447 lines
16 KiB
Rust
447 lines
16 KiB
Rust
use std::sync::Arc;
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use activitypub_federation::{
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activity_sending::SendActivityTask,
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config::Data,
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fetch::{object_id::ObjectId, webfinger::webfinger_resolve_actor},
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protocol::context::WithContext,
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traits::Actor,
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};
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use axum::{routing::get, routing::post, Router};
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use domain::{ports::UserRepository, value_objects::UserId};
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use url::Url;
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use crate::{
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activities::{AcceptActivity, CreateActivity, FollowActivity, RejectActivity, UndoActivity},
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actor_handler::actor_handler,
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actors::{get_local_actor, DbActor},
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data::FederationData,
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event_handler::ActivityPubEventHandler,
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federation::ApFederationConfig,
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followers_handler::{followers_handler, following_handler},
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inbox::inbox_handler,
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outbox::outbox_handler,
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repository::{FederationRepository, FollowerStatus, RemoteActor},
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webfinger::webfinger_handler,
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};
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pub(crate) async fn send_with_retry(
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sends: Vec<SendActivityTask>,
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data: &Data<FederationData>,
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) -> Vec<anyhow::Error> {
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let mut failures = vec![];
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for send in sends {
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let mut delay = std::time::Duration::from_secs(1);
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for attempt in 1..=3u32 {
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match send.clone().sign_and_send(data).await {
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Ok(()) => {
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break;
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}
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Err(e) if attempt < 3 => {
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tracing::warn!(attempt, error = %e, "delivery failed, retrying");
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tokio::time::sleep(delay).await;
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delay *= 2;
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}
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Err(e) => {
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tracing::error!(attempt, error = %e, "delivery failed permanently");
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failures.push(anyhow::anyhow!(e));
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}
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}
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}
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}
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failures
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}
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pub struct ActivityPubService {
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federation_config: ApFederationConfig,
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base_url: String,
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}
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impl ActivityPubService {
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pub async fn new(
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repo: Arc<dyn FederationRepository>,
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user_repo: Arc<dyn UserRepository>,
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movie_repo: Arc<dyn domain::ports::MovieRepository>,
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base_url: String,
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debug: bool,
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) -> anyhow::Result<Self> {
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let data = FederationData::new(repo, user_repo, movie_repo, base_url.clone());
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let federation_config = ApFederationConfig::new(data, debug).await?;
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Ok(Self {
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federation_config,
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base_url,
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})
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}
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pub fn federation_config(&self) -> &ApFederationConfig {
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&self.federation_config
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}
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pub fn request_data(&self) -> Data<FederationData> {
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self.federation_config.to_request_data()
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}
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// Returns the AP actor document JSON for a local user.
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// Used for content negotiation in the HTML profile handler.
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pub async fn actor_json(&self, user_id_str: &str) -> anyhow::Result<String> {
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use activitypub_federation::traits::Object;
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use crate::actors::get_local_actor;
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let uuid = uuid::Uuid::parse_str(user_id_str)?;
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let user_id = UserId::from_uuid(uuid);
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let data = self.federation_config.to_request_data();
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let actor = get_local_actor(user_id, &data).await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let person = actor.into_json(&data).await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let with_context = WithContext::new_default(person);
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Ok(serde_json::to_string(&with_context)?)
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}
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pub fn router(&self) -> Router {
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Router::new()
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.route("/.well-known/webfinger", get(webfinger_handler))
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.route("/users/{user_id}", get(actor_handler))
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.route("/users/{user_id}/inbox", post(inbox_handler))
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.route("/users/{user_id}/outbox", get(outbox_handler))
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.route("/users/{user_id}/followers", get(followers_handler))
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.route("/users/{user_id}/following", get(following_handler))
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.layer(self.federation_config.middleware())
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}
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pub fn event_handler(&self) -> ActivityPubEventHandler {
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ActivityPubEventHandler::new(self.federation_config.clone(), self.base_url.clone())
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}
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pub async fn follow(&self, local_user_id: UserId, handle: &str) -> anyhow::Result<()> {
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let data = self.federation_config.to_request_data();
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let remote_actor: DbActor = webfinger_resolve_actor(handle, &data)
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.await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let local_actor = get_local_actor(local_user_id.clone(), &data)
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.await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let follow_id = crate::urls::activity_url(&self.base_url).map_err(|e| anyhow::anyhow!("{e}"))?;
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let follow_id_str = follow_id.to_string();
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let follow = FollowActivity {
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id: follow_id,
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kind: Default::default(),
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actor: ObjectId::from(local_actor.ap_id.clone()),
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object: ObjectId::from(remote_actor.ap_id.clone()),
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};
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let follow_with_ctx = WithContext::new_default(follow);
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let sends = SendActivityTask::prepare(
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&follow_with_ctx,
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&local_actor,
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vec![remote_actor.inbox()],
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&data,
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)
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.await?;
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let failures = send_with_retry(sends, &data).await;
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if !failures.is_empty() {
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tracing::warn!(count = failures.len(), "some activity deliveries failed permanently");
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}
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let remote = RemoteActor {
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url: remote_actor.ap_id.to_string(),
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handle: remote_actor.username.clone(),
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inbox_url: remote_actor.inbox_url.to_string(),
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shared_inbox_url: None,
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display_name: Some(remote_actor.username.clone()),
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};
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data.federation_repo
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.add_following(local_user_id, remote, &follow_id_str)
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.await?;
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Ok(())
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}
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pub async fn unfollow(&self, local_user_id: UserId, actor_url_str: &str) -> anyhow::Result<()> {
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let data = self.federation_config.to_request_data();
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let remote = data
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.federation_repo
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.get_remote_actor(actor_url_str)
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.await?
