use activitypub_federation::{config::Data, http_signatures::generate_actor_keypair}; use actix_web::web::Json; use lemmy_api_common::{ build_response::build_community_response, community::{CommunityResponse, CreateCommunity}, context::LemmyContext, utils::{ generate_followers_url, generate_inbox_url, generate_local_apub_endpoint, generate_shared_inbox_url, is_admin, local_site_to_slur_regex, local_user_view_from_jwt, sanitize_html, sanitize_html_opt, EndpointType, }, }; use lemmy_db_schema::{ source::{ actor_language::{CommunityLanguage, SiteLanguage}, community::{ Community, CommunityFollower, CommunityFollowerForm, CommunityInsertForm, CommunityModerator, CommunityModeratorForm, }, }, traits::{ApubActor, Crud, Followable, Joinable}, utils::diesel_option_overwrite_to_url_create, }; use lemmy_db_views::structs::SiteView; use lemmy_utils::{ error::{LemmyError, LemmyErrorExt, LemmyErrorType}, utils::{ slurs::{check_slurs, check_slurs_opt}, validation::{is_valid_actor_name, is_valid_body_field}, }, }; #[tracing::instrument(skip(context))] pub async fn create_community( data: Json, context: Data, ) -> Result, LemmyError> { let local_user_view = local_user_view_from_jwt(&data.auth, &context).await?; let site_view = SiteView::read_local(&mut 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(LemmyErrorType::OnlyAdminsCanCreateCommunities)?; } // 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 name = sanitize_html(&data.name); let title = sanitize_html(&data.title); let description = sanitize_html_opt(&data.description); let slur_regex = local_site_to_slur_regex(&local_site); check_slurs(&name, &slur_regex)?; check_slurs(&title, &slur_regex)?; check_slurs_opt(&description, &slur_regex)?; is_valid_actor_name(&data.name, local_site.actor_name_max_length as usize)?; is_valid_body_field(&data.description, false)?; // 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_dupe = Community::read_from_apub_id(&mut context.pool(), &community_actor_id).await?; if community_dupe.is_some() { return Err(LemmyErrorType::CommunityAlreadyExists)?; } // 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(name) .title(title) .description(description) .icon(icon) .banner(banner) .nsfw(data.nsfw) .actor_id(Some(community_actor_id.clone())) .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(); let inserted_community = Community::create(&mut context.pool(), &community_form) .await .with_lemmy_type(LemmyErrorType::CommunityAlreadyExists)?; // The community creator becomes a moderator let community_moderator_form = CommunityModeratorForm { community_id: inserted_community.id, person_id: local_user_view.person.id, }; CommunityModerator::join(&mut context.pool(), &community_moderator_form) .await .with_lemmy_type(LemmyErrorType::CommunityModeratorAlreadyExists)?; // Follow your own community let community_follower_form = CommunityFollowerForm { community_id: inserted_community.id, person_id: local_user_view.person.id, pending: false, }; CommunityFollower::follow(&mut context.pool(), &community_follower_form) .await .with_lemmy_type(LemmyErrorType::CommunityFollowerAlreadyExists)?; // Update the discussion_languages if that's provided let community_id = inserted_community.id; if let Some(languages) = data.discussion_languages.clone() { let site_languages = SiteLanguage::read_local_raw(&mut context.pool()).await?; // check that community languages are a subset of site languages // https://stackoverflow.com/a/64227550 let is_subset = languages.iter().all(|item| site_languages.contains(item)); if !is_subset { return Err(LemmyErrorType::LanguageNotAllowed)?; } CommunityLanguage::update(&mut context.pool(), languages, community_id).await?; } build_community_response(&context, local_user_view, community_id).await }