From 45e26c0936c15bc53dd903cc646b7182afd99441 Mon Sep 17 00:00:00 2001
From: Andy Miller <rhuk@mac.com>
Date: Fri, 5 Dec 2014 08:51:48 -0700
Subject: [PATCH] refactored page prev/next/adjacent so they work!

---
 system/src/Grav/Common/Page/Page.php | 36 +++++-----------------------
 1 file changed, 6 insertions(+), 30 deletions(-)

diff --git a/system/src/Grav/Common/Page/Page.php b/system/src/Grav/Common/Page/Page.php
index 7f9b4bb26..862b1f6e6 100644
--- a/system/src/Grav/Common/Page/Page.php
+++ b/system/src/Grav/Common/Page/Page.php
@@ -1186,15 +1186,8 @@ class Page
      */
     public function isFirst()
     {
-        /** @var Pages $pages */
-        $pages = self::$grav['pages'];
-        $parent = $pages->get($this->parent);
-
-        if ($this->path() == array_values($parent->items)[0]) {
-            return true;
-        } else {
-            return false;
-        }
+        $collection = $this->parent()->collection();
+        return $collection->isFirst($this->path());
     }
 
     /**
@@ -1204,15 +1197,8 @@ class Page
      */
     public function isLast()
     {
-        /** @var Pages $pages */
-        $pages = self::$grav['pages'];
-        $parent = $pages->get($this->parent);
-
-        if ($this->path() == array_values($parent->items)[count($parent->items)-1]) {
-            return true;
-        } else {
-            return false;
-        }
+        $collection = $this->parent()->collection();
+        return $collection->isLast($this->path());
     }
 
     /**
@@ -1243,18 +1229,8 @@ class Page
      */
     public function adjacentSibling($direction = 1)
     {
-        /** @var Pages $pages */
-        $pages = self::$grav['pages'];
-        $parent = $this->parent();
-        $children = $parent->children();
-
-        $adjacent = $children->adjacentSibling($this->path(), $direction);
-
-        if (!$adjacent) {
-            return null;
-        }
-
-        return $adjacent;
+        $collection = $this->parent()->collection();
+        return $collection->adjacentSibling($this->path(), $direction);
     }
 
     /**