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.ok_or_else(|| anyhow::anyhow!("remote actor not found: {}", actor_url_str))?;
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let local_actor = get_local_actor(local_user_id.clone(), &data)
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.await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let remote_ap_id = Url::parse(actor_url_str)?;
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let inbox = Url::parse(&remote.inbox_url)?;
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let follow_activity_id_str = data
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.federation_repo
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.get_follow_activity_id(local_user_id.clone(), actor_url_str)
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.await?;
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let follow_id = match follow_activity_id_str {
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Some(id) => Url::parse(&id)?,
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None => crate::urls::activity_url(&self.base_url).map_err(|e| anyhow::anyhow!("{e}"))?,
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};
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let follow = FollowActivity {
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id: follow_id,
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kind: Default::default(),
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actor: ObjectId::from(local_actor.ap_id.clone()),
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object: ObjectId::from(remote_ap_id),
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};
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let undo_id = crate::urls::activity_url(&self.base_url).map_err(|e| anyhow::anyhow!("{e}"))?;
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let undo = UndoActivity {
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id: undo_id,
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kind: Default::default(),
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actor: ObjectId::from(local_actor.ap_id.clone()),
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object: follow,
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};
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let undo_with_ctx = WithContext::new_default(undo);
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let sends =
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SendActivityTask::prepare(&undo_with_ctx, &local_actor, vec![inbox], &data).await?;
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let failures = send_with_retry(sends, &data).await;
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if !failures.is_empty() {
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tracing::warn!(count = failures.len(), "some activity deliveries failed permanently");
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}
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data.federation_repo
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.remove_following(local_user_id, actor_url_str)
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.await?;
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data.federation_repo
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.delete_remote_reviews_by_actor(actor_url_str)
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.await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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Ok(())
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}
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pub async fn get_following(&self, local_user_id: UserId) -> anyhow::Result<Vec<RemoteActor>> {
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let data = self.federation_config.to_request_data();
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data.federation_repo.get_following(local_user_id).await
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}
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pub async fn count_following(&self, local_user_id: UserId) -> anyhow::Result<usize> {
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let data = self.federation_config.to_request_data();
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data.federation_repo.count_following(local_user_id).await
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}
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pub async fn accept_follower(
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&self,
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local_user_id: UserId,
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remote_actor_url: &str,
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) -> anyhow::Result<()> {
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let data = self.federation_config.to_request_data();
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let local_actor = get_local_actor(local_user_id.clone(), &data)
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.await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let remote_actor = data
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.federation_repo
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.get_remote_actor(remote_actor_url)
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.await?
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.ok_or_else(|| anyhow::anyhow!("remote actor not found"))?;
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let follow_id = crate::urls::activity_url(&self.base_url).map_err(|e| anyhow::anyhow!("{e}"))?;
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let follow = FollowActivity {
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id: follow_id,
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kind: Default::default(),
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actor: ObjectId::from(Url::parse(remote_actor_url)?),
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object: ObjectId::from(local_actor.ap_id.clone()),
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};
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let accept = AcceptActivity {
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id: crate::urls::activity_url(&self.base_url).map_err(|e| anyhow::anyhow!("{e}"))?,
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kind: Default::default(),
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actor: ObjectId::from(local_actor.ap_id.clone()),
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object: follow,
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};
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// Update status first so local state is correct even if delivery fails
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data.federation_repo
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.update_follower_status(local_user_id.clone(), remote_actor_url, FollowerStatus::Accepted)
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.await?;
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let inbox = Url::parse(&remote_actor.inbox_url)?;
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let sends = SendActivityTask::prepare(
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&WithContext::new_default(accept),
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&local_actor,
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vec![inbox.clone()],
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&data,
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)
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.await?;
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let failures = send_with_retry(sends, &data).await;
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if !failures.is_empty() {
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tracing::warn!("failed to deliver Accept activity, but follower is marked accepted locally");
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}
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self.spawn_backfill(local_user_id, remote_actor.inbox_url.clone());
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Ok(())
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}
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pub async fn reject_follower(
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&self,
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local_user_id: UserId,
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remote_actor_url: &str,
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) -> anyhow::Result<()> {
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let data = self.federation_config.to_request_data();
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let local_actor = get_local_actor(local_user_id.clone(), &data)
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.await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let remote_actor = data
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.federation_repo
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.get_remote_actor(remote_actor_url)
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.await?
