lemmy/server/src/apub/user.rs

use super::*;

#[derive(Deserialize)]
pub struct UserQuery {
  user_name: String,
}

impl ToApub for User_ {
  type Response = PersonExt;

  // Turn a Lemmy Community into an ActivityPub group that can be sent out over the network.
  fn to_apub(&self, _conn: &PgConnection) -> Result<PersonExt, Error> {
    // TODO go through all these to_string and to_owned()
    let mut person = Person::default();
    let oprops: &mut ObjectProperties = person.as_mut();
    oprops
      .set_context_xsd_any_uri(context())?
      .set_id(self.actor_id.to_string())?
      .set_name_xsd_string(self.name.to_owned())?
      .set_published(convert_datetime(self.published))?;

    if let Some(u) = self.updated {
      oprops.set_updated(convert_datetime(u))?;
    }

    if let Some(i) = &self.preferred_username {
      oprops.set_name_xsd_string(i.to_owned())?;
    }

    let mut endpoint_props = EndpointProperties::default();

    endpoint_props.set_shared_inbox(self.get_shared_inbox_url())?;

    let mut actor_props = ApActorProperties::default();

    actor_props
      .set_inbox(self.get_inbox_url())?
      .set_outbox(self.get_outbox_url())?
      .set_endpoints(endpoint_props)?
      .set_followers(self.get_followers_url())?
      .set_following(self.get_following_url())?
      .set_liked(self.get_liked_url())?;

    Ok(person.extend(actor_props).extend(self.get_public_key_ext()))
  }
}

impl ActorType for User_ {
  fn actor_id(&self) -> String {
    self.actor_id.to_owned()
  }

  fn public_key(&self) -> String {
    self.public_key.to_owned().unwrap()
  }

  /// As a given local user, send out a follow request to a remote community.
  fn send_follow(&self, follow_actor_id: &str, conn: &PgConnection) -> Result<(), Error> {
    let mut follow = Follow::new();

    let id = format!("{}/follow/{}", self.actor_id, uuid::Uuid::new_v4());

    follow
      .object_props
      .set_context_xsd_any_uri(context())?
      .set_id(id)?;
    follow
      .follow_props
      .set_actor_xsd_any_uri(self.actor_id.to_owned())?
      .set_object_xsd_any_uri(follow_actor_id)?;
    let to = format!("{}/inbox", follow_actor_id);

    // Insert the sent activity into the activity table
    let activity_form = activity::ActivityForm {
      user_id: self.id,
      data: serde_json::to_value(&follow)?,
      local: true,
      updated: None,
    };
    activity::Activity::create(&conn, &activity_form)?;

    send_activity(
      &follow,
      &self.private_key.as_ref().unwrap(),
      &follow_actor_id,
      vec![to],
    )?;
    Ok(())
  }

  fn send_delete(&self, _conn: &PgConnection) -> Result<(), Error> {
    unimplemented!()
  }
}

impl FromApub for UserForm {
  type ApubType = PersonExt;
  /// Parse an ActivityPub person received from another instance into a Lemmy user.
  fn from_apub(person: &PersonExt, _conn: &PgConnection) -> Result<Self, Error> {
    let oprops = &person.base.base.object_props;
    let aprops = &person.base.extension;
    let public_key: &PublicKey = &person.extension.public_key;

    Ok(UserForm {
      name: oprops.get_name_xsd_string().unwrap().to_string(),
      preferred_username: aprops.get_preferred_username().map(|u| u.to_string()),
      password_encrypted: "".to_string(),
      admin: false,
      banned: false,
      email: None,
      avatar: None, // -> icon, image
      updated: oprops
        .get_updated()
        .map(|u| u.as_ref().to_owned().naive_local()),
      show_nsfw: false,
      theme: "".to_string(),
      default_sort_type: 0,
      default_listing_type: 0,
      lang: "".to_string(),
      show_avatars: false,
      send_notifications_to_email: false,
      matrix_user_id: None,
      actor_id: oprops.get_id().unwrap().to_string(),
      bio: oprops.get_summary_xsd_string().map(|s| s.to_string()),
      local: false,
      private_key: None,
      public_key: Some(public_key.to_owned().public_key_pem),
      last_refreshed_at: Some(naive_now()),
    })
  }
}

/// Return the user json over HTTP.
pub async fn get_apub_user_http(
  info: Path<UserQuery>,
  db: DbPoolParam,
) -> Result<HttpResponse<Body>, Error> {
  let user = User_::find_by_email_or_username(&&db.get()?, &info.user_name)?;
  let u = user.to_apub(&db.get().unwrap())?;
  Ok(create_apub_response(&u))
}