Mark instance as alive after successful activity send (fixes #4039) (#4377)

* Mark instance as alive after successful activity send (fixes #4039)

* clippy

* Instance::update

* domain

---------

Co-authored-by: Dessalines <dessalines@users.noreply.github.com>

crates/db_schema/src/impls/instance.rs

@@ -64,6 +64,18 @@ impl Instance {
       e => e,
     }
   }
+  pub async fn update(
+    pool: &mut DbPool<'_>,
+    instance_id: InstanceId,
+    form: InstanceForm,
+  ) -> Result<usize, Error> {
+    let mut conn = get_conn(pool).await?;
+    diesel::update(instance::table.find(instance_id))
+      .set(form)
+      .execute(&mut conn)
+      .await
+  }
+
   pub async fn delete(pool: &mut DbPool<'_>, instance_id: InstanceId) -> Result<usize, Error> {
     let conn = &mut get_conn(pool).await?;
     diesel::delete(instance::table.find(instance_id))

crates/federate/src/worker.rs

@@ -11,7 +11,7 @@ use activitypub_federation::{
   protocol::context::WithContext,
 };
 use anyhow::{Context, Result};
-use chrono::{DateTime, TimeZone, Utc};
+use chrono::{DateTime, Days, TimeZone, Utc};
 use lemmy_api_common::{context::LemmyContext, federate_retry_sleep_duration};
 use lemmy_apub::{activity_lists::SharedInboxActivities, FEDERATION_CONTEXT};
 use lemmy_db_schema::{
@@ -19,17 +19,17 @@ use lemmy_db_schema::{
   source::{
     activity::SentActivity,
     federation_queue_state::FederationQueueState,
-    instance::Instance,
+    instance::{Instance, InstanceForm},
     site::Site,
   },
-  utils::DbPool,
+  utils::{naive_now, DbPool},
 };
 use lemmy_db_views_actor::structs::CommunityFollowerView;
 use once_cell::sync::Lazy;
 use reqwest::Url;
 use std::{
   collections::{HashMap, HashSet},
-  ops::Deref,
+  ops::{Add, Deref},
   time::Duration,
 };
 use tokio::{sync::mpsc::UnboundedSender, time::sleep};
@@ -257,6 +257,18 @@ impl InstanceWorker {
           }
         }
       }
+
+      // Activity send successful, mark instance as alive if it hasn't been updated in a while.
+      let updated = self.instance.updated.unwrap_or(self.instance.published);
+      if updated.add(Days::new(1)) < Utc::now() {
+        self.instance.updated = Some(Utc::now());
+
+        let form = InstanceForm::builder()
+          .domain(self.instance.domain.clone())
+          .updated(Some(naive_now()))
+          .build();
+        Instance::update(pool, self.instance.id, form).await?;
+      }
     }
     Ok(())
   }

src/scheduled_tasks.rs

@@ -495,10 +495,7 @@ async fn update_instance_software(
           }
         };
         if let Some(form) = form {
-          diesel::update(instance::table.find(instance.id))
-            .set(form)
-            .execute(&mut conn)
-            .await?;
+          Instance::update(pool, instance.id, form).await?;
         }
       }
       info!("Finished updating instances software and versions...");