feat: add ability to reorder menu sets (#24)

README.md

@@ -116,6 +116,24 @@ content._
     <% end_loop %>
 ```
 
+To loop through *all* MenuSets and their items:
+
+	<% loop $MenuSets %>
+		<% loop $MenuItems %>
+			<a href="$Link" class="$LinkingMode">$MenuTitle</a>
+		<% end_loop %>
+	<% end_loop %>
+
+Optionally you can also limit the number of MenuSets and MenuItems that are looped through.
+
+The example below will fetch the top 4 MenuSets (as seen in Menu Management), and the top 5 MenuItems for each:
+
+	<% loop $MenuSets.Limit(4) %>
+		<% loop $MenuItems.Limit(5) %>
+			<a href="$Link" class="$LinkingMode">$MenuTitle</a>
+		<% end_loop %>
+	<% end_loop %>
+
 #### Enabling partial caching
 
 [Partial caching](https://docs.silverstripe.org/en/4/developer_guides/performance/partial_caching/)
@@ -135,6 +153,15 @@ can be enabled with your menu to speed up rendering of your templates.
     <% end_with %>
 ```
 
+### Allow sorting of MenuSets
+
+By default menu sets cannot be sorted, however, you can set your configuration to allow it.
+
+```yaml
+Heyday\MenuManager\MenuSet:
+  allow_sorting: true
+```
+
 
 ### Code guidelines
 

src/MenuAdmin.php

@@ -3,9 +3,11 @@
 namespace Heyday\MenuManager;
 
 use SilverStripe\Admin\ModelAdmin;
+use SilverStripe\Core\Config\Config;
 use SilverStripe\Forms\GridField\GridField;
 use SilverStripe\Forms\GridField\GridFieldAddNewButton;
 use SilverStripe\Forms\GridField\GridFieldImportButton;
+use Symbiote\GridFieldExtensions\GridFieldOrderableRows;
 
 /**
  * Class MenuAdmin
@@ -66,6 +68,14 @@ public function getEditForm($id = null, $fields = null)
             }
         }
 
+        if (Config::inst()->get($this->modelClass, 'allow_sorting')) {
+            $gridFieldName = $this->sanitiseClassName($this->modelClass);
+            $gridField = $form->Fields()->fieldByName($gridFieldName);
+
+            $gridField->getConfig()->addComponent(new GridFieldOrderableRows());
+        }
+
+
         return $form;
     }
 }

src/MenuManagerTemplateProvider.php

@@ -17,7 +17,8 @@ class MenuManagerTemplateProvider implements TemplateGlobalProvider
     public static function get_template_global_variables()
     {
         return [
-            'MenuSet' => 'MenuSet'
+            'MenuSet' => 'MenuSet',
+            'MenuSets' => 'MenuSets'
         ];
     }
 
@@ -30,6 +31,16 @@ public static function MenuSet($name)
         return Injector::inst()->get(self::class)->findMenuSetByName($name);
     }
 
+    /**
+     * @param $name
+     * @return MenuSet|null
+     */
+   public static function MenuSets()
+   {
+       return MenuSet::get();
+   }
+
+
     /**
      * Find a MenuSet by name
      *

src/MenuSet.php

@@ -25,7 +25,8 @@ class MenuSet extends DataObject implements PermissionProvider
 
     private static $db = [
         'Name' => 'Varchar(255)',
-        'Description' => 'Text'
+        'Description' => 'Text',
+        'Sort' => 'Int'
     ];
 
     private static $has_many = [
@@ -41,6 +42,8 @@ class MenuSet extends DataObject implements PermissionProvider
         'Description'
     ];
 
+    private static $default_sort = 'Sort ASC';
+
     /**
      * @return array
      */