1 files changed, 22 insertions, 0 deletions
diff --git a/lib/classes/htmlpurifier/HTMLPurifier_Injector_ClassifyLinks.php b/lib/classes/htmlpurifier/HTMLPurifier_Injector_ClassifyLinks.php
new file mode 100644
index 0000000..4096bc8
--- /dev/null
+++ b/lib/classes/htmlpurifier/HTMLPurifier_Injector_ClassifyLinks.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Classify links as internal or external and set the class attribute 
+ * accordingly.
+ */
+class HTMLPurifier_Injector_ClassifyLinks extends HTMLPurifier_Injector
+{
+    public $name = 'ClassifyLinks';
+    public $needed = ['a' => ['href', 'class', 'target']];
+
+    public function handleElement(&$token)
+    {
+        if ($token->name === 'a' && isset($token->attr['href'])) {
+            $is_link_intern = isLinkIntern($token->attr['href']);
+            $token->attr['class'] = $is_link_intern ? 'link-intern' : 'link-extern';
+            if (!$is_link_intern) {
+                $token->attr['target'] = '_blank';
+            }
+        }
+    }
+}