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

   1 use activitystreams::{activity::kind::UpdateType, public, unparsed::Unparsed};
   2 use serde::{Deserialize, Serialize};
   3 use url::Url;
   4
   5 use lemmy_api_common::blocking;
   6 use lemmy_apub_lib::{
   7   data::Data,
   8   traits::{ActivityFields, ActivityHandler, ActorType, ApubObject},
   9 };
  10 use lemmy_db_schema::{
  11   source::community::{Community, CommunityForm},
  12   traits::Crud,
  13 };
  14 use lemmy_utils::LemmyError;
  15 use lemmy_websocket::{send::send_community_ws_message, LemmyContext, UserOperationCrud};
  16
  17 use crate::{
  18   activities::{
  19     community::{
  20       announce::{AnnouncableActivities, GetCommunity},
  21       send_to_community,
  22     },
  23     generate_activity_id,
  24     verify_activity,
  25     verify_is_public,
  26     verify_mod_action,
  27     verify_person_in_community,
  28   },
  29   fetcher::object_id::ObjectId,
  30   objects::{community::ApubCommunity, person::ApubPerson},
  31   protocol::objects::group::Group,
  32 };
  33
  34 /// This activity is received from a remote community mod, and updates the description or other
  35 /// fields of a local community.
  36 #[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
  37 #[serde(rename_all = "camelCase")]
  38 pub struct UpdateCommunity {
  39   actor: ObjectId<ApubPerson>,
  40   to: Vec<Url>,
  41   // TODO: would be nice to use a separate struct here, which only contains the fields updated here
  42   object: Group,
  43   cc: Vec<Url>,
  44   #[serde(rename = "type")]
  45   kind: UpdateType,
  46   id: Url,
  47   #[serde(flatten)]
  48   unparsed: Unparsed,
  49 }
  50
  51 impl UpdateCommunity {
  52   pub async fn send(
  53     community: &ApubCommunity,
  54     actor: &ApubPerson,
  55     context: &LemmyContext,
  56   ) -> Result<(), LemmyError> {
  57     let id = generate_activity_id(
  58       UpdateType::Update,
  59       &context.settings().get_protocol_and_hostname(),
  60     )?;
  61     let update = UpdateCommunity {
  62       actor: ObjectId::new(actor.actor_id()),
  63       to: vec![public()],
  64       object: community.to_apub(context).await?,
  65       cc: vec![community.actor_id()],
  66       kind: UpdateType::Update,
  67       id: id.clone(),
  68       unparsed: Default::default(),
  69     };
  70
  71     let activity = AnnouncableActivities::UpdateCommunity(Box::new(update));
  72     send_to_community(activity, &id, actor, community, vec![], context).await
  73   }
  74 }
  75
  76 #[async_trait::async_trait(?Send)]
  77 impl ActivityHandler for UpdateCommunity {
  78   type DataType = LemmyContext;
  79   async fn verify(
  80     &self,
  81     context: &Data<LemmyContext>,
  82     request_counter: &mut i32,
  83   ) -> Result<(), LemmyError> {
  84     verify_is_public(&self.to)?;
  85     verify_activity(self, &context.settings())?;
  86     let community = self.get_community(context, request_counter).await?;
  87     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  88     verify_mod_action(&self.actor, &community, context, request_counter).await?;
  89     Ok(())
  90   }
  91
  92   async fn receive(
  93     self,
  94     context: &Data<LemmyContext>,
  95     request_counter: &mut i32,
  96   ) -> Result<(), LemmyError> {
  97     let community = self.get_community(context, request_counter).await?;
  98
  99     let updated_community = Group::from_apub_to_form(
 100       &self.object,
 101       &community.actor_id.clone().into(),
 102       &context.settings(),
 103     )
 104     .await?;
 105     let cf = CommunityForm {
 106       name: updated_community.name,
 107       title: updated_community.title,
 108       description: updated_community.description,
 109       nsfw: updated_community.nsfw,
 110       // TODO: icon and banner would be hosted on the other instance, ideally we would copy it to ours
 111       icon: updated_community.icon,
 112       banner: updated_community.banner,
 113       ..CommunityForm::default()
 114     };
 115     let updated_community = blocking(context.pool(), move |conn| {
 116       Community::update(conn, community.id, &cf)
 117     })
 118     .await??;
 119
 120     send_community_ws_message(
 121       updated_community.id,
 122       UserOperationCrud::EditCommunity,
 123       None,
 124       None,
 125       context,
 126     )
 127     .await?;
 128     Ok(())
 129   }
 130 }
 131
 132 #[async_trait::async_trait(?Send)]
 133 impl GetCommunity for UpdateCommunity {
 134   async fn get_community(
 135     &self,
 136     context: &LemmyContext,
 137     request_counter: &mut i32,
 138   ) -> Result<ApubCommunity, LemmyError> {
 139     let cid = ObjectId::new(self.object.id.clone());
 140     cid.dereference(context, request_counter).await
 141   }
 142 }