1 files changed, 89 insertions, 1 deletions
diff --git a/src/Readability.php b/src/Readability.php
index d4c2181..a3c3cc2 100644
--- a/src/Readability.php
+++ b/src/Readability.php
@@ -4,7 +4,95 @@ namespace andreskrey\Readability;
 
 class Readability implements ReadabilityInterface
 {
-    private $score = 0;
+    protected $score = 0;
+
+    protected $node;
+
+    private $regexps = [
+        'positive' => '/article|body|content|entry|hentry|h-entry|main|page|pagination|post|text|blog|story/i',
+        'negative' => '/hidden|^hid$| hid$| hid |^hid |banner|combx|comment|com-|contact|foot|footer|footnote|masthead|media|meta|modal|outbrain|promo|related|scroll|share|shoutbox|sidebar|skyscraper|sponsor|shopping|tags|tool|widget/i',
+    ];
+
+    /**
+     * @param DOMElement $node
+     */
+    public function __construct($node)
+    {
+        $this->node = $node;
+    }
+
+    public function initializeNode()
+    {
+        switch ($this->node->getTagName()) {
+            case 'div':
+                $this->score += 5;
+                break;
+
+            case 'pre':
+            case 'td':
+            case 'blockquote':
+                $this->score += 3;
+                break;
+
+            case 'address':
+            case 'ol':
+            case 'ul':
+            case 'dl':
+            case 'dd':
+            case 'dt':
+            case 'li':
+            case 'form':
+                $this->score -= 3;
+                break;
+
+            case 'h1':
+            case 'h2':
+            case 'h3':
+            case 'h4':
+            case 'h5':
+            case 'h6':
+            case 'th':
+                $this->score -= 5;
+                break;
+        }
+
+        $this->score += $this->getClassWeight();
+
+        return $this;
+    }
+
+    public function getClassWeight()
+    {
+        // if(!Config::FLAG_WEIGHT_CLASSES) return 0;
+
+        $weight = 0;
+
+        // Look for a special classname
+        $class = $this->node->getAttribute('class');
+        if (trim($class)) {
+            if (preg_match($this->regexps['negative'], $class)) {
+                $weight -= 25;
+            }
+
+            if (preg_match($this->regexps['positive'], $class)) {
+                $weight += 25;
+            }
+        }
+
+        // Look for a special ID
+        $id = $this->node->getAttribute('class');
+        if (trim($id)) {
+            if (preg_match($this->regexps['negative'], $id)) {
+                $weight -= 25;
+            }
+
+            if (preg_match($this->regexps['positive'], $id)) {
+                $weight += 25;
+            }
+        }
+
+        return $weight;
+    }
 
     public function getScore()
     {