Merge branch 'prev-next-button' of https://github.com/shubhamosmosys/BookStack into shubhamosmosys-prev-next-button

app/Entities/Models/Page.php

@@ -138,4 +138,13 @@ class Page extends BookChild
         $refreshed->html = (new PageContent($refreshed))->render();
         return $refreshed;
     }
+    /**
+     * Get the parent chapter ID.
+     */
+    public function getParentChapter()
+    {
+        $chapterId = $this->chapter()->visible()
+        ->get('id');
+        return $chapterId;
+    }
 }