NodeAddChildrenAction: new modification action

library/Businessprocess/Modification/NodeAddChildrenAction.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace Icinga\Module\Businessprocess\Modification;
+
+use Icinga\Module\Businessprocess\BpNode;
+use Icinga\Module\Businessprocess\BusinessProcess;
+
+class NodeAddChildrenAction extends NodeAction
+{
+    protected $children = array();
+
+    protected $preserveProperties = array('children');
+
+    /**
+     * @inheritdoc
+     */
+    public function appliesTo(BusinessProcess $bp)
+    {
+        $name = $this->getNodeName();
+
+        if (! $bp->hasNode($name)) {
+            return false;
+        }
+
+        return $bp->getNode($name) instanceof BpNode;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function applyTo(BusinessProcess $bp)
+    {
+        /** @var BpNode $node */
+        $node = $bp->getNode($this->getNodeName());
+        $existing = $node->getChildNames();
+        foreach ($this->children as $name) {
+            if (! in_array($name, $existing)) {
+                $existing[] = $name;
+            }
+        }
+        $node->setChildNames($existing);
+
+        return $this;
+    }
+
+    /**
+     * @param array|string $children
+     * @return $this
+     */
+    public function setChildren($children)
+    {
+        if (is_string($children)) {
+            $children = array($children);
+        }
+        $this->children = $children;
+        return $this;
+    }
+
+    /**
+     * @return array
+     */
+    public function getChildren()
+    {
+        return $this->children;
+    }
+}