From 40b45b2a115fa1fa6b923e55e55db7615ae2d472 Mon Sep 17 00:00:00 2001
From: Daniel Supernault <danielsupernault@gmail.com>
Date: Fri, 16 Feb 2024 02:15:39 -0700
Subject: [PATCH] Update Autospam, add live filters to block remote activities
 based on comma separated keywords

---
 app/Util/ActivityPub/Helpers.php | 17 +++++++++++++++++
 app/Util/ActivityPub/Inbox.php   | 16 ++++++++++++++++
 config/autospam.php              |  5 +++++
 3 files changed, 38 insertions(+)

diff --git a/app/Util/ActivityPub/Helpers.php b/app/Util/ActivityPub/Helpers.php
index 6f5b8ae11..e25fd93b7 100644
--- a/app/Util/ActivityPub/Helpers.php
+++ b/app/Util/ActivityPub/Helpers.php
@@ -315,6 +315,23 @@ class Helpers {
             return;
         }
 
+        if(config('autospam.live_filters.enabled')) {
+            $filters = config('autospam.live_filters.filters');
+            if(!empty($filters) && isset($res['content']) && !empty($res['content']) && strlen($filters) > 3) {
+                $filters = array_map('trim', explode(',', $filters));
+                $content = $res['content'];
+                foreach($filters as $filter) {
+                    $filter = trim($filter);
+                    if(!$filter || !strlen($filter)) {
+                        continue;
+                    }
+                    if(str_contains($content, $filter)) {
+                        return;
+                    }
+                }
+            }
+        }
+
         if(isset($res['object'])) {
             $activity = $res;
         } else {
diff --git a/app/Util/ActivityPub/Inbox.php b/app/Util/ActivityPub/Inbox.php
index 5c9959e17..b6ae80893 100644
--- a/app/Util/ActivityPub/Inbox.php
+++ b/app/Util/ActivityPub/Inbox.php
@@ -197,6 +197,22 @@ class Inbox
     public function handleCreateActivity()
     {
         $activity = $this->payload['object'];
+        if(config('autospam.live_filters.enabled')) {
+            $filters = config('autospam.live_filters.filters');
+            if(!empty($filters) && isset($activity['content']) && !empty($activity['content']) && strlen($filters) > 3) {
+                $filters = array_map('trim', explode(',', $filters));
+                $content = $activity['content'];
+                foreach($filters as $filter) {
+                    $filter = trim($filter);
+                    if(!$filter || !strlen($filter)) {
+                        continue;
+                    }
+                    if(str_contains($content, $filter)) {
+                        return;
+                    }
+                }
+            }
+        }
         $actor = $this->actorFirstOrCreate($this->payload['actor']);
         if(!$actor || $actor->domain == null) {
             return;
diff --git a/config/autospam.php b/config/autospam.php
index 39975ec9b..bc0ce4681 100644
--- a/config/autospam.php
+++ b/config/autospam.php
@@ -33,5 +33,10 @@ return [
     'nlp' => [
     	'enabled' => false,
     	'spam_sample_limit' => env('PF_AUTOSPAM_NLP_SPAM_SAMPLE_LIMIT', 200),
+    ],
+
+    'live_filters' => [
+        'enabled' => env('PF_AUTOSPAM_LIVE_FILTERS_ENABLED', false),
+        'filters' => env('PF_AUTOSPAM_LIVE_FILTERS_CSV', ''),
     ]
 ];