use crate::{ check_apub_id_valid_with_strictness, fetch_local_site_data, local_instance, objects::read_from_string_or_source_opt, protocol::{ objects::{instance::Instance, LanguageTag}, ImageObject, Source, }, ActorType, }; use activitypub_federation::{ core::object_id::ObjectId, deser::values::MediaTypeHtml, traits::{Actor, ApubObject}, utils::verify_domains_match, }; use activitystreams_kinds::actor::ApplicationType; use chrono::NaiveDateTime; use lemmy_api_common::{context::LemmyContext, utils::local_site_opt_to_slur_regex}; use lemmy_db_schema::{ newtypes::InstanceId, source::{ actor_language::SiteLanguage, instance::Instance as DbInstance, site::{Site, SiteInsertForm}, }, traits::Crud, utils::{naive_now, DbPool}, }; use lemmy_utils::{ error::LemmyError, utils::{ markdown::markdown_to_html, slurs::{check_slurs, check_slurs_opt}, time::convert_datetime, }, }; use std::ops::Deref; use tracing::debug; use url::Url; #[derive(Clone, Debug)] pub struct ApubSite(Site); impl Deref for ApubSite { type Target = Site; fn deref(&self) -> &Self::Target { &self.0 } } impl From for ApubSite { fn from(s: Site) -> Self { ApubSite(s) } } #[async_trait::async_trait(?Send)] impl ApubObject for ApubSite { type DataType = LemmyContext; type ApubType = Instance; type DbType = Site; type Error = LemmyError; fn last_refreshed_at(&self) -> Option { Some(self.last_refreshed_at) } #[tracing::instrument(skip_all)] async fn read_from_apub_id( object_id: Url, data: &Self::DataType, ) -> Result, LemmyError> { Ok( Site::read_from_apub_id(data.pool(), object_id) .await? .map(Into::into), ) } async fn delete(self, _data: &Self::DataType) -> Result<(), LemmyError> { unimplemented!() } #[tracing::instrument(skip_all)] async fn into_apub(self, data: &Self::DataType) -> Result { let site_id = self.id; let langs = SiteLanguage::read(data.pool(), site_id).await?; let language = LanguageTag::new_multiple(langs, data.pool()).await?; let instance = Instance { kind: ApplicationType::Application, id: ObjectId::new(self.actor_id()), name: self.name.clone(), content: self.sidebar.as_ref().map(|d| markdown_to_html(d)), source: self.sidebar.clone().map(Source::new), summary: self.description.clone(), media_type: self.sidebar.as_ref().map(|_| MediaTypeHtml::Html), icon: self.icon.clone().map(ImageObject::new), image: self.banner.clone().map(ImageObject::new), inbox: self.inbox_url.clone().into(), outbox: Url::parse(&format!("{}/site_outbox", self.actor_id))?, public_key: self.get_public_key(), language, published: convert_datetime(self.published), updated: self.updated.map(convert_datetime), }; Ok(instance) } #[tracing::instrument(skip_all)] async fn verify( apub: &Self::ApubType, expected_domain: &Url, data: &Self::DataType, _request_counter: &mut i32, ) -> Result<(), LemmyError> { let local_site_data = fetch_local_site_data(data.pool()).await?; check_apub_id_valid_with_strictness(apub.id.inner(), true, &local_site_data, data.settings())?; verify_domains_match(expected_domain, apub.id.inner())?; let slur_regex = &local_site_opt_to_slur_regex(&local_site_data.local_site); check_slurs(&apub.name, slur_regex)?; check_slurs_opt(&apub.summary, slur_regex)?; Ok(()) } #[tracing::instrument(skip_all)] async fn from_apub( apub: Self::ApubType, data: &Self::DataType, _request_counter: &mut i32, ) -> Result { let domain = apub.id.inner().domain().expect("group id has domain"); let instance = DbInstance::read_or_create(data.pool(), domain.to_string()).await?; let site_form = SiteInsertForm { name: apub.name.clone(), sidebar: read_from_string_or_source_opt(&apub.content, &None, &apub.source), updated: apub.updated.map(|u| u.clone().naive_local()), icon: apub.icon.clone().map(|i| i.url.into()), banner: apub.image.clone().map(|i| i.url.into()), description: apub.summary.clone(), actor_id: Some(apub.id.clone().into()), last_refreshed_at: Some(naive_now()), inbox_url: Some(apub.inbox.clone().into()), public_key: Some(apub.public_key.public_key_pem.clone()), private_key: None, instance_id: instance.id, }; let languages = LanguageTag::to_language_id_multiple(apub.language, data.pool()).await?; let site = Site::create(data.pool(), &site_form).await?; SiteLanguage::update(data.pool(), languages, &site).await?; Ok(site.into()) } } impl ActorType for ApubSite { fn actor_id(&self) -> Url { self.actor_id.clone().into() } fn private_key(&self) -> Option { self.private_key.clone() } } impl Actor for ApubSite { fn public_key(&self) -> &str { &self.public_key } fn inbox(&self) -> Url { self.inbox_url.clone().into() } } /// Try to fetch the instance actor (to make things like instance rules available). pub(in crate::objects) async fn fetch_instance_actor_for_object + Clone>( object_id: &T, context: &LemmyContext, request_counter: &mut i32, ) -> Result { let object_id: Url = object_id.clone().into(); let instance_id = Site::instance_actor_id_from_url(object_id); let site = ObjectId::::new(instance_id.clone()) .dereference(context, local_instance(context).await, request_counter) .await; match site { Ok(s) => Ok(s.instance_id), Err(e) => { // Failed to fetch instance actor, its probably not a lemmy instance debug!("Failed to dereference site for {}: {}", &instance_id, e); let domain = instance_id.domain().expect("has domain"); Ok( DbInstance::read_or_create(context.pool(), domain.to_string()) .await? .id, ) } } } pub(crate) async fn remote_instance_inboxes(pool: &DbPool) -> Result, LemmyError> { Ok( Site::read_remote_sites(pool) .await? .into_iter() .map(|s| ApubSite::from(s).shared_inbox_or_inbox()) .collect(), ) } #[cfg(test)] pub(crate) mod tests { use super::*; use crate::{objects::tests::init_context, protocol::tests::file_to_json_object}; use lemmy_db_schema::traits::Crud; use serial_test::serial; pub(crate) async fn parse_lemmy_instance(context: &LemmyContext) -> ApubSite { let json: Instance = file_to_json_object("assets/lemmy/objects/instance.json").unwrap(); let id = Url::parse("https://enterprise.lemmy.ml/").unwrap(); let mut request_counter = 0; ApubSite::verify(&json, &id, context, &mut request_counter) .await .unwrap(); let site = ApubSite::from_apub(json, context, &mut request_counter) .await .unwrap(); assert_eq!(request_counter, 0); site } #[actix_rt::test] #[serial] async fn test_parse_lemmy_instance() { let context = init_context().await; let site = parse_lemmy_instance(&context).await; assert_eq!(site.name, "Enterprise"); assert_eq!(site.description.as_ref().unwrap().len(), 15); Site::delete(context.pool(), site.id).await.unwrap(); } }