From 1414e76d941b45c3c3fc760b7f979b9f7f30b02c Mon Sep 17 00:00:00 2001
From: Dominik Seidel <dominik.seidel@netways.de>
Date: Wed, 20 Nov 2019 15:50:22 +0100
Subject: [PATCH] CLI: Add options --blame and --root-cause

---
 application/clicommands/ProcessCommand.php | 12 ++++++++
 library/Businessprocess/BpNode.php         | 32 ++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/application/clicommands/ProcessCommand.php b/application/clicommands/ProcessCommand.php
index a11a202..33c8936 100644
--- a/application/clicommands/ProcessCommand.php
+++ b/application/clicommands/ProcessCommand.php
@@ -75,6 +75,12 @@ class ProcessCommand extends Command
      *   --state-type <type>     Define which state type to look at. Could be
      *                           either soft or hard, overrides an eventually
      *                           configured default
+     *   --blame                 Show problem details as a tree reduced to the
+     *                           nodes which have the same state as the business
+     *                           process
+     *   --root-cause            Used in combination with --blame. Only shows
+     *                           the path of the nodes which are responsible for
+     *                           the state of the business process
      */
     public function checkAction()
     {
@@ -110,6 +116,12 @@ class ProcessCommand extends Command
         if ($this->params->shift('details')) {
             echo $this->renderProblemTree($node->getProblemTree(), $this->params->shift('colors'));
         }
+        if ($this->params->shift('blame')) {
+            echo $this->renderProblemTree(
+                $node->getProblemTreeBlame($this->params->shift('root-cause')),
+                $this->params->shift('colors')
+            );
+        }
 
         exit($node->getState());
     }
diff --git a/library/Businessprocess/BpNode.php b/library/Businessprocess/BpNode.php
index 1575b34..bc8487e 100644
--- a/library/Businessprocess/BpNode.php
+++ b/library/Businessprocess/BpNode.php
@@ -175,6 +175,38 @@ class BpNode extends Node
         return $tree;
     }
 
+    /**
+     * Get the problem nodes as tree reduced to the nodes which have the same state as the business process
+     *
+     * @param bool $rootCause Reduce nodes to the nodes which are responsible for the state of the business process
+     *
+     * @return array
+     */
+    public function getProblemTreeBlame($rootCause = false)
+    {
+        $tree = [];
+        $nodeState = $this->getState();
+
+        if ($nodeState !== 0) {
+            foreach ($this->getChildren() as $child) {
+                $childState = $rootCause ? $child->getSortingState() : $child->getState();
+                if (($rootCause ? $this->getSortingState() : $nodeState) === $childState) {
+                    $name = $child->getName();
+                    $tree[$name] = [
+                        'children' => [],
+                        'node'     => $child
+                    ];
+                    if ($child instanceof BpNode) {
+                        $tree[$name]['children'] = $child->getProblemTreeBlame($rootCause);
+                    }
+                }
+            }
+        }
+
+        return $tree;
+    }
+
+
     public function isMissing()
     {
         if ($this->missing === null) {