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

   1 use crate::{
   2   activities::{
   3     community::send_activity_in_community,
   4     generate_activity_id,
   5     verify_add_remove_moderator_target,
   6     verify_is_public,
   7     verify_mod_action,
   8     verify_person_in_community,
   9   },
  10   activity_lists::AnnouncableActivities,
  11   generate_moderators_url,
  12   local_instance,
  13   objects::{community::ApubCommunity, person::ApubPerson},
  14   protocol::{activities::community::add_mod::AddMod, InCommunity},
  15   ActorType,
  16 };
  17 use activitypub_federation::{
  18   core::object_id::ObjectId,
  19   data::Data,
  20   traits::{ActivityHandler, Actor},
  21 };
  22 use activitystreams_kinds::{activity::AddType, public};
  23 use lemmy_api_common::LemmyContext;
  24 use lemmy_db_schema::{
  25   source::{
  26     community::{CommunityModerator, CommunityModeratorForm},
  27     moderator::{ModAddCommunity, ModAddCommunityForm},
  28   },
  29   traits::{Crud, Joinable},
  30 };
  31 use lemmy_utils::error::LemmyError;
  32 use url::Url;
  33
  34 impl AddMod {
  35   #[tracing::instrument(skip_all)]
  36   pub async fn send(
  37     community: &ApubCommunity,
  38     added_mod: &ApubPerson,
  39     actor: &ApubPerson,
  40     context: &LemmyContext,
  41   ) -> Result<(), LemmyError> {
  42     let id = generate_activity_id(
  43       AddType::Add,
  44       &context.settings().get_protocol_and_hostname(),
  45     )?;
  46     let add = AddMod {
  47       actor: ObjectId::new(actor.actor_id()),
  48       to: vec![public()],
  49       object: ObjectId::new(added_mod.actor_id()),
  50       target: generate_moderators_url(&community.actor_id)?.into(),
  51       cc: vec![community.actor_id()],
  52       kind: AddType::Add,
  53       id: id.clone(),
  54       audience: Some(ObjectId::new(community.actor_id())),
  55     };
  56
  57     let activity = AnnouncableActivities::AddMod(add);
  58     let inboxes = vec![added_mod.shared_inbox_or_inbox()];
  59     send_activity_in_community(activity, actor, community, inboxes, true, context).await
  60   }
  61 }
  62
  63 #[async_trait::async_trait(?Send)]
  64 impl ActivityHandler for AddMod {
  65   type DataType = LemmyContext;
  66   type Error = LemmyError;
  67
  68   fn id(&self) -> &Url {
  69     &self.id
  70   }
  71
  72   fn actor(&self) -> &Url {
  73     self.actor.inner()
  74   }
  75
  76   #[tracing::instrument(skip_all)]
  77   async fn verify(
  78     &self,
  79     context: &Data<LemmyContext>,
  80     request_counter: &mut i32,
  81   ) -> Result<(), LemmyError> {
  82     verify_is_public(&self.to, &self.cc)?;
  83     let community = self.community(context, request_counter).await?;
  84     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  85     verify_mod_action(
  86       &self.actor,
  87       self.object.inner(),
  88       community.id,
  89       context,
  90       request_counter,
  91     )
  92     .await?;
  93     verify_add_remove_moderator_target(&self.target, &community)?;
  94     Ok(())
  95   }
  96
  97   #[tracing::instrument(skip_all)]
  98   async fn receive(
  99     self,
 100     context: &Data<LemmyContext>,
 101     request_counter: &mut i32,
 102   ) -> Result<(), LemmyError> {
 103     let community = self.community(context, request_counter).await?;
 104     let new_mod = self
 105       .object
 106       .dereference(context, local_instance(context).await, request_counter)
 107       .await?;
 108
 109     // If we had to refetch the community while parsing the activity, then the new mod has already
 110     // been added. Skip it here as it would result in a duplicate key error.
 111     let new_mod_id = new_mod.id;
 112     let moderated_communities =
 113       CommunityModerator::get_person_moderated_communities(context.pool(), new_mod_id).await?;
 114     if !moderated_communities.contains(&community.id) {
 115       let form = CommunityModeratorForm {
 116         community_id: community.id,
 117         person_id: new_mod.id,
 118       };
 119       CommunityModerator::join(context.pool(), &form).await?;
 120
 121       // write mod log
 122       let actor = self
 123         .actor
 124         .dereference(context, local_instance(context).await, request_counter)
 125         .await?;
 126       let form = ModAddCommunityForm {
 127         mod_person_id: actor.id,
 128         other_person_id: new_mod.id,
 129         community_id: community.id,
 130         removed: Some(false),
 131       };
 132       ModAddCommunity::create(context.pool(), &form).await?;
 133     }
 134     // TODO: send websocket notification about added mod
 135     Ok(())
 136   }
 137 }