purge: skip broadcasts of deleted authors, purge outbox log, guards, 410 inbox test

crates/adapters/sqlite/src/repositories/account_purge/mod.rs

@@ -34,9 +34,19 @@ pub const PURGED_USER_TABLES: &[(&str, &str)] = &[
 /// the keypair is needed to sign queued federation deliveries.
 pub const RETAINED_USER_TABLES: &[&str] = &["ap_local_actors"];
 
-/// Tables with no user column whose rows hang off the user's content or actor
-/// URL; the purge clears them by URL.
-pub const URL_KEYED_USER_TABLES: &[&str] = &["ap_announces", "ap_followers", "ap_following"];
+/// Columns that identify the user by actor or content URL rather than by id.
+/// The purge matches rows on them; the guard test asserts each still exists so
+/// a rename cannot silently stop the purge from clearing them.
+pub const URL_KEYED_USER_COLUMNS: &[(&str, &str)] = &[
+    ("ap_announces", "object_url"),
+    ("ap_announces", "actor_url"),
+    ("ap_followers", "remote_actor_url"),
+    ("ap_following", "remote_actor_url"),
+];
+
+/// Columns holding serialized events and activities that carry the user's id
+/// (the outbox log keeps finished rows, including authored activity JSON).
+pub const PAYLOAD_KEYED_USER_COLUMNS: &[(&str, &str)] = &[("event_queue", "payload")];
 
 pub struct SqliteAccountPurger {
     pool: SqlitePool,
@@ -116,6 +126,22 @@ impl AccountPurger for SqliteAccountPurger {
         .await
         .map_err(map_sqlx_error)?;
 
+        // The outbox log: events and signed activities authored as this user.
+        // The `UserDeleted` row (which triggered this run) and the pending
+        // `Delete` deliveries must stay; both go with the tombstone.
+        sqlx::query(
+            "DELETE FROM event_queue
+             WHERE instr(payload, ?1) > 0
+               AND event_type != 'UserDeleted'
+               AND NOT (event_type = 'FederationDeliveryRequested'
+                        AND status IN ('pending', 'processing')
+                        AND instr(payload, '\"type\":\"Delete\"') > 0)",
+        )
+        .bind(&id)
+        .execute(&mut *tx)
+        .await
+        .map_err(map_sqlx_error)?;
+
         // Other accounts' follows of this one.
         for table in ["ap_followers", "ap_following"] {
             sqlx::query(&format!("DELETE FROM {table} WHERE remote_actor_url = ?"))
@@ -158,6 +184,22 @@ impl AccountPurger for SqliteAccountPurger {
     ) -> Result<u64, DomainError> {
         let cutoff = cutoff.format(TIMESTAMP_FORMAT).to_string();
         let mut tx = self.pool.begin().await.map_err(map_sqlx_error)?;
+        let expiring: Vec<String> = sqlx::query_scalar(
+            "SELECT id FROM users WHERE purged_at IS NOT NULL AND purged_at < ?",
+        )
+        .bind(&cutoff)
+        .fetch_all(&mut *tx)
+        .await
+        .map_err(map_sqlx_error)?;
+        for id in &expiring {
+            // What the purge had to leave: the `UserDeleted` row and the
+            // `Delete` deliveries.
+            sqlx::query("DELETE FROM event_queue WHERE instr(payload, ?) > 0")
+                .bind(id)
+                .execute(&mut *tx)
+                .await
+                .map_err(map_sqlx_error)?;
+        }
         for table in RETAINED_USER_TABLES {
             sqlx::query(&format!(
                 "DELETE FROM {table} WHERE user_id IN (