monitoring/commands: Add `ToggleFeatureCommandForm'

`ToggleFeatureCommandForm' should be the base class for forms enabling/disabling features of an Icinga instance.

refs #6593

modules/monitoring/application/forms/Command/Instance/ToggleFeatureCommandForm.php

@@ -0,0 +1,90 @@
+<?php
+// {{{ICINGA_LICENSE_HEADER}}}
+// {{{ICINGA_LICENSE_HEADER}}}
+
+namespace Icinga\Module\Monitoring\Form\Command\Instance;
+
+use Icinga\Web\Notification;
+use Icinga\Web\Request;
+
+/**
+ * Base class for forms enabling/disabling features of an Icinga instance
+ */
+abstract class ToggleFeatureCommandForm extends InstanceCommandForm
+{
+    /**
+     * @var string
+     */
+    protected $feature;
+
+    /**
+     * @var string
+     */
+    protected $label;
+
+    /**
+     * Get the command which is to be sent to an Icinga instance
+     *
+     * @return \Icinga\Module\Monitoring\Command\IcingaCommand
+     */
+    abstract public function getCommand();
+
+    /**
+     * Set the feature the form enables or disables
+     *
+     * @param   string $feature
+     * @param   string $label
+     *
+     * @return  $this
+     */
+    public function setFeature($feature, $label)
+    {
+        $this->feature = $feature;
+        $this->label = $label;
+        return $this;
+    }
+
+    /**
+     * (non-PHPDoc)
+     * @see \Icinga\Web\Form::createElements() For the method documentation.
+     */
+    public function createElements(array $formData = array())
+    {
+        if (isset($formData[$this->feature])) {
+            $enabled = (bool) $formData[$this->feature];
+        } else {
+            $enabled = (bool) $this->backend
+                ->select()
+                ->from(
+                    'programstatus',
+                    array($this->feature)
+                )
+                ->getQuery()
+                ->fetchRow();
+        }
+        return array(
+            $this->createElement(
+                'checkbox',
+                $this->feature,
+                array(
+                    'label'         => $this->label,
+                    'autosubmit'    => $this->inline,
+                    'value'         => $enabled
+                )
+            )
+        );
+    }
+
+    /**
+     * (non-PHPDoc)
+     * @see \Icinga\Web\Form::createElements() For the method documentation.
+     */
+    public function onSuccess(Request $request)
+    {
+        $toggleFeature = $this->getCommand();
+        (bool) $request->getParam($this->feature) === true ? $toggleFeature->enable() : $toggleFeature->disable();
+        $this->getTransport($request)->send($toggleFeature);
+        Notification::success(mt('monitoring', 'Command sent'));
+        return true;
+    }
+}