FIX: Broken widgets (sidebar)

src/Tasks/BrokenSidebarTask.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace A2nt\CMSNiceties\Tasks;
+
+use Page;
+use SilverStripe\Dev\BuildTask;
+use SilverStripe\Widgets\Model\WidgetArea;
+
+class BrokenWidgetsTask extends BuildTask
+{
+    protected $title = 'Broken Widgets Task';
+    protected $description = 'Broken widgets reset';
+    protected $enabled = true;
+
+    public function run($request)
+    {
+        $pages = Page::get();
+        $wIDs = array_keys($pages->map('ID', 'SideBarID')->toArray());
+
+        // delete orphaned widgets areas
+        $items = WidgetArea::get()->exclude('ID', $wIDs);
+        foreach ($items as $i) {
+            $i->delete();
+        }
+
+        // reset empty widget areas
+        foreach ($pages as $p) {
+            $w = $p->Sidebar();
+            if (!$w->ID) {
+                $p->setField('SideBarID', '0');
+                $p->write();
+
+                continue;
+            }
+
+            $widgets = $w->Widgets();
+
+            if (!$widgets->count()) {
+                $w->delete();
+                $p->setField('SideBarID', '0');
+                $p->write();
+            }
+        }
+
+        die('Done!');
+    }
+}

src/Widgets/WidgetPageExtension.php

@@ -1,10 +1,10 @@
 <?php
 
-
 namespace A2nt\CMSNiceties\Widgets;
 
 use DNADesign\Elemental\Forms\ElementalAreaField;
 use SilverStripe\Forms\FieldList;
+use SilverStripe\Forms\LiteralField;
 use SilverStripe\Widgets\Forms\WidgetAreaEditor;
 use SilverStripe\Widgets\Model\Widget;
 use SilverStripe\Widgets\Model\WidgetArea;
@@ -33,9 +33,10 @@ class WidgetPageExtension extends \SilverStripe\Widgets\Extensions\WidgetPageExt
             $available[get_class($type)] = $type->getCMSTitle();
         }
 
+        $w = $this->owner->Sidebar();
         $tab->push(WidgetAreaField::create(
             'SideBar',
-            $this->owner->Sidebar(),
+            $w,
             $available
         ));
     }
@@ -44,11 +45,14 @@ class WidgetPageExtension extends \SilverStripe\Widgets\Extensions\WidgetPageExt
     {
         parent::onBeforeWrite();
 
-        if (!$this->owner->getField('SideBarID')) {
+        $obj = $this->owner;
+        $w = $obj->SideBar();
+
+        if (!$w->ID || !$obj->getField('SideBarID')) {
             $area = WidgetArea::create();
             $area->write();
 
-            $this->owner->setField('SideBarID', $area->ID);
+            $obj->setField('SideBarID', $area->ID);
         }
     }
 }