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};
  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))]
  26   async fn perform(
  27     &self,
  28     context: &Data<LemmyContext>,
  29   ) -> Result<GetCommunityResponse, LemmyError> {
  30     let data: &TransferCommunity = self;
  31     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  32
  33     // Fetch the community mods
  34     let community_id = data.community_id;
  35     let mut community_mods =
  36       CommunityModeratorView::for_community(context.pool(), community_id).await?;
  37
  38     // Make sure transferrer is either the top community mod, or an admin
  39     if !(is_top_mod(&local_user_view, &community_mods).is_ok()
  40       || is_admin(&local_user_view).is_ok())
  41     {
  42       return Err(LemmyError::from_message("not_an_admin"));
  43     }
  44
  45     // You have to re-do the community_moderator table, reordering it.
  46     // Add the transferee to the top
  47     let creator_index = community_mods
  48       .iter()
  49       .position(|r| r.moderator.id == data.person_id)
  50       .context(location_info!())?;
  51     let creator_person = community_mods.remove(creator_index);
  52     community_mods.insert(0, creator_person);
  53
  54     // Delete all the mods
  55     let community_id = data.community_id;
  56
  57     CommunityModerator::delete_for_community(context.pool(), community_id).await?;
  58
  59     // TODO: this should probably be a bulk operation
  60     // Re-add the mods, in the new order
  61     for cmod in &community_mods {
  62       let community_moderator_form = CommunityModeratorForm {
  63         community_id: cmod.community.id,
  64         person_id: cmod.moderator.id,
  65       };
  66
  67       CommunityModerator::join(context.pool(), &community_moderator_form)
  68         .await
  69         .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
  70     }
  71
  72     // Mod tables
  73     let form = ModTransferCommunityForm {
  74       mod_person_id: local_user_view.person.id,
  75       other_person_id: data.person_id,
  76       community_id: data.community_id,
  77     };
  78
  79     ModTransferCommunity::create(context.pool(), &form).await?;
  80
  81     let community_id = data.community_id;
  82     let person_id = local_user_view.person.id;
  83     let community_view = CommunityView::read(context.pool(), community_id, Some(person_id), None)
  84       .await
  85       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  86
  87     let community_id = data.community_id;
  88     let moderators = CommunityModeratorView::for_community(context.pool(), community_id)
  89       .await
  90       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  91
  92     // Return the jwt
  93     Ok(GetCommunityResponse {
  94       community_view,
  95       site: None,
  96       moderators,
  97       discussion_languages: vec![],
  98     })
  99   }
 100 }