Change actor status to "unreachable" if delivery to inbox fails

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Added `/api/v1/accounts/lookup` Mastodon API endpoint.
 - Implemented activity delivery queue.
+- Started to keep track of unreachable actors.
 
 ### Changed
 

migrations/V0037__actor_profile__add_unreachable_since.sql

@@ -0,0 +1 @@
+ALTER TABLE actor_profile ADD COLUMN unreachable_since TIMESTAMP WITH TIME ZONE;

migrations/schema.sql

@@ -32,6 +32,7 @@ CREATE TABLE actor_profile (
     actor_id VARCHAR(200) UNIQUE GENERATED ALWAYS AS (actor_json ->> 'id') STORED,
     created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
     updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    unreachable_since TIMESTAMP WITH TIME ZONE,
     CHECK ((hostname IS NULL) = (actor_json IS NULL))
 );
 

src/activitypub/deliverer.rs

@@ -10,7 +10,7 @@ use tokio::time::sleep;
 use tokio_postgres::GenericClient;
 
 use crate::config::Instance;
-use crate::database::DatabaseError;
+use crate::database::{get_database_client, DatabaseError, DbPool};
 use crate::http_signatures::create::{
     create_http_signature,
     HttpSignatureError,
@@ -20,7 +20,10 @@ use crate::json_signatures::create::{
     sign_object,
     JsonSignatureError,
 };
-use crate::models::users::types::User;
+use crate::models::{
+    profiles::queries::set_reachability_status,
+    users::types::User,
+};
 use crate::utils::crypto_rsa::deserialize_private_key;
 use super::actors::types::Actor;
 use super::constants::{AP_MEDIA_TYPE, ACTOR_KEY_SUFFIX};
@@ -46,6 +49,9 @@ pub enum DelivererError {
 
     #[error("http error {0:?}")]
     HttpError(reqwest::StatusCode),
+
+    #[error(transparent)]
+    DatabaseError(#[from] DatabaseError),
 }
 
 fn build_client(instance: &Instance) -> reqwest::Result<Client> {
@@ -117,6 +123,7 @@ pub struct Recipient {
 }
 
 async fn deliver_activity_worker(
+    maybe_db_pool: Option<DbPool>,
     instance: Instance,
     sender: User,
     activity: Value,
@@ -185,6 +192,18 @@ async fn deliver_activity_worker(
         };
         retry_count += 1;
     };
+
+    if let Some(ref db_pool) = maybe_db_pool {
+        // Get connection from pool only after finishing delivery
+        let db_client = &**get_database_client(db_pool).await?;
+        for (recipient, is_delivered) in queue {
+            set_reachability_status(
+                db_client,
+                &recipient.id,
+                is_delivered,
+            ).await?;
+        };
+    };
     Ok(())
 }
 
@@ -224,6 +243,7 @@ impl OutgoingActivity {
 
     pub async fn deliver(self) -> Result<(), DelivererError> {
         deliver_activity_worker(
+            None,
             self.instance,
             self.sender,
             self.activity,
@@ -243,6 +263,23 @@ impl OutgoingActivity {
         });
     }
 
+    pub fn spawn_deliver_with_tracking(
+        self,
+        db_pool: DbPool,
+    ) -> () {
+        tokio::spawn(async move {
+            deliver_activity_worker(
+                Some(db_pool),
+                self.instance,
+                self.sender,
+                self.activity,
+                self.recipients,
+            ).await.unwrap_or_else(|err| {
+                log::error!("{}", err);
+            });
+        });
+    }
+
     pub async fn enqueue(
         self,
         db_client: &impl GenericClient,

src/activitypub/queues.rs

@@ -5,7 +5,12 @@ use tokio_postgres::GenericClient;
 use uuid::Uuid;
 
