341 lines
11 KiB
Rust
341 lines
11 KiB
Rust
use self::following::send_follow_community;
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use crate::{
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activities::{
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block::{send_ban_from_community, send_ban_from_site},
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community::{
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collection_add::{send_add_mod_to_community, send_feature_post},
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lock_page::send_lock_post,
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update::send_update_community,
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},
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create_or_update::private_message::send_create_or_update_pm,
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deletion::{
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delete_user::delete_user,
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send_apub_delete_in_community,
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send_apub_delete_in_community_new,
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send_apub_delete_private_message,
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DeletableObjects,
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},
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voting::send_like_activity,
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},
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objects::{community::ApubCommunity, person::ApubPerson},
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protocol::activities::{
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community::report::Report,
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create_or_update::{note::CreateOrUpdateNote, page::CreateOrUpdatePage},
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CreateOrUpdateType,
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},
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CONTEXT,
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};
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use activitypub_federation::{
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config::Data,
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fetch::object_id::ObjectId,
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kinds::{activity::AnnounceType, public},
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protocol::context::WithContext,
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traits::{ActivityHandler, Actor},
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};
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use anyhow::anyhow;
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use lemmy_api_common::{
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context::LemmyContext,
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send_activity::{ActivityChannel, SendActivityData},
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};
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use lemmy_db_schema::source::{
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activity::{ActivitySendTargets, ActorType, SentActivity, SentActivityForm},
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community::Community,
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};
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use lemmy_db_views_actor::structs::{CommunityPersonBanView, CommunityView};
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use lemmy_utils::error::{LemmyError, LemmyErrorExt, LemmyErrorType, LemmyResult};
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use serde::Serialize;
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use std::ops::Deref;
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use tracing::info;
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use url::{ParseError, Url};
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use uuid::Uuid;
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pub mod block;
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pub mod community;
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pub mod create_or_update;
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pub mod deletion;
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pub mod following;
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pub mod voting;
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/// Checks that the specified Url actually identifies a Person (by fetching it), and that the person
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/// doesn't have a site ban.
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#[tracing::instrument(skip_all)]
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async fn verify_person(
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person_id: &ObjectId<ApubPerson>,
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context: &Data<LemmyContext>,
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) -> Result<(), LemmyError> {
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let person = person_id.dereference(context).await?;
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if person.banned {
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Err(anyhow!("Person {} is banned", person_id))
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.with_lemmy_type(LemmyErrorType::CouldntUpdateComment)
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} else {
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Ok(())
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}
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}
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/// Fetches the person and community to verify their type, then checks if person is banned from site
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/// or community.
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#[tracing::instrument(skip_all)]
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pub(crate) async fn verify_person_in_community(
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person_id: &ObjectId<ApubPerson>,
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community: &ApubCommunity,
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context: &Data<LemmyContext>,
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) -> Result<(), LemmyError> {
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let person = person_id.dereference(context).await?;
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if person.banned {
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Err(LemmyErrorType::PersonIsBannedFromSite(
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person.actor_id.to_string(),
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))?
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}
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let person_id = person.id;
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let community_id = community.id;
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let is_banned = CommunityPersonBanView::get(&mut context.pool(), person_id, community_id).await?;
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if is_banned {
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Err(LemmyErrorType::PersonIsBannedFromCommunity)?
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} else {
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Ok(())
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}
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}
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/// Verify that mod action in community was performed by a moderator.
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///
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/// * `mod_id` - Activitypub ID of the mod or admin who performed the action
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/// * `object_id` - Activitypub ID of the actor or object that is being moderated
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/// * `community` - The community inside which moderation is happening
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#[tracing::instrument(skip_all)]
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pub(crate) async fn verify_mod_action(
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mod_id: &ObjectId<ApubPerson>,
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community: &Community,
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context: &Data<LemmyContext>,
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) -> Result<(), LemmyError> {
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let mod_ = mod_id.dereference(context).await?;
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let is_mod_or_admin =
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CommunityView::is_mod_or_admin(&mut context.pool(), mod_.id, community.id).await?;
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if is_mod_or_admin {
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return Ok(());
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}
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// mod action comes from the same instance as the community, so it was presumably done
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// by an instance admin.
