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<?php
/*
* This file is part of sebastian/global-state.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace SebastianBergmann\GlobalState;
use ReflectionProperty;
/**
* Restorer of snapshots of global state.
*/
class Restorer
{
/**
* Deletes function definitions that are not defined in a snapshot.
*
* @throws RuntimeException when the uopz_delete() function is not available
*
* @see https://github.com/krakjoe/uopz
*/
public function restoreFunctions(Snapshot $snapshot)
{
if (!\function_exists('uopz_delete')) {
throw new RuntimeException('The uopz_delete() function is required for this operation');
}
$functions = \get_defined_functions();
foreach (\array_diff($functions['user'], $snapshot->functions()) as $function) {
uopz_delete($function);
}
}
/**
* Restores all global and super-global variables from a snapshot.
*/
public function restoreGlobalVariables(Snapshot $snapshot)
{
$superGlobalArrays = $snapshot->superGlobalArrays();
foreach ($superGlobalArrays as $superGlobalArray) {
$this->restoreSuperGlobalArray($snapshot, $superGlobalArray);
}
$globalVariables = $snapshot->globalVariables();
foreach (\array_keys($GLOBALS) as $key) {
if ($key != 'GLOBALS' &&
!\in_array($key, $superGlobalArrays) &&
!$snapshot->blacklist()->isGlobalVariableBlacklisted($key)) {
if (\array_key_exists($key, $globalVariables)) {
$GLOBALS[$key] = $globalVariables[$key];
} else {
unset($GLOBALS[$key]);
}
}
}
}
/**
* Restores all static attributes in user-defined classes from this snapshot.
*/
public function restoreStaticAttributes(Snapshot $snapshot)
{
$current = new Snapshot($snapshot->blacklist(), false, false, false, false, true, false, false, false, false);
$newClasses = \array_diff($current->classes(), $snapshot->classes());
unset($current);
foreach ($snapshot->staticAttributes() as $className => $staticAttributes) {
foreach ($staticAttributes as $name => $value) {
$reflector = new ReflectionProperty($className, $name);
$reflector->setAccessible(true);
$reflector->setValue($value);
}
}
foreach ($newClasses as $className) {
$class = new \ReflectionClass($className);
$defaults = $class->getDefaultProperties();
foreach ($class->getProperties() as $attribute) {
if (!$attribute->isStatic()) {
continue;
}
$name = $attribute->getName();
if ($snapshot->blacklist()->isStaticAttributeBlacklisted($className, $name)) {
continue;
}
if (!isset($defaults[$name])) {
continue;
}
$attribute->setAccessible(true);
$attribute->setValue($defaults[$name]);
}
}
}
/**
* Restores a super-global variable array from this snapshot.
*/
private function restoreSuperGlobalArray(Snapshot $snapshot, string $superGlobalArray)
{
$superGlobalVariables = $snapshot->superGlobalVariables();
if (isset($GLOBALS[$superGlobalArray]) &&
\is_array($GLOBALS[$superGlobalArray]) &&
isset($superGlobalVariables[$superGlobalArray])) {
$keys = \array_keys(
\array_merge(
$GLOBALS[$superGlobalArray],
$superGlobalVariables[$superGlobalArray]
)
);
foreach ($keys as $key) {
if (isset($superGlobalVariables[$superGlobalArray][$key])) {
$GLOBALS[$superGlobalArray][$key] = $superGlobalVariables[$superGlobalArray][$key];
} else {
unset($GLOBALS[$superGlobalArray][$key]);
}
}
}
}
}