From 0707d1d7e79f8b304d944153cf63830ed523e673 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@netways.de>
Date: Mon, 17 Dec 2018 14:48:46 +0100
Subject: [PATCH] ProcessChanges: Add new action to move processes/nodes

---
 .../Modification/NodeMoveAction.php           | 125 ++++++++++++++++++
 .../Modification/ProcessChanges.php           |  20 +++
 2 files changed, 145 insertions(+)
 create mode 100644 library/Businessprocess/Modification/NodeMoveAction.php

diff --git a/library/Businessprocess/Modification/NodeMoveAction.php b/library/Businessprocess/Modification/NodeMoveAction.php
new file mode 100644
index 0000000..ebe5aea
--- /dev/null
+++ b/library/Businessprocess/Modification/NodeMoveAction.php
@@ -0,0 +1,125 @@
+<?php
+
+namespace Icinga\Module\Businessprocess\Modification;
+
+use Icinga\Module\Businessprocess\BpConfig;
+use Icinga\Module\Businessprocess\BpNode;
+
+class NodeMoveAction extends NodeAction
+{
+    /**
+     * @var string
+     */
+    protected $parentName;
+
+    /**
+     * @var int
+     */
+    protected $from;
+
+    /**
+     * @var int
+     */
+    protected $to;
+
+    protected $preserveProperties = ['parentName', 'from', 'to'];
+
+    public function setParentName($name)
+    {
+        $this->parentName = $name;
+    }
+
+    public function getParentName()
+    {
+        return $this->parentName;
+    }
+
+    public function setFrom($from)
+    {
+        $this->from = (int) $from;
+    }
+
+    public function getFrom()
+    {
+        return $this->from;
+    }
+
+    public function setTo($to)
+    {
+        $this->to = (int) $to;
+    }
+
+    public function getTo()
+    {
+        return $this->to;
+    }
+
+    public function appliesTo(BpConfig $config)
+    {
+        if (! $config->getMetadata()->isManuallyOrdered()) {
+            return false;
+        }
+
+        $name = $this->getNodeName();
+        if ($this->parentName !== null) {
+            if (! $config->hasBpNode($this->parentName)) {
+                return false;
+            }
+            $parent = $config->getBpNode($this->parentName);
+            if (! $parent->hasChild($name)) {
+                return false;
+            }
+
+            $nodes = $parent->getChildNames();
+            if (! isset($nodes[$this->from]) || $nodes[$this->from] !== $name) {
+                return false;
+            }
+        } else {
+            if (! $config->hasNode($name)) {
+                return false;
+            }
+
+            if ($config->getBpNode($name)->getDisplay() !== $this->getFrom()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function applyTo(BpConfig $config)
+    {
+        $name = $this->getNodeName();
+        if ($this->parentName !== null) {
+            $nodes = $config->getBpNode($this->parentName)->getChildren();
+        } else {
+            $nodes = $config->getRootNodes();
+        }
+
+        $node = $nodes[$name];
+        $nodes = array_merge(
+            array_slice($nodes, 0, $this->from, true),
+            array_slice($nodes, $this->from + 1, null, true)
+        );
+        $nodes = array_merge(
+            array_slice($nodes, 0, $this->to, true),
+            [$name => $node],
+            array_slice($nodes, $this->to, null, true)
+        );
+
+        if ($this->parentName !== null) {
+            $config->getBpNode($this->parentName)->setChildNames(array_keys($nodes));
+        } else {
+            $i = 0;
+            foreach ($nodes as $name => $node) {
+                /** @var BpNode $node */
+                if ($node->getDisplay() > 0) {
+                    $i += 1;
+                    if ($node->getDisplay() !== $i) {
+                        $node->setDisplay($i);
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/library/Businessprocess/Modification/ProcessChanges.php b/library/Businessprocess/Modification/ProcessChanges.php
index 8a9f618..8dc324a 100644
--- a/library/Businessprocess/Modification/ProcessChanges.php
+++ b/library/Businessprocess/Modification/ProcessChanges.php
@@ -120,6 +120,26 @@ class ProcessChanges
         return $this->push($action);
     }
 
+    /**
+     * Move the given node
+     *
+     * @param   Node    $node
+     * @param   int     $from
+     * @param   int     $to
+     * @param   string  $parentName
+     *
+     * @return  $this
+     */
+    public function moveNode(Node $node, $from, $to, $parentName = null)
+    {
+        $action = new NodeMoveAction($node);
+        $action->setParentName($parentName);
+        $action->setFrom($from);
+        $action->setTo($to);
+
+        return $this->push($action);
+    }
+
     /**
      * Apply manual order on the entire bp configuration file
      *