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// TODO: federate instance admin status and check it here
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if mod_id.inner().domain() == community.actor_id.domain() {
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return Ok(());
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}
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Err(LemmyErrorType::NotAModerator)?
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}
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pub(crate) fn verify_is_public(to: &[Url], cc: &[Url]) -> Result<(), LemmyError> {
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if ![to, cc].iter().any(|set| set.contains(&public())) {
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Err(LemmyErrorType::ObjectIsNotPublic)?
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} else {
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Ok(())
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}
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}
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pub(crate) fn verify_community_matches<T>(
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a: &ObjectId<ApubCommunity>,
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b: T,
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) -> Result<(), LemmyError>
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where
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T: Into<ObjectId<ApubCommunity>>,
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{
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let b: ObjectId<ApubCommunity> = b.into();
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if a != &b {
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Err(LemmyErrorType::InvalidCommunity)?
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} else {
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Ok(())
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}
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}
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pub(crate) fn check_community_deleted_or_removed(community: &Community) -> Result<(), LemmyError> {
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if community.deleted || community.removed {
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Err(LemmyErrorType::CannotCreatePostOrCommentInDeletedOrRemovedCommunity)?
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} else {
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Ok(())
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}
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}
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/// Generate a unique ID for an activity, in the format:
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/// `http(s)://example.com/receive/create/202daf0a-1489-45df-8d2e-c8a3173fed36`
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fn generate_activity_id<T>(kind: T, protocol_and_hostname: &str) -> Result<Url, ParseError>
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where
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T: ToString,
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{
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let id = format!(
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"{}/activities/{}/{}",
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protocol_and_hostname,
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kind.to_string().to_lowercase(),
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Uuid::new_v4()
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);
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Url::parse(&id)
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}
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/// like generate_activity_id but also add the inner kind for easier debugging
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fn generate_announce_activity_id(
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inner_kind: &str,
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protocol_and_hostname: &str,
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) -> Result<Url, ParseError> {
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let id = format!(
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"{}/activities/{}/{}/{}",
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protocol_and_hostname,
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AnnounceType::Announce.to_string().to_lowercase(),
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inner_kind.to_lowercase(),
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Uuid::new_v4()
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);
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Url::parse(&id)
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}
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pub(crate) trait GetActorType {
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fn actor_type(&self) -> ActorType;
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}
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#[tracing::instrument(skip_all)]
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async fn send_lemmy_activity<Activity, ActorT>(
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data: &Data<LemmyContext>,
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activity: Activity,
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actor: &ActorT,
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send_targets: ActivitySendTargets,
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sensitive: bool,
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) -> Result<(), LemmyError>
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where
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Activity: ActivityHandler + Serialize + Send + Sync + Clone,
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ActorT: Actor + GetActorType,
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Activity: ActivityHandler<Error = LemmyError>,
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{
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info!("Saving outgoing activity to queue {}", activity.id());
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let activity = WithContext::new(activity, CONTEXT.deref().clone());
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let form = SentActivityForm {
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ap_id: activity.id().clone().into(),
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data: serde_json::to_value(activity)?,
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sensitive,
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send_inboxes: send_targets
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.inboxes
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.into_iter()
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.map(|e| Some(e.into()))
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.collect(),
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send_all_instances: send_targets.all_instances,
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send_community_followers_of: send_targets.community_followers_of.map(|e| e.0),
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actor_type: actor.actor_type(),
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actor_apub_id: actor.id().into(),
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};
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SentActivity::create(&mut data.pool(), form).await?;
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Ok(())
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}
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pub async fn handle_outgoing_activities(context: Data<LemmyContext>) -> LemmyResult<()> {
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while let Some(data) = ActivityChannel::retrieve_activity().await {
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match_outgoing_activities(data, &context.reset_request_count()).await?
