Make handling of absolute uris changable through a callback

src/MicrodataDOMElement.php

@@ -94,9 +94,11 @@ class MicrodataDOMElement extends \DOMElement
     /**
      * @see https://www.w3.org/TR/2018/WD-microdata-20180426/#dfn-property-value for details of algorithm
      *
+     * @param callable $absoluteUriHandler
+     *
      * @return $this|string
      */
-    public function getPropertyValue()
+    public function getPropertyValue(callable $absoluteUriHandler = null)
     {
         if ($this->hasAttribute('itemscope')) {
             return $this;
@@ -106,8 +108,6 @@ class MicrodataDOMElement extends \DOMElement
             return $this->getAttribute('content');
         }
 
-        $base = $this->ownerDocument->documentURI;
-
         $value = '';
 
         if (\array_key_exists($this->tagName, self::$tagNameLookup)) {
@@ -115,7 +115,7 @@ class MicrodataDOMElement extends \DOMElement
             $value = $this->getAttribute($attribute);
 
             if (!empty($value) && \in_array($attribute, self::$absoluteAttributes) && !$this->isAbsoluteUri($value)) {
-                $value = $base . $value;
+                $value = $absoluteUriHandler($value, $this->ownerDocument->documentURI);
             }
         }
 

src/MicrodataParser.php

@@ -7,16 +7,31 @@ class MicrodataParser
     /** @var MicrodataDOMDocument */
     protected $dom;
 
+    /**
+     * Handler will be called with $value(non-absolute uri string) and $base(base uri) parameters
+     *
+     * Should return a string value
+     *
+     * @var callable
+     */
+    private $absoluteUriHandler;
+
     /**
      * MicrodataParser constructor.
      *
      * @param MicrodataDOMDocument $dom
+     * @param callable $absoluteUriHandler Can be set later with MicrodataParser::setAbsoluteUriHandler()
+     *
+     * @see MicrodataParser::$absoluteUriHandler
      */
-    public function __construct(MicrodataDOMDocument $dom)
+    public function __construct(MicrodataDOMDocument $dom, callable $absoluteUriHandler = null)
     {
         $dom->registerNodeClass(\DOMElement::class, MicrodataDOMElement::class);
 
         $this->dom = $dom;
+        $this->absoluteUriHandler = $absoluteUriHandler ?: function ($value, $base) {
+            return $base . $value;
+        };
     }
 
     /**
@@ -96,7 +111,7 @@ class MicrodataParser
         $properties = new \stdClass;
 
         foreach ($item->getProperties() as $element) {
-            $value = $element->getPropertyValue();
+            $value = $element->getPropertyValue($this->absoluteUriHandler);
 
             if ($this->isItem($value)) {
                 foreach ($memory as $memory_item) {
@@ -121,6 +136,16 @@ class MicrodataParser
         return $result;
     }
 
+    /**
+     * Set absolute uri handler
+     *
+     * @param callable $handler
+     */
+    public function setAbsoluteUriHandler(callable $handler)
+    {
+        $this->absoluteUriHandler = $handler;
+    }
+
     /**
      * Check if the given parameter is a MicrodataDOMElement and has itemscope attribute
      *