add Twig & refactor poche

inc/Twig/Node/Expression/Array.php

@@ -0,0 +1,86 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Array extends Twig_Node_Expression
+{
+    protected $index;
+
+    public function __construct(array $elements, $lineno)
+    {
+        parent::__construct($elements, array(), $lineno);
+
+        $this->index = -1;
+        foreach ($this->getKeyValuePairs() as $pair) {
+            if ($pair['key'] instanceof Twig_Node_Expression_Constant && ctype_digit((string) $pair['key']->getAttribute('value')) && $pair['key']->getAttribute('value') > $this->index) {
+                $this->index = $pair['key']->getAttribute('value');
+            }
+        }
+    }
+
+    public function getKeyValuePairs()
+    {
+        $pairs = array();
+
+        foreach (array_chunk($this->nodes, 2) as $pair) {
+            $pairs[] = array(
+                'key' => $pair[0],
+                'value' => $pair[1],
+            );
+        }
+
+        return $pairs;
+    }
+
+    public function hasElement(Twig_Node_Expression $key)
+    {
+        foreach ($this->getKeyValuePairs() as $pair) {
+            // we compare the string representation of the keys
+            // to avoid comparing the line numbers which are not relevant here.
+            if ((string) $key == (string) $pair['key']) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function addElement(Twig_Node_Expression $value, Twig_Node_Expression $key = null)
+    {
+        if (null === $key) {
+            $key = new Twig_Node_Expression_Constant(++$this->index, $value->getLine());
+        }
+
+        array_push($this->nodes, $key, $value);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw('array(');
+        $first = true;
+        foreach ($this->getKeyValuePairs() as $pair) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $first = false;
+
+            $compiler
+                ->subcompile($pair['key'])
+                ->raw(' => ')
+                ->subcompile($pair['value'])
+            ;
+        }
+        $compiler->raw(')');
+    }
+}