use crate::{ check_is_apub_id_valid, context::lemmy_context, fetcher::community::{fetch_community_outbox, update_community_mods}, generate_moderators_url, generate_outbox_url, objects::{create_tombstone, FromApub, ImageObject, Source, ToApub}, CommunityType, }; use activitystreams::{ actor::{kind::GroupType, Endpoints}, base::AnyBase, object::{kind::ImageType, Tombstone}, primitives::OneOrMany, unparsed::Unparsed, }; use chrono::{DateTime, FixedOffset}; use itertools::Itertools; use lemmy_api_common::blocking; use lemmy_apub_lib::{ signatures::PublicKey, traits::ActorType, values::{MediaTypeHtml, MediaTypeMarkdown}, verify::verify_domains_match, }; use lemmy_db_schema::{ naive_now, source::community::{Community, CommunityForm}, DbPool, }; use lemmy_db_views_actor::community_follower_view::CommunityFollowerView; use lemmy_utils::{ settings::structs::Settings, utils::{check_slurs, check_slurs_opt, convert_datetime, markdown_to_html}, LemmyError, }; use lemmy_websocket::LemmyContext; use serde::{Deserialize, Serialize}; use serde_with::skip_serializing_none; use url::Url; #[skip_serializing_none] #[derive(Clone, Debug, Deserialize, Serialize)] #[serde(rename_all = "camelCase")] pub struct Group { #[serde(rename = "@context")] context: OneOrMany, #[serde(rename = "type")] kind: GroupType, id: Url, /// username, set at account creation and can never be changed preferred_username: String, /// title (can be changed at any time) name: String, content: Option, media_type: Option, source: Option, icon: Option, /// banner image: Option, // lemmy extension sensitive: Option, // lemmy extension pub(crate) moderators: Option, inbox: Url, pub(crate) outbox: Url, followers: Url, endpoints: Endpoints, public_key: PublicKey, published: DateTime, updated: Option>, #[serde(flatten)] unparsed: Unparsed, } impl Group { pub(crate) fn id(&self, expected_domain: &Url) -> Result<&Url, LemmyError> { verify_domains_match(&self.id, expected_domain)?; Ok(&self.id) } pub(crate) async fn from_apub_to_form( group: &Group, expected_domain: &Url, settings: &Settings, ) -> Result { let actor_id = Some(group.id(expected_domain)?.clone().into()); let name = group.preferred_username.clone(); let title = group.name.clone(); let description = group.source.clone().map(|s| s.content); let shared_inbox = group.endpoints.shared_inbox.clone().map(|s| s.into()); let slur_regex = &settings.slur_regex(); check_slurs(&name, slur_regex)?; check_slurs(&title, slur_regex)?; check_slurs_opt(&description, slur_regex)?; Ok(CommunityForm { name, title, description, removed: None, published: Some(group.published.naive_local()), updated: group.updated.map(|u| u.naive_local()), deleted: None, nsfw: Some(group.sensitive.unwrap_or(false)), actor_id, local: Some(false), private_key: None, public_key: Some(group.public_key.public_key_pem.clone()), last_refreshed_at: Some(naive_now()), icon: Some(group.icon.clone().map(|i| i.url.into())), banner: Some(group.image.clone().map(|i| i.url.into())), followers_url: Some(group.followers.clone().into()), inbox_url: Some(group.inbox.clone().into()), shared_inbox_url: Some(shared_inbox), }) } } #[async_trait::async_trait(?Send)] impl ToApub for Community { type ApubType = Group; async fn to_apub(&self, _pool: &DbPool) -> Result { let source = self.description.clone().map(|bio| Source { content: bio, media_type: MediaTypeMarkdown::Markdown, }); let icon = self.icon.clone().map(|url| ImageObject { kind: ImageType::Image, url: url.into(), }); let image = self.banner.clone().map(|url| ImageObject { kind: ImageType::Image, url: url.into(), }); let group = Group { context: lemmy_context(), kind: GroupType::Group, id: self.actor_id(), preferred_username: self.name.clone(), name: self.title.clone(), content: self.description.as_ref().map(|b| markdown_to_html(b)), media_type: self.description.as_ref().map(|_| MediaTypeHtml::Html), source, icon, image, sensitive: Some(self.nsfw), moderators: Some(generate_moderators_url(&self.actor_id)?.into()), inbox: self.inbox_url.clone().into(), outbox: generate_outbox_url(&self.actor_id)?.into(), followers: self.followers_url.clone().into(), endpoints: Endpoints { shared_inbox: self.shared_inbox_url.clone().map(|s| s.into()), ..Default::default() }, public_key: self.get_public_key()?, published: convert_datetime(self.published), updated: self.updated.map(convert_datetime), unparsed: Default::default(), }; Ok(group) } fn to_tombstone(&self) -> Result { create_tombstone( self.deleted, self.actor_id.to_owned().into(), self.updated, GroupType::Group, ) } } #[async_trait::async_trait(?Send)] impl FromApub for Community { type ApubType = Group; /// Converts a `Group` to `Community`, inserts it into the database and updates moderators. async fn from_apub( group: &Group, context: &LemmyContext, expected_domain: &Url, request_counter: &mut i32, ) -> Result { let form = Group::from_apub_to_form(group, expected_domain, &context.settings()).await?; let community = blocking(context.pool(), move |conn| Community::upsert(conn, &form)).await??; update_community_mods(group, &community, context, request_counter).await?; // TODO: doing this unconditionally might cause infinite loop for some reason fetch_community_outbox(context, &group.outbox, request_counter).await?; Ok(community) } } #[async_trait::async_trait(?Send)] impl CommunityType for Community { fn followers_url(&self) -> Url { self.followers_url.clone().into() } /// For a given community, returns the inboxes of all followers. async fn get_follower_inboxes( &self, pool: &DbPool, settings: &Settings, ) -> Result, LemmyError> { let id = self.id; let follows = blocking(pool, move |conn| { CommunityFollowerView::for_community(conn, id) }) .await??; let inboxes = follows .into_iter() .filter(|f| !f.follower.local) .map(|f| f.follower.shared_inbox_url.unwrap_or(f.follower.inbox_url)) .map(|i| i.into_inner()) .unique() // Don't send to blocked instances .filter(|inbox| check_is_apub_id_valid(inbox, false, settings).is_ok()) .collect(); Ok(inboxes) } }