_queue::send_to_community_new,
  10   extensions::context::lemmy_context,
  11   fetcher::object_id::ObjectId,
  12   objects::{community::Group, ToApub},
  13   ActorType,
  14 };
  15 use activitystreams::{
  16   activity::kind::UpdateType,
  17   base::AnyBase,
  18   primitives::OneOrMany,
  19   unparsed::Unparsed,
  20 };
  21 use lemmy_api_common::blocking;
  22 use lemmy_apub_lib::{values::PublicUrl, ActivityFields, ActivityHandler};
  23 use lemmy_db_queries::{ApubObject, Crud};
  24 use lemmy_db_schema::source::{
  25   community::{Community, CommunityForm},
  26   person::Person,
  27 };
  28 use lemmy_utils::LemmyError;
  29 use lemmy_websocket::{send::send_community_ws_message, LemmyContext, UserOperationCrud};
  30 use serde::{Deserialize, Serialize};
  31 use url::Url;
  32
  33 /// This activity is received from a remote community mod, and updates the description or other
  34 /// fields of a local community.
  35 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
  36 #[serde(rename_all = "camelCase")]
  37 pub struct UpdateCommunity {
  38   actor: ObjectId<Person>,
  39   to: [PublicUrl; 1],
  40   // TODO: would be nice to use a separate struct here, which only contains the fields updated here
  41   object: Group,
  42   cc: [ObjectId<Community>; 1],
  43   #[serde(rename = "type")]
  44   kind: UpdateType,
  45   id: Url,
  46   #[serde(rename = "@context")]
  47   context: OneOrMany<AnyBase>,
  48   #[serde(flatten)]
  49   unparsed: Unparsed,
  50 }
  51
  52 impl UpdateCommunity {
  53   pub async fn send(
  54     community: &Community,
  55     actor: &Person,
  56     context: &LemmyContext,
  57   ) -> Result<(), LemmyError> {
  58     let id = generate_activity_id(
  59       UpdateType::Update,
  60       &context.settings().get_protocol_and_hostname(),
  61     )?;
  62     let update = UpdateCommunity {
  63       actor: ObjectId::new(actor.actor_id()),
  64       to: [PublicUrl::Public],
  65       object: community.to_apub(context.pool()).await?,
  66       cc: [ObjectId::new(community.actor_id())],
  67       kind: UpdateType::Update,
  68       id: id.clone(),
  69       context: lemmy_context(),
  70       unparsed: Default::default(),
  71     };
  72
  73     let activity = AnnouncableActivities::UpdateCommunity(Box::new(update));
  74     send_to_community_new(activity, &id, actor, community, vec![], context).await
  75   }
  76 }
  77
  78 #[async_trait::async_trait(?Send)]
  79 impl ActivityHandler for UpdateCommunity {
  80   async fn verify(
  81     &self,
  82     context: &LemmyContext,
  83     request_counter: &mut i32,
  84   ) -> Result<(), LemmyError> {
  85     verify_activity(self, &context.settings())?;
  86     verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
  87     verify_mod_action(&self.actor, self.cc[0].clone(), context).await?;
  88     Ok(())
  89   }
  90
  91   async fn receive(
  92     self,
  93     context: &LemmyContext,
  94     _request_counter: &mut i32,
  95   ) -> Result<(), LemmyError> {
  96     let cc = self.cc[0].clone().into();
  97     let community = blocking(context.pool(), move |conn| {
  98       Community::read_from_apub_id(conn, &cc)
  99     })
 100     .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 }