From d86f36e4becbe40766598816f837042aad4ce145 Mon Sep 17 00:00:00 2001
From: winter
Date: Sun, 4 May 2025 21:04:18 +0100
Subject: allow following actors with no follow endpoint

---
 Digitigrade/Job/PeriodicFetchRemoteFeed.php | 37 +++++++++++++++++++++++++++++
 Digitigrade/Job/ProcessIncomingPush.php     | 14 +++++++----
 Digitigrade/Model/Actor.php                 | 17 +++++++++++++
 3 files changed, 64 insertions(+), 4 deletions(-)
 create mode 100644 Digitigrade/Job/PeriodicFetchRemoteFeed.php

(limited to 'Digitigrade')

diff --git a/Digitigrade/Job/PeriodicFetchRemoteFeed.php b/Digitigrade/Job/PeriodicFetchRemoteFeed.php
new file mode 100644
index 0000000..e84757f
--- /dev/null
+++ b/Digitigrade/Job/PeriodicFetchRemoteFeed.php
@@ -0,0 +1,37 @@
+<?php
+namespace Digitigrade\Job;
+
+use Digitigrade\GlobalSettings;
+use Digitigrade\Job;
+use Digitigrade\JobQueue;
+use Digitigrade\Logger;
+use Digitigrade\Model\Actor;
+
+class PeriodicFetchRemoteFeed extends Job {
+    public int $actorId;
+
+    public function __construct(Actor $targetActor) {
+        $this->actorId = $targetActor->id;
+        $this->remainingTries = 8;
+    }
+
+    public function run() {
+        $actor = Actor::find($this->actorId);
+        $logger = Logger::getInstance();
+        // only bother if someone local still follows the actor
+        if (count(array_filter($actor->findFollowers(), fn(Actor $a) => $a->isLocal)) > 0) {
+            $logger->info('Fetching feed for simple remote actor ' . $actor->getFullHandle());
+            $actor->backfill(GlobalSettings::getInstance()->get('instance.feedUpdateLimit') ?? 50);
+            $this->submit();
+        } else {
+            $logger->info('No longer fetching feed for ' . $actor->getFullHandle() . ' as nobody follows them anymore');
+        }
+    }
+
+    public function submit() {
+        JobQueue::getInstance()->submitDelayedUntil(
+            $this,
+            (new \DateTimeImmutable)->add(new \DateInterval(GlobalSettings::getInstance()->get('instance.feedUpdateInterval') ?? 'PT1H'))
+        );
+    }
+}
\ No newline at end of file
diff --git a/Digitigrade/Job/ProcessIncomingPush.php b/Digitigrade/Job/ProcessIncomingPush.php
index 600972c..16dd1ce 100644
--- a/Digitigrade/Job/ProcessIncomingPush.php
+++ b/Digitigrade/Job/ProcessIncomingPush.php
@@ -34,15 +34,21 @@ class ProcessIncomingPush extends Job {
                 break;
             case 'note':
                 $log->info('importing note with uri ' . $this->object->self);
+                $alreadyExisted = Note::countWhere('uri = ?', [$this->object->self]) > 0;
                 $note = Note::importFromReceivedObject($this->object);
-                $note?->processTimelineAdditions();
-                $note?->processNotifications();
+                if (!$alreadyExisted) {
+                    $note?->processTimelineAdditions();
+                    $note?->processNotifications();
+                }
                 break;
             case 'interaction':
                 $log->info('importing interaction with uri ' . $this->object->self);
+                $alreadyExisted = Interaction::countWhere('uri = ?', [$this->object->self]) > 0;
                 $interaction = Interaction::importFromReceivedObject($this->object);
-                $interaction?->processTimelineAdditions();
-                $interaction?->processNotifications();
+                if (!$alreadyExisted) {
+                    $interaction?->processTimelineAdditions();
+                    $interaction?->processNotifications();
+                }
                 break;
             case 'extension':
                 throw new \RuntimeException('object type ' . $this->object->type . ' not yet implemented :(');
diff --git a/Digitigrade/Model/Actor.php b/Digitigrade/Model/Actor.php
index ffaf4e8..3fb7e4e 100644
--- a/Digitigrade/Model/Actor.php
+++ b/Digitigrade/Model/Actor.php
@@ -2,6 +2,7 @@
 namespace Digitigrade\Model;
 
 use Digitigrade\Db;
+use Digitigrade\Job\PeriodicFetchRemoteFeed;
 use Digitigrade\Job\ProcessIncomingPush;
 use Digitigrade\Job\ProcessIncomingSimplePush;
 use Digitigrade\Notification\PendingFollowActionedNotif;
@@ -254,10 +255,26 @@ class Actor extends PushableModel implements RpcReceiver {
      * @return FollowRelationStatus PENDING if a request was sent or ACTIVE if the follow went through immediately
      */
     public function follow(self $target): FollowRelationStatus {
+        // handle actors with no follow endpoint
+        if (!$target->isLocal && !isset($target->endpoints->follow, $target->endpoints->unfollow)) {
+            // if this is the first time someone local followed this actor, put a job in to update them
+            if (count(array_filter($target->findFollowers(), fn(Actor $a) => $a->isLocal)) == 0) {
+                (new PeriodicFetchRemoteFeed($target))->submit();
+            }
+            FollowRelation::create($this, $target, FollowRelationStatus::ACTIVE);
+            // no need to processNotifications because it's always going to be a remote user & not pending
+            return FollowRelationStatus::ACTIVE;
+        }
+
         return $target->rpcCall('follow', [$this]);
     }
 
     public function unfollow(self $target) {
+        // handle actors with no follow endpoint
+        if (!$target->isLocal && !isset($target->endpoints->follow, $target->endpoints->unfollow)) {
+            FollowRelation::findByActors($this, $target)?->remove();
+            return;
+        }
         $target->rpcCall('unfollow', [$this]);
     }
 
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