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<?php
/* ===========================================================================
* Copyright (c) 2018 Zindex Software
*
* Licensed under the MIT License
* =========================================================================== */
namespace Opis\Closure;
use Closure;
use ReflectionFunction;
class ReflectionClosure extends ReflectionFunction
{
protected $code;
protected $tokens;
protected $hashedName;
protected $useVariables;
protected $isStaticClosure;
protected $isScopeRequired;
protected $isBindingRequired;
protected static $files = array();
protected static $classes = array();
protected static $functions = array();
protected static $constants = array();
protected static $structures = array();
/**
* ReflectionClosure constructor.
* @param Closure $closure
* @param string|null $code
* @throws \ReflectionException
*/
public function __construct(Closure $closure, $code = null)
{
$this->code = $code;
parent::__construct($closure);
}
/**
* @return bool
*/
public function isStatic()
{
if ($this->isStaticClosure === null) {
$this->isStaticClosure = strtolower(substr($this->getCode(), 0, 6)) === 'static';
}
return $this->isStaticClosure;
}
/**
* @return string
*/
public function getCode()
{
if($this->code !== null){
return $this->code;
}
$fileName = $this->getFileName();
$line = $this->getStartLine() - 1;
$match = ClosureStream::STREAM_PROTO . '://';
if ($line === 1 && substr($fileName, 0, strlen($match)) === $match) {
return $this->code = substr($fileName, strlen($match));
}
$className = null;
if (null !== $className = $this->getClosureScopeClass()) {
$className = '\\' . trim($className->getName(), '\\');
}
if($php7 = PHP_MAJOR_VERSION === 7){
switch (PHP_MINOR_VERSION){
case 0:
$php7_types = array('string', 'int', 'bool', 'float');
break;
case 1:
$php7_types = array('string', 'int', 'bool', 'float', 'void');
break;
case 2:
default:
$php7_types = array('string', 'int', 'bool', 'float', 'void', 'object');
}
}
$ns = $this->getNamespaceName();
$nsf = $ns == '' ? '' : ($ns[0] == '\\' ? $ns : '\\' . $ns);
$_file = var_export($fileName, true);
$_dir = var_export(dirname($fileName), true);
$_namespace = var_export($ns, true);
$_class = var_export(trim($className, '\\'), true);
$_function = $ns . ($ns == '' ? '' : '\\') . '{closure}';
$_method = ($className == '' ? '' : trim($className, '\\') . '::') . $_function;
$_function = var_export($_function, true);
$_method = var_export($_method, true);
$_trait = null;
$hasTraitSupport = defined('T_TRAIT_C');
$tokens = $this->getTokens();
$state = $lastState = 'start';
$open = 0;
$code = '';
$id_start = $id_start_ci = $id_name = $context = '';
$classes = $functions = $constants = null;
$use = array();
$lineAdd = 0;
$isUsingScope = false;
$isUsingThisObject = false;
for($i = 0, $l = count($tokens); $i < $l; $i++) {
$token = $tokens[$i];
switch ($state) {
case 'start':
if ($token[0] === T_FUNCTION || $token[0] === T_STATIC) {
$code .= $token[1];
$state = $token[0] === T_FUNCTION ? 'function' : 'static';
}
break;
case 'static':
if ($token[0] === T_WHITESPACE || $token[0] === T_COMMENT || $token[0] === T_FUNCTION) {
$code .= $token[1];
if ($token[0] === T_FUNCTION) {
$state = 'function';
}
} else {
$code = '';
$state = 'start';
}
break;
case 'function':
switch ($token[0]){
case T_STRING:
$code = '';
$state = 'named_function';
break;
case '(':
$code .= '(';
$state = 'closure_args';
break;
default:
$code .= is_array($token) ? $token[1] : $token;
}
break;
case 'named_function':
if($token[0] === T_FUNCTION || $token[0] === T_STATIC){
$code = $token[1];
$state = $token[0] === T_FUNCTION ? 'function' : 'static';
}
break;
case 'closure_args':
switch ($token[0]){
case T_NS_SEPARATOR:
case T_STRING:
$id_start = $token[1];
$id_start_ci = strtolower($id_start);
$id_name = '';
$context = 'args';
$state = 'id_name';
$lastState = 'closure_args';
break;
case T_USE:
$code .= $token[1];
$state = 'use';
break;
