Merge pull request #1 from blomstra/im/dismiss-dupe-flags

Add listener, auto dismiss duplicate flags after merge

extend.php

@@ -13,6 +13,7 @@
 
 use Flarum\Api\Controller\ShowDiscussionController;
 use Flarum\Extend;
+use FoF\MergeDiscussions\Events\DiscussionWasMerged;
 
 return [
     (new Extend\Frontend('forum'))
@@ -23,4 +24,7 @@
 
     (new Extend\ApiController(ShowDiscussionController::class))
         ->addInclude(['firstPost']),
+
+    (new Extend\Event())
+        ->listen(DiscussionWasMerged::class, Listener\RemoveDuplicateFlagAfterMerge::class),
 ];

src/Listener/RemoveDuplicateFlagAfterMerge.php

@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of blomstra/flag-duplicates.
+ *
+ * Copyright (c) 2022 Blomstra Ltd.
+ *
+ * For the full copyright and license information, please view the LICENSE.md
+ * file that was distributed with this source code.
+ */
+
+namespace Blomstra\FlagDuplicates\Listener;
+
+use Flarum\Flags\Event\Deleting;
+use Flarum\Flags\Flag;
+use FoF\MergeDiscussions\Events\DiscussionWasMerged;
+use Illuminate\Contracts\Events\Dispatcher;
+use Illuminate\Database\Eloquent\Collection;
+
+class RemoveDuplicateFlagAfterMerge
+{
+    /** @var Dispatcher */
+    protected $events;
+
+    public function __construct(Dispatcher $events)
+    {
+        $this->events = $events;
+    }
+
+    public function handle(DiscussionWasMerged $event)
+    {
+        $discussion = $event->discussion;
+
+        /** @var array $postIds */
+        $postIds = $discussion->posts->pluck('id');
+
+        /** @var Collection $flags */
+        $flags = Flag::where('reason', 'duplicate')->whereIn('post_id', $postIds)->where('reason_detail', $discussion->id)->get();
+
+        foreach ($flags as $flag) {
+            /** @var Flag $flag */
+            $this->events->dispatch(new Deleting($flag, $event->actor));
+            $flag->delete();
+        }
+
+        $discussion->refresh();
+    }
+}