activitypub-federation-rust/examples/local_federation/objects/person.rs

198 lines
5.8 KiB
Rust

use crate::{
activities::{accept::Accept, create_post::CreatePost, follow::Follow},
error::Error,
instance::DatabaseHandle,
objects::post::DbPost,
utils::generate_object_id,
};
use activitypub_federation::{
activity_sending::SendActivityTask,
config::Data,
fetch::{object_id::ObjectId, webfinger::webfinger_resolve_actor},
http_signatures::generate_actor_keypair,
kinds::actor::PersonType,
protocol::{context::WithContext, public_key::PublicKey, verification::verify_domains_match},
traits::{ActivityHandler, Actor, Object},
};
use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};
use std::fmt::Debug;
use url::Url;
#[derive(Debug, Clone)]
pub struct DbUser {
pub name: String,
pub ap_id: ObjectId<DbUser>,
pub inbox: Url,
// exists for all users (necessary to verify http signatures)
public_key: String,
// exists only for local users
private_key: Option<String>,
last_refreshed_at: DateTime<Utc>,
pub followers: Vec<Url>,
pub local: bool,
}
/// List of all activities which this actor can receive.
#[derive(Deserialize, Serialize, Debug)]
#[serde(untagged)]
#[enum_delegate::implement(ActivityHandler)]
pub enum PersonAcceptedActivities {
Follow(Follow),
Accept(Accept),
CreateNote(CreatePost),
}
impl DbUser {
pub fn new(hostname: &str, name: String) -> Result<DbUser, Error> {
let ap_id = Url::parse(&format!("http://{}/{}", hostname, &name))?.into();
let inbox = Url::parse(&format!("http://{}/{}/inbox", hostname, &name))?;
let keypair = generate_actor_keypair()?;
Ok(DbUser {
name,
ap_id,
inbox,
public_key: keypair.public_key,
private_key: Some(keypair.private_key),
last_refreshed_at: Utc::now(),
followers: vec![],
local: true,
})
}
}
#[derive(Clone, Debug, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct Person {
#[serde(rename = "type")]
kind: PersonType,
preferred_username: String,
id: ObjectId<DbUser>,
inbox: Url,
public_key: PublicKey,
}
impl DbUser {
pub fn followers(&self) -> &Vec<Url> {
&self.followers
}
pub fn followers_url(&self) -> Result<Url, Error> {
Ok(Url::parse(&format!("{}/followers", self.ap_id.inner()))?)
}
pub async fn follow(&self, other: &str, data: &Data<DatabaseHandle>) -> Result<(), Error> {
let other: DbUser = webfinger_resolve_actor(other, data).await?;
let id = generate_object_id(data.domain())?;
let follow = Follow::new(self.ap_id.clone(), other.ap_id.clone(), id.clone());
self.send(follow, vec![other.shared_inbox_or_inbox()], data)
.await?;
Ok(())
}
pub async fn post(&self, post: DbPost, data: &Data<DatabaseHandle>) -> Result<(), Error> {
let id = generate_object_id(data.domain())?;
let create = CreatePost::new(post.into_json(data).await?, id.clone());
let mut inboxes = vec![];
for f in self.followers.clone() {
let user: DbUser = ObjectId::from(f).dereference(data).await?;
inboxes.push(user.shared_inbox_or_inbox());
}
self.send(create, inboxes, data).await?;
Ok(())
}
pub(crate) async fn send<Activity>(
&self,
activity: Activity,
recipients: Vec<Url>,
data: &Data<DatabaseHandle>,
) -> Result<(), Error>
where
Activity: ActivityHandler + Serialize + Debug + Send + Sync,
<Activity as ActivityHandler>::Error: From<anyhow::Error> + From<serde_json::Error>,
{
let activity = WithContext::new_default(activity);
let sends = SendActivityTask::prepare(&activity, self, recipients, data).await?;
for send in sends {
send.sign_and_send(data).await?;
}
Ok(())
}
}
#[async_trait::async_trait]
impl Object for DbUser {
type DataType = DatabaseHandle;
type Kind = Person;
type Error = Error;
fn last_refreshed_at(&self) -> Option<DateTime<Utc>> {
Some(self.last_refreshed_at)
}
async fn read_from_id(
object_id: Url,
data: &Data<Self::DataType>,
) -> Result<Option<Self>, Self::Error> {
let users = data.users.lock().unwrap();
let res = users
.clone()
.into_iter()
.find(|u| u.ap_id.inner() == &object_id);
Ok(res)
}
async fn into_json(self, _data: &Data<Self::DataType>) -> Result<Self::Kind, Self::Error> {
Ok(Person {
preferred_username: self.name.clone(),
kind: Default::default(),
id: self.ap_id.clone(),
inbox: self.inbox.clone(),
public_key: self.public_key(),
})
}
async fn verify(
json: &Self::Kind,
expected_domain: &Url,
_data: &Data<Self::DataType>,
) -> Result<(), Self::Error> {
verify_domains_match(json.id.inner(), expected_domain)?;
Ok(())
}
async fn from_json(json: Self::Kind, data: &Data<Self::DataType>) -> Result<Self, Self::Error> {
let user = DbUser {
name: json.preferred_username,
ap_id: json.id,
inbox: json.inbox,
public_key: json.public_key.public_key_pem,
private_key: None,
last_refreshed_at: Utc::now(),
followers: vec![],
local: false,
};
let mut mutex = data.users.lock().unwrap();
mutex.push(user.clone());
Ok(user)
}
}
impl Actor for DbUser {
fn id(&self) -> Url {
self.ap_id.inner().clone()
}
fn public_key_pem(&self) -> &str {
&self.public_key
}
fn private_key_pem(&self) -> Option<String> {
self.private_key.clone()
}
fn inbox(&self) -> Url {
self.inbox.clone()
}
}