case '=':
$code .= $token;
$lastState = 'closure_args';
$state = 'ignore_next';
break;
case ':':
$code .= ':';
$state = 'return';
break;
case '{':
$code .= '{';
$state = 'closure';
$open++;
break;
default:
$code .= is_array($token) ? $token[1] : $token;
}
break;
case 'use':
switch ($token[0]){
case T_VARIABLE:
$use[] = substr($token[1], 1);
$code .= $token[1];
break;
case '{':
$code .= '{';
$state = 'closure';
$open++;
break;
case ':':
$code .= ':';
$state = 'return';
break;
default:
$code .= is_array($token) ? $token[1] : $token;
break;
}
break;
case 'return':
switch ($token[0]){
case T_WHITESPACE:
case T_COMMENT:
case T_DOC_COMMENT:
$code .= $token[1];
break;
case T_NS_SEPARATOR:
case T_STRING:
$id_start = $token[1];
$id_start_ci = strtolower($id_start);
$id_name = '';
$context = 'return_type';
$state = 'id_name';
$lastState = 'return';
break 2;
case '{':
$code .= '{';
$state = 'closure';
$open++;
break;
default:
$code .= is_array($token) ? $token[1] : $token;
break;
}
break;
case 'closure':
switch ($token[0]){
case T_CURLY_OPEN:
case T_DOLLAR_OPEN_CURLY_BRACES:
case T_STRING_VARNAME:
case '{':
$code .= '{';
$open++;
break;
case '}':
$code .= '}';
if(--$open === 0){
break 3;
}
break;
case T_LINE:
$code .= $token[2] - $line + $lineAdd;
break;
case T_FILE:
$code .= $_file;
break;
case T_DIR:
$code .= $_dir;
break;
case T_NS_C:
$code .= $_namespace;
break;
case T_CLASS_C:
$code .= $_class;
break;
case T_FUNC_C:
$code .= $_function;
break;
case T_METHOD_C:
$code .= $_method;
break;
case T_COMMENT:
if (substr($token[1], 0, 8) === '#trackme') {
$timestamp = time();
$code .= '/**' . PHP_EOL;
$code .= '* Date : ' . date(DATE_W3C, $timestamp) . PHP_EOL;
$code .= '* Timestamp : ' . $timestamp . PHP_EOL;
$code .= '* Line : ' . ($line + 1) . PHP_EOL;
$code .= '* File : ' . $_file . PHP_EOL . '*/' . PHP_EOL;
$lineAdd += 5;
} else {
$code .= $token[1];
}
break;
case T_VARIABLE:
if($token[1] == '$this'){
$isUsingThisObject = true;
}
$code .= $token[1];
break;
case T_STATIC:
$isUsingScope = true;
$code .= $token[1];
break;
case T_NS_SEPARATOR:
case T_STRING:
$id_start = $token[1];
$id_start_ci = strtolower($id_start);
$id_name = '';
$context = 'root';
$state = 'id_name';
$lastState = 'closure';
break 2;
case T_NEW:
$code .= $token[1];
$context = 'new';
$state = 'id_start';
$lastState = 'closure';
break 2;
case T_INSTANCEOF:
$code .= $token[1];
$context = 'instanceof';
$state = 'id_start';
$lastState = 'closure';
break;
case T_OBJECT_OPERATOR:
case T_DOUBLE_COLON:
$code .= $token[1];
$lastState = 'closure';
$state = 'ignore_next';
break;
case T_FUNCTION:
$code .= $token[1];
$state = 'closure_args';
break;
default:
if ($hasTraitSupport && $token[0] == T_TRAIT_C) {
if ($_trait === null) {
$startLine = $this->getStartLine();
$endLine = $this->getEndLine();
$structures = $this->getStructures();
$_trait = '';
foreach ($structures as &$struct) {
if ($struct['type'] === 'trait' &&
$struct['start'] <= $startLine &&
$struct['end'] >= $endLine
) {
$_trait = ($ns == '' ? '' : $ns . '\\') . $struct['name'];
break;
}
}
$_trait = var_export($_trait, true);
}
$token[1] = $_trait;
} else {
$code .= is_array($token) ? $token[1] : $token;
}
}
break;
case 'ignore_next':
switch ($token[0]){
case T_WHITESPACE:
$code .= $token[1];
break;
case T_CLASS:
case T_STATIC:
case T_VARIABLE:
case T_STRING:
$code .= $token[1];
$state = $lastState;
break;
default:
$state = $lastState;
$i--;
}
break;
case 'id_start':
switch ($token[0]){
case T_WHITESPACE:
$code .= $token[1];
break;
case T_NS_SEPARATOR:
case T_STRING:
case T_STATIC:
$id_start = $token[1];
$id_start_ci = strtolower($id_start);
$id_name = '';
$state = 'id_name';
break 2;
case T_VARIABLE:
$code .= $token[1];
$state = $lastState;
break;
case T_CLASS:
$code .= $token[1];
$state = 'anonymous';
break;
default:
$i--;//reprocess last
$state = 'id_name';
}
break;
case 'id_name':
switch ($token[0]){
case T_NS_SEPARATOR:
case T_STRING:
$id_name .= $token[1];
break;
