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   context::LemmyContext,
   7   utils::{is_admin, is_top_mod, local_user_view_from_jwt},
   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};
  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 = local_user_view_from_jwt(&data.auth, context).await?;
  33
  34     // Fetch the community mods
  35     let community_id = data.community_id;
  36     let mut community_mods =
  37       CommunityModeratorView::for_community(context.pool(), community_id).await?;
  38
  39     // Make sure transferrer is either the top community mod, or an admin
  40     if !(is_top_mod(&local_user_view, &community_mods).is_ok()
  41       || is_admin(&local_user_view).is_ok())
  42     {
  43       return Err(LemmyError::from_message("not_an_admin"));
  44     }
  45
  46     // You have to re-do the community_moderator table, reordering it.
  47     // Add the transferee to the top
  48     let creator_index = community_mods
  49       .iter()
  50       .position(|r| r.moderator.id == data.person_id)
  51       .context(location_info!())?;
  52     let creator_person = community_mods.remove(creator_index);
  53     community_mods.insert(0, creator_person);
  54
  55     // Delete all the mods
  56     let community_id = data.community_id;
  57
  58     CommunityModerator::delete_for_community(context.pool(), community_id).await?;
  59
  60     // TODO: this should probably be a bulk operation
  61     // Re-add the mods, in the new order
  62     for cmod in &community_mods {
  63       let community_moderator_form = CommunityModeratorForm {
  64         community_id: cmod.community.id,
  65         person_id: cmod.moderator.id,
  66       };
  67
  68       CommunityModerator::join(context.pool(), &community_moderator_form)
  69         .await
  70         .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
  71     }
  72
  73     // Mod tables
  74     let form = ModTransferCommunityForm {
  75       mod_person_id: local_user_view.person.id,
  76       other_person_id: data.person_id,
  77       community_id: data.community_id,
  78     };
  79
  80     ModTransferCommunity::create(context.pool(), &form).await?;
  81
  82     let community_id = data.community_id;
  83     let person_id = local_user_view.person.id;
  84     let community_view = CommunityView::read(context.pool(), community_id, Some(person_id), None)
  85       .await
  86       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  87
  88     let community_id = data.community_id;
  89     let moderators = CommunityModeratorView::for_community(context.pool(), community_id)
  90       .await
  91       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  92
  93     // Return the jwt
  94     Ok(GetCommunityResponse {
  95       community_view,
  96       site: None,
  97       moderators,
  98       online: 0,
  99       discussion_languages: vec![],
 100     })
 101   }
 102 }