BpNode, process/show: error for missing children...

...and unknown as state

fixes #105

application/controllers/ProcessController.php

@@ -96,8 +96,13 @@ class ProcessController extends Controller
         }
 
         $this->prepareControls($bp, $renderer);
+        $missing = $bp->getMissingChildren();
+        if (! empty($missing)) {
+            $bp->addError(sprintf('There are missing nodes: %s', implode(', ', $missing)));
+        }
         $this->content()->addContent($this->showHints($bp));
         $this->content()->addContent($this->showWarnings($bp));
+        $this->content()->addContent($this->showErrors($bp));
         $this->content()->add($renderer);
         $this->loadActionForm($bp, $node);
         $this->setDynamicAutorefresh();
@@ -264,6 +269,20 @@ class ProcessController extends Controller
         }
     }
 
+    protected function showErrors(BpConfig $bp)
+    {
+        if ($bp->hasWarnings()) {
+            $ul = Element::create('ul', array('class' => 'error'));
+            foreach ($bp->getErrors() as $msg) {
+                $ul->createElement('li')->addContent($msg);
+            }
+
+            return $ul;
+        } else {
+            return null;
+        }
+    }
+
     protected function showHints(BpConfig $bp)
     {
         $ul = Element::create('ul', array('class' => 'error'));

library/Businessprocess/BpConfig.php

@@ -464,6 +464,16 @@ class BpConfig
         return $this->createBp($name)->setMissing();
     }
 
+    public function getMissingChildren()
+    {
+        $missing = array();
+        foreach ($this->getRootNodes() as $root) {
+            $missing += $root->getMissingChildren();
+        }
+
+        return $missing;
+    }
+
     public function createImportedNode($config, $name = null)
     {
         $params = (object) array('configName' => $config);

library/Businessprocess/BpNode.php

@@ -336,6 +336,9 @@ class BpNode extends Node
             $sort_states[] = $child->getSortingState();
             $lastStateChange = max($lastStateChange, $child->getLastStateChange());
             $bp->endLoopDetection($this->name);
+            if ($child instanceof MonitoredNode && $child->isMissing()) {
+                $child->setState(self::ICINGA_UNKNOWN);
+            }
         }
 
         $this->setLastStateChange($lastStateChange);