Add ipl-form compatible implementation of the state override element

library/Businessprocess/Web/Form/Element/IplStateOverrides.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace Icinga\Module\Businessprocess\Web\Form\Element;
+
+use ipl\Html\Attributes;
+use ipl\Html\FormElement\FieldsetElement;
+
+class IplStateOverrides extends FieldsetElement
+{
+    /** @var array */
+    protected $options = [];
+
+    /**
+     * Set the options show
+     *
+     * @param array $options
+     *
+     * @return $this
+     */
+    public function setOptions(array $options): self
+    {
+        $this->options = $options;
+
+        return $this;
+    }
+
+    /**
+     * Get the options to show
+     *
+     * @return array
+     */
+    public function getOptions(): array
+    {
+        return $this->options;
+    }
+
+    public function getValues()
+    {
+        $cleanedValue = parent::getValues();
+
+        if (! empty($cleanedValue)) {
+            foreach ($cleanedValue as $from => $to) {
+                if ((int) $from === (int) $to) {
+                    unset($cleanedValue[$from]);
+                }
+            }
+        }
+
+        return $cleanedValue;
+    }
+
+    protected function assemble()
+    {
+        $states = $this->getOptions();
+        foreach ($states as $state => $label) {
+            if ($state === 0) {
+                continue;
+            }
+
+            $this->addElement('select', $state, [
+                'label' => $label,
+                'value' => $state,
+                'options' => [$state => $this->translate('Keep actual state')] + $states
+            ]);
+        }
+    }
+
+    protected function registerAttributeCallbacks(Attributes $attributes)
+    {
+        parent::registerAttributeCallbacks($attributes);
+
+        $this->getAttributes()
+            ->registerAttributeCallback('options', null, [$this, 'setOptions']);
+    }
+}