lemmy/crates/apub_lib/src/traits.rs

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Rust
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use crate::{data::Data, signatures::PublicKey};
use activitystreams::chrono::NaiveDateTime;
use anyhow::Context;
pub use lemmy_apub_lib_derive::*;
use lemmy_utils::{location_info, LemmyError};
use url::Url;
#[async_trait::async_trait(?Send)]
pub trait ActivityHandler {
type DataType;
async fn verify(
&self,
data: &Data<Self::DataType>,
request_counter: &mut i32,
) -> Result<(), LemmyError>;
async fn receive(
self,
data: &Data<Self::DataType>,
request_counter: &mut i32,
) -> Result<(), LemmyError>;
}
#[async_trait::async_trait(?Send)]
pub trait ApubObject {
type DataType;
type ApubType;
type TombstoneType;
/// If this object should be refetched after a certain interval, it should return the last refresh
/// time here. This is mainly used to update remote actors.
fn last_refreshed_at(&self) -> Option<NaiveDateTime>;
/// Try to read the object with given ID from local database. Returns Ok(None) if it doesn't exist.
async fn read_from_apub_id(
object_id: Url,
data: &Self::DataType,
) -> Result<Option<Self>, LemmyError>
where
Self: Sized;
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/// Marks the object as deleted in local db. Called when a tombstone is received.
async fn delete(self, data: &Self::DataType) -> Result<(), LemmyError>;
/// Trait for converting an object or actor into the respective ActivityPub type.
async fn into_apub(self, data: &Self::DataType) -> Result<Self::ApubType, LemmyError>;
fn to_tombstone(&self) -> Result<Self::TombstoneType, LemmyError>;
/// Converts an object from ActivityPub type to Lemmy internal type.
///
/// * `apub` The object to read from
/// * `context` LemmyContext which holds DB pool, HTTP client etc
/// * `expected_domain` Domain where the object was received from. None in case of mod action.
/// * `mod_action_allowed` True if the object can be a mod activity, ignore `expected_domain` in this case
async fn from_apub(
apub: Self::ApubType,
data: &Self::DataType,
expected_domain: &Url,
request_counter: &mut i32,
) -> Result<Self, LemmyError>
where
Self: Sized;
}
/// Common methods provided by ActivityPub actors (community and person). Not all methods are
/// implemented by all actors.
pub trait ActorType {
fn actor_id(&self) -> Url;
// TODO: this should not be an option (needs db migration in lemmy)
fn public_key(&self) -> Option<String>;
fn private_key(&self) -> Option<String>;
fn inbox_url(&self) -> Url;
fn shared_inbox_url(&self) -> Option<Url>;
fn shared_inbox_or_inbox_url(&self) -> Url {
self.shared_inbox_url().unwrap_or_else(|| self.inbox_url())
}
fn get_public_key(&self) -> Result<PublicKey, LemmyError> {
Ok(PublicKey {
id: format!("{}#main-key", self.actor_id()),
owner: Box::new(self.actor_id()),
public_key_pem: self.public_key().context(location_info!())?,
})
}
}