diff options
Diffstat (limited to 'vendor/nikic/php-parser/lib/PhpParser/JsonDecoder.php')
-rw-r--r-- | vendor/nikic/php-parser/lib/PhpParser/JsonDecoder.php | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/vendor/nikic/php-parser/lib/PhpParser/JsonDecoder.php b/vendor/nikic/php-parser/lib/PhpParser/JsonDecoder.php new file mode 100644 index 000000000..47d2003d4 --- /dev/null +++ b/vendor/nikic/php-parser/lib/PhpParser/JsonDecoder.php @@ -0,0 +1,103 @@ +<?php declare(strict_types=1); + +namespace PhpParser; + +class JsonDecoder +{ + /** @var \ReflectionClass[] Node type to reflection class map */ + private $reflectionClassCache; + + public function decode(string $json) { + $value = json_decode($json, true); + if (json_last_error()) { + throw new \RuntimeException('JSON decoding error: ' . json_last_error_msg()); + } + + return $this->decodeRecursive($value); + } + + private function decodeRecursive($value) { + if (\is_array($value)) { + if (isset($value['nodeType'])) { + if ($value['nodeType'] === 'Comment' || $value['nodeType'] === 'Comment_Doc') { + return $this->decodeComment($value); + } + return $this->decodeNode($value); + } + return $this->decodeArray($value); + } + return $value; + } + + private function decodeArray(array $array) : array { + $decodedArray = []; + foreach ($array as $key => $value) { + $decodedArray[$key] = $this->decodeRecursive($value); + } + return $decodedArray; + } + + private function decodeNode(array $value) : Node { + $nodeType = $value['nodeType']; + if (!\is_string($nodeType)) { + throw new \RuntimeException('Node type must be a string'); + } + + $reflectionClass = $this->reflectionClassFromNodeType($nodeType); + /** @var Node $node */ + $node = $reflectionClass->newInstanceWithoutConstructor(); + + if (isset($value['attributes'])) { + if (!\is_array($value['attributes'])) { + throw new \RuntimeException('Attributes must be an array'); + } + + $node->setAttributes($this->decodeArray($value['attributes'])); + } + + foreach ($value as $name => $subNode) { + if ($name === 'nodeType' || $name === 'attributes') { + continue; + } + + $node->$name = $this->decodeRecursive($subNode); + } + + return $node; + } + + private function decodeComment(array $value) : Comment { + $className = $value['nodeType'] === 'Comment' ? Comment::class : Comment\Doc::class; + if (!isset($value['text'])) { + throw new \RuntimeException('Comment must have text'); + } + + return new $className( + $value['text'], + $value['line'] ?? -1, $value['filePos'] ?? -1, $value['tokenPos'] ?? -1, + $value['endLine'] ?? -1, $value['endFilePos'] ?? -1, $value['endTokenPos'] ?? -1 + ); + } + + private function reflectionClassFromNodeType(string $nodeType) : \ReflectionClass { + if (!isset($this->reflectionClassCache[$nodeType])) { + $className = $this->classNameFromNodeType($nodeType); + $this->reflectionClassCache[$nodeType] = new \ReflectionClass($className); + } + return $this->reflectionClassCache[$nodeType]; + } + + private function classNameFromNodeType(string $nodeType) : string { + $className = 'PhpParser\\Node\\' . strtr($nodeType, '_', '\\'); + if (class_exists($className)) { + return $className; + } + + $className .= '_'; + if (class_exists($className)) { + return $className; + } + + throw new \RuntimeException("Unknown node type \"$nodeType\""); + } +} |