IcingaObject: prepare command object access

library/Director/Objects/IcingaHost.php

@@ -66,6 +66,20 @@ class IcingaHost extends IcingaObject
         return $properties;
     }
 
+    public function getCheckCommand()
+    {
+        $id = $this->getResolvedProperty('check_command_id');
+        return IcingaCommand::loadWithAutoIncId(
+            $id,
+            $this->getConnection()
+        );
+    }
+
+    public function hasCheckCommand()
+    {
+        return $this->getResolvedProperty('check_command_id') !== null;
+    }
+
     protected function renderCheck_command_id()
     {
         return $this->renderCommandProperty($this->check_command_id);

library/Director/Objects/IcingaObject.php

@@ -199,6 +199,16 @@ abstract class IcingaObject extends DbObject implements IcingaConfigRenderer
         return $this;
     }
 
+    public function getResolvedProperty($key)
+    {
+        $properties = $this->getResolvedProperties();
+        if (property_exists($properties, $key)) {
+            return $properties->$key;
+        }
+
+        return null;
+    }
+
     public function getResolvedProperties()
     {
         return $this->getResolved('Properties');
@@ -685,6 +695,11 @@ return '';
         return substr($this->getType(), -5) === 'Group';
     }
 
+    public function hasCheckCommand()
+    {
+        return false;
+    }
+
     protected function getType()
     {
         if ($this->type === null) {