feat: UserUnblocked + UserRegistered events, fix unblock_user and register signatures

crates/application/src/use_cases/auth.rs

@@ -1,5 +1,6 @@
 use domain::{
     errors::DomainError,
+    events::DomainEvent,
     models::user::User,
     ports::{AuthService, EventPublisher, PasswordHasher, UserRepository},
     value_objects::{Email, UserId, Username},
@@ -13,7 +14,7 @@ pub async fn register(
     users: &dyn UserRepository,
     hasher: &dyn PasswordHasher,
     auth: &dyn AuthService,
-    _events: &dyn EventPublisher,
+    events: &dyn EventPublisher,
     input: RegisterInput,
 ) -> Result<RegisterOutput, DomainError> {
     let username = Username::new(input.username)?;
@@ -27,6 +28,7 @@ pub async fn register(
     let hash = hasher.hash(&input.password).await?;
     let user = User::new_local(UserId::new(), username, email, hash);
     users.save(&user).await?;
+    events.publish(&DomainEvent::UserRegistered { user_id: user.id.clone() }).await?;
     let token = auth.generate_token(&user.id)?;
     Ok(RegisterOutput { user, token: token.token })
 }
@@ -56,6 +58,7 @@ mod tests {
     use async_trait::async_trait;
     use domain::{
         errors::DomainError,
+        events::DomainEvent,
         ports::{AuthService, GeneratedToken, PasswordHasher},
         testing::{NoOpEventPublisher, TestStore},
         value_objects::{PasswordHash, UserId},
@@ -112,4 +115,13 @@ mod tests {
         let err = login(&store, &FakeHasher, &FakeAuth, LoginInput { email: "alice@ex.com".into(), password: "wrong".into() }).await.unwrap_err();
         assert!(matches!(err, DomainError::Unauthorized));
     }
+
+    #[tokio::test]
+    async fn register_publishes_user_registered_event() {
+        let store = TestStore::default();
+        register(&store, &FakeHasher, &FakeAuth, &store, input()).await.unwrap();
+        let events = store.events.lock().unwrap();
+        assert_eq!(events.len(), 1);
+        assert!(matches!(events[0], DomainEvent::UserRegistered { .. }));
+    }
 }

crates/application/src/use_cases/social.rs

@@ -67,8 +67,17 @@ pub async fn block_user(blocks: &dyn BlockRepository, events: &dyn EventPublishe
     Ok(())
 }
 
-pub async fn unblock_user(blocks: &dyn BlockRepository, blocker_id: &UserId, blocked_id: &UserId) -> Result<(), DomainError> {
+pub async fn unblock_user(
+    blocks: &dyn BlockRepository,
+    events: &dyn EventPublisher,
+    blocker_id: &UserId,
+    blocked_id: &UserId,
+) -> Result<(), DomainError> {
     blocks.delete(blocker_id, blocked_id).await?;
+    events.publish(&DomainEvent::UserUnblocked {
+        blocker_id: blocker_id.clone(),
+        blocked_id: blocked_id.clone(),
+    }).await?;
     Ok(())
 }
 
@@ -114,4 +123,17 @@ mod tests {
         let err = follow_user(&store, &store, &alice.id, &alice.id).await.unwrap_err();
         assert!(matches!(err, DomainError::InvalidInput(_)));
     }
+
+    #[tokio::test]
+    async fn unblock_user_publishes_event() {
+        let store = TestStore::default();
+        let alice = user("alice");
+        let bob = user("bob");
+        block_user(&store, &store, &alice.id, &bob.id).await.unwrap();
+        store.events.lock().unwrap().clear();
+        unblock_user(&store, &store, &alice.id, &bob.id).await.unwrap();
+        let events = store.events.lock().unwrap();
+        assert_eq!(events.len(), 1);
+        assert!(matches!(events[0], DomainEvent::UserUnblocked { .. }));
+    }
 }