Introduce DashboardUserManager trait

library/Icinga/Web/Dashboard/Common/DashboardUserManager.php

@@ -0,0 +1,86 @@
+<?php
+
+/* Icinga Web 2 | (c) 2022 Icinga GmbH | GPLv2+ */
+
+namespace Icinga\Web\Dashboard\Common;
+
+use Icinga\Authentication\Auth;
+use Icinga\Model\DashboardOwner;
+use Icinga\User;
+use Icinga\Util\DBUtils;
+use ipl\Stdlib\Filter;
+
+// TODO: Remove this completely as soon as we have introduced a daemon in Icinga Web 2.
+trait DashboardUserManager
+{
+    /** @var User */
+    private static $user;
+
+    /**
+     * Init the current user
+     *
+     * Just ensures that the current user is stored in the DB
+     *
+     * @return void
+     */
+    protected static function initUser()
+    {
+        if (! self::userExist()) {
+            $conn = DBUtils::getConn();
+            $conn->insert('icingaweb_dashboard_owner', ['username' => self::getUser()->getUsername()]);
+
+            self::getUser()->setAdditional('id', $conn->lastInsertId());
+        }
+    }
+
+    /**
+     * Set this dashboard's user
+     *
+     * @param User $user
+     *
+     * @return $this
+     */
+    public function setUser(User $user): self
+    {
+        self::$user = $user;
+        self::initUser();
+
+        return $this;
+    }
+
+    /**
+     * Get this dashboard's user
+     *
+     * @return User
+     */
+    public static function getUser(): User
+    {
+        if (self::$user === null) {
+            self::$user = Auth::getInstance()->getUser();
+            self::initUser();
+        }
+
+        return self::$user;
+    }
+
+    /**
+     * Get whether the current user is already in the database
+     *
+     * @return bool
+     */
+    public static function userExist(): bool
+    {
+        $query = DashboardOwner::on(DBUtils::getConn())
+            ->setColumns(['id'])
+            ->filter(Filter::equal('username', self::getUser()->getUsername()));
+
+        $found = false;
+        $result = $query->execute();
+        if ($result->hasResult()) {
+            $found = true;
+            self::getUser()->setAdditional('id', $result->current()->id);
+        }
+
+        return $found;
+    }
+}