Refactor getFirstPage

libs/Tree/Entry.php

@@ -87,7 +87,7 @@ abstract class Entry
     }
 
     /**
-     * @return Content
+     * @return Content|false
      */
     public function getFirstPage()
     {
@@ -95,7 +95,10 @@ abstract class Entry
             return $this->first_page;
         }
 
-        if ($this instanceof Directory) {
+        if (!$this instanceof Directory) {
+            return false;
+        }
+
         foreach ($this->value as $node) {
             if ($node instanceof Content) {
                 if (!count($node->getParents()) && $node->title == 'index') {
@@ -107,13 +110,14 @@ abstract class Entry
                 return $node;
             }
         }
+
         foreach ($this->value as $node) {
             if ($node instanceof Directory && $page = $node->getFirstPage()) {
                 $this->first_page = $page;
                 return $page;
             }
         }
-        }
+
         return false;
     }