TemplatesTable: new generic base table

library/Director/Web/Table/TemplatesTable.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace Icinga\Module\Director\Web\Table;
+
+use Icinga\Module\Director\Db;
+use ipl\Html\Html;
+use ipl\Html\Icon;
+use ipl\Html\Link;
+use ipl\Web\Url;
+
+class TemplatesTable extends QueryBasedTable
+{
+    protected $searchColumns = ['o.object_name'];
+
+    private $type;
+
+    public static function create($type, Db $db)
+    {
+        $table = new static($db);
+        $table->type = strtolower($type);
+        return $table;
+    }
+
+    public function getType()
+    {
+        return $this->type;
+    }
+
+    public function getColumnsToBeRendered()
+    {
+        return ['Template name'];
+    }
+
+    public function renderRow($row)
+    {
+        $type = $this->getType();
+        $caption = $row->is_used === 'y'
+            ? $row->object_name
+            : [
+                $row->object_name,
+                Html::tag(
+                    'span',
+                    ['style' => 'font-style: italic'],
+                    $this->translate(' - not in use -')
+                )
+            ];
+
+        $url = Url::fromPath("director/${type}template/usage", [
+            'name' => $row->object_name
+        ]);
+
+        return $this::tr([
+            $this::td(new Link($caption, $url)),
+            $this::td(new Link(new Icon('plus'), $url))
+        ]);
+    }
+
+    protected function prepareQuery()
+    {
+        $type = $this->getType();
+        $used = "CASE WHEN EXISTS(SELECT 1 FROM icinga_${type}_inheritance oi"
+            . " WHERE oi.parent_${type}_id = o.id) THEN 'y' ELSE 'n' END";
+
+        $columns = [
+            'object_name' => 'o.object_name',
+            'id'      => 'o.id',
+            'is_used' => $used,
+        ];
+        $query = $this->db()->select()->from(
+            ['o' => "icinga_${type}"],
+            $columns
+        )->where(
+            "o.object_type = 'template'"
+        )->order('o.object_name');
+
+        return $query;
+    }
+}