start a restructure

Structural/Composite/Form.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace DesignPatterns\Composite;
+
+/**
+ * The composite node MUST extend the component contract. This is mandatory for building
+ * a tree of components.
+ */
+class Form extends FormElement
+{
+    /**
+     * @var array|FormElement[]
+     */
+    protected $elements;
+
+    /**
+     * runs through all elements and calls render() on them, then returns the complete representation
+     * of the form
+     *
+     * from the outside, one will not see this and the form will act like a single object instance
+     *
+     * @param int $indent
+     *
+     * @return string
+     */
+    public function render($indent = 0)
+    {
+        $formCode = '';
+
+        foreach ($this->elements as $element) {
+            $formCode .= $element->render($indent + 1) . PHP_EOL;
+        }
+
+        return $formCode;
+    }
+
+    /**
+     * @param FormElement $element
+     */
+    public function addElement(FormElement $element)
+    {
+        $this->elements[] = $element;
+    }
+}