introduce a MenuInterface

this helps tieing together the "normal" menus and the MobileMenu and
makes them both implement a getItems() method.

inc/Menu/AbstractMenu.php

@@ -11,7 +11,7 @@ use dokuwiki\Menu\Item\AbstractItem;
  * It contains convenience functions to display the menu in HTML, but template authors can also
  * just accesst the items via getItems() and create the HTML as however they see fit.
  */
-abstract class AbstractMenu {
+abstract class AbstractMenu implements MenuInterface {
 
     /** @var string[] list of Item classes to load */
     protected $types = array();

inc/Menu/MenuInterface.php

+<?php
+
+namespace dokuwiki\Menu;
+
+use dokuwiki\Menu\Item\AbstractItem;
+
+/**
+ * Interface MenuInterface
+ *
+ * Defines what a Menu provides
+ */
+Interface MenuInterface {
+
+    /**
+     * Get the list of action items in this menu
+     *
+     * @return AbstractItem[]
+     */
+    public function getItems();
+}

inc/Menu/MobileMenu.php

@@ -11,14 +11,14 @@ use dokuwiki\Menu\Item\AbstractItem;
  * menus. This is a meta menu, aggregating the items from the other menus and offering a combined
  * view. The idea is to use this on mobile devices, thus the context is fixed to CTX_MOBILE
  */
-class MobileMenu {
+class MobileMenu implements MenuInterface {
 
     /**
-     * Returns all items grouped
+     * Returns all items grouped by view
      *
      * @return AbstractItem[][]
      */
-    public function getItems() {
+    public function getGroupedItems() {
         $pagemenu = new PageMenu(AbstractItem::CTX_MOBILE);
         $sitemenu = new SiteMenu(AbstractItem::CTX_MOBILE);
         $usermenu = new UserMenu(AbstractItem::CTX_MOBILE);
@@ -30,6 +30,18 @@ class MobileMenu {
         );
     }
 
+    /**
+     * Get all items in a flat array
+     *
+     * This returns the same format as AbstractMenu::getItems()
+     *
+     * @return AbstractItem[]
+     */
+    public function getItems() {
+        $menu = $this->getGroupedItems();
+        return call_user_func_array('array_merge', array_values($menu));
+    }
+
     /**
      * Print a dropdown menu with all DokuWiki actions
      *
@@ -57,7 +69,7 @@ class MobileMenu {
         $html .= '<select name="do" class="edit quickselect" title="' . $lang['tools'] . '">';
         $html .= '<option value="">' . $empty . '</option>';
 
-        foreach($this->getItems() as $tools => $items) {
+        foreach($this->getGroupedItems() as $tools => $items) {
             $html .= '<optgroup label="' . $lang[$tools . '_tools'] . '">';
             foreach($items as $item) {
                 $params = $item->getParams();