Expand settings for notifications.

app/Notifications/ReturnsAvailableChannels.php

@@ -0,0 +1,46 @@
+<?php
+/*
+ * ReturnsAvailableChannels.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Notifications;
+
+use FireflyIII\Support\Notifications\UrlValidator;
+
+class ReturnsAvailableChannels
+{
+    public static function returnChannels(string $type): array {
+        $channels = ['mail'];
+
+        if('owner' === $type) {
+            $slackUrl = app('fireflyconfig')->get('slack_webhook_url', '')->data;
+            if (UrlValidator::isValidWebhookURL($slackUrl)) {
+                $channels[] = 'slack';
+            }
+            // only the owner can get notifications over
+        }
+
+
+
+        return $channels;
+    }
+
+}