2 check_apub_id_valid_with_strictness,
4 objects::instance::fetch_instance_actor_for_object,
6 objects::{group::Group, Endpoints, LanguageTag},
11 use activitypub_federation::{
13 kinds::actor::GroupType,
14 traits::{Actor, Object},
16 use chrono::NaiveDateTime;
17 use itertools::Itertools;
18 use lemmy_api_common::{
19 context::LemmyContext,
20 utils::{generate_featured_url, generate_moderators_url, generate_outbox_url},
22 use lemmy_db_schema::{
24 actor_language::CommunityLanguage,
25 community::{Community, CommunityUpdateForm},
27 traits::{ApubActor, Crud},
29 use lemmy_db_views_actor::structs::CommunityFollowerView;
32 utils::{markdown::markdown_to_html, time::convert_datetime},
38 #[derive(Clone, Debug)]
39 pub struct ApubCommunity(Community);
41 impl Deref for ApubCommunity {
42 type Target = Community;
43 fn deref(&self) -> &Self::Target {
48 impl From<Community> for ApubCommunity {
49 fn from(c: Community) -> Self {
54 #[async_trait::async_trait]
55 impl Object for ApubCommunity {
56 type DataType = LemmyContext;
58 type Error = LemmyError;
60 fn last_refreshed_at(&self) -> Option<NaiveDateTime> {
61 Some(self.last_refreshed_at)
64 #[tracing::instrument(skip_all)]
65 async fn read_from_id(
67 context: &Data<Self::DataType>,
68 ) -> Result<Option<Self>, LemmyError> {
70 Community::read_from_apub_id(context.pool(), &object_id.into())
76 #[tracing::instrument(skip_all)]
77 async fn delete(self, context: &Data<Self::DataType>) -> Result<(), LemmyError> {
78 let form = CommunityUpdateForm::builder().deleted(Some(true)).build();
79 Community::update(context.pool(), self.id, &form).await?;
83 #[tracing::instrument(skip_all)]
84 async fn into_json(self, data: &Data<Self::DataType>) -> Result<Group, LemmyError> {
85 let community_id = self.id;
86 let langs = CommunityLanguage::read(data.pool(), community_id).await?;
87 let language = LanguageTag::new_multiple(langs, data.pool()).await?;
90 kind: GroupType::Group,
92 preferred_username: self.name.clone(),
93 name: Some(self.title.clone()),
94 summary: self.description.as_ref().map(|b| markdown_to_html(b)),
95 source: self.description.clone().map(Source::new),
96 icon: self.icon.clone().map(ImageObject::new),
97 image: self.banner.clone().map(ImageObject::new),
98 sensitive: Some(self.nsfw),
99 featured: Some(generate_featured_url(&self.actor_id)?.into()),
100 inbox: self.inbox_url.clone().into(),
101 outbox: generate_outbox_url(&self.actor_id)?.into(),
102 followers: self.followers_url.clone().into(),
103 endpoints: self.shared_inbox_url.clone().map(|s| Endpoints {
104 shared_inbox: s.into(),
106 public_key: self.public_key(),
108 published: Some(convert_datetime(self.published)),
109 updated: self.updated.map(convert_datetime),
110 posting_restricted_to_mods: Some(self.posting_restricted_to_mods),
111 attributed_to: Some(generate_moderators_url(&self.actor_id)?.into()),
116 #[tracing::instrument(skip_all)]
119 expected_domain: &Url,
120 context: &Data<Self::DataType>,
121 ) -> Result<(), LemmyError> {
122 group.verify(expected_domain, context).await
125 /// Converts a `Group` to `Community`, inserts it into the database and updates moderators.
126 #[tracing::instrument(skip_all)]
129 context: &Data<Self::DataType>,
130 ) -> Result<ApubCommunity, LemmyError> {
131 let instance_id = fetch_instance_actor_for_object(&group.id, context).await?;
133 let form = Group::into_insert_form(group.clone(), instance_id);
134 let languages = LanguageTag::to_language_id_multiple(group.language, context.pool()).await?;
136 let community = Community::create(context.pool(), &form).await?;
137 CommunityLanguage::update(context.pool(), languages, community.id).await?;
139 let community: ApubCommunity = community.into();
141 // Fetching mods and outbox is not necessary for Lemmy to work, so ignore errors. Besides,
142 // we need to ignore these errors so that tests can work entirely offline.
145 .dereference(&community, context)
147 .map_err(|e| debug!("{}", e))
150 if let Some(moderators) = group.attributed_to {
152 .dereference(&community, context)
154 .map_err(|e| debug!("{}", e))
162 impl Actor for ApubCommunity {
163 fn id(&self) -> Url {
164 self.actor_id.inner().clone()
167 fn public_key_pem(&self) -> &str {
171 fn private_key_pem(&self) -> Option<String> {
172 self.private_key.clone()
175 fn inbox(&self) -> Url {
176 self.inbox_url.clone().into()
179 fn shared_inbox(&self) -> Option<Url> {
180 self.shared_inbox_url.clone().map(Into::into)
185 /// For a given community, returns the inboxes of all followers.
186 #[tracing::instrument(skip_all)]
187 pub(crate) async fn get_follower_inboxes(
189 context: &LemmyContext,
190 ) -> Result<Vec<Url>, LemmyError> {
193 let local_site_data = fetch_local_site_data(context.pool()).await?;
194 let follows = CommunityFollowerView::for_community(context.pool(), id).await?;
195 let inboxes: Vec<Url> = follows
197 .filter(|f| !f.follower.local)
201 .unwrap_or(f.follower.inbox_url)
205 .filter(|inbox: &Url| inbox.host_str() != Some(&context.settings().hostname))
206 // Don't send to blocked instances
208 check_apub_id_valid_with_strictness(inbox, false, &local_site_data, context.settings())
218 pub(crate) mod tests {
221 objects::{instance::tests::parse_lemmy_instance, tests::init_context},
222 protocol::tests::file_to_json_object,
224 use activitypub_federation::fetch::collection_id::CollectionId;
225 use lemmy_db_schema::{source::site::Site, traits::Crud};
226 use serial_test::serial;
228 pub(crate) async fn parse_lemmy_community(context: &Data<LemmyContext>) -> ApubCommunity {
229 // use separate counter so this doesnt affect tests
230 let context2 = context.reset_request_count();
231 let mut json: Group = file_to_json_object("assets/lemmy/objects/group.json").unwrap();
232 // change these links so they dont fetch over the network
233 json.attributed_to = None;
235 CollectionId::parse("https://enterprise.lemmy.ml/c/tenforward/not_outbox").unwrap();
237 let url = Url::parse("https://enterprise.lemmy.ml/c/tenforward").unwrap();
238 ApubCommunity::verify(&json, &url, &context2).await.unwrap();
239 let community = ApubCommunity::from_json(json, &context2).await.unwrap();
240 // this makes one requests to the (intentionally broken) outbox collection
241 assert_eq!(context2.request_count(), 1);
247 async fn test_parse_lemmy_community() {
248 let context = init_context().await;
249 let site = parse_lemmy_instance(&context).await;
250 let community = parse_lemmy_community(&context).await;
252 assert_eq!(community.title, "Ten Forward");
253 assert!(!community.local);
254 assert_eq!(community.description.as_ref().unwrap().len(), 132);
256 Community::delete(context.pool(), community.id)
259 Site::delete(context.pool(), site.id).await.unwrap();