 use crate::config::Config;
-use crate::database::{DatabaseError, DatabaseTypeError};
+use crate::database::{
+    get_database_client,
+    DatabaseError,
+    DatabaseTypeError,
+    DbPool,
+};
 use crate::models::{
     background_jobs::queries::{
         enqueue_job,
@@ -122,8 +127,9 @@ impl OutgoingActivityJobData {
 
 pub async fn process_queued_outgoing_activities(
     config: &Config,
-    db_client: &impl GenericClient,
+    db_pool: &DbPool,
 ) -> Result<(), DatabaseError> {
+    let db_client = &**get_database_client(db_pool).await?;
     let batch_size = 1;
     let batch = get_job_batch(
         db_client,
@@ -141,7 +147,7 @@ pub async fn process_queued_outgoing_activities(
             activity: job_data.activity,
             recipients: job_data.recipients,
         };
-        outgoing_activity.spawn_deliver();
+        outgoing_activity.spawn_deliver_with_tracking(db_pool.clone());
         delete_job_from_queue(db_client, &job.id).await?;
     };
     Ok(())

src/job_queue/scheduler.rs

@@ -130,8 +130,7 @@ async fn outgoing_activity_queue_task(
     config: &Config,
     db_pool: &DbPool,
 ) -> Result<(), Error> {
-    let db_client = &**get_database_client(db_pool).await?;
-    process_queued_outgoing_activities(config, db_client).await?;
+    process_queued_outgoing_activities(config, db_pool).await?;
     Ok(())
 }
 

src/models/profiles/queries.rs

@@ -576,6 +576,36 @@ pub async fn update_post_count(
     Ok(profile)
 }
 
+// Doesn't return error if profile doesn't exist
+pub async fn set_reachability_status(
+    db_client: &impl GenericClient,
+    actor_id: &str,
+    is_reachable: bool,
+) -> Result<(), DatabaseError> {
+    if !is_reachable {
+        // Don't update profile if unreachable_since is already set
+        db_client.execute(
+            "
+            UPDATE actor_profile
+            SET unreachable_since = CURRENT_TIMESTAMP
+            WHERE actor_id = $1 AND unreachable_since IS NULL
+            ",
+            &[&actor_id],
+        ).await?;
+    } else {
+        // Remove status (if set)
+        db_client.execute(
+            "
+            UPDATE actor_profile
+            SET unreachable_since = NULL
+            WHERE actor_id = $1
+            ",
+            &[&actor_id],
+        ).await?;
+    };
+    Ok(())
+}
+
 /// Finds all empty remote profiles
 /// (without any posts, reactions, relationships)
 /// updated before the specified date
@@ -812,6 +842,23 @@ mod tests {
         assert_eq!(profiles[0].id, profile.id);
     }
 
+    #[tokio::test]
+    #[serial]
+    async fn test_set_reachability_status() {
+        let db_client = &create_test_database().await;
+        let actor_id = "https://example.com/users/test";
+        let profile_data = ProfileCreateData {
+            username: "test".to_string(),
+            hostname: Some("example.com".to_string()),
+            actor_json: Some(create_test_actor(actor_id)),
+            ..Default::default()
+        };
+        let profile = create_profile(db_client, profile_data).await.unwrap();
+        set_reachability_status(db_client, actor_id, false).await.unwrap();
+        let profile = get_profile_by_id(db_client, &profile.id).await.unwrap();
+        assert_eq!(profile.unreachable_since.is_some(), true);
+    }
+
     #[tokio::test]
     #[serial]
     async fn test_find_empty_profiles() {

src/models/profiles/types.rs

@@ -302,6 +302,7 @@ pub struct DbActorProfile {
     pub actor_json: Option<Actor>,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
+    pub unreachable_since: Option<DateTime<Utc>>,
 
     // auto-generated database fields
     pub acct: String,
@@ -381,6 +382,7 @@ impl Default for DbActorProfile {
             actor_id: None,
             created_at: now,
             updated_at: now,
+            unreachable_since: None,
         }
     }
 }