TemplatesTable: allow to filter by usage

fixes #1339

doc/82-Changelog.md

@@ -12,6 +12,8 @@ master (will be 1.6.0)
 
 ### User Interface
 * FIX: link startup log warning even for non-standard package names (#1633)
+* FEATURE: allow to filter templates by usage (#1339)
+* FEATURE: allow to show SQL used for template tables
 
 ### Import and Sync
 * FEATURE: new Property Modifier allows to extract specific Array values (#473)

library/Director/Web/Controller/ObjectsController.php

@@ -181,7 +181,6 @@ abstract class ObjectsController extends ActionController
      * Loads the TemplatesTable or the TemplateTreeRenderer
      *
      * Passing render=tree switches to the tree view.
-     * @throws \Icinga\Exception\ConfigurationError
      * @throws \Icinga\Exception\Http\HttpNotFoundException
      * @throws \Icinga\Security\SecurityException
      * @throws NotFoundError
@@ -210,6 +209,8 @@ abstract class ObjectsController extends ActionController
             $table = TemplatesTable::create($shortType, $this->db());
             $this->eventuallyFilterCommand($table);
             $table->renderTo($this);
+            (new AdditionalTableActions($this->getAuth(), $this->url(), $table))
+                ->appendTo($this->actions());
         }
     }
 
@@ -223,7 +224,6 @@ abstract class ObjectsController extends ActionController
     }
 
     /**
-     * @throws \Icinga\Exception\ConfigurationError
      * @throws \Icinga\Exception\Http\HttpNotFoundException
      * @throws \Icinga\Security\SecurityException
      * @throws NotFoundError

library/Director/Web/Table/TemplatesTable.php

@@ -16,7 +16,7 @@ use dipl\Web\Table\ZfQueryBasedTable;
 use dipl\Web\Url;
 use Zend_Db_Select as ZfSelect;
 
-class TemplatesTable extends ZfQueryBasedTable
+class TemplatesTable extends ZfQueryBasedTable implements FilterableByUsage
 {
     use MultiSelect;
 
@@ -96,6 +96,24 @@ class TemplatesTable extends ZfQueryBasedTable
         return $this;
     }
 
+    public function showOnlyUsed()
+    {
+        $type = $this->getType();
+        $this->getQuery()->where(
+            "(EXISTS (SELECT ${type}_id FROM icinga_${type}_inheritance"
+            . " WHERE parent_${type}_id = o.id))"
+        );
+    }
+
+    public function showOnlyUnUsed()
+    {
+        $type = $this->getType();
+        $this->getQuery()->where(
+            "(NOT EXISTS (SELECT ${type}_id FROM icinga_${type}_inheritance"
+            . " WHERE parent_${type}_id = o.id))"
+        );
+    }
+
     protected function applyRestrictions(ZfSelect $query)
     {
         $auth = Auth::getInstance();