detected article:* meta-tags, improved authorUrl in twittercards

Author: oscarotero

src/Providers/Html.php

@@ -106,7 +106,7 @@ public function getUrl()
      */
     public function getAuthorName()
     {
-        return $this->bag->get('author') ?: $this->bag->get('contributors');
+        return $this->bag->get('author') ?: $this->bag->get('article:author') ?: $this->bag->get('contributors');
     }
 
     /**
@@ -300,6 +300,10 @@ private function extractMetas(DOMDocument $html)
             if ($meta->hasAttribute('http-equiv')) {
                 $this->bag->set($meta->getAttribute('http-equiv'), $value);
             }
+
+            if ($meta->hasAttribute('property')) {
+                $this->bag->set($meta->getAttribute('property'), $value);
+            }
         }
     }
 

src/Providers/TwitterCards.php

@@ -108,6 +108,18 @@ public function getAuthorName()
         return $this->bag->get('creator');
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getAuthorUrl()
+    {
+        $author = $this->getAuthorName();
+        
+        if (!empty($author)) {
+            return 'https://twitter.com/'.ltrim($author, '@');
+        }
+    }
+
     /**
      * {@inheritdoc}
      */