case T_WHITESPACE:
$id_name .= $token[1];
break;
case '(':
if($context === 'new' || false !== strpos($id_name, '\\')){
if($id_start !== '\\'){
if ($classes === null) {
$classes = $this->getClasses();
}
if (isset($classes[$id_start_ci])) {
$id_start = $classes[$id_start_ci];
}
if($id_start[0] !== '\\'){
$id_start = $nsf . '\\' . $id_start;
}
}
} else {
if($id_start !== '\\'){
if($functions === null){
$functions = $this->getFunctions();
}
if(isset($functions[$id_start_ci])){
$id_start = $functions[$id_start_ci];
}
}
}
$code .= $id_start . $id_name . '(';
$state = $lastState;
break;
case T_VARIABLE:
case T_DOUBLE_COLON:
if($id_start !== '\\') {
if($id_start_ci === 'self' || $id_start_ci === 'static' || $id_start_ci === 'parent'){
$isUsingScope = true;
} elseif (!($php7 && in_array($id_start_ci, $php7_types))){
if ($classes === null) {
$classes = $this->getClasses();
}
if (isset($classes[$id_start_ci])) {
$id_start = $classes[$id_start_ci];
}
if($id_start[0] !== '\\'){
$id_start = $nsf . '\\' . $id_start;
}
}
}
$code .= $id_start . $id_name . $token[1];
$state = $token[0] === T_DOUBLE_COLON ? 'ignore_next' : $lastState;
break;
default:
if($id_start !== '\\'){
if($context === 'instanceof' || $context === 'args' || $context === 'return_type' || $context === 'extends'){
if($id_start_ci === 'self' || $id_start_ci === 'static' || $id_start_ci === 'parent'){
$isUsingScope = true;
} elseif (!($php7 && in_array($id_start_ci, $php7_types))){
if($classes === null){
$classes = $this->getClasses();
}
if(isset($classes[$id_start_ci])){
$id_start = $classes[$id_start_ci];
}
if($id_start[0] !== '\\'){
$id_start = $nsf . '\\' . $id_start;
}
}
} else {
if($constants === null){
$constants = $this->getConstants();
}
if(isset($constants[$id_start])){
$id_start = $constants[$id_start];
}
}
}
$code .= $id_start . $id_name;
$state = $lastState;
$i--;//reprocess last token
}
break;
case 'anonymous':
switch ($token[0]) {
case T_NS_SEPARATOR:
case T_STRING:
$id_start = $token[1];
$id_start_ci = strtolower($id_start);
$id_name = '';
$state = 'id_name';
$context = 'extends';
$lastState = 'anonymous';
break;
case '{':
$state = 'closure';
$i--;
break;
default:
$code .= is_array($token) ? $token[1] : $token;
}
break;
}
}
$this->isBindingRequired = $isUsingThisObject;
$this->isScopeRequired = $isUsingScope;
$this->code = $code;
$this->useVariables = empty($use) ? $use : array_intersect_key($this->getStaticVariables(), array_flip($use));
return $this->code;
}
/**
* @return array
*/
public function getUseVariables()
{
if($this->useVariables !== null){
return $this->useVariables;
}
$tokens = $this->getTokens();
$use = array();
$state = 'start';
foreach ($tokens as &$token) {
$is_array = is_array($token);
switch ($state) {
case 'start':
if ($is_array && $token[0] === T_USE) {
$state = 'use';
}
break;
case 'use':
if ($is_array) {
if ($token[0] === T_VARIABLE) {
$use[] = substr($token[1], 1);
}
} elseif ($token == ')') {
break 2;
}
break;
}
}
$this->useVariables = empty($use) ? $use : array_intersect_key($this->getStaticVariables(), array_flip($use));
return $this->useVariables;
}
/**
* return bool
*/
public function isBindingRequired()
{
if($this->isBindingRequired === null){
$this->getCode();
}
return $this->isBindingRequired;
}
/**
* return bool
*/
public function isScopeRequired()
{
if($this->isScopeRequired === null){
$this->getCode();
}
return $this->isScopeRequired;
}
/**
* @return string
*/
protected function getHashedFileName()
{
if ($this->hashedName === null) {
$this->hashedName = md5($this->getFileName());
}
return $this->hashedName;
}
/**
* @return array
*/
protected function getFileTokens()
{
$key = $this->getHashedFileName();
if (!isset(static::$files[$key])) {
static::$files[$key] = token_get_all(file_get_contents($this->getFileName()));
}
return static::$files[$key];
}
/**
* @return array
*/
protected function getTokens()
{
if ($this->tokens === null) {
$tokens = $this->getFileTokens();
