From 8c6e259133c00261245fde14cca5301bdf596fa7 Mon Sep 17 00:00:00 2001
From: Gabriel Kaszewski <gabrielkaszewski@gmail.com>
Date: Fri, 15 May 2026 04:08:40 +0200
Subject: [PATCH] feat(application): federation management use cases

---
 .../src/use_cases/federation_management.rs    | 106 ++++++++++++++++++
 crates/application/src/use_cases/mod.rs       |   1 +
 2 files changed, 107 insertions(+)
 create mode 100644 crates/application/src/use_cases/federation_management.rs

diff --git a/crates/application/src/use_cases/federation_management.rs b/crates/application/src/use_cases/federation_management.rs
new file mode 100644
index 0000000..300c742
--- /dev/null
+++ b/crates/application/src/use_cases/federation_management.rs
@@ -0,0 +1,106 @@
+use domain::{
+    errors::DomainError, models::remote_actor::RemoteActor, ports::FederationActionPort,
+    value_objects::UserId,
+};
+
+pub async fn list_pending_requests(
+    federation: &dyn FederationActionPort,
+    user_id: &UserId,
+) -> Result<Vec<RemoteActor>, DomainError> {
+    federation.get_pending_followers(user_id).await
+}
+
+pub async fn accept_follow_request(
+    federation: &dyn FederationActionPort,
+    user_id: &UserId,
+    actor_url: &str,
+) -> Result<(), DomainError> {
+    federation.accept_follow_request(user_id, actor_url).await
+}
+
+pub async fn reject_follow_request(
+    federation: &dyn FederationActionPort,
+    user_id: &UserId,
+    actor_url: &str,
+) -> Result<(), DomainError> {
+    federation.reject_follow_request(user_id, actor_url).await
+}
+
+pub async fn list_remote_followers(
+    federation: &dyn FederationActionPort,
+    user_id: &UserId,
+) -> Result<Vec<RemoteActor>, DomainError> {
+    federation.get_remote_followers(user_id).await
+}
+
+pub async fn remove_remote_follower(
+    federation: &dyn FederationActionPort,
+    user_id: &UserId,
+    actor_url: &str,
+) -> Result<(), DomainError> {
+    federation.remove_remote_follower(user_id, actor_url).await
+}
+
+pub async fn list_remote_following(
+    federation: &dyn FederationActionPort,
+    user_id: &UserId,
+) -> Result<Vec<RemoteActor>, DomainError> {
+    federation.get_remote_following(user_id).await
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use domain::testing::TestStore;
+
+    #[tokio::test]
+    async fn list_pending_returns_empty_by_default() {
+        let store = TestStore::default();
+        let uid = UserId::new();
+        let result = list_pending_requests(&store, &uid).await.unwrap();
+        assert!(result.is_empty());
+    }
+
+    #[tokio::test]
+    async fn accept_follow_request_returns_ok() {
+        let store = TestStore::default();
+        let uid = UserId::new();
+        accept_follow_request(&store, &uid, "https://mastodon.social/users/alice")
+            .await
+            .unwrap();
+    }
+
+    #[tokio::test]
+    async fn reject_follow_request_returns_ok() {
+        let store = TestStore::default();
+        let uid = UserId::new();
+        reject_follow_request(&store, &uid, "https://mastodon.social/users/alice")
+            .await
+            .unwrap();
+    }
+
+    #[tokio::test]
+    async fn list_remote_followers_returns_empty_by_default() {
+        let store = TestStore::default();
+        let uid = UserId::new();
+        let result = list_remote_followers(&store, &uid).await.unwrap();
+        assert!(result.is_empty());
+    }
+
+    #[tokio::test]
+    async fn remove_remote_follower_returns_ok() {
+        let store = TestStore::default();
+        let uid = UserId::new();
+        remove_remote_follower(&store, &uid, "https://mastodon.social/users/alice")
+            .await
+            .unwrap();
+    }
+
+    #[tokio::test]
+    async fn list_remote_following_returns_empty_by_default() {
+        let store = TestStore::default();
+        let uid = UserId::new();
+        let result = list_remote_following(&store, &uid).await.unwrap();
+        assert!(result.is_empty());
+    }
+}
diff --git a/crates/application/src/use_cases/mod.rs b/crates/application/src/use_cases/mod.rs
index ad33883..c8c4862 100644
--- a/crates/application/src/use_cases/mod.rs
+++ b/crates/application/src/use_cases/mod.rs
@@ -1,5 +1,6 @@
 pub mod api_keys;
 pub mod auth;
+pub mod federation_management;
 pub mod feed;
 pub mod notifications;
 pub mod profile;