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

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use crate::Perform;
use actix_web::web::Data;
use anyhow::Context;
use lemmy_api_common::{
community::{GetCommunityResponse, TransferCommunity},
context::LemmyContext,
utils::{is_admin, is_top_mod, local_user_view_from_jwt},
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};
use lemmy_db_schema::{
source::{
community::{CommunityModerator, CommunityModeratorForm},
moderator::{ModTransferCommunity, ModTransferCommunityForm},
},
traits::{Crud, Joinable},
};
use lemmy_db_views_actor::structs::{CommunityModeratorView, CommunityView};
use lemmy_utils::{error::LemmyError, location_info};
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// 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))]
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async fn perform(
&self,
context: &Data<LemmyContext>,
) -> Result<GetCommunityResponse, LemmyError> {
let data: &TransferCommunity = self;
let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
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// Fetch the community mods
let community_id = data.community_id;
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let mut community_mods =
CommunityModeratorView::for_community(context.pool(), community_id).await?;
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// Make sure transferrer is either the top community mod, or an admin
if !(is_top_mod(&local_user_view, &community_mods).is_ok()
|| is_admin(&local_user_view).is_ok())
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{
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;
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CommunityModerator::delete_for_community(context.pool(), community_id).await?;
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// 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,
};
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CommunityModerator::join(context.pool(), &community_moderator_form)
.await
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.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,
};
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ModTransferCommunity::create(context.pool(), &form).await?;
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let community_id = data.community_id;
let person_id = local_user_view.person.id;
let community_view = CommunityView::read(context.pool(), community_id, Some(person_id), None)
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.await
.map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
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let community_id = data.community_id;
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let moderators = CommunityModeratorView::for_community(context.pool(), community_id)
.await
.map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
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// Return the jwt
Ok(GetCommunityResponse {
community_view,
site: None,
moderators,
discussion_languages: vec![],
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})
}
}