ServicesetController: Add hosts view to serviceSets

So you can see and access hosts the serviceset is added to.

refs #12891

application/controllers/ServicesetController.php

@@ -24,6 +24,11 @@ class ServicesetController extends ObjectController
                 'urlParams' => array('name' => $this->object->object_name),
                 'label'     => 'Services'
             ));
+            $tabs->add('hosts', array(
+                'url'       => 'director/serviceset/hosts',
+                'urlParams' => array('name' => $this->object->object_name),
+                'label'     => 'Hosts'
+            ));
         }
     }
 
@@ -74,6 +79,26 @@ class ServicesetController extends ObjectController
         $this->setViewScript('objects/table');
     }
 
+    public function hostsAction()
+    {
+        $db = $this->db();
+        $set = $this->object;
+
+        $this->view->stayHere = true;
+
+        $this->getTabs()->activate('hosts');
+        $this->view->title = sprintf(
+            $this->translate('Hosts using this set: %s'),
+            $set->object_name
+        );
+
+        $this->view->table = $table = $this->loadTable('IcingaServiceSetHost')
+            ->setServiceSet($set)
+            ->setConnection($db);
+
+        $this->setViewScript('objects/table');
+    }
+
     protected function loadObject()
     {
         if ($this->object === null) {

application/tables/IcingaServiceSetHostTable.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace Icinga\Module\Director\Tables;
+
+use Icinga\Module\Director\Objects\IcingaServiceSet;
+use Icinga\Module\Director\Web\Table\QuickTable;
+
+class IcingaServiceSetHostTable extends QuickTable
+{
+    protected $set;
+
+    protected $searchColumns = array(
+        'host',
+    );
+
+    public function getColumns()
+    {
+        return array(
+            'id'          => 'h.id',
+            'host'        => 'h.object_name',
+            'object_type' => 'h.object_type',
+        );
+    }
+
+    public function setServiceSet(IcingaServiceSet $set)
+    {
+        $this->set = $set;
+        return $this;
+    }
+
+    protected function getActionUrl($row)
+    {
+        $params = array(
+            'name' => $row->host
+        );
+    
+        return $this->url('director/host/services', $params);
+    }
+
+    public function getTitles()
+    {
+        $view = $this->view();
+        return array(
+            'host' => $view->translate('Hostname'),
+        );
+    }
+
+    public function getUnfilteredQuery()
+    {
+        return $this->db()->select()->from(
+            array('h' => 'icinga_host'),
+            array()
+        )->joinLeft(
+            array('ssh' => 'icinga_service_set'),
+            'ssh.host_id = h.id',
+            array()
+        )->joinLeft(
+            array('ssih' => 'icinga_service_set_inheritance'),
+            'ssih.service_set_id = ssh.id',
+            array()
+        )->order('h.object_name');
+    }
+
+    public function getBaseQuery()
+    {
+        return $this->getUnfilteredQuery()->where(
+            'ssih.parent_service_set_id = ?',
+            $this->set->id
+        );
+    }
+}