Add `setmembers` summyary line to TemplateUsageTable

`'setmembers' => $this->getSummaryLine('object', 'o.service_set_id IS NOT NULL AND o.host_id IS NOT NULL'),` is added to TemplateUsageTable
and `objects` is set to ` $this->getSummaryLine('object', 'o.service_set_id IS NULL')`. Subsequently, ObjectTableSetMembers
is added which is used in `setmembersAction` in `TemplateController`. `ObjectTableSetMembers` uses service set name or service name
as search columns.

library/Director/Web/Controller/TemplateController.php

@@ -11,6 +11,7 @@ use Icinga\Module\Director\Objects\IcingaObject;
 use Icinga\Module\Director\Web\Controller\Extension\DirectorDb;
 use Icinga\Module\Director\Web\Table\ApplyRulesTable;
 use Icinga\Module\Director\Web\Table\ObjectsTable;
+use Icinga\Module\Director\Web\Table\ObjectsTableSetMembers;
 use Icinga\Module\Director\Web\Table\TemplatesTable;
 use Icinga\Module\Director\Web\Table\TemplateUsageTable;
 use Icinga\Module\Director\Web\Tabs\ObjectTabs;
@@ -47,6 +48,25 @@ abstract class TemplateController extends CompatController
             ->renderTo($this);
     }
 
+    public function setmembersAction()
+    {
+        $template = $this->requireTemplate();
+        $plural = $this->getTranslatedPluralType();
+        $this
+            ->addSingleTab($plural)
+            ->setAutorefreshInterval(10)
+            ->addTitle(
+                $this->translate('%s in service sets based on %s'),
+                $plural,
+                $template->getObjectName()
+            )->addBackToUsageLink($template);
+
+        ObjectsTableSetMembers::create($this->getType(), $this->db(), $this->Auth())
+            ->setBaseObjectUrl($this->getBaseObjectUrl())
+            ->filterTemplate($template, $this->getInheritance())
+            ->renderTo($this);
+    }
+
     public function applyrulesAction()
     {
         $type = $this->getType();

library/Director/Web/Table/ObjectsTableSetMembers.php

@@ -0,0 +1,155 @@
+<?php
+
+namespace Icinga\Module\Director\Web\Table;
+
+use Icinga\Authentication\Auth;
+use Icinga\Module\Director\Db;
+use gipfl\IcingaWeb2\Link;
+use gipfl\IcingaWeb2\Table\ZfQueryBasedTable;
+use gipfl\IcingaWeb2\Url;
+use Icinga\Module\Director\Db\IcingaObjectFilterHelper;
+use Icinga\Module\Director\Objects\IcingaObject;
+use Icinga\Module\Director\Restriction\FilterByNameRestriction;
+
+class ObjectsTableSetMembers extends ZfQueryBasedTable
+{
+    use TableWithBranchSupport;
+
+    protected $searchColumns = [
+        'os.object_name',
+        'o.object_name',
+    ];
+
+    private $type;
+
+    /** @var IcingaObject */
+    protected $dummyObject;
+
+    protected $baseObjectUrl;
+
+    /** @var Auth */
+    private $auth;
+
+    public static function create($type, Db $db, Auth $auth)
+    {
+        $table = new static($db);
+        $table->type = $type;
+        $table->auth = $auth;
+        return $table;
+    }
+
+    public function getType()
+    {
+        return $this->type;
+    }
+
+    public function getColumnsToBeRendered()
+    {
+        return [
+            'os.object_name' => 'Service Set',
+            'o.object_name'  => 'Service Name'
+        ];
+    }
+
+    public function setBaseObjectUrl($url)
+    {
+        $this->baseObjectUrl = $url;
+
+        return $this;
+    }
+
+    /**
+     * Should be triggered from renderRow, still unused.
+     *
+     * @param IcingaObject $template
+     * @param string $inheritance
+     * @return $this
+     * @throws \Icinga\Exception\ProgrammingError
+     */
+    public function filterTemplate(
+        IcingaObject $template,
+        $inheritance = IcingaObjectFilterHelper::INHERIT_DIRECT
+    ) {
+        IcingaObjectFilterHelper::filterByTemplate(
+            $this->getQuery(),
+            $template,
+            'o',
+            $inheritance
+        );
+
+        return $this;
+    }
+
+
+    public function renderRow($row)
+    {
+        $url = Url::fromPath('director/service/edit', [
+            'name' => $row->object_name,
+            'id'   => $row->id,
+        ]);
+
+        return static::tr([
+            static::td([
+                Link::create($row->service_set, $url),
+            ]),
+            static::td($row->object_name),
+        ]);
+    }
+
+    /**
+     * @return IcingaObject
+     */
+    protected function getDummyObject()
+    {
+        if ($this->dummyObject === null) {
+            $type = $this->type;
+            $this->dummyObject = IcingaObject::createByType($type);
+        }
+        return $this->dummyObject;
+    }
+
+    protected function prepareQuery()
+    {
+        $table = $this->getDummyObject()->getTableName();
+        $type = $this->getType();
+
+        $columns = [
+            'id'             => 'o.id',
+            'service_set'    => 'os.object_name',
+            'object_name'    => 'o.object_name',
+            'object_type'    => 'os.object_type',
+            'assign_filter'  => 'os.assign_filter',
+            'description'    => 'os.description',
+        ];
+
+        $query = $this->db()->select()->from(
+            ['o' => $table],
+            $columns
+        )->joinLeft(
+            ['os' => "icinga_{$type}_set"],
+            "o.{$type}_set_id = os.id",
+            []
+        )->where('o.host_id IS NULL');
+
+        $nameFilter = new FilterByNameRestriction(
+            $this->connection(),
+            $this->auth,
+            "{$type}_set"
+        );
+        $nameFilter->applyToQuery($query, 'os');
+
+        $query
+            ->where('o.object_type = ?', 'object')
+            ->order('os.object_name');
+
+        return $query;
+    }
+
+    /**
+     * @return Db
+     */
+    public function connection()
+    {
+        return parent::connection();
+    }
+}

library/Director/Web/Table/ServiceTemplateUsageTable.php

@@ -10,7 +10,7 @@ class ServiceTemplateUsageTable extends TemplateUsageTable
             'templates'  => $this->translate('Templates'),
             'objects'    => $this->translate('Objects'),
             'applyrules' => $this->translate('Apply Rules'),
-            // 'setmembers' => $this->translate('Set Members'),
+            'setmembers' => $this->translate('Set Members'),
         ];
     }
 
@@ -18,10 +18,10 @@ class ServiceTemplateUsageTable extends TemplateUsageTable
     {
         return [
             'templates'  => $this->getSummaryLine('template'),
-            'objects'    => $this->getSummaryLine('object'),
+            'objects'    => $this->getSummaryLine('object', 'o.service_set_id IS NULL AND o.host_id IS NOT NULL'),
             'applyrules' => $this->getSummaryLine('apply', 'o.service_set_id IS NULL'),
             // TODO: re-enable
-            // 'setmembers' => $this->getSummaryLine('apply', 'o.service_set_id IS NOT NULL'),
+            'setmembers' => $this->getSummaryLine('object', 'o.service_set_id IS NOT NULL'),
         ];
     }
 }