crates/api_crud/src/community/read.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   community::{GetCommunity, GetCommunityResponse},
   5   utils::{check_private_instance, get_local_user_view_from_jwt_opt},
   6 };
   7 use lemmy_apub::{
   8   fetcher::resolve_actor_identifier,
   9   objects::{community::ApubCommunity, instance::instance_actor_id_from_url},
  10 };
  11 use lemmy_db_schema::{
  12   impls::actor_language::default_post_language,
  13   source::{
  14     actor_language::CommunityLanguage,
  15     community::Community,
  16     local_site::LocalSite,
  17     site::Site,
  18   },
  19   traits::DeleteableOrRemoveable,
  20 };
  21 use lemmy_db_views_actor::structs::{CommunityModeratorView, CommunityView};
  22 use lemmy_utils::{error::LemmyError, ConnectionId};
  23 use lemmy_websocket::{messages::GetCommunityUsersOnline, LemmyContext};
  24
  25 #[async_trait::async_trait(?Send)]
  26 impl PerformCrud for GetCommunity {
  27   type Response = GetCommunityResponse;
  28
  29   #[tracing::instrument(skip(context, _websocket_id))]
  30   async fn perform(
  31     &self,
  32     context: &Data<LemmyContext>,
  33     _websocket_id: Option<ConnectionId>,
  34   ) -> Result<GetCommunityResponse, LemmyError> {
  35     let data: &GetCommunity = self;
  36     let local_user_view =
  37       get_local_user_view_from_jwt_opt(data.auth.as_ref(), context.pool(), context.secret())
  38         .await?;
  39     let local_site = LocalSite::read(context.pool()).await?;
  40
  41     if data.name.is_none() && data.id.is_none() {
  42       return Err(LemmyError::from_message("no_id_given"));
  43     }
  44
  45     check_private_instance(&local_user_view, &local_site)?;
  46
  47     let person_id = local_user_view.as_ref().map(|u| u.person.id);
  48
  49     let community_id = match data.id {
  50       Some(id) => id,
  51       None => {
  52         let name = data.name.clone().unwrap_or_else(|| "main".to_string());
  53         resolve_actor_identifier::<ApubCommunity, Community>(&name, context, true)
  54           .await
  55           .map_err(|e| e.with_message("couldnt_find_community"))?
  56           .id
  57       }
  58     };
  59
  60     let mut community_view = CommunityView::read(context.pool(), community_id, person_id)
  61       .await
  62       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  63
  64     // Blank out deleted or removed info for non-logged in users
  65     if person_id.is_none() && (community_view.community.deleted || community_view.community.removed)
  66     {
  67       community_view.community = community_view.community.blank_out_deleted_or_removed_info();
  68     }
  69
  70     let moderators = CommunityModeratorView::for_community(context.pool(), community_id)
  71       .await
  72       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  73
  74     let online = context
  75       .chat_server()
  76       .send(GetCommunityUsersOnline { community_id })
  77       .await
  78       .unwrap_or(1);
  79
  80     let site_id = instance_actor_id_from_url(community_view.community.actor_id.clone().into());
  81     let mut site = Site::read_from_apub_id(context.pool(), site_id).await?;
  82     // no need to include metadata for local site (its already available through other endpoints).
  83     // this also prevents us from leaking the federation private key.
  84     if let Some(s) = &site {
  85       if s.actor_id.domain() == Some(context.settings().hostname.as_ref()) {
  86         site = None;
  87       }
  88     }
  89
  90     let community_id = community_view.community.id;
  91     let discussion_languages = CommunityLanguage::read(context.pool(), community_id).await?;
  92     let default_post_language = if let Some(user) = local_user_view {
  93       default_post_language(context.pool(), community_id, user.local_user.id).await?
  94     } else {
  95       None
  96     };
  97
  98     let res = GetCommunityResponse {
  99       community_view,
 100       site,
 101       moderators,
 102       online,
 103       discussion_languages,
 104       default_post_language,
 105     };
 106
 107     // Return the jwt
 108     Ok(res)
 109   }
 110 }