crates/api/src/community/transfer.rs

   1 use crate::Perform;
   2 use actix_web::web::Data;
   3 use anyhow::Context;
   4 use lemmy_api_common::{
   5   community::{GetCommunityResponse, TransferCommunity},
   6   utils::get_local_user_view_from_jwt,
   7   LemmyContext,
   8 };
   9 use lemmy_db_schema::{
  10   source::{
  11     community::{CommunityModerator, CommunityModeratorForm},
  12     moderator::{ModTransferCommunity, ModTransferCommunityForm},
  13   },
  14   traits::{Crud, Joinable},
  15 };
  16 use lemmy_db_views_actor::structs::{CommunityModeratorView, CommunityView, PersonViewSafe};
  17 use lemmy_utils::{error::LemmyError, location_info, ConnectionId};
  18
  19 // TODO: we dont do anything for federation here, it should be updated the next time the community
  20 //       gets fetched. i hope we can get rid of the community creator role soon.
  21 #[async_trait::async_trait(?Send)]
  22 impl Perform for TransferCommunity {
  23   type Response = GetCommunityResponse;
  24
  25   #[tracing::instrument(skip(context, _websocket_id))]
  26   async fn perform(
  27     &self,
  28     context: &Data<LemmyContext>,
  29     _websocket_id: Option<ConnectionId>,
  30   ) -> Result<GetCommunityResponse, LemmyError> {
  31     let data: &TransferCommunity = self;
  32     let local_user_view =
  33       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  34
  35     let admins = PersonViewSafe::admins(context.pool()).await?;
  36
  37     // Fetch the community mods
  38     let community_id = data.community_id;
  39     let mut community_mods =
  40       CommunityModeratorView::for_community(context.pool(), community_id).await?;
  41
  42     // Make sure transferrer is either the top community mod, or an admin
  43     if local_user_view.person.id != community_mods[0].moderator.id
  44       && !admins
  45         .iter()
  46         .map(|a| a.person.id)
  47         .any(|x| x == local_user_view.person.id)
  48     {
  49       return Err(LemmyError::from_message("not_an_admin"));
  50     }
  51
  52     // You have to re-do the community_moderator table, reordering it.
  53     // Add the transferee to the top
  54     let creator_index = community_mods
  55       .iter()
  56       .position(|r| r.moderator.id == data.person_id)
  57       .context(location_info!())?;
  58     let creator_person = community_mods.remove(creator_index);
  59     community_mods.insert(0, creator_person);
  60
  61     // Delete all the mods
  62     let community_id = data.community_id;
  63
  64     CommunityModerator::delete_for_community(context.pool(), community_id).await?;
  65
  66     // TODO: this should probably be a bulk operation
  67     // Re-add the mods, in the new order
  68     for cmod in &community_mods {
  69       let community_moderator_form = CommunityModeratorForm {
  70         community_id: cmod.community.id,
  71         person_id: cmod.moderator.id,
  72       };
  73
  74       CommunityModerator::join(context.pool(), &community_moderator_form)
  75         .await
  76         .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
  77     }
  78
  79     // Mod tables
  80     let form = ModTransferCommunityForm {
  81       mod_person_id: local_user_view.person.id,
  82       other_person_id: data.person_id,
  83       community_id: data.community_id,
  84       removed: Some(false),
  85     };
  86
  87     ModTransferCommunity::create(context.pool(), &form).await?;
  88
  89     let community_id = data.community_id;
  90     let person_id = local_user_view.person.id;
  91     let community_view = CommunityView::read(context.pool(), community_id, Some(person_id))
  92       .await
  93       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  94
  95     let community_id = data.community_id;
  96     let moderators = CommunityModeratorView::for_community(context.pool(), community_id)
  97       .await
  98       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  99
 100     // Return the jwt
 101     Ok(GetCommunityResponse {
 102       community_view,
 103       site: None,
 104       moderators,
 105       online: 0,
 106       discussion_languages: vec![],
 107       default_post_language: None,
 108     })
 109   }
 110 }