fedimovies/src/activitypub/handlers/move.rs
2023-04-05 19:33:58 +00:00

135 lines
3.9 KiB
Rust

use serde::Deserialize;
use serde_json::Value;
use mitra_config::Config;
use mitra_models::{
database::DatabaseClient,
notifications::queries::create_move_notification,
profiles::helpers::find_verified_aliases,
relationships::queries::{
get_followers,
unfollow,
},
users::queries::{get_user_by_id, get_user_by_name},
};
use crate::activitypub::{
builders::{
follow::follow_or_create_request,
undo_follow::prepare_undo_follow,
},
fetcher::helpers::get_or_import_profile_by_actor_id,
identifiers::{parse_local_actor_id, profile_actor_id},
vocabulary::PERSON,
};
use crate::errors::ValidationError;
use crate::media::MediaStorage;
use super::HandlerResult;
#[derive(Deserialize)]
struct Move {
actor: String,
object: String,
target: String,
}
pub async fn handle_move(
config: &Config,
db_client: &mut impl DatabaseClient,
activity: Value,
) -> HandlerResult {
// Move(Person)
let activity: Move = serde_json::from_value(activity)
.map_err(|_| ValidationError("unexpected activity structure"))?;
// Mastodon: actor is old profile (object)
// Mitra: actor is new profile (target)
if activity.object != activity.actor && activity.target != activity.actor {
return Err(ValidationError("actor ID mismatch").into());
};
let instance = config.instance();
let storage = MediaStorage::from(config);
let old_profile = if let Ok(username) = parse_local_actor_id(
&instance.url(),
&activity.object,
) {
let old_user = get_user_by_name(db_client, &username).await?;
old_user.profile
} else {
get_or_import_profile_by_actor_id(
db_client,
&instance,
&storage,
&activity.object,
).await?
};
let old_actor_id = profile_actor_id(&instance.url(), &old_profile);
let new_profile = if let Ok(username) = parse_local_actor_id(
&instance.url(),
&activity.target,
) {
let new_user = get_user_by_name(db_client, &username).await?;
new_user.profile
} else {
get_or_import_profile_by_actor_id(
db_client,
&instance,
&storage,
&activity.target,
).await?
};
// Find aliases by DIDs (verified)
let mut aliases = find_verified_aliases(db_client, &new_profile).await?
.into_iter()
.map(|profile| profile_actor_id(&instance.url(), &profile))
.collect::<Vec<_>>();
// Add aliases reported by server (actor's alsoKnownAs property)
aliases.extend(new_profile.aliases.clone().into_actor_ids());
if !aliases.contains(&old_actor_id) {
return Err(ValidationError("target ID is not an alias").into());
};
let followers = get_followers(db_client, &old_profile.id).await?;
for follower in followers {
let follower = get_user_by_id(db_client, &follower.id).await?;
// Unfollow old profile
let maybe_follow_request_id = unfollow(
db_client,
&follower.id,
&old_profile.id,
).await?;
// Send Undo(Follow) if old actor is not local
if let Some(ref old_actor) = old_profile.actor_json {
let follow_request_id = maybe_follow_request_id
.expect("follow request must exist");
prepare_undo_follow(
&instance,
&follower,
old_actor,
&follow_request_id,
).enqueue(db_client).await?;
};
if follower.id == new_profile.id {
// Don't self-follow
continue;
};
// Follow new profile
follow_or_create_request(
db_client,
&instance,
&follower,
&new_profile,
).await?;
create_move_notification(
db_client,
&new_profile.id,
&follower.id,
).await?;
};
Ok(Some(PERSON))
}