[pm_triggers] WIP extension to send PMs on certain events

ext/pm_triggers/info.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shimmie2;
+
+class PMTriggerInfo extends ExtensionInfo
+{
+    public const KEY = "pm_triggers";
+
+    public string $key = self::KEY;
+    public string $name = "PM triggers";
+    public string $url = self::SHIMMIE_URL;
+    public array $authors = self::SHISH_AUTHOR;
+    public string $license = self::LICENSE_GPLV2;
+    public string $description = "Send PMs in response to certain events (eg post deletion)";
+    public bool $beta = true;
+}

ext/pm_triggers/main.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shimmie2;
+
+class PMTrigger extends Extension
+{
+    public function onImageDeletion(ImageDeletionEvent $event)
+    {
+        $this->send(
+            $event->image->owner_id,
+            "[System] A post you uploaded has been deleted",
+            "Post le gone~ (#{$event->image->id}, {$event->image->get_tag_list()})"
+        );
+    }
+
+    private function send($to_id, $subject, $body)
+    {
+        global $user;
+        send_event(new SendPMEvent(new PM(
+            $user->id,
+            get_real_ip(),
+            $to_id,
+            $subject,
+            $body
+        )));
+    }
+}