lemmy/crates/api/src/community/transfer.rs

120 lines
3.9 KiB
Rust

use crate::Perform;
use actix_web::web::Data;
use anyhow::Context;
use lemmy_api_common::{
community::{GetCommunityResponse, TransferCommunity},
utils::{blocking, get_local_user_view_from_jwt},
};
use lemmy_db_schema::{
source::{
community::{CommunityModerator, CommunityModeratorForm},
moderator::{ModTransferCommunity, ModTransferCommunityForm},
},
traits::{Crud, Joinable},
};
use lemmy_db_views_actor::structs::{CommunityModeratorView, CommunityView, PersonViewSafe};
use lemmy_utils::{location_info, ConnectionId, LemmyError};
use lemmy_websocket::LemmyContext;
// TODO: we dont do anything for federation here, it should be updated the next time the community
// gets fetched. i hope we can get rid of the community creator role soon.
#[async_trait::async_trait(?Send)]
impl Perform for TransferCommunity {
type Response = GetCommunityResponse;
#[tracing::instrument(skip(context, _websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<GetCommunityResponse, LemmyError> {
let data: &TransferCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
let admins = blocking(context.pool(), PersonViewSafe::admins).await??;
// Fetch the community mods
let community_id = data.community_id;
let mut community_mods = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await??;
// Make sure transferrer is either the top community mod, or an admin
if local_user_view.person.id != community_mods[0].moderator.id
&& !admins
.iter()
.map(|a| a.person.id)
.any(|x| x == local_user_view.person.id)
{
return Err(LemmyError::from_message("not_an_admin"));
}
// You have to re-do the community_moderator table, reordering it.
// Add the transferee to the top
let creator_index = community_mods
.iter()
.position(|r| r.moderator.id == data.person_id)
.context(location_info!())?;
let creator_person = community_mods.remove(creator_index);
community_mods.insert(0, creator_person);
// Delete all the mods
let community_id = data.community_id;
blocking(context.pool(), move |conn| {
CommunityModerator::delete_for_community(conn, community_id)
})
.await??;
// TODO: this should probably be a bulk operation
// Re-add the mods, in the new order
for cmod in &community_mods {
let community_moderator_form = CommunityModeratorForm {
community_id: cmod.community.id,
person_id: cmod.moderator.id,
};
let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
blocking(context.pool(), join)
.await?
.map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
}
// Mod tables
let form = ModTransferCommunityForm {
mod_person_id: local_user_view.person.id,
other_person_id: data.person_id,
community_id: data.community_id,
removed: Some(false),
};
blocking(context.pool(), move |conn| {
ModTransferCommunity::create(conn, &form)
})
.await??;
let community_id = data.community_id;
let person_id = local_user_view.person.id;
let community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(person_id))
})
.await?
.map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
let community_id = data.community_id;
let moderators = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await?
.map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
// Return the jwt
Ok(GetCommunityResponse {
community_view,
site: None,
moderators,
online: 0,
})
}
}