From ec925c3d8dabfeb6569d4315cff4f081868c8c13 Mon Sep 17 00:00:00 2001
From: Johannes Rauh <johannes.rauh@icinga.com>
Date: Tue, 20 Aug 2024 13:54:39 +0200
Subject: [PATCH] Add config tab for Prometheus

---
 application/controllers/ConfigController.php | 41 ++++++++++++
 application/forms/PrometheusConfigForm.php   | 68 ++++++++++++++++++++
 configuration.php                            |  9 +++
 3 files changed, 118 insertions(+)
 create mode 100644 application/forms/PrometheusConfigForm.php

diff --git a/application/controllers/ConfigController.php b/application/controllers/ConfigController.php
index 9309b543..e13a8818 100644
--- a/application/controllers/ConfigController.php
+++ b/application/controllers/ConfigController.php
@@ -11,6 +11,7 @@
 use Icinga\Module\Kubernetes\Common\Database;
 use Icinga\Module\Kubernetes\Forms\DatabaseConfigForm;
 use Icinga\Module\Kubernetes\Forms\NotificationsConfigForm;
+use Icinga\Module\Kubernetes\Forms\PrometheusConfigForm;
 use Icinga\Module\Kubernetes\Model\Config as KConfig;
 use Icinga\Module\Kubernetes\Web\Controller;
 use Icinga\Module\Notifications\Common\Database as NotificationsDatabase;
@@ -177,6 +178,46 @@ function (NotificationsConfigForm $form) use ($kconfig, $sourceForm) {
         $this->addContent($form);
     }
 
+    public function prometheusAction()
+    {
+        $db = Database::connection();
+        $dbConfig = KConfig::on($db)->filter(Filter::equal('key', 'prometheus.url'))->first();
+
+//        $config = Config::module('kubernetes');
+        $form = (new PrometheusConfigForm())
+            ->populate(['prometheus_url' => $dbConfig->value])
+            ->on(PrometheusConfigForm::ON_SUCCESS, function ($form) use ($db, $dbConfig) {
+                if ($form->isLocked()) {
+                    Notification::error($this->translate('Prometheus configuration is locked'));
+                    return;
+                }
+
+//                $config->setSection('prometheus', $form->getValues());
+//                $config->saveIni();
+
+                if ($dbConfig) {
+                    $db->update('config',
+                        ['value' => $form->getValue('prometheus_url')],
+                        [$db->quoteIdentifier('key') . ' = ?' => 'prometheus.url']
+                    );
+                } else {
+                    $db->insert('config',
+                        [
+                            $db->quoteIdentifier('key') => 'prometheus.url',
+                            'value'                     => $form->getValue('prometheus_url')
+                        ]
+                    );
+                }
+
+
+                Notification::success($this->translate('New configuration has successfully been stored'));
+            })->handleRequest($this->getServerRequest());
+
+        $this->mergeTabs($this->Module()->getConfigTabs()->activate('prometheus'));
+
+        $this->addContent($form);
+    }
+
     /**
      * Merge tabs with other tabs contained in this tab panel
      *
diff --git a/application/forms/PrometheusConfigForm.php b/application/forms/PrometheusConfigForm.php
new file mode 100644
index 00000000..e68522ce
--- /dev/null
+++ b/application/forms/PrometheusConfigForm.php
@@ -0,0 +1,68 @@
+<?php
+
+/* Icinga for Kubernetes Web | (c) 2024 Icinga GmbH | AGPLv3 */
+
+namespace Icinga\Module\Kubernetes\Forms;
+
+use Icinga\Data\ResourceFactory;
+use ipl\Html\Attributes;
+use ipl\Html\Html;
+use ipl\Html\HtmlElement;
+use ipl\Web\Compat\CompatForm;
+use Icinga\Module\Kubernetes\Model\Config;
+use ipl\Stdlib\Filter;
+use Icinga\Module\Kubernetes\Common\Database;
+
+class PrometheusConfigForm extends CompatForm
+{
+    protected function assemble(): void
+    {
+        if ($this->isLocked()) {
+            $this->addHtml(
+                Html::tag('div', Attributes::create(['class' => 'control-group']), [
+                    Html::tag(
+                      'div',
+                        Attributes::create(['class' => 'control-label-group']),
+                    ),
+                    Html::tag(
+                        'p',
+                        Attributes::create(),
+                        "Prometheus configuration is provided via YAML."
+                    )
+                ])
+            );
+        }
+
+        $this->addElement(
+            'text',
+            'prometheus_url',
+            [
+                'label'    => $this->translate('URL'),
+                'required' => true,
+                'disabled' => $this->isLocked(),
+                'value'    => ''
+            ]
+        );
+
+        $this->addElement(
+            'submit',
+            'submit',
+            [
+                'label' => $this->translate('Save Changes'),
+                'disabled' => $this->isLocked()
+            ]
+        );
+    }
+
+    public function isLocked(): bool
+    {
+        $config = Config::on(Database::connection());
+        $config->filter(Filter::equal('key', 'prometheus.locked'));
+
+        if (isset($config->first()->value) && $config->first()->value === 'true') {
+            return true;
+        }
+
+        return false;
+    }
+}
diff --git a/configuration.php b/configuration.php
index 5f2f4293..3ec9be74 100644
--- a/configuration.php
+++ b/configuration.php
@@ -189,6 +189,15 @@
     );
 }
 
+$this->provideConfigTab(
+    'prometheus',
+    [
+        'title' => $this->translate('Prometheus'),
+        'label' => $this->translate('Prometheus'),
+        'url'   => 'config/prometheus'
+    ]
+);
+
 $this->providePermission(
     Auth::SHOW_CONFIG_MAPS,
     $this->translate('Allow to show config maps')