From dae2ba0e5f3480cf029b99fbf427e8e280a8c431 Mon Sep 17 00:00:00 2001
From: Florian Thoma <florian.thoma@innoweb.com.au>
Date: Wed, 3 May 2017 11:44:37 +1000
Subject: [PATCH] add meta links for previous and next pages in pagination

---
 src/Model/BlogController.php | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/src/Model/BlogController.php b/src/Model/BlogController.php
index 47e203a..445be05 100644
--- a/src/Model/BlogController.php
+++ b/src/Model/BlogController.php
@@ -3,6 +3,7 @@
 namespace SilverStripe\Blog\Model;
 
 use PageController;
+use SilverStripe\Control\Director;
 use SilverStripe\Control\RSS\RSSFeed;
 use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\FieldType\DBDatetime;
@@ -432,6 +433,39 @@ class BlogController extends PageController
         return $posts;
     }
 
+
+    /**
+     * Returns the absolute link to the next page for use in the page meta tags. This helps search engines
+     * find the pagination and index all pages properly.
+     *
+     * @example "<% if $PaginationAbsoluteNextLink %><link rel="next" href="$PaginationAbsoluteNextLink"><% end_if %>"
+     *
+     * @return string
+     */
+    public function PaginationAbsoluteNextLink()
+    {
+        $posts = $this->PaginatedList();
+        if ($posts->NotLastPage()) {
+            return Director::absoluteURL($posts->NextLink());
+        }
+    }
+
+     /**
+     * Returns the absolute link to the previous page for use in the page meta tags. This helps search engines
+     * find the pagination and index all pages properly.
+     *
+     * @example "<% if $PaginationAbsolutePrevLink %><link rel="prev" href="$PaginationAbsolutePrevLink"><% end_if %>"
+     *
+     * @return string
+     */
+    public function PaginationAbsolutePrevLink()
+    {
+        $posts = $this->PaginatedList();
+        if ($posts->NotFirstPage()) {
+            return Director::absoluteURL($posts->PrevLink());
+        }
+    }
+
     /**
      * Displays an RSS feed of blog posts.
      *