moved tab logic to a new class

More of the logic should be moved to this class

Template.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace dokuwiki\template\sprintdoc;
+
+/**
+ * Class Template
+ *
+ * provides additional logic for the sprintdoc template
+ *
+ * @package dokuwiki\template\sprintdoc
+ */
+class Template {
+
+    /**
+     * @var array loaded plugins
+     */
+    protected $plugins = array(
+        'sqlite' => null,
+        'tagging' => null,
+    );
+
+    /**
+     * Get the singleton instance
+     *
+     * @return Template
+     */
+    public static function getInstance() {
+        static $instance = null;
+        if($instance === null) $instance = new Template();
+        return $instance;
+    }
+
+
+    /**
+     * Template constructor.
+     */
+    protected function __construct() {
+        $this->initializePlugins();
+    }
+
+    /**
+     * Load all the plugins we support directly
+     */
+    protected function initializePlugins() {
+        $this->plugins['sqlite'] = plugin_load('helper', 'sqlite');
+        if($this->plugins['sqlite']) {
+            $this->plugins['tagging'] = plugin_load('helper', 'tagging');
+        }
+    }
+
+    /**
+     * Get all the tabs to display
+     *
+     * @return array
+     */
+    public function getMetaBoxTabs() {
+        global $lang;
+        $tabs = array();
+
+        $toc = tpl_toc(true);
+        if($toc) {
+            $tabs[] = array(
+                'id' => 'spr__tab-toc',
+                'label' => $lang['toc'],
+                'tab' => $toc,
+                'count' => null,
+            );
+        }
+
+        if($this->plugins['tagging']) {
+            $tabs[] = array(
+                'id' => 'spr__tab-tags',
+                'label' => tpl_getLang('tab_tags'),
+                'tab' => $this->plugins['tagging']->tpl_tags(false),
+                'count' => null, // FIXME
+            );
+        }
+
+        // fixme add magicmatcher info
+
+        return $tabs;
+    }
+}

tpl/nav-meta-box.php

@@ -1,31 +1,7 @@
 <?php
 if(!defined('DOKU_INC')) die();
-global $lang;
 
-$tabs = array();
-
-$toc = tpl_toc(true);
-if($toc) {
-    $tabs[] = array(
-        'id' => 'spr__tab-toc',
-        'label' => $lang['toc'],
-        'tab' => $toc,
-        'count' => null,
-    );
-}
-
-/** @var helper_plugin_tagging $tags */
-$tags = plugin_load('helper', 'tagging');
-if($tags) {
-    $tabs[] = array(
-        'id' => 'spr__tab-tags',
-        'label' => tpl_getLang('tab_tags'),
-        'tab' => $tags->tpl_tags(false),
-        'count' => null, // FIXME
-    );
-}
-
-// fixme add magicmatcher info
+$tabs = \dokuwiki\template\sprintdoc\Template::getInstance()->getMetaBoxTabs();
 
 ?>
 <div class="tab-container">