$startLine = $this->getStartLine();
$endLine = $this->getEndLine();
$results = array();
$start = false;
foreach ($tokens as &$token) {
if (!is_array($token)) {
if ($start) {
$results[] = $token;
}
continue;
}
$line = $token[2];
if ($line <= $endLine) {
if ($line >= $startLine) {
$start = true;
$results[] = $token;
}
continue;
}
break;
}
$this->tokens = $results;
}
return $this->tokens;
}
/**
* @return array
*/
protected function getClasses()
{
$key = $this->getHashedFileName();
if (!isset(static::$classes[$key])) {
$this->fetchItems();
}
return static::$classes[$key];
}
/**
* @return array
*/
protected function getFunctions()
{
$key = $this->getHashedFileName();
if (!isset(static::$functions[$key])) {
$this->fetchItems();
}
return static::$functions[$key];
}
/**
* @return array
*/
protected function getConstants()
{
$key = $this->getHashedFileName();
if (!isset(static::$constants[$key])) {
$this->fetchItems();
}
return static::$constants[$key];
}
/**
* @return array
*/
protected function getStructures()
{
$key = $this->getHashedFileName();
if (!isset(static::$structures[$key])) {
$this->fetchItems();
}
return static::$structures[$key];
}
protected function fetchItems()
{
$key = $this->getHashedFileName();
$classes = array();
$functions = array();
$constants = array();
$structures = array();
$tokens = $this->getFileTokens();
$open = 0;
$state = 'start';
$prefix = '';
$name = '';
$alias = '';
$isFunc = $isConst = false;
$startLine = $endLine = 0;
$structType = $structName = '';
$structIgnore = false;
$hasTraitSupport = defined('T_TRAIT');
foreach ($tokens as $token) {
$is_array = is_array($token);
switch ($state) {
case 'start':
if ($is_array) {
switch ($token[0]) {
case T_CLASS:
case T_INTERFACE:
$state = 'before_structure';
$startLine = $token[2];
$structType = $token[0] == T_CLASS ? 'class' : 'interface';
break;
case T_USE:
$state = 'use';
$prefix = $name = $alias = '';
$isFunc = $isConst = false;
break;
case T_FUNCTION:
$state = 'structure';
$structIgnore = true;
break;
default:
if ($hasTraitSupport && $token[0] == T_TRAIT) {
$state = 'before_structure';
$startLine = $token[2];
$structType = 'trait';
}
break;
}
}
break;
case 'use':
if ($is_array) {
switch ($token[0]) {
case T_FUNCTION:
$isFunc = true;
break;
case T_CONST:
$isConst = true;
break;
case T_NS_SEPARATOR:
$name .= $token[1];
break;
case T_STRING:
$name .= $token[1];
$alias = $token[1];
break;
case T_AS:
if ($name[0] !== '\\' && $prefix === '') {
$name = '\\' . $name;
}
$state = 'alias';
break;
}
} else {
if ($name[0] !== '\\' && $prefix === '') {
$name = '\\' . $name;
}
if($token == '{') {
$prefix = $name;
$name = '';
} else {
if($isFunc){
$functions[strtolower($alias)] = $prefix . $name;
} elseif ($isConst){
$constants[$alias] = $prefix . $name;
} else {
$classes[strtolower($alias)] = $prefix . $name;
}
$name = '';
$state = $token == ',' ? 'use' : 'start';
}
}
break;
case 'alias':
if ($is_array) {
if($token[0] == T_STRING){
$alias = $token[1];
}
} else {
if($isFunc){
$functions[strtolower($alias)] = $prefix . $name;
} elseif ($isConst){
$constants[$alias] = $prefix . $name;
} else {
$classes[strtolower($alias)] = $prefix . $name;
}
$name = '';
$state = $token == ',' ? 'use' : 'start';
}
break;
case 'before_structure':
if ($is_array && $token[0] == T_STRING) {
$structName = $token[1];
$state = 'structure';
}
break;
case 'structure':
if (!$is_array) {
if ($token === '{') {
$open++;
} elseif ($token === '}') {
if (--$open == 0) {
if(!$structIgnore){
$structures[] = array(
'type' => $structType,
'name' => $structName,
'start' => $startLine,
'end' => $endLine,
);
}
$structIgnore = false;
$state = 'start';
}
}
} else {
if($token[0] === T_CURLY_OPEN ||
$token[0] === T_DOLLAR_OPEN_CURLY_BRACES ||
$token[0] === T_STRING_VARNAME){
$open++;
}
$endLine = $token[2];
}
break;
}
}
static::$classes[$key] = $classes;
static::$functions[$key] = $functions;
static::$constants[$key] = $constants;
static::$structures[$key] = $structures;
}
}