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}
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Ok(())
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}
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pub async fn match_outgoing_activities(
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data: SendActivityData,
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context: &Data<LemmyContext>,
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) -> LemmyResult<()> {
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let context = context.reset_request_count();
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let fed_task = async {
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use SendActivityData::*;
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match data {
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CreatePost(post) => {
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let creator_id = post.creator_id;
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CreateOrUpdatePage::send(post, creator_id, CreateOrUpdateType::Create, context).await
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}
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UpdatePost(post) => {
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let creator_id = post.creator_id;
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CreateOrUpdatePage::send(post, creator_id, CreateOrUpdateType::Update, context).await
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}
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DeletePost(post, person, data) => {
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send_apub_delete_in_community_new(
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person,
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post.community_id,
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DeletableObjects::Post(post.into()),
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None,
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data.deleted,
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context,
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)
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.await
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}
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RemovePost(post, person, data) => {
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send_apub_delete_in_community_new(
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person,
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post.community_id,
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DeletableObjects::Post(post.into()),
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data.reason.or_else(|| Some(String::new())),
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data.removed,
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context,
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)
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.await
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}
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LockPost(post, actor, locked) => send_lock_post(post, actor, locked, context).await,
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FeaturePost(post, actor, featured) => send_feature_post(post, actor, featured, context).await,
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CreateComment(comment) => {
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let creator_id = comment.creator_id;
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CreateOrUpdateNote::send(comment, creator_id, CreateOrUpdateType::Create, context).await
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}
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UpdateComment(comment) => {
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let creator_id = comment.creator_id;
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CreateOrUpdateNote::send(comment, creator_id, CreateOrUpdateType::Update, context).await
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}
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DeleteComment(comment, actor, community) => {
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let is_deleted = comment.deleted;
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let deletable = DeletableObjects::Comment(comment.into());
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send_apub_delete_in_community(actor, community, deletable, None, is_deleted, &context).await
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}
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RemoveComment(comment, actor, community, reason) => {
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let is_removed = comment.removed;
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let deletable = DeletableObjects::Comment(comment.into());
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send_apub_delete_in_community(actor, community, deletable, reason, is_removed, &context)
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.await
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}
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LikePostOrComment(object_id, person, community, score) => {
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send_like_activity(object_id, person, community, score, context).await
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}
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FollowCommunity(community, person, follow) => {
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send_follow_community(community, person, follow, &context).await
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}
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UpdateCommunity(actor, community) => send_update_community(community, actor, context).await,
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DeleteCommunity(actor, community, removed) => {
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let deletable = DeletableObjects::Community(community.clone().into());
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send_apub_delete_in_community(actor, community, deletable, None, removed, &context).await
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}
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RemoveCommunity(actor, community, reason, removed) => {
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let deletable = DeletableObjects::Community(community.clone().into());
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send_apub_delete_in_community(
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actor,
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community,
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deletable,
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reason.clone().or_else(|| Some(String::new())),
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removed,
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&context,
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)
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.await
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}
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AddModToCommunity(actor, community_id, updated_mod_id, added) => {
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send_add_mod_to_community(actor, community_id, updated_mod_id, added, context).await
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}
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BanFromCommunity(mod_, community_id, target, data) => {
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send_ban_from_community(mod_, community_id, target, data, context).await
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}
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BanFromSite(mod_, target, data) => send_ban_from_site(mod_, target, data, context).await,
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CreatePrivateMessage(pm) => {
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send_create_or_update_pm(pm, CreateOrUpdateType::Create, context).await
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}
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UpdatePrivateMessage(pm) => {
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send_create_or_update_pm(pm, CreateOrUpdateType::Update, context).await
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}
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DeletePrivateMessage(person, pm, deleted) => {
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send_apub_delete_private_message(&person.into(), pm, deleted, context).await
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}
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DeleteUser(person, delete_content) => delete_user(person, delete_content, context).await,
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CreateReport(url, actor, community, reason) => {
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Report::send(ObjectId::from(url), actor, community, reason, context).await
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}
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}
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};
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fed_task.await?;
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Ok(())
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}
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