Add class SummaryNavigationItemRenderer

refs #5600

library/Icinga/Web/Navigation/Renderer/SummaryNavigationItemRenderer.php

@@ -0,0 +1,46 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Web\Navigation\Renderer;
+
+use Icinga\Web\Navigation\Renderer\BadgeNavigationItemRenderer;
+
+/**
+ * Summary badge adding up all badges in the navigation's children that have the same state
+ */
+class SummaryNavigationItemRenderer extends BadgeNavigationItemRenderer
+{
+    /**
+     * The title of each summarized child
+     *
+     * @var array
+     */
+    protected $titles;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCount()
+    {
+        $count = 0;
+        foreach ($this->getItem()->getChildren() as $child) {
+            $renderer = $child->getRenderer();
+            if ($renderer instanceof BadgeNavigationItemRenderer) {
+                if ($renderer->getState() === $this->getState()) {
+                    $this->titles[] = $renderer->getTitle();
+                    $count += $renderer->getCount();
+                }
+            }
+        }
+
+        return $count;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTitle()
+    {
+        return join(', ', $this->titles);
+    }
+}