Merge pull request #122 from muskie9/pull/seoBlogCanonical

UPDATE set canonical in cases where there is category/tag/pagination
dynamic · Sep 12, 2021 · 047045e · 047045e
2 parents ab498b9 + aa0c4d6
commit 047045e
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diff --git a/src/Extension/BlogDataExtension.php b/src/Extension/BlogDataExtension.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Dynamic\Base\Extension;
+
+use SilverStripe\Control\Controller;
+use SilverStripe\Control\Director;
+use SilverStripe\ORM\ArrayList;
+use SilverStripe\ORM\DataExtension;
+use SilverStripe\ORM\PaginatedList;
+
+/**
+ *
+ */
+class BlogDataExtension extends DataExtension
+{
+    /**
+     * @param $tags
+     */
+    public function MetaComponents(&$tags)
+    {
+        $request = Controller::curr()->getRequest();
+        $action = $request->param('Action');
+        $id = $request->param('ID');
+        $var = PaginatedList::create(ArrayList::create())->getPaginationGetVar();
+
+        if (($action && $id) || $request->getVar($var)) {
+            $link = Controller::join_links(Director::absoluteBaseURL(), $this->owner->Link($action), $id);
+
+            $tags['canonical'] = [
+                'attributes' => [
+                    'rel' => 'canonical',
+                    'content' => $link,
+                ],
+            ];
+        }
+    }
+}
diff --git a/src/Extension/BlogPostDataExtension.php b/src/Extension/BlogPostDataExtension.php
@@ -4,11 +4,15 @@
 
 use DNADesign\Elemental\Models\ElementContent;
 use SilverStripe\Blog\Model\BlogPost;
+use SilverStripe\Control\Controller;
+use SilverStripe\Control\Director;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\TextField;
+use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\DataExtension;
 use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\FieldType\DBHTMLText;
+use SilverStripe\ORM\PaginatedList;
 
 /**
  * Class BlogPostDataExtension
@@ -49,6 +53,26 @@ public function updateCMSFields(FieldList $fields)
         $fields->insertBefore('Content', $featured);
     }
 
+    /**
+     * @param $tags
+     */
+    public function MetaComponents(&$tags)
+    {
+        $request = Controller::curr()->getRequest();
+        $vars = $request->getVars();
+
+        if (count(preg_grep('/^commentsstart[0-9]+/', array_keys($vars)))) {
+            $link = Controller::join_links(Director::absoluteBaseURL(), $this->owner->Link());
+
+            $tags['canonical'] = [
+                'attributes' => [
+                    'rel' => 'canonical',
+                    'content' => $link,
+                ],
+            ];
+        }
+    }
+
     /**
      * @return DataList
      */