Update to customized version of Twig DeferredExtension, improve Twig 2 compatibility

system/src/Twig/DeferredExtension/DeferredTokenParser.php

@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * This file is part of the rybakit/twig-deferred-extension package.
+ *
+ * (c) Eugene Leonovich <gen.work@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Twig\DeferredExtension;
+
+use Twig\Node\BlockNode;
+use Twig\Node\Node;
+use Twig\Parser;
+use Twig\Token;
+use Twig\TokenParser\AbstractTokenParser;
+use Twig\TokenParser\BlockTokenParser;
+
+final class DeferredTokenParser extends AbstractTokenParser
+{
+    private $blockTokenParser;
+
+    public function setParser(Parser $parser) : void
+    {
+        parent::setParser($parser);
+
+        $this->blockTokenParser = new BlockTokenParser();
+        $this->blockTokenParser->setParser($parser);
+    }
+
+    public function parse(Token $token) : Node
+    {
+        $stream = $this->parser->getStream();
+        $nameToken = $stream->next();
+        $deferredToken = $stream->nextIf(Token::NAME_TYPE, 'deferred');
+        $stream->injectTokens([$nameToken]);
+
+        $node = $this->blockTokenParser->parse($token);
+
+        if ($deferredToken) {
+            $this->replaceBlockNode($nameToken->getValue());
+        }
+
+        return $node;
+    }
+
+    public function getTag() : string
+    {
+        return 'block';
+    }
+
+    private function replaceBlockNode(string $name) : void
+    {
+        $block = $this->parser->getBlock($name)->getNode('0');
+        $this->parser->setBlock($name, $this->createDeferredBlockNode($block));
+    }
+
+    private function createDeferredBlockNode(BlockNode $block) : DeferredBlockNode
+    {
+        $name = $block->getAttribute('name');
+        $deferredBlock = new DeferredBlockNode($name, new Node([]), $block->getTemplateLine());
+
+        foreach ($block as $nodeName => $node) {
+            $deferredBlock->setNode($nodeName, $node);
+        }
+
+        if ($sourceContext = $block->getSourceContext()) {
+            $deferredBlock->setSourceContext($sourceContext);
+        }
+
+        return $deferredBlock;
+    }
+}