lemmy/server/src/apub/community.rs

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use super::*;
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#[derive(Deserialize)]
pub struct CommunityQuery {
community_name: String,
}
impl ToApub for Community {
type Response = GroupExt;
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// Turn a Lemmy Community into an ActivityPub group that can be sent out over the network.
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fn to_apub(&self, conn: &PgConnection) -> Result<GroupExt, Error> {
let mut group = Group::default();
let oprops: &mut ObjectProperties = group.as_mut();
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let creator = User_::read(conn, self.creator_id)?;
oprops
.set_context_xsd_any_uri(context())?
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.set_id(self.actor_id.to_owned())?
.set_name_xsd_string(self.name.to_owned())?
.set_published(convert_datetime(self.published))?
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.set_attributed_to_xsd_any_uri(creator.actor_id)?;
if let Some(u) = self.updated.to_owned() {
oprops.set_updated(convert_datetime(u))?;
}
if let Some(d) = self.description.to_owned() {
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// TODO: this should be html, also add source field with raw markdown
// -> same for post.content and others
oprops.set_summary_xsd_string(d)?;
}
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let mut actor_props = ApActorProperties::default();
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actor_props
.set_preferred_username(self.title.to_owned())?
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.set_inbox(self.get_inbox_url())?
.set_outbox(self.get_outbox_url())?
.set_followers(self.get_followers_url())?;
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let public_key = PublicKey {
id: format!("{}#main-key", self.actor_id),
owner: self.actor_id.to_owned(),
public_key_pem: self.public_key.to_owned().unwrap(),
};
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Ok(group.extend(actor_props).extend(public_key.to_ext()))
}
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}
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impl ActorType for Community {
fn actor_id(&self) -> String {
self.actor_id.to_owned()
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}
}
impl FromApub for CommunityForm {
type ApubType = GroupExt;
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/// Parse an ActivityPub group received from another instance into a Lemmy community.
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fn from_apub(group: &GroupExt, conn: &PgConnection) -> Result<Self, Error> {
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let oprops = &group.base.base.object_props;
let aprops = &group.base.extension;
let public_key: &PublicKey = &group.extension.public_key;
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let _followers_uri = Url::parse(&aprops.get_followers().unwrap().to_string())?;
let _outbox_uri = Url::parse(&aprops.get_outbox().to_string())?;
// TODO don't do extra fetching here
// let _outbox = fetch_remote_object::<OrderedCollection>(&outbox_uri)?;
// let _followers = fetch_remote_object::<UnorderedCollection>(&followers_uri)?;
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let apub_id = &oprops.get_attributed_to_xsd_any_uri().unwrap().to_string();
let creator = get_or_fetch_and_upsert_remote_user(&apub_id, conn)?;
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Ok(CommunityForm {
name: oprops.get_name_xsd_string().unwrap().to_string(),
title: aprops.get_preferred_username().unwrap().to_string(),
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// TODO: should be parsed as html and tags like <script> removed (or use markdown source)
// -> same for post.content etc
description: oprops.get_content_xsd_string().map(|s| s.to_string()),
category_id: 1, // -> peertube uses `"category": {"identifier": "9","name": "Comedy"},`
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creator_id: creator.id,
removed: None,
published: oprops
.get_published()
.map(|u| u.as_ref().to_owned().naive_local()),
updated: oprops
.get_updated()
.map(|u| u.as_ref().to_owned().naive_local()),
deleted: None,
nsfw: false,
actor_id: oprops.get_id().unwrap().to_string(),
local: false,
private_key: None,
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public_key: Some(public_key.to_owned().public_key_pem),
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last_refreshed_at: Some(naive_now()),
})
}
}
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/// Return the community json over HTTP.
pub async fn get_apub_community_http(
info: Path<CommunityQuery>,
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db: DbPoolParam,
) -> Result<HttpResponse<Body>, Error> {
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let community = Community::read_from_name(&&db.get()?, &info.community_name)?;
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let c = community.to_apub(&db.get().unwrap())?;
Ok(create_apub_response(&c))
}
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/// Returns an empty followers collection, only populating the siz (for privacy).
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// TODO this needs to return the actual followers, and the to: field needs this
pub async fn get_apub_community_followers(
info: Path<CommunityQuery>,
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db: DbPoolParam,
) -> Result<HttpResponse<Body>, Error> {
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let community = Community::read_from_name(&&db.get()?, &info.community_name)?;
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let conn = db.get()?;
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//As we are an object, we validated that the community id was valid
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let community_followers = CommunityFollowerView::for_community(&conn, community.id).unwrap();
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let mut collection = UnorderedCollection::default();
let oprops: &mut ObjectProperties = collection.as_mut();
oprops
.set_context_xsd_any_uri(context())?
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.set_id(community.actor_id)?;
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collection
.collection_props
.set_total_items(community_followers.len() as u64)?;
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Ok(create_apub_response(&collection))
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}
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// TODO should not be doing this
// Returns an UnorderedCollection with the latest posts from the community.
//pub async fn get_apub_community_outbox(
// info: Path<CommunityQuery>,
// db: DbPoolParam,
// chat_server: ChatServerParam,
//) -> Result<HttpResponse<Body>, Error> {
// let community = Community::read_from_name(&&db.get()?, &info.community_name)?;
// let conn = establish_unpooled_connection();
// //As we are an object, we validated that the community id was valid
// let community_posts: Vec<Post> = Post::list_for_community(&conn, community.id)?;
// let mut collection = OrderedCollection::default();
// let oprops: &mut ObjectProperties = collection.as_mut();
// oprops
// .set_context_xsd_any_uri(context())?
// .set_id(community.actor_id)?;
// collection
// .collection_props
// .set_many_items_base_boxes(
// community_posts
// .iter()
// .map(|c| c.as_page(&conn).unwrap())
// .collect(),
// )?
// .set_total_items(community_posts.len() as u64)?;
// Ok(create_apub_response(&collection))
//}