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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\VarDumper\Cloner;
use Symfony\Component\VarDumper\Caster\Caster;
/**
* @author Nicolas Grekas <p@tchwork.com>
*/
class Data implements \ArrayAccess, \Countable, \IteratorAggregate
{
private $data;
private $position = 0;
private $key = 0;
private $maxDepth = 20;
private $maxItemsPerDepth = -1;
private $useRefHandles = -1;
/**
* @param array $data An array as returned by ClonerInterface::cloneVar()
*/
public function __construct(array $data)
{
$this->data = $data;
}
/**
* @return string The type of the value
*/
public function getType()
{
$item = $this->data[$this->position][$this->key];
if ($item instanceof Stub && Stub::TYPE_REF === $item->type && !$item->position) {
$item = $item->value;
}
if (!$item instanceof Stub) {
return \gettype($item);
}
if (Stub::TYPE_STRING === $item->type) {
return 'string';
}
if (Stub::TYPE_ARRAY === $item->type) {
return 'array';
}
if (Stub::TYPE_OBJECT === $item->type) {
return $item->class;
}
if (Stub::TYPE_RESOURCE === $item->type) {
return $item->class.' resource';
}
}
/**
* @param bool $recursive Whether values should be resolved recursively or not
*
* @return string|int|float|bool|array|Data[]|null A native representation of the original value
*/
public function getValue($recursive = false)
{
$item = $this->data[$this->position][$this->key];
if ($item instanceof Stub && Stub::TYPE_REF === $item->type && !$item->position) {
$item = $item->value;
}
if (!($item = $this->getStub($item)) instanceof Stub) {
return $item;
}
if (Stub::TYPE_STRING === $item->type) {
return $item->value;
}
$children = $item->position ? $this->data[$item->position] : [];
foreach ($children as $k => $v) {
if ($recursive && !($v = $this->getStub($v)) instanceof Stub) {
continue;
}
$children[$k] = clone $this;
$children[$k]->key = $k;
$children[$k]->position = $item->position;
if ($recursive) {
if (Stub::TYPE_REF === $v->type && ($v = $this->getStub($v->value)) instanceof Stub) {
$recursive = (array) $recursive;
if (isset($recursive[$v->position])) {
continue;
}
$recursive[$v->position] = true;
}
$children[$k] = $children[$k]->getValue($recursive);
}
}
return $children;
}
public function count()
{
return \count($this->getValue());
}
public function getIterator()
{
if (!\is_array($value = $this->getValue())) {
throw new \LogicException(sprintf('%s object holds non-iterable type "%s".', self::class, \gettype($value)));
}
yield from $value;
}
public function __get($key)
{
if (null !== $data = $this->seek($key)) {
$item = $this->getStub($data->data[$data->position][$data->key]);
return $item instanceof Stub || [] === $item ? $data : $item;
}
}
public function __isset($key)
{
return null !== $this->seek($key);
}
public function offsetExists($key)
{
return $this->__isset($key);
}
public function offsetGet($key)
{
return $this->__get($key);
}
public function offsetSet($key, $value)
{
throw new \BadMethodCallException(self::class.' objects are immutable.');
}
public function offsetUnset($key)
{
throw new \BadMethodCallException(self::class.' objects are immutable.');
}
public function __toString()
{
$value = $this->getValue();
if (!\is_array($value)) {
return (string) $value;
}
return sprintf('%s (count=%d)', $this->getType(), \count($value));
}
/**
* Returns a depth limited clone of $this.
*
* @param int $maxDepth The max dumped depth level
*
* @return self A clone of $this
*/
public function withMaxDepth($maxDepth)
{
$data = clone $this;
$data->maxDepth = (int) $maxDepth;
return $data;
}
/**
* Limits the number of elements per depth level.
*
* @param int $maxItemsPerDepth The max number of items dumped per depth level
*
* @return self A clone of $this
*/
public function withMaxItemsPerDepth($maxItemsPerDepth)
{
$data = clone $this;
$data->maxItemsPerDepth = (int) $maxItemsPerDepth;
return $data;
}
/**
* Enables/disables objects' identifiers tracking.
*
* @param bool $useRefHandles False to hide global ref. handles
*
* @return self A clone of $this
*/
public function withRefHandles($useRefHandles)
{
$data = clone $this;
$data->useRefHandles = $useRefHandles ? -1 : 0;
return $data;
}
/**
* Seeks to a specific key in nested data structures.
*
* @param string|int $key The key to seek to
*
* @return self|null A clone of $this or null if the key is not set
*/
public function seek($key)
{
$item = $this->data[$this->position][$this->key];
if ($item instanceof Stub && Stub::TYPE_REF === $item->type && !$item->position) {
$item = $item->value;
}
if (!($item = $this->getStub($item)) instanceof Stub || !$item->position) {
return;
}
$keys = [$key];
switch ($item->type) {
case Stub::TYPE_OBJECT:
$keys[] = Caster::PREFIX_DYNAMIC.$key;
$keys[] = Caster::PREFIX_PROTECTED.$key;
$keys[] = Caster::PREFIX_VIRTUAL.$key;
$keys[] = "\0$item->class\0$key";
// no break
case Stub::TYPE_ARRAY:
case Stub::TYPE_RESOURCE:
break;
default:
return;
}
$data = null;
$children = $this->data[$item->position];
foreach ($keys as $key) {
if (isset($children[$key]) || \array_key_exists($key, $children)) {
$data = clone $this;
$data->key = $key;
$data->position = $item->position;
break;
}
}
return $data;
}
/**
* Dumps data with a DumperInterface dumper.