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.ok_or_else(|| anyhow::anyhow!("remote actor not found"))?;
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let follow_id = crate::urls::activity_url(&self.base_url).map_err(|e| anyhow::anyhow!("{e}"))?;
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let follow = FollowActivity {
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id: follow_id,
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kind: Default::default(),
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actor: ObjectId::from(Url::parse(remote_actor_url)?),
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object: ObjectId::from(local_actor.ap_id.clone()),
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};
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let reject = RejectActivity {
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id: crate::urls::activity_url(&self.base_url).map_err(|e| anyhow::anyhow!("{e}"))?,
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kind: Default::default(),
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actor: ObjectId::from(local_actor.ap_id.clone()),
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object: follow,
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};
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let inbox = Url::parse(&remote_actor.inbox_url)?;
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let sends = SendActivityTask::prepare(
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&WithContext::new_default(reject),
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&local_actor,
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vec![inbox],
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&data,
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)
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.await?;
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let failures = send_with_retry(sends, &data).await;
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if !failures.is_empty() {
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tracing::warn!(count = failures.len(), "some activity deliveries failed permanently");
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}
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data.federation_repo
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.remove_follower(local_user_id, remote_actor_url)
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.await?;
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Ok(())
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}
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pub async fn get_pending_followers(
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&self,
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local_user_id: UserId,
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) -> anyhow::Result<Vec<RemoteActor>> {
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let data = self.federation_config.to_request_data();
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data.federation_repo
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.get_pending_followers(local_user_id)
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.await
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}
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fn spawn_backfill(&self, owner_user_id: UserId, follower_inbox_url: String) {
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let config = self.federation_config.clone();
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let base_url = self.base_url.clone();
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tokio::spawn(async move {
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if let Err(e) = ActivityPubService::run_backfill(
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config, base_url, owner_user_id, follower_inbox_url,
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).await {
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tracing::warn!(error = %e, "backfill: task failed");
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}
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});
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}
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async fn run_backfill(
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config: ApFederationConfig,
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base_url: String,
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owner_user_id: UserId,
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follower_inbox_url: String,
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) -> anyhow::Result<()> {
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const BATCH_SIZE: usize = 20;
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let data = config.to_request_data();
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let local_actor = get_local_actor(owner_user_id.clone(), &data)
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.await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let inbox = Url::parse(&follower_inbox_url)?;
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let history = data.movie_repo.get_user_history(&owner_user_id).await?;
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let local_reviews: Vec<_> = history
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.into_iter()
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.filter(|e| matches!(e.review().source(), domain::models::ReviewSource::Local))
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.collect();
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let total = local_reviews.len();
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let mut success_count = 0usize;
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let mut failure_count = 0usize;
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for chunk in local_reviews.chunks(BATCH_SIZE) {
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for entry in chunk {
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match ActivityPubService::deliver_review_to_inbox(
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entry.review().clone(),
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&local_actor,
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inbox.clone(),
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&data,
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&base_url,
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)
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.await
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{
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Ok(_) => success_count += 1,
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Err(_) => failure_count += 1,
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}
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}
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tokio::time::sleep(std::time::Duration::from_millis(100)).await;
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}
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tracing::info!(
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user_id = %owner_user_id.value(),
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follower = %follower_inbox_url,
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sent = success_count,
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failed = failure_count,
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total = total,
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"backfill complete"
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);
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Ok(())
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}
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async fn deliver_review_to_inbox(
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review: domain::models::Review,
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local_actor: &DbActor,
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inbox: Url,
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data: &Data<FederationData>,
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base_url: &str,
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) -> anyhow::Result<()> {
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use activitypub_federation::traits::Object;
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use crate::objects::DbReview;
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let ap_id = crate::urls::review_url(base_url, review.id());
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let db_review = DbReview { review, ap_id };
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let object = db_review.into_json(data).await
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.map_err(|e| anyhow::anyhow!("{e}"))?;
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let activity_id = crate::urls::activity_url(base_url).map_err(|e| anyhow::anyhow!("{e}"))?;
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let create = CreateActivity {
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id: activity_id,
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kind: Default::default(),
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actor: ObjectId::from(local_actor.ap_id.clone()),
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object,
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};
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let sends = SendActivityTask::prepare(
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&WithContext::new_default(create),
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local_actor,
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vec![inbox],
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data,
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).await?;
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let failures = send_with_retry(sends, data).await;
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if let Some(e) = failures.into_iter().next() {
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return Err(e);
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}
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Ok(())
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}
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}
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