lemmy/crates/apub/src/objects/instance.rs

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use crate::{
check_apub_id_valid_with_strictness,
fetch_local_site_data,
local_instance,
objects::read_from_string_or_source_opt,
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protocol::{
objects::{
instance::{Instance, InstanceType},
LanguageTag,
},
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ImageObject,
Source,
},
ActorType,
};
use activitypub_federation::{
core::object_id::ObjectId,
deser::values::MediaTypeHtml,
traits::{Actor, ApubObject},
utils::verify_domains_match,
};
use chrono::NaiveDateTime;
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use lemmy_api_common::{utils::local_site_opt_to_slur_regex, LemmyContext};
use lemmy_db_schema::{
source::{
actor_language::SiteLanguage,
instance::Instance as DbInstance,
site::{Site, SiteInsertForm},
},
traits::Crud,
utils::{naive_now, DbPool},
};
use lemmy_utils::{
error::LemmyError,
utils::{check_slurs, check_slurs_opt, convert_datetime, markdown_to_html},
};
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<Site> for ApubSite {
fn from(s: Site) -> Self {
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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<NaiveDateTime> {
Some(self.last_refreshed_at)
}
#[tracing::instrument(skip_all)]
async fn read_from_apub_id(
object_id: Url,
data: &Self::DataType,
) -> Result<Option<Self>, LemmyError> {
Ok(
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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<Self::ApubType, LemmyError> {
let site_id = self.id;
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let langs = SiteLanguage::read(data.pool(), site_id).await?;
let language = LanguageTag::new_multiple(langs, data.pool()).await?;
let instance = Instance {
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kind: InstanceType::Service,
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> {
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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<Self, LemmyError> {
let apub_id = apub.id.inner().clone();
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let instance = DbInstance::create_from_actor_id(data.pool(), &apub_id).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?;
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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<String> {
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()
}
}
/// Instance actor is at the root path, so we simply need to clear the path and other unnecessary
/// parts of the url.
pub fn instance_actor_id_from_url(mut url: Url) -> Url {
url.set_fragment(None);
url.set_path("");
url.set_query(None);
url
}
/// try to fetch the instance actor (to make things like instance rules available)
pub(in crate::objects) async fn fetch_instance_actor_for_object(
object_id: Url,
context: &LemmyContext,
request_counter: &mut i32,
) {
// try to fetch the instance actor (to make things like instance rules available)
let instance_id = instance_actor_id_from_url(object_id);
let site = ObjectId::<ApubSite>::new(instance_id.clone())
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.dereference(context, local_instance(context).await, request_counter)
.await;
if let Err(e) = site {
debug!("Failed to dereference site for {}: {}", instance_id, e);
}
}
pub(crate) async fn remote_instance_inboxes(pool: &DbPool) -> Result<Vec<Url>, LemmyError> {
Ok(
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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() {
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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);
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Site::delete(context.pool(), site.id).await.unwrap();
}
}