From bfe58ba4ec8419ebc40d8dd8d972d71bd5019ab1 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Thu, 11 Nov 2021 16:13:41 +0100
Subject: [PATCH] Introduce new hook `IcingadbSupportHook`

---
 library/Icingadb/Hook/IcingadbSupportHook.php | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 library/Icingadb/Hook/IcingadbSupportHook.php

diff --git a/library/Icingadb/Hook/IcingadbSupportHook.php b/library/Icingadb/Hook/IcingadbSupportHook.php
new file mode 100644
index 00000000..8de77a72
--- /dev/null
+++ b/library/Icingadb/Hook/IcingadbSupportHook.php
@@ -0,0 +1,52 @@
+<?php
+
+/* Icinga DB Web | (c) 2021 Icinga GmbH | GPLv2 */
+
+namespace Icinga\Module\Icingadb\Hook;
+
+use Icinga\Application\Icinga;
+use Icinga\Authentication\Auth;
+use Icinga\Module\Icingadb\Hook\Common\HookUtils;
+
+abstract class IcingadbSupportHook
+{
+    use HookUtils;
+
+    /** @var string key name of preference */
+    const PREFERENCE_NAME = 'icingadb_as_backend';
+
+    /**
+     * Return whether your module supports IcingaDB or not
+     *
+     * @return bool
+     */
+    public function supportsIcingaDb(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Whether icingadb is set as the preferred backend in preferences
+     *
+     * @return bool Return true if icingadb is set as backend, false otherwise
+     */
+    final public static function isIcingaDbSetAsPreferredBackend(): bool
+    {
+        $webPreferences = Auth::getInstance()->getUser()->getPreferences()->get('icingaweb');
+        if (! empty($webPreferences) && array_key_exists(static::PREFERENCE_NAME, $webPreferences)) {
+            return (bool) $webPreferences[static::PREFERENCE_NAME];
+        }
+
+        return false;
+    }
+
+    /**
+     * Whether to use icingadb as the backend
+     *
+     * @return bool Returns true if monitoring module is disabled or icingadb is selected as backend, false otherwise.
+     */
+    final public static function useIcingaDbAsBackend(): bool
+    {
+        return ! Icinga::app()->getModuleManager()->hasEnabled('monitoring') || self::isSetAsBackend();
+    }
+}