use actix_web::web::{Data, Json};
use lemmy_api_common::{
  context::LemmyContext,
  site::GetFederatedInstancesResponse,
  utils::build_federated_instances,
};
use lemmy_db_views::structs::SiteView;
use lemmy_utils::{error::LemmyResult, LemmyErrorType};

#[tracing::instrument(skip(context))]
pub async fn get_federated_instances(
  context: Data<LemmyContext>,
) -> LemmyResult<Json<GetFederatedInstancesResponse>> {
  let site_view = SiteView::read_local(&mut context.pool())
    .await?
    .ok_or(LemmyErrorType::LocalSiteNotSetup)?;
  let federated_instances =
    build_federated_instances(&site_view.local_site, &mut context.pool()).await?;

  Ok(Json(GetFederatedInstancesResponse {
    federated_instances,
  }))
}