*/
public function dump(DumperInterface $dumper)
{
$refs = [0];
$this->dumpItem($dumper, new Cursor(), $refs, $this->data[$this->position][$this->key]);
}
/**
* Depth-first dumping of items.
*
* @param DumperInterface $dumper The dumper being used for dumping
* @param Cursor $cursor A cursor used for tracking dumper state position
* @param array &$refs A map of all references discovered while dumping
* @param mixed $item A Stub object or the original value being dumped
*/
private function dumpItem($dumper, $cursor, &$refs, $item)
{
$cursor->refIndex = 0;
$cursor->softRefTo = $cursor->softRefHandle = $cursor->softRefCount = 0;
$cursor->hardRefTo = $cursor->hardRefHandle = $cursor->hardRefCount = 0;
$firstSeen = true;
if (!$item instanceof Stub) {
$cursor->attr = [];
$type = \gettype($item);
if ($item && 'array' === $type) {
$item = $this->getStub($item);
}
} elseif (Stub::TYPE_REF === $item->type) {
if ($item->handle) {
if (!isset($refs[$r = $item->handle - (PHP_INT_MAX >> 1)])) {
$cursor->refIndex = $refs[$r] = $cursor->refIndex ?: ++$refs[0];
} else {
$firstSeen = false;
}
$cursor->hardRefTo = $refs[$r];
$cursor->hardRefHandle = $this->useRefHandles & $item->handle;
$cursor->hardRefCount = $item->refCount;
}
$cursor->attr = $item->attr;
$type = $item->class ?: \gettype($item->value);
$item = $this->getStub($item->value);
}
if ($item instanceof Stub) {
if ($item->refCount) {
if (!isset($refs[$r = $item->handle])) {
$cursor->refIndex = $refs[$r] = $cursor->refIndex ?: ++$refs[0];
} else {
$firstSeen = false;
}
$cursor->softRefTo = $refs[$r];
}
$cursor->softRefHandle = $this->useRefHandles & $item->handle;
$cursor->softRefCount = $item->refCount;
$cursor->attr = $item->attr;
$cut = $item->cut;
if ($item->position && $firstSeen) {
$children = $this->data[$item->position];
if ($cursor->stop) {
if ($cut >= 0) {
$cut += \count($children);
}
$children = [];
}
} else {
$children = [];
}
switch ($item->type) {
case Stub::TYPE_STRING:
$dumper->dumpString($cursor, $item->value, Stub::STRING_BINARY === $item->class, $cut);
break;
case Stub::TYPE_ARRAY:
$item = clone $item;
$item->type = $item->class;
$item->class = $item->value;
// no break
case Stub::TYPE_OBJECT:
case Stub::TYPE_RESOURCE:
$withChildren = $children && $cursor->depth !== $this->maxDepth && $this->maxItemsPerDepth;
$dumper->enterHash($cursor, $item->type, $item->class, $withChildren);
if ($withChildren) {
if ($cursor->skipChildren) {
$withChildren = false;
$cut = -1;
} else {
$cut = $this->dumpChildren($dumper, $cursor, $refs, $children, $cut, $item->type, null !== $item->class);
}
} elseif ($children && 0 <= $cut) {
$cut += \count($children);
}
$cursor->skipChildren = false;
$dumper->leaveHash($cursor, $item->type, $item->class, $withChildren, $cut);
break;
default:
throw new \RuntimeException(sprintf('Unexpected Stub type: %s', $item->type));
}
} elseif ('array' === $type) {
$dumper->enterHash($cursor, Cursor::HASH_INDEXED, 0, false);
$dumper->leaveHash($cursor, Cursor::HASH_INDEXED, 0, false, 0);
} elseif ('string' === $type) {
$dumper->dumpString($cursor, $item, false, 0);
} else {
$dumper->dumpScalar($cursor, $type, $item);
}
}
/**
* Dumps children of hash structures.
*
* @param DumperInterface $dumper
* @param Cursor $parentCursor The cursor of the parent hash
* @param array &$refs A map of all references discovered while dumping
* @param array $children The children to dump
* @param int $hashCut The number of items removed from the original hash
* @param string $hashType A Cursor::HASH_* const
* @param bool $dumpKeys Whether keys should be dumped or not
*
* @return int The final number of removed items
*/
private function dumpChildren($dumper, $parentCursor, &$refs, $children, $hashCut, $hashType, $dumpKeys)
{
$cursor = clone $parentCursor;
++$cursor->depth;
$cursor->hashType = $hashType;
$cursor->hashIndex = 0;
$cursor->hashLength = \count($children);
$cursor->hashCut = $hashCut;
foreach ($children as $key => $child) {
$cursor->hashKeyIsBinary = isset($key[0]) && !preg_match('//u', $key);
$cursor->hashKey = $dumpKeys ? $key : null;
$this->dumpItem($dumper, $cursor, $refs, $child);
if (++$cursor->hashIndex === $this->maxItemsPerDepth || $cursor->stop) {
$parentCursor->stop = true;
return $hashCut >= 0 ? $hashCut + $cursor->hashLength - $cursor->hashIndex : $hashCut;
}
}
return $hashCut;
}
private function getStub($item)
{
if (!$item || !\is_array($item)) {
return $item;
}
$stub = new Stub();
$stub->type = Stub::TYPE_ARRAY;
foreach ($item as $stub->class => $stub->position) {
}
if (isset($item[0])) {
$stub->cut = $item[0];
}
$stub->value = $stub->cut + ($stub->position ? \count($this->data[$stub->position]) : 0);
return $stub;
}
}
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