lemmy/crates/api_crud/src/community/create.rs

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4.8 KiB
Rust
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use crate::PerformCrud;
use activitypub_federation::core::{object_id::ObjectId, signatures::generate_actor_keypair};
use actix_web::web::Data;
use lemmy_api_common::{
community::{CommunityResponse, CreateCommunity},
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utils::{get_local_user_view_from_jwt, is_admin, local_site_to_slur_regex},
};
use lemmy_apub::{
generate_followers_url,
generate_inbox_url,
generate_local_apub_endpoint,
generate_shared_inbox_url,
objects::community::ApubCommunity,
EndpointType,
};
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use lemmy_db_schema::{
source::community::{
Community,
CommunityFollower,
CommunityFollowerForm,
CommunityInsertForm,
CommunityModerator,
CommunityModeratorForm,
},
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traits::{Crud, Followable, Joinable},
utils::diesel_option_overwrite_to_url_create,
};
use lemmy_db_views::structs::SiteView;
use lemmy_db_views_actor::structs::CommunityView;
use lemmy_utils::{
error::LemmyError,
utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
ConnectionId,
};
use lemmy_websocket::LemmyContext;
#[async_trait::async_trait(?Send)]
impl PerformCrud for CreateCommunity {
type Response = CommunityResponse;
#[tracing::instrument(skip(context, _websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<CommunityResponse, LemmyError> {
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let data: &CreateCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
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let site_view = SiteView::read_local(context.pool()).await?;
let local_site = site_view.local_site;
if local_site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
return Err(LemmyError::from_message(
"only_admins_can_create_communities",
));
}
// Check to make sure the icon and banners are urls
let icon = diesel_option_overwrite_to_url_create(&data.icon)?;
let banner = diesel_option_overwrite_to_url_create(&data.banner)?;
let slur_regex = local_site_to_slur_regex(&local_site);
check_slurs(&data.name, &slur_regex)?;
check_slurs(&data.title, &slur_regex)?;
check_slurs_opt(&data.description, &slur_regex)?;
if !is_valid_actor_name(&data.name, local_site.actor_name_max_length as usize) {
return Err(LemmyError::from_message("invalid_community_name"));
}
// Double check for duplicate community actor_ids
let community_actor_id = generate_local_apub_endpoint(
EndpointType::Community,
&data.name,
&context.settings().get_protocol_and_hostname(),
)?;
let community_actor_id_wrapped = ObjectId::<ApubCommunity>::new(community_actor_id.clone());
let community_dupe = community_actor_id_wrapped.dereference_local(context).await;
if community_dupe.is_ok() {
return Err(LemmyError::from_message("community_already_exists"));
}
// When you create a community, make sure the user becomes a moderator and a follower
let keypair = generate_actor_keypair()?;
let community_form = CommunityInsertForm::builder()
.name(data.name.to_owned())
.title(data.title.to_owned())
.description(data.description.to_owned())
.icon(icon)
.banner(banner)
.nsfw(data.nsfw)
.actor_id(Some(community_actor_id.to_owned()))
.private_key(Some(keypair.private_key))
.public_key(keypair.public_key)
.followers_url(Some(generate_followers_url(&community_actor_id)?))
.inbox_url(Some(generate_inbox_url(&community_actor_id)?))
.shared_inbox_url(Some(generate_shared_inbox_url(&community_actor_id)?))
.posting_restricted_to_mods(data.posting_restricted_to_mods)
.instance_id(site_view.site.instance_id)
.build();
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let inserted_community = Community::create(context.pool(), &community_form)
.await
.map_err(|e| LemmyError::from_error_message(e, "community_already_exists"))?;
// The community creator becomes a moderator
let community_moderator_form = CommunityModeratorForm {
community_id: inserted_community.id,
person_id: local_user_view.person.id,
};
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CommunityModerator::join(context.pool(), &community_moderator_form)
.await
.map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
// Follow your own community
let community_follower_form = CommunityFollowerForm {
community_id: inserted_community.id,
person_id: local_user_view.person.id,
pending: false,
};
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CommunityFollower::follow(context.pool(), &community_follower_form)
.await
.map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
let person_id = local_user_view.person.id;
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let community_view =
CommunityView::read(context.pool(), inserted_community.id, Some(person_id)).await?;
Ok(CommunityResponse { community_view })
}
}