From 69d8c7cd887cc5a5269793975f1860b8ae7d5212 Mon Sep 17 00:00:00 2001
From: Sukhwinder Dhillon <sukhwinder33445@gmail.com>
Date: Fri, 21 Jun 2024 11:18:15 +0200
Subject: [PATCH] Channel: Don't allow to delete channel if in use

---
 application/forms/ChannelForm.php | 27 ++++++++++++++++++++++++++-
 public/css/form.less              |  8 ++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/application/forms/ChannelForm.php b/application/forms/ChannelForm.php
index 7bb56455a..45f5c915d 100644
--- a/application/forms/ChannelForm.php
+++ b/application/forms/ChannelForm.php
@@ -7,6 +7,8 @@
 use Icinga\Exception\Http\HttpNotFoundException;
 use Icinga\Module\Notifications\Model\Channel;
 use Icinga\Module\Notifications\Model\AvailableChannelType;
+use Icinga\Module\Notifications\Model\Contact;
+use Icinga\Module\Notifications\Model\RuleEscalationRecipient;
 use Icinga\Web\Session;
 use ipl\Html\Contract\FormSubmitElement;
 use ipl\Html\FormElement\BaseFormElement;
@@ -52,6 +54,7 @@ public function __construct(Connection $db)
 
     protected function assemble()
     {
+        $this->addAttributes(['class' => 'channel-form']);
         $this->addElement($this->createCsrfCounterMeasure(Session::getSession()->getId()));
 
         $this->addElement(
@@ -111,6 +114,24 @@ protected function assemble()
         );
 
         if ($this->channelId !== null) {
+            $isInUse = Contact::on($this->db)
+                    ->columns('1')
+                    ->filter(Filter::all(
+                        Filter::equal('default_channel_id', $this->channelId),
+                        Filter::equal('deleted', 'n')
+                    ))
+                    ->count() > 0;
+
+            if (! $isInUse) {
+                $isInUse = RuleEscalationRecipient::on($this->db)
+                        ->columns('1')
+                        ->filter(Filter::all(
+                            Filter::equal('channel_id', $this->channelId),
+                            Filter::equal('deleted', 'n')
+                        ))
+                        ->count() > 0;
+            }
+
             /** @var FormSubmitElement $deleteButton */
             $deleteButton = $this->createElement(
                 'submit',
@@ -118,7 +139,11 @@ protected function assemble()
                 [
                     'label'          => $this->translate('Delete'),
                     'class'          => 'btn-remove',
-                    'formnovalidate' => true
+                    'formnovalidate' => true,
+                    'disabled'       => $isInUse,
+                    'title'          => $isInUse
+                        ? $this->translate('Cannot delete channel, contacts or event rules are using it')
+                        : null
                 ]
             );
 
diff --git a/public/css/form.less b/public/css/form.less
index ca2a24062..c9626b665 100644
--- a/public/css/form.less
+++ b/public/css/form.less
@@ -108,3 +108,11 @@
 .source-form textarea {
   .monospace-font();
 }
+
+.channel-form {
+  .btn-remove:disabled {
+    background: @gray-light;
+    color: @disabled-gray;
+    border-color: transparent;
+  }
+}